Interlocking device between three-position mechanism and circuit breaker mechanism and switch cabinet with interlocking device

Abstract

The utility model relates to an interlocking device between a three-station mechanism and a circuit breaker mechanism, which comprises a three-station interlocking driving plate provided with an interlocking driving roller or an interlocking driving cam in operational connection with the three-station interlocking driving plate; the interlocking cover is provided with an interlocking rod extending into the circuit breaker cabinet body; an interlocking baffle; the main shaft is sleeved with a closing interlocking crank arm, and the closing interlocking crank arm can be switched between a first position and a second position; when the interlocking rod is located at the first position, the interlocking baffle plate locks the three-position interlocking driving plate, and when the interlocking rod is located at the second position, the interlocking rod is pressed down to stop a closing locking plate of the interlocking device so as to lock a closing button plate of the interlocking device. Therefore, interlocking of the three-station mechanism and the circuit breaker mechanism is realized through a full-rigid design. The utility model also relates to a switch cabinet with the switch cabinet.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to an interlocking device between a three-position mechanism and a circuit breaker mechanism and a switch cabinet with the interlocking device. Background Art

[0002] In recent years, switchgear has become widely used as a vital component in power systems. It can include three-position switches, three-position operating mechanisms, circuit breakers, and circuit breaker operating mechanisms. The circuit breaker is the most crucial component in air / gas insulated switchgear. In addition to connecting and disconnecting the load (rated) current of electrical equipment during normal operation, it can also reliably interrupt short-circuit currents in the event of a power system fault. Meanwhile, the primary function of an isolating switch is to physically isolate the circuit requiring maintenance from the operating (live) circuit through a visible break, ensuring safe electrical maintenance. Disconnecting switches typically lack arc extinguishing devices and therefore lack the ability to interrupt short-circuit currents. The primary function of a grounding switch is to ground high-voltage equipment or lines during maintenance, ensuring the safety of maintenance personnel. A grounding switch needs to close short-circuit currents, so it must possess a certain level of short-circuit closing capacity and dynamic and thermal stability. However, it does not need to interrupt load or short-circuit currents, and therefore lacks arc extinguishing devices. A grounding switch and isolating switch can be combined to form a three-position switch. Subsequently, the three-position operating mechanism can drive the three-position switch to switch between the closed state, the open state and the isolated state, and the circuit breaker operating mechanism can drive the circuit breaker to switch between the closed state and the open state.

[0003] Since neither the grounding switch nor the isolating switch has the ability to interrupt short-circuit current, the five-protection interlocking of high-voltage equipment specifies the interlocking of the circuit breaker with the isolating, grounding or three-position switch as follows:

[0004] (1) Prevent opening and closing of isolating switches under load;

[0005] (2) Prevent the grounding switch from being closed while energized;

[0006] (3) Prevent the circuit breaker from being closed with the ground wire.

[0007] The five-protection interlocking function of switchgear typically requires an interlock mechanism between the three-position operating mechanism and the circuit breaker operating mechanism to prevent human error from operating the three-position switch while the circuit breaker is in the closed state, thereby preventing switchgear failure. Specifically, the interlocking mechanism must ensure that the three-position switch cannot be operated while the circuit breaker is in the closed state, but can only be operated when the circuit breaker is in the open state. Furthermore, the three-position switch cannot close the circuit breaker during operation.

[0008] As an example of its function, a Chinese utility model patent with authorization publication number CN213519722U discloses an interlocking device between a three-position mechanism and a circuit breaker mechanism, wherein the interlocking device includes: a first cable, one end of which is connected to the isolation operation hole cover. When the circuit breaker mechanism is in the open state, the isolation operation hole cover is rotated from the closed position to the open position along the first direction, the first cable is pulled; a rotating member, which is pivotally mounted in the circuit breaker mechanism, the other end of the first cable is connected to the first end of the rotating member. When the first cable is pulled by the isolation operation hole cover, the rotating member rotates in a second direction opposite to the first direction; a second cable, one end of which is connected to the rotating member and is pulled when the rotating member rotates in the second direction; a transmission member, connected to the other end of the second cable. When the second cable is pulled by the rotating member, the transmission member rotates in the first direction and is connected to an indicator member during the rotation process. The indicator member is pivotally mounted in the circuit breaker mechanism, and the rotation of the transmission member drives the indicator member to pivot.

