Mechanical interlocking device for disconnector and circuit breaker

Abstract

A mechanical interlocking device for an isolating switch and a circuit breaker comprises a baffle assembly, an interlocking mechanism and an interlocking mechanism; the baffle assembly comprises a panel and a movable baffle of the isolating switch, and an operating hole which can be blocked by the movable baffle is arranged on the panel; the interlocking mechanism comprises a crank arm and a first interlocking rod, the crank arm is arranged on a transmission shaft, and the crank arm can cooperate with the first interlocking rod under the drive of the transmission shaft, a second interlocking rod is fixedly arranged on the first interlocking rod, and a locking member is arranged on the second interlocking rod; when the circuit breaker is in an opening state, the first interlocking rod and the crank arm are released from the limited cooperation, the movable baffle is opened and the operating hole is exposed, and the locking member prevents the circuit breaker from closing; when the circuit breaker is in a closing state, the first interlocking rod and the crank arm are limited to cooperate, the movable baffle is closed and blocks the operating hole, and the locking member is unlocked from the closing coil. The present invention is a mechanical structure, and the locking function can be realized even in the absence of electrical interlocking.

Description

Technical Field

[0001] The invention relates to a mechanical interlocking device for high-voltage switch equipment, in particular to a mechanical interlocking device for an isolating switch and a circuit breaker. Background Art

[0002] Gas-insulated switchgear concentrates medium-voltage components such as busbars, circuit breakers, and disconnectors in the box. It is widely used because of its good safety, high reliability, and strong adaptability. As the core components of gas-insulated switchgear, three-position disconnectors and vacuum circuit breakers play an important role in the control, protection, isolation, and grounding functions of the switchgear. A complete interlocking device must be equipped between the three-position disconnector and the circuit breaker to ensure the reliable operation of the electrical equipment. The switchgear with an interlocking mechanism can only operate the three-position disconnector when the circuit breaker is open, and cannot operate the three-position disconnector when the circuit breaker is closed. However, the interlocking device between the three-position disconnector and the circuit breaker of the existing switchgear is imperfect and lacks a mechanical interlocking device. In particular, due to the differences in circuit breakers, the mechanical interlocking structure and connection method between the disconnector and the circuit breaker are quite different, and there is a lack of mechanical interlocking for the circuit breaker. It can only be achieved by electrical interlocking. In this way, in the absence of electrical interlocking protection, misoperation will cause safety accidents due to the lack of mechanical interlocking. Summary of the invention

[0003] The object of the present invention is to overcome the defects of the prior art and provide a mechanical interlocking device for an isolating switch and a circuit breaker which has a simple structure and high reliability.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A mechanical interlocking device for an isolating switch and a circuit breaker, comprising a baffle assembly, an interlocking mechanism and an interlocking mechanism; the baffle assembly comprises a panel and a movable baffle of the isolating switch, an operating hole for inserting an operating handle is arranged on the panel, and the movable baffle is rotatably installed and can expose or cover the operating hole; the interlocking mechanism comprises a crank arm and a first interlocking rod, the crank arm is arranged on a transmission shaft, and the crank arm can be limitedly matched with the first interlocking rod under the drive of the transmission shaft, a second interlocking rod is fixedly arranged on the first interlocking rod, and a locking member for locking a closing coil in the circuit breaker is arranged on the second interlocking rod; the interlocking mechanism connects the movable baffle and the first interlocking rod;

[0006] When the circuit breaker is in the open state, the crank arm releases the limit cooperation with the first interlocking rod, and the movable baffle is pushed to expose the operating hole. At the same time, the movable baffle causes the first interlocking rod to move through the interlocking mechanism, driving the locking piece of the second interlocking rod to lock the closing coil so that the circuit breaker cannot be closed; when the circuit breaker is in the closed state, the crank arm is driven by the transmission shaft to limit the first interlocking rod, and then limits the movable baffle through the interlocking mechanism, so that the movable baffle cannot be pushed to expose the operating hole.

[0007] Furthermore, the movable baffle moves in a circular motion, and the first interlocking rod moves in an axial direction thereof, and the circular rotation of the movable baffle and the axial movement of the first interlocking rod are converted through an interlocking mechanism.

