CN114864312A - Interlocking device of circuit breaker and three-station disconnecting switch and switch equipment - Google Patents

Abstract

The invention relates to an interlocking device of a circuit breaker and a three-station disconnecting switch and a switch device, wherein the interlocking device comprises: an operating member controlled to move to switch between a ground gear and an isolation gear; the first connecting component is rotatably connected with the operating part; the second connecting assembly is movably connected with the first connecting assembly; the crank arm is controlled to rotate relative to the second connecting component so as to switch between a first position and a second position; when the crank arm is located at the first position, the second connecting component locks the operating part through the first connecting component, and when the crank arm is located at the second position, the operating part is controlled to move and drives the first connecting component to rotate, so that the second connecting component is controlled to lock the switch-on button. This application realizes the flexonics between operating parts and the connecting lever through first coupling assembling and second coupling assembling, realizes the flexonics between three station isolator and the circuit breaker promptly, and not only the structure is simpler, and the dependable performance can protect interlock inner structure moreover, improves work efficiency.

Description

Interlocking device of circuit breaker and three-station disconnecting switch and switch equipment

Technical Field

The invention relates to the technical field of mechanical interlocking devices, in particular to an interlocking device of a circuit breaker and a three-position disconnecting switch and switch equipment.

Background

With the development of the power industry, the application of the gas-filled cabinet is more mature, and the requirement on the interlocking is higher and higher. The three-station isolating switch has obvious disconnection points, can realize an isolating function and a grounding function, and is mainly used for equipment maintenance. However, the three-position isolating switch does not have a breaking function, cannot be switched on and off with a load, and can be switched on and off only under the condition that the load is disconnected. The breaker can normally switch on and off and break load, and is used for controlling equipment. However, the circuit breaker has no obvious disconnection point, can not visually judge whether the circuit is disconnected or not, and is not suitable for equipment maintenance.

Therefore, in order to achieve the purposes of breaking a circuit with load, enabling the circuit to have an obvious breaking point and facilitating overhaul and maintenance, a mechanical interlocking device is usually arranged between a three-position disconnecting switch and a circuit breaker to realize interlocking operation of the three-position disconnecting switch and the circuit breaker.

However, the existing mechanical interlocking device is usually set to be a rigid connection structure, that is, rigid connection is adopted between the three-position disconnecting switch and the circuit breaker, the structure is complex, the use is inconvenient, and the internal structure of the mechanical interlocking device is damaged easily due to improper operation, so that the mechanical interlocking device cannot work normally.

Disclosure of Invention

Therefore, it is necessary to provide an interlocking device of a circuit breaker and a three-position disconnecting switch and a switch device, which have simple structure and reliable performance, aiming at the problems of complicated structure, inconvenient use and insensitive mechanical action of the existing mechanical interlocking device.

In a first aspect, the present application provides an interlock for a circuit breaker and a three-position disconnector, comprising:

the operating piece is arranged on the three-station isolating switch and can be controlled to move so as to switch between a grounding gear and an isolating gear of the three-station isolating switch;

the first connecting component is rotatably connected with the operating part;

the second connecting assembly is arranged in the circuit breaker and movably connected with the first connecting assembly; and

the crank arm is controlled to rotate relative to the second connecting component so as to switch between a first position enabling the circuit breaker to be switched on and a second position enabling the circuit breaker to be switched off;

work as the turning arm is located during the first position, the turning arm with second coupling assembling links to each other, so that second coupling assembling passes through first coupling assembling locking operating parts works as the turning arm is located during the second position, the turning arm with second coupling assembling separation, so that operating parts controlled removal drives first coupling assembling rotates, control when first coupling assembling rotates second coupling assembling locking the closing button of circuit breaker.

In some embodiments, the first connecting assembly includes a connecting shaft and a pressing plate, one end of the connecting shaft is rotatably connected to the operating element, the other end of the connecting shaft is connected to the pressing plate, the pressing plate is perpendicular to the axial direction of the connecting shaft, and the pressing plate is movably connected to the second connecting assembly.

