CN116631816A - Locking device and load break switch - Google Patents

Abstract

A locking device and a load break switch, wherein the load break switch comprises the locking device and an operating mechanism, the operating mechanism is provided with a handle, and a first blocking part is arranged on the handle; the lever is rotationally connected with the device shell and is provided with a second blocking part and a first coupling part; the lock plate is provided with a second coupling part and a locking part; when the operating mechanism is at the opening position, the locking plate is moved to be matched with the first coupling part of the lever through the second coupling part to drive the lever to rotate, the second blocking part of the lever is abutted to the first blocking part of the handle to block the switching-on of the operating mechanism, unless the locking of the locking part is released, the lever cannot rotate the yielding operating mechanism, the operating mechanism cannot drive the load break switch to switch on any more, an operator can be reliably protected, and accidents caused by unexpected switching-on are avoided.

Description

Locking device and load break switch

Technical Field

The invention relates to the field of piezoelectric devices, in particular to a locking device and a load break switch.

Background

The load break switch is an important switching device of a power distribution system, is commonly used in a power distribution circuit and a motor circuit with high voltage and high current short-circuit current, is used as a power switch, an isolating switch or an emergency switch which are operated manually infrequently, and is used for protecting a circuit short-circuit. The load break switch is generally provided with an energy storage disconnecting switch and a pluggable fuse set, and a user drives an operating mechanism through a handle to drive a moving contact to be matched with a static contact so as to conduct and break a circuit, and the fuse set provides current protection.

However, the conventional load break switch is generally not provided with a locking device, and when the line is inspected, the load break switch cannot be locked in a state where the load break switch cannot be closed, and if the load break switch is closed, an electric shock accident is caused.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a locking device capable of locking a load break switch in a brake-separating state.

A locking device, comprising:

the operating mechanism is provided with a handle, and a first blocking part is arranged on the handle;

the lever is rotationally connected with the device shell and is provided with a second blocking part and a first coupling part;

the lock plate is provided with a second coupling part and a locking part, and the locking part is used for locking the movement of the lock plate;

when the operating mechanism is at the opening position, the locking plate is enabled to move to be matched with the first coupling part of the lever through the second coupling part, the lever is driven to rotate, the second blocking part of the lever abuts against the first blocking part of the handle, and the operating mechanism is blocked from being closed.

Preferably, the locking part of the locking plate can move between the inside and the outside of the device shell, and the operating mechanism moves the locking part to the outside of the device shell when in the opening position, so as to be used for setting a locking piece, and meanwhile, the locking plate drives the lever to rotate, so that the second blocking part of the lever abuts against the first blocking part of the handle.

Preferably, the handle is provided with an avoidance structure, and when the operating mechanism is at the closing position, the handle is in avoidance with the second blocking part of the lever through the avoidance structure.

Preferably, the lock plate is connected with a limit spring, and the limit spring drives the lock plate to move into the device shell.

Preferably, the lever comprises a locking plate, and the locking plate is blocked by the handle when the operating mechanism is in a closing position, so that the lever cannot rotate and the locking plate is blocked from moving.

Preferably, the rotation plane of the lever is parallel to the rotation plane of the handle.

Preferably, the lock plate is slidably disposed along a side wall of the device housing.

Preferably, the first coupling part is a coupling shaft arranged at one side of the locking plate, the second coupling part is a coupling groove sleeved on the coupling shaft, and the side wall of the coupling groove is pushed by the coupling shaft to drive the lever to rotate when the locking plate moves.

Preferably, the first blocking part is an action shaft arranged on the handle, one end of the second blocking part is connected with the rotation center of the lever, and one end of the second blocking part far away from the rotation center of the lever is used for blocking the action shaft.

Preferably, the lock plate is provided with two transmission plates which are oppositely arranged, the coupling shaft is connected between the two transmission plates, the coupling groove is U-shaped, and the coupling groove can be inserted between the two transmission plates and sleeved on the coupling shaft.

Preferably, the device further comprises an indicator which is rotatably arranged on the device shell and matched with the operating mechanism, and an elastic piece which is connected with the indicator, wherein the indicator is provided with an indication mark.