[0008] Further, the interlocking mechanism includes a first connecting plate, a second connecting plate and a connecting shaft, one end of the first connecting plate is rotatably connected to the movable baffle, the other end of the first connecting plate is fixedly installed on one end of the connecting shaft, the other end of the connecting shaft is fixedly connected to one end of the second connecting plate, and the other end of the second connecting plate is rotatably connected to the first interlocking rod.

[0009] Furthermore, an elastic reset mechanism is provided on the first interlocking rod, and the elastic reset mechanism causes the first interlocking rod to move axially in a direction close to the interlocking mechanism. When the movable baffle of the baffle assembly rotates to a position exposing the operating hole, the movable baffle drives the first interlocking rod through the interlocking mechanism to overcome the elastic reset mechanism and move axially in a direction away from the interlocking mechanism. At the same time, the second interlocking rod moves with the movement of the first interlocking rod so that the locking piece abuts against the closing coil to lock the closing coil and prevent the circuit breaker from closing. When the movable baffle of the baffle assembly rotates to a position blocking the operating hole, the elastic reset mechanism drives the first interlocking rod to return to its original position, and the second interlocking rod moves with the movement of the first interlocking rod so that the locking piece releases the lock of the closing coil.

[0010] Furthermore, the elastic reset mechanism includes a guide sleeve and a compression spring, the guide sleeve is fixedly arranged on the circuit breaker, and a guide hole for the first interlocking rod to pass through is provided on two opposite side walls of the guide sleeve, the compression spring is arranged between two opposite side plates of the guide sleeve and sleeved on the first interlocking rod, and a matching portion for deforming the compression spring is provided on the first interlocking rod. Under the joint cooperation of the two opposite side walls of the guide sleeve and the matching portion of the first interlocking rod, the compression spring is deformed to provide a driving force for resetting the first interlocking rod.

[0011] Furthermore, one end of the first interlocking rod can be in contact with the crank arm to achieve limiting cooperation, and the other end of the first interlocking rod is used to be rotatably connected with the interlocking mechanism; the second interlocking rod is vertically fixed on the first interlocking rod, and a locking piece is provided in the middle of the second interlocking rod, and one end of the locking piece is provided as a connecting end with a strip-shaped through-hole for sliding cooperation with the second interlocking rod, and the other end of the locking piece is opposite to the closing coil of the circuit breaker as a locking end, and a support shaft for rotation support is provided between the connecting end and the locking end; the second interlocking rod slides in the through-hole of the locking piece with the movement of the first interlocking rod, and the sliding action of the second linkage rod in the through-hole causes the locking piece to rotate under the action of the support shaft, and causes the locking end to abut against or separate from the closing coil after rotation to achieve locking or unlocking of the closing coil.

[0012] Furthermore, the baffle assembly also includes a support plate, which is arranged opposite to the panel with a gap between them, and the movable baffle is rotatably supported between the support plate and the panel, and an indicating device for indicating the state of the isolating switch is provided on the panel.

[0013] Furthermore, a support portion is protruding from the side of the support plate close to the panel, and the end of the movable baffle away from the interlocking mechanism is rotatably installed on the support portion. A support portion is protruding from the side of the movable baffle close to the panel, and the support portion is supported on the panel. The end of the movable baffle close to the interlocking mechanism is rotatably connected to the interlocking mechanism.

[0014] Furthermore, the interlocking mechanism also includes a fixed block and a guide plate, the fixed block is used to fix the first interlocking rod and the second interlocking rod together; the guide plate is arranged between the locking piece and the fixed block, one end of the guide plate is fixed to the circuit breaker, and the other end of the guide plate is provided with a strip hole for the second interlocking rod to pass through, and the second interlocking rod can slide in the strip hole.

[0015] Furthermore, the interlocking mechanism also includes a support seat, and connecting ear plates for the connecting shaft to pass through are respectively provided on both sides of the support seat.