[0009] However, in practice, interlocking devices, which utilize flexible cables that can only transmit tension but not withstand pressure, have been found to suffer from cable jamming, inadequate movement of moving parts in the transmission chain, or inflexible or even failure after a period of use. Since interlocking devices are typically installed inside switchgear, repairing or replacing them in the event of a malfunction or failure is cumbersome and costly. Furthermore, such interlocking devices suffer from a large number of parts, complex assembly, and relatively high costs.

[0010] Therefore, there is a need in the art to improve the interlocking device between the three-position operating mechanism and the circuit breaker operating mechanism so that the interlocking device can work reliably over a longer service life, has a simple structure, is easy to install, and has a low cost. Utility Model Content

[0011] The utility model aims to provide an interlocking device between a three-position mechanism and a circuit breaker mechanism, which can at least solve some of the above problems.

[0012] The utility model also aims to provide a switch cabinet using the improved interlocking mechanism.

[0013] According to one aspect of the present invention, an interlocking device between a three-position mechanism and a circuit breaker mechanism is provided, which is installed in the cabinet of the switch cabinet and is used to interlock the three-position mechanism with the circuit breaker mechanism, and comprises: a three-position interlocking drive plate provided in the three-position mechanism, which is designed to be movable in a controlled manner relative to the circuit breaker cabinet to switch between the grounding position and the isolation position of the three-position switch, wherein the three-position interlocking drive plate has an interlocking drive roller or an interlocking drive cam operatively connected thereto; an interlocking cover operatively connected to the interlocking drive roller or the interlocking drive cam, which has an interlocking rod extending into the circuit breaker cabinet; an interlocking baffle, the upper portion of which has a baffle head operatively connected to the three-position interlocking drive plate; and a circuit breaker mechanism provided in the circuit breaker cabinet. A main shaft is connected to the switch, and a closing interlock crank arm is provided on it and can rotate therewith, wherein the closing interlock crank arm can switch between a first position for closing the circuit breaker mechanism and a second position for opening the circuit breaker mechanism; when the closing interlock crank arm is in the first position, the closing interlock crank arm actuates the interlock baffle so that the interlock baffle locks the three-position interlock drive plate through its baffle head; when the closing interlock crank arm is in the second position, the closing interlock crank arm releases the actuation of the interlock baffle to allow the three-position interlock drive plate to move in a controlled manner and enable the interlock drive roller or interlock drive cam to press down the interlock rod, wherein when the interlock rod is pressed down, the closing locking plate of the stop interlock device is locked to lock the closing button plate of the interlock device.

[0014] Compared with the prior art, all components in the interlocking device between the three-position mechanism and the circuit breaker mechanism in the utility model are rigidly designed parts. These parts are reliably overlapped and are not easily deformed during long-term use. Rigid interlocking between the three-position mechanism and the circuit breaker mechanism can be achieved. On the basis of achieving the interlocking between the three-position mechanism and the circuit breaker mechanism, the service life and reliability of the interlocking device are effectively improved. Furthermore, the interlocking device of the utility model has a small number of structures, is easy to install and has a low cost.

[0015] As a preferred aspect of the present invention, the interlocking drive roller includes a pair of rollers, and the pair of rollers are rotatably connected to a mounting plate fixedly connected to the three-station interlocking drive plate.

[0016] As a preferred aspect of the present invention, the interlocking drive cam includes a single cam that can be operatively connected to the interlocking cover, wherein the three-station interlocking drive plate is provided with a guide groove for guiding the single cam.

[0017] As a preferred aspect of the present invention, the closing locking plate is designed to be arranged approximately perpendicular to the closing interlock plate, and is rotatably mounted to the circuit breaker cabinet via a pivot portion approximately located in the middle. It also includes a pressing portion located behind the pivot portion that can be operatively connected to the interlock rod of the interlock cover extending into the circuit breaker cabinet.