Preferably, the indicating piece and the driving structure are respectively matched with an action shaft in the operating mechanism, the power structure of the indicating piece is positioned on a closing path of the action shaft under the driving of the elastic piece, and the second blocking part of the lever can rotate to the closing path of the action shaft under the driving of the locking plate.

Preferably, the indicating member comprises two groups of indicating units, each of the two groups of indicating units comprises a group of power structure and indicating structure, the device shell is provided with a mounting structure inserted between the two groups of indicating units, the power structure of at least one group of indicating units is rotationally connected with the mounting structure, and a space for avoiding the lever is formed between the two groups of indicating units at intervals.

Preferably, the lever passes through between the two groups of indication units, the lever is rotatably installed on the installation structure, and the first coupling part and the second blocking part of the lever are oppositely arranged at two sides of the indication piece.

Preferably, the indicating member comprises a positioning plate connected between two groups of indicating units, the positioning plate is abutted against the breaker mounting structure under the driving of the elastic member, and the lever is provided with a first avoidance groove for avoiding the positioning plate.

Preferably, the mounting structure comprises a mounting seat and two mounting plates oppositely arranged on the mounting seat, the two mounting plates are respectively positioned between the power structures of the two groups of indication units, the lever is positioned between the two mounting plates, and the connecting shaft penetrates through and rotationally connects the two groups of power structures, the two mounting plates and the lever together.

Preferably, the lock plate is provided with a spring plate, the spring plate is connected with the device shell through a limiting spring, the limiting spring and the lock plate are arranged at intervals, the device shell is provided with an inner baffle plate which can be inserted between the limiting spring and the lock plate, and the inner baffle plate blocks the lock plate from leaving the device shell through limiting the spring plate.

A load break switch comprising a switch housing and an operating mechanism and at least one phase circuit disposed within the switch housing, the phase circuit comprising a contact system and a fuse, and further comprising a locking device according to any of claims, the device housing of the locking device being mounted on the switch housing.

Preferably, the handle comprises two connecting handles which are oppositely arranged, and an operating handle which is connected between one ends of the two connecting handles, wherein a through hole which forms the avoidance structure is formed between the two connecting handles and the operating handle in a surrounding mode, and an action shaft lever which is matched with the locking device is arranged on the inner side of one connecting handle.

Preferably, the device shell is provided with an inserting structure, the switch shell is respectively provided with a slot structure and a chute, and when the device shell slides along the chute, the inserting structure can be driven to be inserted into the inserting structure for limiting fit.

The locking device can be additionally arranged above the operating mechanism of the load circuit breaker, the lever is driven to rotate through the locking plate, the lever blocks the operating mechanism to be switched on, the locking part is used for limiting the movement of the locking plate, the locking plate blocks the lever to rotate, unless the locking of the locking part is released, the lever cannot rotate the abdicating operating mechanism, the operating mechanism cannot drive the load circuit breaker to be switched on any more, an operator can be reliably protected, and accidents caused by unexpected switching-on are avoided.

In addition, the locking part of lock plate can remove between the inside and the outside of device casing, and when locking device did not block operating device combined floodgate, lock plate and locking part wholly were located the device casing, through removing the locking part to the device casing outside, set up the latch fitting and make the lock plate unable removal for set up the action of latch fitting and drive the action that the lock plate removed the blocking handle synchronous, convenient operation saves the action step.

In addition, the handle can be matched with the second blocking part of the lever and the power structure of the indicating piece through one part of the action shaft, so that the locking function and the indicating function are combined ingeniously.

Drawings

FIG. 1 is a schematic diagram of a load break switch;

FIG. 2 is a schematic diagram of the assembly of the device housing with the switch housing;

FIG. 3 is a schematic view of the structure of the locking device and the indicating device;

FIG. 4 is an exploded view of the locking device and the indicating device;

FIG. 5 is a partial cross-sectional view of FIG. 3;

FIG. 6 is a schematic view of the assembly of the indicator with the device housing;

FIG. 7 is the handle, lock and indicator in the open position;

FIG. 8 is a handle and indicator in a closed position;

FIG. 9 is a schematic view of the engagement of the locking device with the handle;

FIG. 10 is an enlarged view of a portion of FIG. 9;

fig. 11 is a schematic view of the engagement of the limiter with the outer padlock body.