[0016] The mechanical interlocking device of the isolating switch and the circuit breaker of the present invention comprises a baffle assembly, an interlocking assembly and an interlocking mechanism to form a linkage mechanism. When the circuit breaker is opened, the crank arm and the first interlocking rod are released from the limit position, and the baffle assembly can expose the operating hole for operating the isolating switch. At the same time, the baffle assembly enables the interlocking mechanism to lock the closing coil of the circuit breaker to prevent the circuit breaker from closing by mistake. When the circuit breaker is closed, the crank arm and the first interlocking rod are limited and matched, and the baffle assembly closes the operating hole and prevents the operating hole from being opened by mistake under the action of the interlocking mechanism. The locking of the isolating switch and the circuit breaker adopts a non-electrically controlled mechanical structure, and both can be locked even in the absence of electrical interlocking. At the same time, an interlocking mechanism that changes the movement mode is provided between the movable baffle and the first interlocking rod, which is conducive to the stability of the movable baffle and the interlocking mechanism when the circuit breaker is closed or opened.

[0017] In addition, an elastic reset mechanism is provided on the first interlocking rod, which can restore the first interlocking rod to its original position and restore the movable baffle from an open state to a closed state after the first interlocking rod and the crank arm release the limit cooperation. The elastic reset mechanism is conducive to timely unlocking of the closing coil.

[0018] In particular, the movement of the first interlocking rod along the axis of the preferred embodiment basically does not occupy the volume of the circuit breaker, and fully utilizes the space of the circuit breaker. The second interlocking rod with the first interlocking rod increases the torque through the rotation of the locking piece. The second interlocking rod itself does not require much moving space. In particular, the locking piece and the second interlocking rod are driven by the strip hole on the locking piece, which not only occupies a small space, but also has high reliability and is easy to install without offset. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the mechanical interlocking device between the isolating switch and the circuit breaker of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the mechanical interlocking device of the isolating switch and the circuit breaker of the present invention;

[0021] Figure 3-Figure 4 It is a structural schematic diagram of the mechanical interlocking device of the disconnector and the circuit breaker of the present invention (the circuit breaker is open and the operating hole is exposed);

[0022] Figure 5-Figure 6 It is a structural schematic diagram of the mechanical interlocking device between the disconnector and the circuit breaker of the present invention (the circuit breaker is closed and the operating hole is blocked);

[0023] Figure 7 It is a structural schematic diagram of a crank arm in a mechanical interlocking device between an isolating switch and a circuit breaker of the present invention;

[0024] Figure 8 It is a structural schematic diagram of a locking member in a mechanical interlocking device between an isolating switch and a circuit breaker of the present invention;

[0025] Fig. 9 The invention discloses a schematic structural diagram of a guide sleeve in a mechanical interlocking device for an isolating switch and a circuit breaker. DETAILED DESCRIPTION

[0026] The following is combined with Figures 1 to 9 The given embodiments further illustrate the specific implementation of the mechanical interlocking device for a disconnector and a circuit breaker of the present invention. The mechanical interlocking device for a disconnector and a circuit breaker of the present invention is not limited to the description of the following embodiments.

[0027] A mechanical interlocking device for an isolating switch and a circuit breaker, comprising a baffle assembly, an interlocking mechanism and an interlocking mechanism; the baffle assembly comprises a panel 11 and a movable baffle 12 of the isolating switch 6, an operating hole 11a for inserting an operating handle is provided on the panel 11, and the movable baffle 12 is rotatably installed and can expose or cover the operating hole 11a; the interlocking mechanism comprises a crank arm 23 and a first interlocking rod 21, the crank arm 23 is provided on a transmission shaft 24, the crank arm 23 can be limitedly matched with the first interlocking rod 21 under the drive of the transmission shaft 24, a second interlocking rod 22 is fixedly provided on the first interlocking rod 21, and a locking mechanism for locking the circuit breaker is provided on the second interlocking rod 22 The locking piece 25 of the closing coil 51 in the circuit breaker 5; the interlocking mechanism connects the movable baffle 12 and the first interlocking rod 21; when the circuit breaker 5 is in the open state, the crank arm 23 releases the limit cooperation with the first interlocking rod 21, and the movable baffle 12 is pushed to expose the operating hole 11a, and the movable baffle enables the first interlocking rod 21 to move through the interlocking mechanism, driving the locking piece 25 of the second interlocking rod 22 to lock the closing coil 51 so that the circuit breaker 5 cannot be closed; when the circuit breaker 5 is in the closed state, the crank arm 23 is driven by the transmission shaft 24 and cooperates with the first interlocking rod 21 to limit the position, and then limits the movable baffle 12 through the interlocking mechanism, so that the movable baffle 12 cannot be pushed to expose the operating hole 11a.