In some embodiments, the first connecting assembly further includes a roller rotatably connected to the pressing plate, and the pressing plate is movably connected to the second connecting assembly through the roller.

In some embodiments, the second connection assembly includes an interlocking plate and a blocking plate, the interlocking plate is movably disposed inside the circuit breaker and located on a rotation path of the connecting lever, one end of the interlocking plate is in contact connection with the first connection assembly, and the other end of the interlocking plate is in rotational connection with the blocking plate, and the interlocking plate can move under an abutting force of the first connection assembly and drive the blocking plate to rotate so as to lock the closing button.

In some embodiments, the interlocking plate is provided with an accommodating opening for accommodating the crank arm, when the crank arm is located at the first position, the crank arm abuts against an inner wall of the accommodating opening to lock the interlocking plate, and when the crank arm is located at the second position, the crank arm is separated from the inner wall of the accommodating opening to unlock the interlocking plate.

In some embodiments, the interlocking plate is further provided with a connecting hole, the connecting hole extends along the moving direction of the interlocking plate, and a plug pin on the circuit breaker can be inserted into the connecting hole.

In some embodiments, the blocking plate has a connecting end and a free end, the connecting end is rotatably connected to the interlocking plate, the free end can be connected to or separated from the closing button, and when the free end is connected to the closing button, the free end is in clamping fit with the closing button to lock the closing button.

In some embodiments, the second connecting assembly includes a reset member connected between the interlock plate and the blocking plate to provide a force to restore the blocking plate from locking the closing button position to unlocking the closing button position.

In some embodiments, the reset member comprises a reset torsion spring.

In a second aspect, the present application provides a switchgear, including three-position isolator, circuit breaker and as above the interlock of circuit breaker and three-position isolator, the circuit breaker with three-position isolator's interlock connect in three-position isolator with between the circuit breaker.

Above-mentioned interlock and switchgear of circuit breaker and three-station isolator, first coupling assembling rotates with the operating parts to be connected, and with second coupling assembling swing joint, second coupling assembling again with connecting lever swing joint, therefore, realize the flexonics between operating parts and the connecting lever through first coupling assembling and second coupling assembling, realize the flexonics between three-station isolator and the circuit breaker promptly, compare the rigid connection in current interlock, not only the structure is simpler, the dependable performance, and can protect interlock inner structure, and the work efficiency is improved.

Drawings

FIG. 1 is a schematic view of the overall structure of an interlock device according to an embodiment of the present application;

FIG. 2 is a schematic structural view of the interlock device shown in FIG. 1;

FIG. 3 is a schematic view of the operating member of the interlock device of FIG. 1;

FIG. 4 is a schematic structural view of a first coupling assembly of the interlock device of FIG. 1;

FIG. 5 is a schematic view of the interlock plate of the interlock device of FIG. 1;

in the figure: 100. an interlock device; 201. a three-position isolating switch; 202. a circuit breaker; 203. a closing button; 204. a main shaft; 10. an operating member; 20. a first connection assembly; 30. a second connection assembly; 40. a crank arm; 11. positioning the notch; 21. a connecting shaft; 22. pressing a plate; 23. a roller; 31. an interlock plate; 32. a baffle plate; 33. a reset member; 311. an accommodating port; 312. connecting holes; 321. a connecting end; 322. a free end.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Fig. 1 and 2 are schematic structural views of an interlock device according to an embodiment of the present invention. For the purpose of illustration, the drawings show only the structures associated with embodiments of the invention.

Referring to fig. 1 and 2, an embodiment of the present invention provides an interlock apparatus 100 for a circuit breaker and a three-position disconnecting switch, including an operating member 10, a first connecting assembly 20, a second connecting assembly 30, and a connecting lever 40. The operating element 10 is disposed on the three-position disconnecting switch 201 and can be controlled to move so as to switch between a grounding gear and an isolating gear of the three-position disconnecting switch 201. The first connecting assembly 20 is rotatably connected to the operating member 10, and the second connecting assembly 30 is disposed inside the circuit breaker 202 and movably connected to the first connecting assembly 20. The crank arm 40 is controlled to rotate relative to the second connecting assembly 30 to switch between a first position for closing the circuit breaker 202 and a second position for opening the circuit breaker 202.