[0018] Preferably, the closing locking plate is located above the closing button plate and has a stop portion protruding toward the closing button plate, and the closing button plate has a stop portion that can be operatively connected to the stop portion, thereby stopping the closing locking plate of the interlocking device when the interlocking rod is pressed down to actuate the closing locking plate.

[0019] Preferably, a baffle locking portion is provided on the upper portion of the closing interlock plate, wherein the closing locking plate is designed to be able to engage with the baffle locking portion to lock the closing interlock plate when it is operatively connected to the interlock rod of the interlock cover extending into the circuit breaker cabinet.

[0020] Preferably, the closing interlock plate is designed to be elongated extending along the height direction of the circuit breaker cabinet and is provided with a plurality of narrow guide grooves along its own length direction, wherein the guide grooves are provided with guide protrusions extending from the wall of the circuit breaker cabinet and capable of abutting against the guide protrusions.

[0021] Preferably, it also includes a reset tension spring located at the lower part of the closing interlock plate, which is designed to apply an elastic force to the closing interlock plate toward the closing interlock crank arm, so that the closing interlock plate and the closing interlock crank arm located below it are kept in close contact.

[0022] Preferably, the three-station mechanism further includes fixed brackets arranged in pairs, and the three-station interlocking drive plate is located between the fixed brackets arranged in pairs.

[0023] According to another aspect of the present invention, a switch cabinet is provided, which includes a circuit breaker cabinet, a circuit breaker mechanism mounted to the circuit breaker cabinet, and an interlocking device between the three-position mechanism and the circuit breaker mechanism, wherein the interlocking device between the three-position mechanism and the circuit breaker mechanism is mounted on the cabinet and connected to the circuit breaker operating mechanism.

[0024] Some of the other features and advantages of the present invention will be apparent to those skilled in the art after reading this application, and the other parts will be described in the following detailed description in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, wherein:

[0026] Figure 1 It is a schematic diagram of the circuit breaker mechanism of the interlocking device between the three-position mechanism and the circuit breaker mechanism according to the present utility model in a closed state;

[0027] Figure 2 yes Figure 1 A partial enlarged schematic diagram;

[0028] Figure 3 It is a schematic diagram of the circuit breaker mechanism switching from closing to opening according to the interlocking device between the three-position mechanism and the circuit breaker mechanism of the utility model;

[0029] Figure 4 It is a schematic diagram of the circuit breaker mechanism switching from opening to closing according to the interlocking device between the three-position mechanism and the circuit breaker mechanism of the utility model;

[0030] Figure 5 Schematic diagram of locking the circuit breaker mechanism during operation of the three-position mechanism according to the interlocking device between the three-position mechanism and the circuit breaker mechanism of the present invention;

[0031] Figure 6 yes Figure 5 A partial enlarged schematic diagram;

[0032] Figure 7 yes Figure 6 Schematic diagram from another perspective.

[0033] Description of reference numerals:

[0034] 10-circuit breaker mechanism; 10A-closing interlocking arm; 10B-main shaft; 10C-jacking part;

[0035] 11-closing interlock plate; 12-interlock baffle;

[0036] 13-Baffle head; 14-Reset spring; 15-Baffle stopper; 16-Circuit breaker cabinet;

[0037] 20-three-station mechanism; 21A, 21B-fixed brackets; 22-three-station interlocking drive plate;

[0038] 23- interlock drive roller; 23A- interlock drive cam; 31- closing locking plate; 31A- pivoting portion;

[0039] 31B-pressing portion; 31C-stop portion; 32-closing button plate; 32A-stop portion;

[0040] 33-interlocking cover; 33A-return spring; 33B-interlocking lever; DETAILED DESCRIPTION

[0041] With reference to the accompanying drawings, a schematic diagram of the interlocking device between the three-position mechanism and the circuit breaker mechanism disclosed in the present invention is described in detail. Although the drawings are provided to illustrate some embodiments of the present invention, they are not necessarily drawn to the dimensions of the specific embodiments, and certain features may be enlarged, removed, or partially cut away to better illustrate and explain the disclosure of the present invention. Some components in the drawings may be repositioned as needed without affecting the technical effect. The phrase "in the drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.