[0028] The mechanical interlocking device of the disconnector and the circuit breaker of the present invention comprises a baffle assembly, an interlocking assembly and an interlocking mechanism to form a linkage mechanism. When the circuit breaker 5 is opened, the crank arm 23 and the first interlocking rod 21 are released from the limit position, and the baffle assembly can expose the operating hole 11a for operating the disconnector 6. At the same time, the baffle assembly enables the interlocking mechanism to lock the closing coil 51 of the circuit breaker 5 to prevent the circuit breaker 5 from closing by mistake. When the circuit breaker 5 is closed, the crank arm 23 and the first interlocking rod 21 are limited and matched, and the baffle assembly closes the operating hole 11a and prevents the operating hole 11a from being opened by mistake under the action of the interlocking mechanism. The locking of the disconnector 6 and the circuit breaker 5 adopts a non-electrically controlled mechanical structure, and the two can still be locked even in the absence of electrical interlocking. At the same time, an interlocking mechanism that changes the movement mode is provided between the movable baffle 12 and the first interlocking rod 21, which is conducive to the stability of the movable baffle 12 and the interlocking mechanism when the circuit breaker 5 is closed or opened.

[0029] As an implementation example Figure 1-6As shown, a mechanical interlocking device for a three-position disconnector and a circuit breaker includes a baffle assembly, an interlocking mechanism and an interlocking mechanism; the baffle assembly includes a panel 11 and a movable baffle 12, and an operating hole 11a that can be blocked by the movable baffle 12 is provided on the panel 11, and an operating handle (not shown in the figure) for operating the disconnector 6 can be inserted or pulled out of the operating hole 11a. The disconnector of this embodiment is a three-position disconnector. Of course, an indicating device for indicating the state of the three-position disconnector 6 can also be provided on the panel 11, and the movable baffle 12 is rotatably installed and can expose or block the operating hole 11a. The interlocking mechanism includes a crank arm 23 and a first interlocking rod 21, wherein the crank arm 23 is arranged on a transmission shaft 24, and the crank arm 23 can cooperate with the first interlocking rod 21 under the drive of the transmission shaft 24, and a second interlocking rod 22 is fixedly provided on the first interlocking rod 21, and a locking member 25 for locking the closing coil 51 in the circuit breaker 5 is provided on the second interlocking rod 22; the interlocking mechanism is rotatably mounted on the circuit breaker 5, and the two ends of the interlocking mechanism are respectively connected to the movable baffle 12 and the first interlocking rod 21, so that the movement trajectory of the movable baffle 12 and the first interlocking rod 21 is converted through the interlocking mechanism. Preferably, the movable baffle 12 moves in a circle, and the first interlocking rod 21 moves in its axial direction, and the circumferential rotation of the movable baffle 12 and the axial movement of the first interlocking rod 21 are converted through the interlocking mechanism. When the circuit breaker 5 is in the open state, the first interlocking rod 21 and the crank arm 23 are released from the limit fit, and the movable baffle 12 can be opened to expose the operating hole 11a (see Figure 3-4 ), and the movable baffle 12 activates the first interlocking rod 21 through the interlocking mechanism, driving the locking member 25 of the second interlocking rod 22 to lock the closing coil 51 so that the circuit breaker 5 cannot be closed. When the circuit breaker 5 is in the closed state, the crank arm 23 is driven by the rotating shaft 24 to limit the position of the first interlocking rod 21, and then limits the movable baffle 12 through the interlocking mechanism, so that the movable baffle 12 cannot be moved to expose the operating hole 11a (see Figure 5-6 ), making it impossible to operate the three-position disconnector 6, at which time the locking member 25 of the second interlocking rod 22 and the closing coil 51 remain in an unlocked state.