When the crank arm 40 is in the first position, the crank arm 40 is connected to the second connecting member 30 so that the second connecting member 30 locks the operating member 10 via the first connecting member 20. When the crank arm 40 is located at the second position, the crank arm 40 is separated from the second connecting assembly 30, so that the operating element 10 is controlled to move and drive the first connecting assembly 20 to rotate, and when the first connecting assembly 20 rotates, the second connecting assembly 30 is controlled to lock or unlock the closing button 203 of the circuit breaker 202.

It should be noted that the operating member 10 is used to shift the ground gear position and the isolation gear position by an external force. Therefore, the operating element 10 may be provided as an operation panel or an operation shaft or the like for easy operation. For convenience of description, the present embodiment is described by taking an operation panel as an example.

FIG. 3 is a schematic structural diagram of an operating device according to an embodiment of the present invention. Referring to fig. 3, specifically, one end of the operating element 10 is provided with a positioning notch 11, and the positioning notch 11 is in snap fit with the gear shift lever on the three-position disconnecting switch 201. Therefore, when the operating element 10 is moved, the grounding gear and the isolation gear of the three-position isolating switch 201 can be synchronously switched.

The other end of the operating member 10 is rotatably connected to the first coupling member 20, and when an external force is applied to the operating member 10 to move it between the ground engaging position and the disengaging position, the linear motion of the operating member 10 is converted into a rotational motion of the first coupling member 20 through the rotational connection.

Referring to fig. 1 and 2 again, the connecting lever 40 is used for operating the opening and closing of the circuit breaker 202, and in addition, the connecting lever 40 can connect the opening and closing of the circuit breaker 202 to the second connecting component 30 and the first connecting component 20, and the operation element 10 is locked by the second connecting component 30 and the first connecting component 20, that is, the three-position disconnecting switch 201 can be locked.

To facilitate handling of the crank arm 40, the crank arm 40 may be disposed on the main shaft 204 of the circuit breaker 202. The main shaft 204 can rotate under the action of external force, and the opening and closing of the circuit breaker 202 are realized in the rotating process. The crank arm 40 has a first position for closing the breaker 202 and a second position for opening the breaker 202 while rotating along with the main shaft 204, and thus, the crank arm 40 can be switched between the first position and the second position by rotating the main shaft 204.

In particular, in the present embodiment, the operation panel is disposed in a horizontal direction, and since the main shaft 204 of the circuit breaker 202 is generally disposed horizontally, the second connecting assembly 30 is disposed inside the circuit breaker 202 in a vertical direction, so that the crank arm 40 on the main shaft 204 is connected to or separated from the second connecting assembly 30.

When the crank arm 40 is located at the first position, the crank arm 40 upwardly props the second connecting assembly 30, so that the second connecting assembly 30 upwardly props the first connecting assembly 20, and thus the first connecting assembly 20 cannot rotate. Thus, the first coupling component 20 can achieve a locking of the operating member 10, i.e. the operating member 10 cannot be moved, so that it cannot be switched between the grounding gear position and the isolation gear position. At this time, the purpose that the three-position disconnecting switch 201 cannot be operated in the closing process of the circuit breaker 202 is achieved.