[0042] Certain directional terms used in the following description of the drawings, such as "inner," "outer," "above," "below," and other directional terms, should be understood to have their normal meanings and refer to those directions when the drawings are normally viewed. Unless otherwise indicated, the directional terms used in this specification are generally in accordance with conventional directions understood by those skilled in the art.

[0043] The terms "first", "first", "second", "second" and similar terms used in this utility model do not indicate any order, quantity or importance, but are used to distinguish one component from other components.

[0044] The terms "joining", "connection" and similar terms used in the present invention include both indirect connection of two components with the aid of an intermediate layer (such as adhesive, welding agent, etc.) or an intermediate piece (such as a connector, transition piece, etc.), and direct connection of two components without the aid of any intermediate layer (such as adhesive, welding agent, etc.) or intermediate piece (such as a connector, transition piece, etc.).

[0045] First, please see Figure 1 and Figure 2 In a first embodiment of the present invention, an interlocking device is provided between a three-position mechanism 20 and a circuit breaker mechanism 10 , wherein the interlocking device is used, for example, in a switch cabinet having the three-position mechanism 20 and the circuit breaker mechanism 10 .

[0046] like Figure 1As shown, the switchgear includes a circuit breaker cabinet 16 located below, within which the circuit breaker mechanism 10 is mounted. A main shaft 10B is also provided in the lower portion of the circuit breaker cabinet 16. This main shaft 10B is designed to be rotatably connected relative to the circuit breaker cabinet 16, allowing it to rotate under the action of an external force (e.g., an operating mechanism operatively connected thereto, not shown). A closing interlock lever 10A is sleeved on this main shaft 10B and rotates therewith. One side of this closing interlock lever 10A has a raised portion, such as a drive roller, that is operatively connected to the circuit breaker mechanism 10. This allows the circuit breaker mechanism 10 to be opened and closed as the closing interlock lever 10A rotates with the main shaft 10B.

[0047] Specifically, Figure 1 The closing interlocking arm 10A rotates clockwise with the main shaft 10B until it is located at Figure 1 The lower right raised portion in the circuit breaker mechanism 10 is located in the first position of the closing state. If the closing interlocking arm 10A rotates counterclockwise with the main shaft 10B to Figure 3 When the second position is shown in FIG, the protrusion makes the circuit breaker mechanism 10 in the open state. Thus, by rotating the main shaft 10B, the closing interlocking arm 10A can be placed in the first position (such as Figure 1 ) and the second position (as shown Figure 3 to switch between the two modes.

[0048] On the side of the closing interlocking crank arm 10A substantially opposite to the protruding portion such as the driving roller, a lifting portion 10C such as a lifting roller is provided which can rotate together with the closing interlocking crank arm 10A switching between the first position and the second position. Figure 1 As shown, when the closing interlocking arm 10A is in its first position, the top portion 10C is located at the uppermost position in the height direction of the circuit breaker cabinet 16, and as shown in FIG. Figure 3 As shown, when the closing interlocking arm 10A is in its second position, the lifting portion 10C is located at the lowest position in the height direction of the circuit breaker cabinet 16.

[0049] A slender closing interlock plate 11 is located at the upper end of the raised portion 10C of the closing interlock lever 10A, maintaining close contact therewith at all times and extending along the height of the circuit breaker cabinet 16. Multiple narrow guide grooves are provided along the length of the closing interlock plate 11, and guide protrusions extending from the wall of the circuit breaker cabinet 16 can be positioned within these grooves to engage with them. This allows the closing interlock plate 11 to move vertically relative to the circuit breaker cabinet 16 under the action of an external force (e.g., the vertically movable raised portion 10C abutting against it). At the same time, a return tension spring 14 is additionally provided at the lower portion of the closing interlock plate 11, for example, to apply an elastic force to the closing interlock plate 11 toward the top portion 10C of the closing interlock crank arm 10A, thereby, on the one hand, keeping the closing interlock plate 11 in close contact with the top portion 10C located below it at all times; on the other hand, by default, keeping the top portion 10C of the closing interlock crank arm 10A associated with the closing interlock plate 11 in the second position (such as the second position) for opening the circuit breaker. Figure 3 shown).