[0030] As an optimized structure, the baffle mechanism also includes a support plate 13, which is arranged opposite to the panel 11 with a gap therebetween, and the movable baffle 12 is rotatably supported between the support plate 13 and the panel 11. Preferably, a support portion 13a is protruding from the side of the support plate 13 close to the panel 11, and the end of the movable baffle 12 away from the interlocking mechanism is rotatably installed on the support portion 13a, and a support portion 12a is protruding from the side of the movable baffle 12 close to the panel 11, and the support portion 12a is supported on the panel 11. Preferably, a strip hole for the support portion 12a to pass through is provided on the panel 11, and the support portion 12a can be used as an indicating device for indicating the position of the movable baffle 12, and the end of the movable baffle 12 close to the interlocking mechanism is rotatably connected to the interlocking mechanism.

[0031] The crank arm 23 is preferably as follows Figure 7 As shown, the crank arm 23 is the closing crank arm 23 in the circuit breaker 5, and the transmission shaft 24 is the transmission shaft 24 connected to the closing crank arm 23 in the circuit breaker 5. The transmission shaft 24 is a spline shaft, and a spline hole cooperating with the transmission shaft 24 is provided in the crank arm 23, and a protrusion is provided on one side of the crank arm 23 for cooperating with the first interlocking rod 21. Of course, the crank arm 23 and the transmission shaft 24 can also adopt other connection methods besides spline cooperation, as long as it is ensured that the crank arm 23 can be driven by the transmission shaft 24. The interlocking mechanism includes a first interlocking rod 21 and a second interlocking rod 22, one end of the first interlocking rod 21 can be in conflict with the crank arm 23 to achieve limited cooperation, and the other end of the first interlocking rod 21 is used for rotational connection with the interlocking mechanism; the second interlocking rod 22 is vertically fixed on the first interlocking rod 21, and a locking member 25 is provided in the middle of the second interlocking rod 22 (see Figure 8 ), one end of the locking member 25 is provided as a connection end with a strip-shaped through hole for sliding fit of the second interlocking rod 22, and the other end of the locking member 25 is provided as a locking end opposite to the closing coil 51 of the circuit breaker 5, and a support shaft 26 for rotation support is provided between the connection end and the locking end, and the support shaft 26 is fixed to the support structure inside the circuit breaker, such as the internal frame support plate of the circuit breaker. Preferably, Figure 2As shown, the interlocking mechanism also includes a fixed block 28 and a guide plate 27, wherein the fixed block 28 is used to fix the first interlocking rod 21 and the second interlocking rod 22 in connection; the guide plate 27 is disposed between the locking member 25 and the fixed block 28, one end of the guide plate 27 is fixed to the circuit breaker 5, and the other end of the guide plate 27 is provided with a strip hole for the second interlocking rod 22 to pass through, and the second interlocking rod 22 can slide in the strip hole. In this preferred embodiment, the movement of the first interlocking rod 21 along the axis does not substantially occupy the volume of the circuit breaker, and fully utilizes the space of the circuit breaker, while the second interlocking rod 22 connected to the first interlocking rod 21 increases the torque through the rotation of the locking member 25, and the second interlocking rod 22 itself does not require much moving space, especially the locking member 25 and the second interlocking rod 22 are driven by the strip hole on the locking member 25, which not only occupies a small space, but also has high reliability and is easy to install, and will not deviate.

[0032] When the circuit breaker 5 is in the open state (see Figure 3-4 ), the transmission shaft 24 drives the crank arm 23 to rotate so that the first interlocking rod 21 is separated from the crank arm 23 to release the limit cooperation, and when the movable baffle 12 is moved to expose the operating hole 11a, the movable baffle 12 causes the first interlocking rod 21 to move axially in the direction away from the interlocking mechanism through the interlocking mechanism, and at the same time, the second interlocking rod 22 slides in the through hole of the locking member 25 with the movement of the first interlocking rod 21, and the sliding action of the second interlocking rod 22 in the through hole causes the locking member 25 to rotate under the action of the support shaft 26, and causes the locking end to be aligned with the closing line after rotation. The first interlocking rod 21 abuts against the second interlocking rod 22 to lock the closing coil 51 so that the circuit breaker 5 cannot be closed. Specifically, the locking end abuts against one end of the closing coil 51 to limit the movement of the movable push rod in the closing coil 51 to close the circuit breaker 5. The action process is that when the first interlocking rod 21 drives the second interlocking rod 22 to move downward, the locking member 25 rotates with the support shaft 26 as the rotation axis, and the locking end of the locking member 25 abuts against one end of the movable push rod of the closing coil 51 to limit the movement of the movable push rod in the closing coil 51 to close the circuit breaker 5.