Detailed Description

The following describes further embodiments of the locking device according to the invention in connection with the embodiments shown in fig. 1 to 11. The locking device of the invention is not limited to the description of the embodiments below.

As shown in fig. 1, the load break switch of this embodiment includes a switch housing 6, an operating mechanism 7 and at least one phase circuit disposed in the switch housing 6, the phase circuit includes a contact system and a fuse 9 connected in series, the contact system includes a moving contact assembly 81 and a fixed contact 80 that are used in cooperation, the moving contact assembly 81 of the at least one phase circuit is respectively connected with a contact push rod 60, the operating mechanism 7 includes a handle 71, and typically includes a mechanism push rod, a mechanism link and a mechanism spring, the mechanism link is used for locking the operating mechanism 7, the mechanism push rod is connected with the contact push rod 60, the mechanism spring is connected between the handle 71 and the mechanism push rod, when the handle 71 rotates, the mechanism push rod drives the moving contact assembly 81 of the at least one phase circuit to contact and separate from the corresponding fixed contact 80 through the contact push rod 60, so as to implement closing and breaking of the circuit, and the fuse 9 is fused under conditions such as current overload or short circuit.

An improvement of the invention is that the load break switch is provided with a locking device.

As shown in fig. 3, the locking device of the present invention includes:

an operating mechanism 7, wherein the operating mechanism 7 is provided with a handle 71, and a first blocking part is arranged on the handle 71;

a lever 2, the lever 2 is rotatably connected with the device housing 1, and the lever 2 is provided with a second blocking part 22 and a first coupling part;

a lock plate 3, wherein a second coupling portion and a locking portion 32 are provided on the lock plate 3, and the locking portion 32 is used for locking the movement of the lock plate 3, for example, a lock member 350 is provided;

when the operating mechanism 7 is at the opening position, the locking plate 3 is moved to be matched with the first coupling part of the lever 2 through the second coupling part, so that the lever 2 is driven to rotate, the second blocking part 22 of the lever 2 abuts against the first blocking part of the handle 71, and the operating mechanism 7 is blocked to be closed.

The locking device can be additionally arranged above the operating mechanism 7 of the load circuit breaker, the lever 2 is driven to rotate through the locking plate 3, so that the lever 2 blocks the operating mechanism to be switched on, then the locking plate 3 is limited to move through the locking part 32, so that the locking plate 3 blocks the lever 2 to rotate, unless the locking of the locking part 32 is released, the lever 2 cannot rotate the yielding operating mechanism 7 any more, and the operating mechanism 7 cannot drive the load circuit breaker to be switched on any more, so that an operator can be reliably protected, and accidents caused by unexpected switching-on are avoided.

Preferably, the locking portion 32 of the locking plate 3 is capable of moving between the inside and the outside of the device housing 1, and the operating mechanism 7 moves the locking portion 32 to the outside of the device housing 1 when in the opening position, and limits the locking portion 32 to lock the movement of the locking plate 3, preferably for providing the lock 350, and at the same time, the locking plate 3 drives the lever 2 to rotate, so that the second blocking portion 22 of the lever 2 abuts against the first blocking portion of the handle 71, and the operating mechanism 7 is prevented from closing. The handle 71 is provided with an avoidance structure, and when the operating mechanism 7 is in the closing position, the handle 71 is in avoidance with the second blocking part 22 of the lever 2 through the avoidance structure.

When the locking device does not block the switching-on of the operating mechanism, the locking plate 3 and the locking part 32 thereof are integrally positioned in the device shell 1, and the locking part 32 is moved to the outer side of the device shell 1, so that the locking piece 350 is arranged to ensure that the locking plate 3 cannot move, the action of arranging the locking piece 350 is synchronous with the action of driving the locking plate 3 to move to block the handle 71, the operation is convenient, and the action steps are saved; and when the blocking operation mechanism 7 is not closed, the locking plate 3 is positioned in the device shell 1, so that the whole locking device is more compact, and the locking piece 350 can be limited with the device shell 1. Of course, as another embodiment, the locking portion 32 may be located outside the device housing 1, and when the lock plate 3 moves, the locking portion 32 may move to a locking position outside the device housing 1, and the lock 350 may lock the locking portion 32 to the locking position of the device housing 1.