When the crank arm 40 is located at the second position, the crank arm 40 is rotated downward by a certain angle and separated from the second connecting member 30. At this time, when the operating element 10 is moved to switch between the ground engaging position and the isolating position, the operating element 10 moves a certain distance in the horizontal direction, and drives the first connecting assembly 20 to rotate. Therefore, the first connecting assembly 20 applies a downward pressure to the second connecting assembly 30, and the second connecting assembly 30 moves downward under the pressure, so that the second connecting assembly 30 is connected with the closing button 203 of the circuit breaker 202, and the closing button 203 of the circuit breaker 202 is locked. At this time, the closing button 203 cannot be pressed, and the circuit breaker 202 is locked. Therefore, the purpose that the three-position isolating switch 201 can be operated in the opening process of the circuit breaker 202 is achieved, the circuit breaker 202 cannot be switched on when the three-position isolating switch 201 is operated, misoperation is avoided, and safety is improved.

Fig. 4 shows a schematic structural diagram of a first connection assembly in an embodiment of the invention. As shown in fig. 4, in some embodiments, the first connecting assembly 20 includes a connecting shaft 21 and a pressing plate 22, the connecting shaft 21 is rotatably connected to the operating element 10 at one end, the pressing plate 22 is connected to the other end, the pressing plate 22 is perpendicular to the axial direction of the connecting shaft 21, and the pressing plate 22 is movably connected to the second connecting assembly 30.

Specifically, the connecting shaft 21 is Z-shaped, one end of which is rotatably connected to the operating element 10, and the other end of which is welded to the pressing plate 22. The pressing plate 22 is perpendicular to the axial direction of the connecting shaft 21 and is connected in contact with the second connecting assembly 30. When the connecting shaft 21 is not rotated, the pressing plate 22 is in contact with the second connecting assembly 30, and no interaction force exists between the two. When the connecting shaft 21 is driven by the operating element 10 to rotate, the pressing plate 22 rotates along with the connecting shaft 21 and presses the second connecting assembly 30 downward, so that the second connecting assembly 30 moves downward, and the closing button 203 of the circuit breaker 202 is locked.

Further, the second connecting assembly 30 is disposed inside the circuit breaker 202, and the connecting shaft 21 and the pressing plate 22 are disposed outside the circuit breaker 202, so as to facilitate connection between the second connecting assembly 30 and the pressing plate 22, a connecting port is formed on a housing of the circuit breaker 202, the connecting shaft 21 is disposed on an outer surface of the housing of the circuit breaker 202, and the pressing plate 22 can enter and exit the circuit breaker 202 through the connecting port in a rotating process and can be abutted against the second connecting assembly 30.

In addition, the connecting shaft 21 is fixed on the outer surface of the casing of the circuit breaker 202 through a fixing block, so that the operation element 10 is prevented from driving the connecting shaft 21 to move when moving, and the connecting shaft 21 cannot rotate.

In some embodiments, the first connecting assembly 20 further includes a roller 23, the roller 23 is rotatably connected to the pressing plate 22, and the pressing plate 22 is movably connected to the second connecting assembly 30 through the roller 23.

Specifically, the rollers 23 are oppositely arranged at two ends of the pressing plate 22, and through the arrangement of the rollers 23, when the pressing plate 22 and the second connecting assembly 30 move relatively, the sliding action between the pressing plate 22 and the second connecting assembly 30 can be converted into the rolling action, so that the process that the pressing plate 22 drives the second connecting assembly 30 to move is smoother.

Referring again to fig. 1 and 2, in some embodiments, the second connecting assembly 30 includes an interlocking plate 31 and a blocking plate 32, and the interlocking plate 31 is movably disposed inside the circuit breaker 202 and located on the rotation path of the crank arm 40. The interlocking plate 31 has one end in contact with the first coupling member 20 and the other end in rotational connection with the shutter 32. The interlock plate 31 can move by the abutting force of the first connecting member 20 and rotate the shutter 32 to lock the closing button 203.

Specifically, in the present embodiment, the interlocking plate 31 is disposed inside the circuit breaker 202 in a vertically extending manner, and has one end in contact with the roller 23 on the pressing plate 22 and the other end in rotational connection with the blocking plate 32. When the crank arm 40 is located at the first position, the crank arm 40 supports the interlocking plate 31 upward, so that the interlocking plate 31 abuts against the pressing plate 22, the pressing plate 22 cannot rotate, the operating element 10 cannot move, and the gear switching operation of the three-position disconnecting switch 201 cannot be realized.