[0033] When the circuit breaker 5 is in the closed state (see Figure 5-6 ), the transmission shaft 24 drives the crank arm 23 to rotate so that one end of the first interlocking rod 21 conflicts with the crank arm 23, so that the first interlocking rod 21 cannot move in the direction away from the interlocking mechanism. At this time, the movable baffle 12 linked with the first interlocking rod 21 through the interlocking mechanism cannot be opened and cannot leak out of the operating hole 11a, thereby locking the three-position isolating switch. At this time, the second interlocking rod 22 has slid in the through hole of the locking member 25 with the movement of the first interlocking rod 21. The sliding action of the second interlocking rod 22 in the through hole causes the locking member 25 to rotate under the action of the support shaft 26, and the locking end is separated from the closing coil 51 after rotation to release the lock of the closing coil 51.

[0034] Specifically, the interlocking mechanism includes a first connecting plate 31, a second connecting plate 32 and a connecting shaft 33, one end of the first connecting plate 31 is rotatably connected to the movable baffle 12, the other end of the first connecting plate 31 is fixedly mounted on one end of the connecting shaft 33, the other end of the connecting shaft 33 is fixedly connected to one end of the second connecting plate 32, the other end of the second connecting plate 32 is rotatably connected to the first interlocking rod 21, and a fixed angle is maintained between the first connecting plate 31 and the second connecting plate 32, the axial movement of the first interlocking rod 21 drives the second connecting plate 32 to rotate, and the rotation of the connecting shaft 33 drives the first connecting plate 31 to rotate, so that the movable baffle 12 rotates; similarly, the rotation of the movable baffle 12, through the transmission of the first connecting plate 31, the connecting shaft 33 and the second connecting plate 32, causes the first interlocking rod 21 to actuate, this structure can realize that the movable baffle 12 and the first interlocking rod 21 maintain a stable state when the circuit breaker 5 is closed or opened, and prevent the circuit breaker 5 or the three-position disconnector 6 from being misoperated due to structural instability. As shown in the figure, the first connecting plate 31 and the second connecting plate 32 are kept perpendicular to each other, but they can also be kept at other non-right angles. Furthermore, the interlocking mechanism also includes a support seat 34, the bottom end of which is fixed to the upper part of the circuit breaker for fixed support of the connecting shaft 33, and connecting ear plates for the connecting shaft 33 to pass through are respectively provided on both sides of the support seat 34.

[0035] Preferably, an elastic reset mechanism is provided on the first interlocking rod 21, and the elastic reset mechanism causes the first interlocking rod 21 to move axially in a direction close to the interlocking mechanism. When the circuit breaker is in the open state, the movable baffle 12 of the baffle assembly rotates to a position where the operating hole 11a is exposed, and the movable baffle 12 drives the first interlocking rod 21 through the interlocking mechanism to overcome the elastic force of the elastic reset mechanism and move axially in a direction away from the interlocking mechanism. At the same time, the second interlocking rod 22 slides in the through hole of the locking member 25 along with the movement of the first interlocking rod 21, and the sliding action of the second interlocking rod 22 in the through hole causes the locking member 25 to be aligned with the closing line. When the movable baffle 12 of the baffle assembly rotates to the position of blocking the operating hole 11a, the elastic reset mechanism drives the first interlocking rod 21 to return to its original position. At this time, the second interlocking rod 22 slides in the through hole of the locking piece 25 with the movement of the first interlocking rod 21. The sliding action of the second interlocking rod 22 in the through hole causes the locking piece 25 to rotate under the action of the support shaft 26, and the locking end is separated from the closing coil 51 after rotation to release the locking of the closing coil 51. The elastic reset mechanism is conducive to timely unlocking of the closing coil 51.