Another improvement of the invention is that the load break switch is provided with an indicating device.

As shown in fig. 3, the indication device of the invention comprises a device shell 1, an indication element 4 and an elastic element 5, wherein the indication element 4 is rotatably arranged on the device shell 1, an indication structure 41 and a power structure 42 are respectively arranged on the indication element 4, an indication window 43 corresponding to the indication structure 41 is arranged on the device shell 1, at least two indication marks 44 are arranged on the indication structure 41, an operation mechanism 7 of the load break switch pushes the power structure 42 when switching on or switching off, the indication mark 44 of the indication element 4 is overlapped with the indication window 43, and the elastic element 5 is connected with the indication element 4 and is used for driving the indication element 4 to reset.

The indicating device provided by the invention can be additionally arranged above the operating mechanism 7 of the load break switch as an independent module and is used for being matched with the operating mechanism 7, the operating mechanism 7 pushes the indicating piece 4 to display the indicating mark 44 when the load break switch is switched on or off, the indicating device is used for displaying the switching-on or switching-off state, the working state of the load break switch can be directly observed, and the existing load break switch and the operating mechanism 7 thereof do not need to be modified.

Further, as shown in fig. 2, the device housing 1 of the present embodiment is mounted on the switch housing 6 above the operating mechanism 7, and the handle 71 is provided with an actuating shaft 7A, and the handle 71 can be respectively engaged with the second blocking portion 22 of the lever 2 and the power structure 42 of the indicator 4 through one part of the actuating shaft 7A, so as to skillfully combine the locking function and the indicating function.

Specifically, fig. 7 and 8 show a switching-off state and a switching-on state of the operating mechanism 7 respectively, wherein the switching-on process is a process of changing the operating mechanism 7 from fig. 7 to fig. 8, and the action shaft 7A rotates leftwards from the position of fig. 7 in the switching-on process;

the lever 2 actively operates the locking plate 3 to drive the second blocking part 22 to rotate clockwise to the closing path of the action shaft 7A only when the load break switch is required to be locked, the action shaft 7A is blocked from rotating leftwards from the position of fig. 7, if the load break switch is not required to be locked, the second blocking part 22 cannot rotate to the position of the action shaft 7A on the closing path, and the action shaft 7A can rotate leftwards for closing;

the indicator 4 is supported on the device housing 1 anticlockwise under the drive of the elastic piece 5, the power structure 42 of the indicator 4 is always located on the closing path of the action shaft 7A, the indication window 43 displays the indication mark 44 corresponding to opening, and when the operation mechanism 7 is closed, the action shaft 7A rotates leftwards and pushes the power structure 42, and the indication mark 44 corresponding to closing is displayed.

It will be appreciated that the handle 71 may be provided with formations for engaging the lever 2 and the indicator 4 respectively at two different positions, or by engaging the lever 2 and the indicator 4 respectively by two different parts of the operating mechanism 7, but the overall arrangement may become very complex. Of course, the operating mechanism 7 is not limited to the above embodiment, and when the operating mechanism 7 is implemented by using the prior art, the second blocking portion 22 can still block the switching on of the operating mechanism 7, which falls within the protection scope of the present invention.

As shown in fig. 3-4, the device housing 1 is provided with a mounting structure 11 matched with a connecting shaft 12, the connecting shaft 12 penetrates through the mounting structure 11, the lever 2 and the indicator 4 respectively and connects the mounting structure 11, the lever 2 and the indicator 4 together, and the device housing 1, the mounting structure 11 and the lever 2 can be mounted together only by one part through the connecting shaft 12.