When the crank arm 40 is located at the second position, the crank arm 40 rotates downward and is separated from the interlock plate 31. At this time, the operating member 10 can be moved by an external force to switch between the ground engaging range and the disengaging range. When the operating element 10 moves, the connecting shaft 21 is driven to rotate, and the pressing plate 22 rotates along with the connecting shaft 21 and presses the interlocking plate 31 downwards. Interlocking plate 31 moves downward under pressure, causing flapper 32 to rotate. After the rotation of the shutter 32, the position separated from the closing button 203 is changed to the position connected to the closing button 203, so that the closing button 203 is locked, and it is ensured that the circuit breaker 202 cannot be closed at this time.

Fig. 5 shows a schematic view of the interlocking plate in an embodiment of the present invention. With reference to fig. 1 and 5, the interlock plate 31 is further opened with an accommodating hole 311 for accommodating the crank arm 40, and when the crank arm 40 is located at the first position, the crank arm 40 abuts against an inner wall of the accommodating hole 311 to lock the interlock plate 31. When the crank arm 40 is located at the second position, the crank arm 40 is separated from the inner wall of the receiving hole 311 to unlock the interlock plate 31.

Since the crank arm 40 needs to be rotated up and down by a certain angle in the process of following the rotation of the spindle 204, the crank arm 40 is received in the receiving opening 311 in order to connect and disconnect the crank arm 40 to and from the interlock plate 31 in the process of rotating the crank arm 40. When the crank arm 40 is located at the first position, the crank arm 40 is upwardly brought into contact with the upper inner wall of the receiving opening 311 and upwardly supports the interlock plate 31. When the crank arm 40 is located at the second position, the crank arm 40 rotates downward by a certain angle, and although the crank arm 40 is still located in the accommodating port 311, the inner walls of the crank arm 40 and the accommodating port 311 are in a separated state, the crank arm 40 and the interlocking plate 31 are not affected by each other, and gear switching of the three-position disconnecting switch 201 can be realized through the operating element 10.

The above structure not only can realize the connection between the crank arm 40 and the interlocking plate 31, but also can reduce the installation space of the interlocking device in the circuit breaker 202 and improve the utilization rate of the internal space of the circuit breaker 202.

In some embodiments, the interlocking plate 31 is further opened with a connection hole 312, and the connection hole 312 extends along the moving direction of the interlocking plate 31 and is used for inserting a latch on the circuit breaker 202.

Specifically, the connection hole 312 is extended in the vertical direction and opened on the interlocking plate 31, the plug pin inside the circuit breaker 202 is inserted into the connection hole 312, and the interlocking plate 31 can be movably arranged inside the circuit breaker 202 in the vertical direction by the relative movement of the plug pin and the connection hole 312.

It is understood that in some other embodiments, the interlocking plate 31 may be movably disposed inside the circuit breaker 202 through other structures, for example, the interlocking plate 31 is moved through the cooperation of the sliding rail and the sliding block, which is not described herein.

Referring again to fig. 2, in some embodiments, the blocking plate 32 has a connecting end 321 and a free end 322, the connecting end 321 is rotatably connected to the interlocking plate 31, the free end 322 can be connected to or disconnected from the closing button 203, and when the free end 322 is connected to the closing button 203, the free end 322 is snap-fitted with the closing button 203 to lock the closing button 203.

Specifically, the connection end 321 of the blocking plate 32 is rotatably disposed on the interlocking plate 31 through a rotation shaft, and when the interlocking plate 31 moves in the vertical direction, the blocking plate 32 is driven to rotate in the vertical plane.