[0050] An interlocking baffle 12 fixedly connected to the closing interlock plate 11 is provided on the upper portion thereof, and a baffle head 13 that can protrude from the topmost side of the circuit breaker cabinet 16 is provided on the upper portion of the interlocking baffle 12. Above the area of ​​the circuit breaker cabinet 16 adjacent to the baffle head 13, a three-position mechanism 20 that can switch between the closing state, the opening state, and the isolation state is arranged. Here, in order to achieve the switching between the above three states, the three-position interlocking drive plate 22 located between the paired fixed brackets 21A and 21B in this three-position mechanism 20 can be moved relative to the circuit breaker cabinet 16 below along the direction of the circuit breaker cabinet 16 under the action of an external force (for example, by means of an operator's actuation or an internal electrical operating mechanism). Figure 2 The left and right directions shown in ( Figure 1 The three-station mechanism 20 moves in a direction perpendicular to the paper surface), thereby realizing the gear switching of the three-station mechanism 20 between its three states.

[0051] Here, the baffle head 13 is located in the movement path of the interlocking baffle 12, so that the controlled movement of the interlocking baffle 12 can be achieved. That is, when the baffle head 13 is raised to a height that abuts against the interlocking baffle 12 (such as Figure 1 As shown, when the closing interlocking arm 10A is in the first position (which makes the circuit breaker in the closed state), it blocks the interlocking baffle 12 from switching gears, thereby achieving the functional requirement that the three-position mechanism 20 cannot be operated when the circuit breaker mechanism 10 is closed. On the contrary, when the baffle head 13 falls to a height where it does not abut against the interlocking baffle 12 (as shown in FIG. Figure 3As shown, when the closing interlocking arm 10A is in the second position (which puts the circuit breaker in the open state), it releases the stop on the movement of the interlocking baffle 12 to switch the gears, thereby achieving the functional requirement of being able to move the three-position interlocking drive plate 22 left and right and then operate the three-position mechanism 20 when the circuit breaker mechanism 10 is open.

[0052] On the side of the three-station interlocking drive plate 22 opposite to the baffle head 13, an interlocking drive roller 23 fixedly connected to the three-station interlocking drive plate 22 is provided. Figure 2 As shown, the interlock drive roller 23 includes a pair of rollers rotatably connected to a mounting plate fixedly connected to the three-position interlock drive plate 22, thereby moving therewith. An interlock cover 33, for example, in the shape of a circular plate, is provided along the motion path of the interlock drive roller 23 and is operatively connected thereto. An interlock rod 33B, extending downward into the circuit breaker cabinet 16, is provided on the side of the interlock rod 33 facing away from the interlock drive roller 23. A return spring 33A, sleeved on the outer side of the interlock rod 33B, is used to bias the interlock cover 33 toward the interlock drive roller 23, thereby causing the two to engage. Consequently, when the interlock drive roller 33 moves left and right with the three-position interlock drive plate 22, it can move above the interlock cover 33, thereby overcoming the elastic force of the return spring 33A and depressing it relative to the circuit breaker cabinet 16. When the interlock driving roller 33 slides away from the interlock cover 33 , the return spring 33A biases the interlock cover 33 upward to return it to a raised position relative to the circuit breaker cabinet 16 .

[0053] Here, the interlocking device also includes a closing locking plate 31 located below the interlocking rod 33B of the interlocking cover 33 and capable of being operatively connected to the baffle retaining portion 15 designed as a recessed portion on the upper portion of the closing interlocking plate 11. The closing locking plate 31 can be installed inside the circuit breaker cabinet 16 together with the circuit breaker mechanism 10 and located above it. Here, the closing locking plate 31 is designed to be controlled and engaged with the closing interlocking plate 11 so as to be in a closed position when the closing interlocking plate 11 is in the closed position. Figure 1 In the raised position shown in FIG, the lifting plate 11 is pushed out to keep it in the raised position to prevent the circuit breaker mechanism 10 from being closed again. Figure 3 The lowered position is shown pivotally unlocked so as not to interfere with operation of the circuit breaker mechanism 10 .