Preferably, a shaft shoulder 121 is disposed at one end of the connecting shaft 12, a shaft groove 123 for mounting a retaining ring 122 is disposed at one end of the connecting shaft 12 away from the shaft shoulder 121, and after one end of the connecting shaft 12 provided with the shaft groove 123 passes through the device housing 1, the mounting structure 11 and the lever 2, the retaining ring 122 is mounted on the shaft groove 123, so that the device housing 1, the mounting structure 11 and the lever 2 are limited between the retaining ring 122 and the shaft shoulder 121.

It will be appreciated that the mounting structure 11 and the lever 2 may be mounted to the device housing 1, respectively, and that the device housing 1, the mounting structure 11, and the lever 2 may be connected by other means, which are all within the scope of the present invention.

As shown in fig. 3-4, the rotation plane of the lever 2 is parallel to the rotation plane of the handle 71. Specifically, the lever 2 of the present embodiment includes a pivoting plate 24 (fig. 5) rotatably connected to the device housing 1, and a coupling plate 25 and a second blocking portion 22 disposed opposite to both sides of the pivoting plate 24, where the first coupling portion is a coupling shaft 31 disposed on one side of the lock plate 3, the second coupling portion is disposed on the coupling plate 25, and the second coupling portion is a coupling groove 21 sleeved on the coupling shaft 31, and when the lock plate 3 moves, the coupling shaft 31 pushes a side wall of the coupling groove 21 to drive the lever 2 to rotate; the first blocking part is an action shaft 7A arranged on the handle 71, one end of the second blocking part 22 is connected with the rotation center of the lever 2, one end of the second blocking part 22 far away from the rotation center of the lever 2 is used for blocking the action shaft 7A, and the side wall of the coupling groove 21 is pushed by the coupling shaft 31 when the lock plate 3 moves, so that the coupling plate 25 drives the lever 2 to rotate, and meanwhile, the coupling shaft 31 can move along the groove wall of the coupling groove 21. It will be appreciated that the coupling groove 21 may be a closed structure with a circular waist shape, and the coupling shaft 31 on the lock plate 3 may be other structures, so that the coupling shaft 31 may be inserted into the coupling groove 21 from the side, or the coupling groove 21 may be other polygonal shapes, so that the coupling shaft 31 may move along the coupling groove 21.

As shown in fig. 9-10, a locking plate 23 matched with the operating mechanism 7 is arranged on one side of the coupling plate 25, the locking plate 23 is preferably formed by bending one side of the coupling plate 25 close to the coupling groove 21, and the locking plate 23 is blocked by a handle 71 when the switch is closed, so that the lever 2 cannot rotate. Preferably, the handle 71 is provided with a locking shaft 7B, the handle 71 is in limit fit with the locking plate 23 during closing, and the locking plate 23 is pushed by the locking shaft 7B during closing, so that the locking plate 23 drives the locking plate 3 to retract into the device housing 1, and the locking plate 3 is blocked from extending out of the device housing 1. The locking part 32 of the locking plate 3 can move out of the device housing 1 or retract into the device housing 1, when the locking part 32 is out of the device housing 1, the locking plate 3 drives the second blocking part 22 of the lever 2 to rotate to a position blocking the closing operation of the operating mechanism 7, and when the locking part 32 is retracted into the device housing 1, the locking plate 3 drives the second blocking part 22 of the lever 2 to release the limit of the closing operation of the operating mechanism 7, namely, at the moment, the operating mechanism 7 can perform the closing operation to drive the load break switch to close. After the operating mechanism 7 drives the loadbreak switch to close, the locking plate 23 is blocked by the operating mechanism 7, and the locking plate 23 of the lever 2 blocks the locking plate 3 so that the locking portion 32 cannot protrude from the device housing 1, i.e., the operating mechanism 7 cannot be locked by the locking device at this time. When the operating mechanism 7 is opened, the lock plate 23 is released, and the locking portion 32 of the lock plate 3 can be moved to protrude from the device housing 1.

As shown in fig. 3-6, the indicator 4 includes two sets of indicating units, each of the two sets of indicating units includes a set of power structure 42 and an indicating structure 41, the device housing 1 is provided with a mounting structure 11 inserted between the two sets of indicating units, the power structure 42 of at least one set of indicating units is rotatably connected with the mounting structure 11, the lever 2 can pass through the two sets of indicating units, the lever 2 is rotatably mounted on the mounting structure 11, and the first coupling part and the second blocking part 22 of the lever 2 are relatively arranged at two sides of the indicator 4.