[0036] Specifically, the elastic reset mechanism includes a guide sleeve 41 and a compression spring 42. The guide sleeve 41 is fixedly arranged on the circuit breaker 5. A guide hole for the first interlocking rod 21 to pass through is provided on two opposite side walls of the guide sleeve 41. The compression spring 42 is arranged between two opposite side plates of the guide sleeve 41 and sleeved on the first interlocking rod 21. Fig. 9 As shown, the guide sleeve 41 is a U-shaped guide sleeve 41, and the guide sleeve 41 can also be a closed frame structure or a structure with only two opposite side walls; a matching portion for deforming the compression spring 42 is provided on the first interlocking rod 21, and under the cooperation of the two opposite side walls of the guide sleeve 41 and the matching portion of the first interlocking rod 21, the compression spring 42 is deformed to provide a driving force for the first interlocking rod 21 to reset. Preferably, the matching portion on the first interlocking rod 21 is a protruding structure protruding from the side wall of the first interlocking rod 21, preferably a protruding structure surrounding the side wall of the first interlocking rod 21, the matching portion abuts against one end of the compression spring 42, and the other end of the compression spring 42 abuts against one side wall of the guide sleeve 41, when the first interlocking rod 21 moves axially, the compression spring 42 is deformed and stores elastic force under the cooperation of the matching portion and the side wall of the guide sleeve 41, and the elastic force stored by the compression spring 42 can provide a driving force for the first interlocking rod 21 to return to its original position, thereby driving the movable baffle 12 to be closed.

[0037] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A mechanical interlocking device for an isolating switch and a circuit breaker, characterized in that: The invention comprises a baffle assembly, an interlocking mechanism and an interlocking mechanism; the baffle assembly comprises a panel (11) of an isolating switch (6) and a movable baffle (12); an operating hole (11a) for inserting an operating handle is provided on the panel (11); the movable baffle (12) is rotatably installed and can expose or cover the operating hole (11a); the interlocking mechanism comprises a crank arm (23) and a first interlocking rod (21); the crank arm (23) is arranged on a transmission shaft (24); the crank arm (23) can be limitedly matched with the first interlocking rod (21) under the drive of the transmission shaft (24); a second interlocking rod (22) is fixedly provided on the first interlocking rod (21); a locking member (25) for locking a closing coil (51) in a circuit breaker (5) is provided on the second interlocking rod (22); the locking member (25) is used to lock the closing coil (51) in the circuit breaker (5 ... One end of the fixed member (25) is provided as a connection end with a strip-shaped through hole for slidingly engaging with the second interlocking rod (22); the other end of the locking member (25) is provided as a locking end opposite to the closing coil (51) of the circuit breaker (5); a support shaft (26) for rotational support is provided between the connection end and the locking end; the second interlocking rod (22) slides in the through hole of the locking member (25) as the first interlocking rod (21) moves; the sliding action of the second interlocking rod (22) in the through hole causes the locking member (25) to rotate under the action of the support shaft (26), and causes the locking end to abut against or separate from the closing coil (51) after rotation, so as to lock the closing coil (51) or release the locking of the closing coil (51); the interlocking mechanism connects the movable baffle (12) and the first interlocking rod (21); When the circuit breaker (5) is in an open state, the crank arm (23) and the first interlocking rod (21) are released from the limit fit, the movable baffle (12) is moved to expose the operating hole (11a), and at the same time, the movable baffle (12) activates the first interlocking rod (21) through the interlocking mechanism, driving the locking member (25) of the second interlocking rod (22) to lock the closing coil (51), so that the circuit breaker (5) cannot be closed; When the circuit breaker (5) is in a closed state, the crank arm (23) is driven by the transmission shaft (24) to cooperate with the first interlocking rod (21) in a limiting manner, thereby limiting the movable baffle (12) through the interlocking mechanism, so that the movable baffle (12) cannot be moved to expose the operating hole (11a).

2. The mechanical interlocking device of the isolating switch and the circuit breaker according to claim 1 is characterized in that: The movable baffle (12) moves in a circular motion, and the first interlocking rod (21) moves in an axial direction thereof; the circular rotation of the movable baffle (12) and the axial movement of the first interlocking rod (21) are converted through an interlocking mechanism.

3. The mechanical interlocking device of the disconnector and the circuit breaker according to claim 1 is characterized in that: The interlocking mechanism comprises a first connecting plate (31), a second connecting plate (32) and a connecting shaft (33); one end of the first connecting plate (31) is rotatably connected to the movable baffle (12); the other end of the first connecting plate (31) is fixedly mounted on one end of the connecting shaft (33); the other end of the connecting shaft (33) is fixedly connected to one end of the second connecting plate (32); and the other end of the second connecting plate (32) is rotatably connected to the first interlocking rod (21).