In addition, when the crank arm 40 is located at the second position, the operating member 10 is moved and the pressing plate 22 is rotated, and the pressing plate 22 presses the interlocking plate 31 downward to move the interlocking plate 31 downward. Therefore, the interlocking plate 31 drives the baffle 32 to rotate clockwise, the baffle 32 rotates from a position separated from the closing button 203 to be clamped on the closing button 203, at the moment, the closing button 203 cannot be pressed due to the blockage of the baffle 32, so that the circuit breaker 202 cannot be closed, and misoperation in the process of operating the three-station isolating switch 201 is avoided.

Referring again to fig. 1, in some embodiments, the second connecting assembly 30 includes a reset member 33, and the reset member 33 is connected between the interlocking plate 31 and the blocking plate 32 to provide a force to restore the blocking plate 32 from the position of the locking closing button 203 to the position of the unlocking closing button 203.

After the operation of the three-position disconnecting switch 201 is completed, the operating element 10 can be manually moved to an intermediate position between the grounding gear and the disconnecting gear, at this time, there is no mutual acting force between the pressing plate 22 and the interlocking plate 31, the interlocking plate 31 and the blocking plate 32 can be restored to the original positions through the action of the resetting element 33, that is, the interlocking plate 31 moves upwards and is in contact connection with the pressing plate 22, and the blocking plate 32 rotates counterclockwise by a certain angle to be separated from the closing button 203. At this time, the closing button 203 can be operated to close the circuit breaker 202.

In some embodiments, the reset member 33 comprises a reset torsion spring. Specifically, the reset member 33 may be configured as a reset torsion spring, and certainly, may also be configured as other reset structures, which are not described herein.

Based on the interlocking device 100 with the circuit breaker 202 and the three-position disconnecting switch 201, the application provides a switch device which comprises the three-position disconnecting switch 201, the circuit breaker 202 and the interlocking device 100 with the circuit breaker 202 and the three-position disconnecting switch 201. Wherein, the interlocking device 100 of the circuit breaker 202 and the three-position disconnecting switch 201 is connected between the three-position disconnecting switch 201 and the circuit breaker 202.

When the present application is used in particular, in an initial state, the operating element 10 is located at an intermediate position between the ground gear and the isolation gear. At this time, if the circuit breaker 202 needs to be closed, the main shaft 204 is rotated to drive the crank arm 40 to be located at the first position. At this time, the crank arm 40 pushes up the interlock plate 31 to make the interlock plate 31 abut on the pressing plate 22 upward, and at this time, the pressing plate 22 cannot rotate, so that the operating element 10 cannot move, that is, the shift position switching operation of the three-position disconnecting switch 201 cannot be performed.

When the three-position disconnecting switch 201 needs to be operated, the spindle 204 is firstly rotated to enable the crank arm 40 to rotate to the second position, and at the moment, the crank arm 40 is separated from the interlocking plate 31. When the operating member 10 is moved to be in a grounding gear position or an isolating gear position, the operating member 10 drives the connecting shaft 21 to rotate in the moving process, so that the pressing plate 22 is driven to rotate, the pressing plate 22 presses the interlocking plate 31 downwards, and the interlocking plate 31 moves downwards. When the interlocking plate 31 moves downward, the blocking plate 32 is driven to rotate clockwise, and the blocking plate 32 rotates from a position separated from the closing button 203 to a position clamped with the closing button 203, so that the closing button 203 is locked, and the closing circuit breaker 202 is prevented from being operated by mistake.

After the operation of the three-position disconnecting switch 201 is completed, the operating part 10 is moved again to be located at the middle position between the grounding gear and the disconnecting gear, at this time, the pressing plate 22 is in a horizontal state, the interlocking plate 31 moves upwards to be in contact with the pressing plate 22 under the action of the resetting part 33, the baffle 32 rotates anticlockwise to be separated from the closing button 203 under the action of the resetting part 33, at this time, the closing button 203 can be operated normally, and the closing of the circuit breaker 202 is achieved.