[0054] Specifically, if Figure 1As shown, the closing locking plate 31 is arranged approximately perpendicular to the closing interlock plate 11, and the closing locking plate 31 may be provided with a circular hole adjacent to the closing interlock plate 11 and a limiting hole, such as an arc-shaped hole, approximately located in the middle thereof, so as to be mounted to the circuit breaker cabinet 16 via a pivot portion 31A passing through the arc-shaped hole, thereby allowing the closing locking plate 31 to pivot relative to the circuit breaker cabinet 16 about the pivot portion 31A and be limited by the pressing portion 31B located behind the pivot portion 31A.

[0055] At the same time, if Figure 1 and 3 As shown, a stopper 31C is formed on the side of the closing lock plate 31 facing the closing button plate 32 located below it, that is, on the lower side. Correspondingly, a stopper 32A is formed on the upper side of the closing button plate 32 to cooperate with the stopper 31C to prevent the closing button plate 32 slidably mounted on the circuit breaker cabinet 16 from moving relative to the circuit breaker cabinet 16. Figure 1 When the stopper 31C of the closing lock plate 31 and the stopper 32A of the closing button plate 32 are unlocked, the closing button plate 32 can slide under the action of external force, thereby allowing the closing operation of the circuit breaker operating mechanism.

[0056] exist Figure 3-4 FIG. 2 shows how the interlocking device of the present invention prevents the circuit breaker mechanism 10 from performing a closing operation during the operation of the three-position mechanism 20 .

[0057] Specifically, when the three-position interlock drive plate 22 in the three-position mechanism 20 moves to achieve gear switching, the interlock drive roller 23 presses down the interlock cover 33 and overcomes the elastic force of the return spring 33A to press the interlock rod 33B relative to the circuit breaker cabinet 16 until it contacts the pressing portion 31B of the closing lock plate 31. As a result, the closing lock plate 31 is released. Figure 3 The position shown in FIG is pivoted clockwise about the pivot portion 31A relative to the circuit breaker cabinet 16 to Figure 4 The breaker mechanism 10 is positioned approximately horizontally and maintained in this position, so that the protruding stopper 31C on its lower side abuts the corresponding stopper 32A on the upper side of the closing button plate 32. This prevents the closing button plate 32, which is slidably mounted to the circuit breaker cabinet 16, from locking relative to the circuit breaker cabinet 16. At this point, the closing button plate 32 cannot be pressed, thereby locking the circuit breaker 202. This ensures that the three-position mechanism 20 can be operated while the circuit breaker mechanism 10 is open, and ensures that the circuit breaker mechanism 10 cannot be closed while the three-position mechanism 20 is being operated, thus preventing misoperation and improving safety.

[0058] Next, combine Figures 1 to 5The working process of the interlocking device between the three-position mechanism and the circuit breaker mechanism of the present invention is described in detail.

[0059] In specific use, in the initial state, the three-station interlocking drive plate 22 in the three-station mechanism 20 is located at an intermediate position between the grounding position and the isolation position. Figure 4 As shown, when the circuit breaker mechanism 10 needs to be closed, the main shaft 10B rotates and drives the closing interlock arm 10A to the first position for closing the circuit breaker mechanism 10. At this time, the closing interlock arm 10A drives the closing interlock plate 11 to push the interlock baffle 12 upward, so that the baffle head 13 on the upper part of the interlock baffle 12 contacts the three-position interlock drive plate 22. At this time, the three-position interlock drive plate 22 can no longer move freely left and right, making it impossible to perform gear switching operation on the three-position mechanism 20.