The two sets of indication marks 44 are respectively arranged on the indication structures 41 of the two sets of indication units, so that the two sets of indication marks 44 can respectively indicate the working states of different devices, and the indication piece 4 can also improve the structural strength and balance of the indication piece by virtue of the design of the double-layer structure, and can prevent the problems of damage, skew and the like caused by the impact of the action shaft 7A. In addition, because the lever 2 occupies a larger space in the transverse direction and the indicator 4 occupies a larger space in the longitudinal direction, the lever 2 can pass through the staggered design of the indicator 4, the space utilization rate can be improved, and the whole switch is prevented from being increased in size.

Further, the indicating member 4 includes a connection plate 45, the power structures 42 of the two sets of indicating units are connected through the connection plate 45 between the ends far away from the mounting structure 11 of the mounting plate 111, the indicating structures 41 of the two sets of indicating units are respectively disposed on the sides of the respective power structures 42 far away from the other indicating unit, an insertion space is formed between the indicating structures 41 of the two sets of indicating units, and the lever 2 and the mounting structure 11 can be respectively inserted between the two sets of indicating units from the insertion space.

Further, the elastic member 5 is a torsion spring, the torsion spring includes a spiral structure sleeved on the connecting shaft 12, and a first spring arm 51 and a second spring arm 52 respectively connected with the spiral structure, the first spring arm 51 is connected with the power structure 42 of the indicator 4, and the second spring arm 52 is connected with the mounting structure 11 on the device housing 1.

Preferably, the spiral structure of the elastic member 5 is located at the outer sides of the two sets of indication units, a yielding groove 53 for avoiding the second spring arm 52 is provided on one of the power structures 42, and the second spring arm 52 is inserted into the inner sides of the two sets of indication units from the yielding groove 53 to be connected with the mounting structure 11. The rotating member is retracted into the elastic member 5 through the recess 53, and the elastic member 5 is not pushed even after the rotating member rotates by a certain angle.

Further, as shown in fig. 3, the mounting structure 11 on the device housing 1 includes a mounting seat 110 and two mounting plates 111 oppositely disposed on the mounting seat 110, the two mounting plates 111 are respectively located between the power structures 42 of the two sets of indication units, the lever 2 is located between the two mounting plates 111, the connecting shaft 12 penetrates through and rotationally connects the two sets of power structures 42, the two mounting plates 111 and the lever 2 together, and the elastic member 5 is provided with a hook hung on a side edge of one of the mounting plates 111.

Further, one side of the power structure 42 of the two indicating units is connected through a positioning plate 46, and when the operating mechanism 7 is disconnected, the elastic piece 5 drives the positioning plate 46 to abut against the mounting plate 111 to be in limit fit, so that the indicating piece 4 is kept still and the indicating mark 44 corresponding to the disconnection is displayed in the indicating window 43.

Further, the indication structure 41 is in a cambered surface shape protruding towards one side far away from the power structure 42, the indication mark 44 is arranged on one side, far away from the power structure 42, of the indication structure 41, and in the rotating process of the indication member 4, the distance from one side, far away from the indication structure 41, of the indication structure 41 to the indication window 43 is unchanged, so that the dustproof effect can be achieved.

Further, the coupling plate 25 and the second blocking portion 22 of the lever 2 are oppositely disposed at two sides of the indicator 4, and the second blocking portion 22 is provided with a first avoiding groove 47 for avoiding the positioning plate 46.