4. The mechanical interlocking device of the disconnector and the circuit breaker according to claim 1, characterized in that: An elastic reset mechanism is provided on the first interlocking rod (21), and the elastic reset mechanism causes the first interlocking rod (21) to move axially in a direction close to the interlocking mechanism. When the movable baffle (12) of the baffle assembly rotates to a position where the operating hole (11a) is exposed, the movable baffle (12) drives the first interlocking rod (21) through the interlocking mechanism to overcome the elastic reset mechanism and move axially in a direction away from the interlocking mechanism. At the same time, the second interlocking rod (22) moves along with the first interlocking rod (21) so that the locking piece (25) abuts against the closing coil (51) to lock the closing coil (51) so that the circuit breaker (5) cannot be closed. When the movable baffle (12) of the baffle assembly rotates to a position where the operating hole (11a) is blocked, the elastic reset mechanism drives the first interlocking rod (21) to return to its original position, and the second interlocking rod (22) moves along with the first interlocking rod (21) so that the locking piece (25) releases the locking of the closing coil (51).

5. The mechanical interlocking device of the disconnector and the circuit breaker according to claim 4 is characterized in that: The elastic reset mechanism comprises a guide sleeve (41) and a compression spring (42); the guide sleeve (41) is fixedly arranged on the circuit breaker (5); guide holes for the first interlocking rod (21) to pass through are provided on two opposite side walls of the guide sleeve (41); the compression spring (42) is arranged between two opposite side plates of the guide sleeve (41) and sleeved on the first interlocking rod (21); a matching portion for causing the compression spring (42) to deform is provided on the first interlocking rod (21); and under the cooperation of the two opposite side walls of the guide sleeve (41) and the matching portion of the first interlocking rod (21), the compression spring (42) is deformed to provide a driving force for resetting the first interlocking rod (21).

6. The mechanical interlocking device of the disconnector and the circuit breaker according to claim 1 or 2, characterized in that: One end of the first interlocking rod (21) can abut against the crank arm (23) to achieve limited fit, and the other end of the first interlocking rod (21) is used for rotationally connecting with the interlocking mechanism; the second interlocking rod (22) is vertically fixed to the first interlocking rod (21), and a locking member (25) is provided in the middle of the second interlocking rod (22).

7. The mechanical interlocking device of the disconnector and the circuit breaker according to claim 1, characterized in that: The baffle assembly further comprises a support plate (13), the support plate (13) and the panel (11) being arranged opposite to each other with a gap therebetween, the movable baffle (12) being rotatably supported between the support plate (13) and the panel (11), and an indicating device for indicating the state of the isolating switch (6) being provided on the panel (11).

8. The mechanical interlocking device of the disconnector and the circuit breaker according to claim 7, characterized in that: A support portion (13a) is protruding from a side of the support plate (13) close to the panel (11); an end of the movable baffle (12) away from the interlocking mechanism is rotatably mounted on the support portion (13a); a support portion (12a) is protruding from a side of the movable baffle (12) close to the panel (11); the support portion (12a) is supported on the panel (11); and an end of the movable baffle (12) close to the interlocking mechanism is rotatably connected to the interlocking mechanism.

9. The mechanical interlocking device of the disconnector and the circuit breaker according to claim 6, characterized in that: The interlocking mechanism further comprises a fixing block (28) and a guide plate (27), wherein the fixing block (28) is used to fix the first interlocking rod (21) and the second interlocking rod (22) in connection; the guide plate (27) is arranged between the locking member (25) and the fixing block (28), one end of the guide plate (27) is fixed to the circuit breaker (5), and the other end of the guide plate (27) is provided with a strip hole for the second interlocking rod (22) to pass through, and the second interlocking rod (22) can slide in the strip hole.

10. The mechanical interlocking device of the disconnector and the circuit breaker according to claim 3, characterized in that: The interlocking mechanism further comprises a support seat (34), and connecting ear plates for the connecting shaft (33) to pass through are respectively provided on both sides of the support seat (34).

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