[0060] When the three-station mechanism 20 needs to be operated, Figure 3 and 5 As shown, first rotate the main shaft 10B and drive the closing interlock arm 10A to the second position to open the circuit breaker mechanism 10. At this time, the closing interlock plate 11 moves downward with the help of the reset spring 14 and separates the baffle head 13 from the three-position interlock drive plate 22 to release the lock. Move the three-position interlock drive plate 22 to place the three-position mechanism 20 in the grounding position or the isolation position. During the movement of the three-position interlock drive plate 22, the interlock drive roller 23 is driven to interact with the interlock cover 33 and press the interlock rod 33B downward, so that the interlock rod 33B moves downward to the extent of the pressing part 31B of the closing lock plate 31. When the interlock rod 33B moves downward, it drives the closing lock plate 31 to rotate clockwise to Figure 1 The substantially horizontal position shown in FIG. 1 is shown in FIG. 2 , at which time the closing locking plate 31 is moved from Figure 3 The closing button plate 32 is rotated from a position separated from the stop portion 32A in the closing button plate 32 to a position abutting against the stop portion 32A of the closing button plate 32, thereby locking the closing button plate 32 to avoid misoperation resulting in closing of the circuit breaker mechanism 10.

[0061] After the operation of the three-position mechanism 20 is completed, the three-position interlock drive plate 22 is moved again to the middle position between the grounding position and the isolation position. At this time, the interlock cover 33 is reset to the interlock rod 33B under the action of the reset spring 33A. Figure 3 The closing interlock plate 11 moves downward under the action of the reset spring 14 and drives the closing interlock plate 31 in contact with it to move from the raised position shown in FIG. Figure 1 Pivot counterclockwise to the horizontal position in Figure 3At this time, the stop portion 31C rotates counterclockwise to a state where it is separated from the stop portion 32A of the closing button plate 32 to release the lock on it. At this time, the closing button plate 32 can be operated normally to achieve the closing of the circuit breaker mechanism 10.

[0062] exist Figure 5-7 A modified embodiment of the present invention is shown in FIG. Figures 1 to 4 The mechanism shown in is the same, the difference is that the interlocking drive roller 23 with a paired roller design is changed to a design with only a single interlocking drive cam 23A. In order to ensure that the interlocking drive cam 23A can have substantially the same movement mode or path as the interlocking drive roller 23, a guide groove for guiding it can be added to the three-station interlocking drive plate 22, wherein under the guidance of the guide groove, the single interlocking drive cam 23A can also interact with the interlocking cover 33 and press the interlocking rod 33B downward during the left and right movement of the three-station interlocking drive plate 22, so that the interlocking rod 33B moves downward to the extent of contacting the pressing portion 31B of the closing locking plate 31. When the interlocking rod 33B moves downward, it drives the closing locking plate 31 to rotate clockwise to Figure 1 At this time, the closing locking plate 31 rotates from a position separated from the stop portion 32A in the closing button plate 32 to a position abutting against the stop portion 32 of the closing button plate 32, thereby locking the closing button plate 32 to avoid erroneous operation that causes the circuit breaker mechanism 10 to be closed.

[0063] The interlocking device of the circuit breaker mechanism 10 and the three-position mechanism 20 and the switch cabinet in the above embodiment have at least the following advantages:

[0064] 1) All components in the interlocking device are rigidly designed. These components are reliably joined and are not easily deformed during long-term use. This allows for a rigid interlock between the three-position mechanism 20 and the circuit breaker mechanism 10. This effectively improves the service life and reliability of the interlocking device while achieving interlocking between the three-position mechanism 20 and the circuit breaker mechanism 10.

[0065] 2) The interlocking device of the present application has a simple structure and a small number of parts. This not only facilitates operation and maintenance, but also effectively avoids interlocking device failure due to damage to the connection structure, further improving the reliability of the interlocking device at a lower manufacturing and assembly cost.