As shown in fig. 2, the handle 71 includes a rocker arm 711 and two connection handles 712 connected to the rocker arm 711, one ends of the two connection handles 712 away from the rocker arm 711 are connected to the operation handle 713, a through hole 710 for forming the avoidance structure is defined between the two connection handles 712 and the operation handle 713, the rocker arm 711 is disposed in the switch housing 6 below the device housing 1, the operation handle 713 is disposed above the device housing 1, one ends of the two connection handles 712 are inserted into the switch housing 6 and connected to the rocker arm 711, one ends of the two connection handles 712 away from the rocker arm 711 extend to the upper side of the device housing 1 and are connected to the operation handle 713, and an operation shaft 7A matched with the locking device is disposed inside one of the connection handles 712 and is located in the avoidance structure. It will be appreciated that the lever 2 may be located on a side outside the handle 71, and the through hole 710 on the handle 71 is not required to be penetrated, the handle 71 is not provided with a protruding structure above the actuating shaft 7A, and the space above the actuating shaft 7A may form a avoiding structure for avoiding the lever 2.

Further, be equipped with the grafting structure on the device casing 1, be equipped with slot structure and spout 63 on the switch casing 6 respectively, when device casing 1 slides along spout 63, can drive the grafting structure and insert the spacing cooperation in the grafting structure. The locking device and/or the indicating device are fitted as a separate module to the switch housing 6 of the load break switch.

Specifically, as shown in fig. 6, the device housing 1 includes two opposite side plates 15, and a top plate 13 connected between the two side plates 15, one ends of the two side plates 15 and the top plate 13 are connected by a baffle plate 14, the lever 2 and the indicator 4 are respectively mounted on the inner side of the top plate 13, the lock plate 3 is slidably mounted on the baffle plate 14, that is, the lock plate 3 is slidably disposed along the side wall of the device housing 1, the top plate 13 is provided with an indication window 43, one end of the top plate 13 far away from the baffle plate 14 is provided with a plugging structure, the switch housing 6 is provided with a top plate 64 opposite to the baffle plate 14, the top plate 64 is provided with a slot structure corresponding to the plugging structure, the switch housing 6 includes two half-housings 61 opposite to each other, the two half-housings 61 are respectively provided with a guide plate 62, the outside of the guide plate 62 is respectively provided with a sliding groove 63, the device housing 1 can be sleeved on the guide plate 62 and is inserted onto the switch housing 6 along the sliding groove 63, the guide plate 62 is provided with a first mounting hole 651 matched with the mounting screw 65, the side plate 15 is provided with a second mounting hole 652 matched with the mounting screw 65, the mounting screw 65 respectively penetrates through the first mounting hole 651 and the second mounting hole 652 to fix the device housing 1 and the switch housing 6, the inserting structure of the embodiment comprises a first inserting plate 131 and two second inserting plates 132, the inserting groove structure comprises a first inserting groove 641 corresponding to the first inserting plate 131 and a second inserting groove 642 corresponding to the two second inserting plates 132, and the first inserting plate 131 is inserted into the first inserting groove 641 after penetrating through the inner sides of the two connecting handles 712 of the handle 71 during assembly.

As shown in fig. 9-11, the locking plate 3 is slidably mounted on the baffle 14 and connected with a limit spring 33, the limit spring 33 drives the locking plate 3 to move into the device housing 1 and abut against the device housing 1 to limit, while the lever 2 is locked by the locking shaft 7B on the handle 71 during closing, so as to lock the locking plate 3 in the device housing 1, the lever 2 and the locking plate 3 can freely move during opening, the limit spring 33 can limit the locking plate 3 in the limit device housing 1, the locking plate 3 is pulled out when the locking is needed, the locking plate 3 is locked by the locking piece 350, the lever 2 is locked by the operating mechanism 7, and the load break switch cannot be closed.

Specifically, the baffle 14 includes an inner baffle 141 and two outer baffles 142 respectively disposed at one side of the inner baffle 141, a limiting slot for accommodating the lock plate 3 is formed between the two outer baffles 142, guide slots 143 are respectively formed between the two outer baffles 142 and the inner baffle 141, guide strips 34 inserted into the guide slots 143 and slidably engaged with each other are respectively disposed at two sides of the lock plate 3, a latch hole and an operation rib 36 are disposed at the top of the lock plate 3, the latch hole is configured to form the locking portion 32, the latch hole is used to connect with a latch 350, and after the latch hole is exposed from the device housing 1, the latch 350 can pass through the latch hole and be locked on the lock plate 3, so as to block the lock plate 3 from retracting into the device housing 1, thereby ensuring reliable locking. It will be appreciated that the lock 350 may be a padlock, a chain, or other locking mechanism; the locking portion 32 may also limit the movement of the locking plate 3 in other manners, for example, a snap structure is adopted, and a corresponding slot is provided at a predetermined position of the device housing 1, and the locking plate 3 is locked to retract by the snap structure, which falls within the protection scope of the present invention.