The interlocking device 100 and the switchgear of the circuit breaker 202 and the three-position disconnecting switch 201 in the above embodiments have at least the following advantages:

1) the first connecting assembly 20 and the second connecting assembly 30 can realize flexible interlocking between the three-position disconnecting switch 201 and the circuit breaker 202, and on the basis of realizing interlocking between the three-position disconnecting switch 201 and the circuit breaker 202, the interlocking structure is prevented from being damaged due to improper operation, and the practicability of the interlocking device 100 is effectively improved;

2) the interlocking device 100 in the application has a simple structure, is convenient to operate on one hand, can effectively avoid the problem that the interlocking device 100 fails due to the damage of a connecting structure on the other hand, and can improve the reliability of the interlocking device 100.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. The utility model provides a circuit breaker and three station isolator's interlock which characterized in that includes:

the operating piece is arranged on the three-station isolating switch and can be controlled to move so as to switch between a grounding gear and an isolating gear of the three-station isolating switch;

the first connecting component is rotatably connected with the operating part;

the second connecting assembly is arranged in the circuit breaker and movably connected with the first connecting assembly; and

the crank arm is controlled to rotate relative to the second connecting assembly so as to switch between a first position enabling the circuit breaker to be switched on and a second position enabling the circuit breaker to be switched off;

work as the turning arm is located during the first position, the turning arm with second coupling assembling links to each other, so that second coupling assembling passes through first coupling assembling locking operating parts works as the turning arm is located during the second position, the turning arm with second coupling assembling separation, so that operating parts controlled removal drives first coupling assembling rotates, control when first coupling assembling rotates second coupling assembling locking the closing button of circuit breaker.

2. The interlocking device of the circuit breaker and the three-position disconnecting switch according to claim 1, wherein the first connecting assembly comprises a connecting shaft and a pressing plate, one end of the connecting shaft is rotatably connected with the operating part, the other end of the connecting shaft is connected with the pressing plate, the pressing plate is perpendicular to the axial direction of the connecting shaft, and the pressing plate is movably connected with the second connecting assembly.

3. The interlock of claim 2, wherein the first linkage assembly further comprises a roller rotatably connected to the pressure plate, and the pressure plate is movably connected to the second linkage assembly via the roller.

4. The interlocking device of the circuit breaker and the three-position disconnecting switch according to claim 1, wherein the second connecting assembly comprises an interlocking plate and a baffle plate, the interlocking plate is movably arranged inside the circuit breaker and located on a rotating path of the connecting lever, one end of the interlocking plate is in contact connection with the first connecting assembly, the other end of the interlocking plate is in rotating connection with the baffle plate, and the interlocking plate can move under the abutting force of the first connecting assembly and drive the baffle plate to rotate so as to lock the closing button.

5. The interlock device of claim 4, wherein the interlock plate has an opening for receiving the crank arm, the crank arm abuts against an inner wall of the opening to lock the interlock plate when the crank arm is in the first position, and the crank arm is separated from the inner wall of the opening to unlock the interlock plate when the crank arm is in the second position.

6. The interlock device of claim 5, wherein the interlock plate further comprises a connection hole extending along a moving direction of the interlock plate and allowing a plug of the circuit breaker to be inserted.

7. The interlocking device of the circuit breaker and the three-position disconnecting switch according to claim 4, wherein the baffle has a connecting end and a free end which are oppositely arranged, the connecting end is rotatably connected with the interlocking plate, the free end can be connected with or separated from the closing button, and when the free end is connected with the closing button, the free end is in clamping fit with the closing button to lock the closing button.

8. The interlock of a circuit breaker and three-position disconnector according to claim 4, wherein the second connection assembly comprises a reset member coupled between the interlock plate and the blocking plate to provide a force to return the blocking plate from locking the closing button position to unlocking the closing button position.

9. The interlock of claim 8 wherein said reset member comprises a reset torsion spring.

10. A switchgear comprising a three-position disconnector, a circuit breaker and an interlock for a circuit breaker and a three-position disconnector according to any of claims 1-9, which is connected between the three-position disconnector and the circuit breaker.

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