[0066] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0067] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. An interlocking device between a three-position mechanism and a circuit breaker mechanism, which is installed on the cabinet body of a switch cabinet and is used to interlock the three-position mechanism with the circuit breaker mechanism, and is characterized by: The interlocking device comprises: A three-position interlock drive plate provided in the three-position mechanism, designed to be controllably movable relative to the circuit breaker cabinet to switch between the grounding position and the isolation position of the three-position switch, wherein the three-position interlock drive plate has an interlock drive roller or an interlock drive cam operatively connected thereto; An interlock cover capable of being operatively connected to an interlock drive roller or an interlock drive cam, and having an interlock rod extending into the circuit breaker cabinet; An interlocking baffle, the upper portion of which is provided with a baffle head capable of being operatively connected to a three-position interlocking drive plate; a main shaft operatively connected to a circuit breaker mechanism disposed within the circuit breaker cabinet, and having a closing interlocking crank arm sleeved thereon and capable of rotating therewith, wherein the closing interlocking crank arm is capable of switching between a first position for closing the circuit breaker mechanism and a second position for opening the circuit breaker mechanism; When the closing interlocking crank arm is in the first position, the closing interlocking crank arm actuates the interlocking baffle so that the interlocking baffle locks the three-position interlocking drive plate through its baffle head; when the closing interlocking crank arm is in the second position, the closing interlocking crank arm releases the actuation of the interlocking baffle to allow the three-position interlocking drive plate to move in a controlled manner and cause the interlocking drive roller or the interlocking drive cam to press down the interlocking rod, wherein when the interlocking rod is pressed down, the closing locking plate of the interlocking device is stopped to lock the closing button plate of the interlocking device.

2. The interlocking device between the three-position mechanism and the circuit breaker mechanism according to claim 1 is characterized in that: The interlocking drive rollers include a pair of rollers, and the pair of rollers are rotatably connected to a mounting plate fixedly connected to the three-station interlocking drive plate.

3. The interlocking device between the three-position mechanism and the circuit breaker mechanism according to claim 1 is characterized in that: The interlocking drive cam comprises a single cam that can be operatively connected to the interlocking cover, wherein the three-station interlocking drive plate is provided with a guide groove for guiding the single cam.

4. The interlocking device between the three-position mechanism and the circuit breaker mechanism according to claim 1 is characterized in that: The closing locking plate is designed to be arranged approximately perpendicular to the closing interlock plate, and is rotatably mounted to the circuit breaker cabinet via a pivot portion approximately located in the middle. It also includes a pressing portion located behind the pivot portion that can be operatively connected to the interlock rod of the interlock cover extending into the circuit breaker cabinet.

5. The interlocking device between the three-position mechanism and the circuit breaker mechanism according to claim 4 is characterized in that: The closing locking plate is located above the closing button plate and has a stop portion protruding toward the closing button plate. The closing button plate has a stop portion that can be operatively connected to the stop portion, thereby stopping the closing locking plate of the interlocking device when the interlocking rod is pressed down to actuate the closing locking plate.

6. The interlocking device between the three-position mechanism and the circuit breaker mechanism according to claim 4, characterized in that: A baffle locking portion is provided on the upper portion of the closing interlock plate, wherein the closing locking plate is designed to be able to engage with the baffle locking portion to lock the closing interlock plate when it is operatively connected to the interlock rod of the interlock cover extending into the circuit breaker cabinet.

7. The interlocking device between the three-position mechanism and the circuit breaker mechanism according to claim 4, characterized in that: The closing interlock plate is designed to be elongated and extended along the height direction of the circuit breaker cabinet and is provided with a plurality of narrow guide grooves along its own length direction, wherein the guide grooves are provided with guide protrusions extending from the wall of the circuit breaker cabinet and capable of abutting against the guide protrusions.

8. The interlocking device between the three-position mechanism and the circuit breaker mechanism according to claim 7, characterized in that: It also includes a reset tension spring located at the lower part of the closing interlock plate, which is designed to apply an elastic force to the closing interlock plate toward the closing interlock crank arm so that the closing interlock plate and the closing interlock crank arm located below it remain in close contact.

9. The interlocking device between the three-position mechanism and the circuit breaker mechanism according to claim 1, characterized in that: The three-station mechanism further includes fixed brackets arranged in pairs, and the three-station interlocking drive plate is located between the fixed brackets arranged in pairs.

10. A switch cabinet, characterized in that: It includes a circuit breaker cabinet, a circuit breaker mechanism installed on the circuit breaker cabinet, a three-position mechanism located above the circuit breaker cabinet, and an interlocking device between the three-position mechanism and the circuit breaker mechanism according to any one of claims 1 to 9, wherein the interlocking device between the three-position mechanism and the circuit breaker mechanism is installed on the cabinet and is operatively connected to the circuit breaker mechanism and the three-position mechanism.

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