As shown in fig. 9-11, the top of the lock plate 3 is located in the limiting groove, the bottom of the lock plate 3 extends into the switch housing 6, the two half housings 61 of the switch housing 6 are respectively provided with a second limiting groove 66 matched with the bottom of the lock plate 3, and the length of the lock plate 3 can be effectively increased through the matching of the switch housing 6, so that the reliability of the lock plate 3 is ensured. Of course, the lengths of the lock plate 3 and the shutter 14 may be adjusted so that the lock plate 3 does not extend into the switch housing 6.

As shown in fig. 4, two transmission plates 35 are arranged on the inner side of the lock plate 3 in the embodiment, the coupling shaft 31 is connected between the two transmission plates 35, the coupling groove 21 is in a U shape, and the coupling groove 21 can be inserted between the two transmission plates 35 and sleeved on the coupling shaft 31;

the lock plate 3 is provided with spring plates 6 at the outer sides of the two transmission plates 35, spring grooves 37 corresponding to the spring plates 6 are arranged in the device housing 1, limiting springs 33 are respectively arranged between each group of corresponding spring plates 6 and the spring grooves 37, and two ends of each limiting spring 33 are respectively limited with the corresponding spring plates 6 and the corresponding spring grooves 37.

As shown in fig. 6-7, the spacing spring 33 and the lock plate 3 are spaced to form a space for avoiding the inner baffle 141, the inner baffle 141 can be inserted between the spacing spring 33 and the lock plate 3 and is in spacing fit with the spring plate 6 on the lock plate 3 for connecting the spacing spring 33, the inner baffle 141 blocks the lock plate 3 from leaving the device housing 1 through spacing the spring plate 6 to prevent the lock plate 3 from falling off, a second guide groove 144 is arranged in the middle of the inner baffle 141, and the coupling shaft 31 and the two transmission plates 35 are positioned in inner side sliding fit with the second guide groove 144.

The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments disclosed herein. It should be understood that those skilled in the art to which the present invention pertains may make several simple deductions or substitutions without departing from the inventive concept, and should be considered as falling within the scope of the present invention.

Claims (10)

1. A locking device characterized by: comprising the following steps:

an operating mechanism (7), wherein the operating mechanism (7) is provided with a handle (71), and a first blocking part is arranged on the handle (71);

the lever (2) is rotationally connected with the device shell (1), and the lever (2) is provided with a second blocking part (22) and a first coupling part;

a lock plate (3), wherein a second coupling part and a locking part (32) are arranged on the lock plate (3);

when the operating mechanism (7) is at the opening position, the locking plate (3) is moved to be matched with the first coupling part of the lever (2) through the second coupling part, the lever (2) is driven to rotate, the second blocking part (22) of the lever (2) abuts against the first blocking part of the handle (71), and the operating mechanism (7) is blocked to be closed.

2. The locking device of claim 1, wherein: the locking part (32) of the locking plate (3) can move between the inside and the outside of the device shell (1), the operating mechanism (7) enables the locking part (32) to move to the outer side of the device shell (1) when in a brake separating position and is used for arranging a locking piece (350), and meanwhile, the locking plate (3) drives the lever (2) to rotate, so that the second blocking part (22) of the lever (2) abuts against the first blocking part of the handle (71).

3. The locking device of claim 1, wherein: the handle (71) is provided with an avoidance structure, and when the operating mechanism (7) is at a closing position, the handle (71) is in avoidance with a second blocking part (22) of the lever (2) through the avoidance structure.

4. The locking device of claim 2, wherein: the lock plate (3) is connected with a limit spring (33), and the limit spring (33) drives the lock plate (3) to move into the device shell (1).

5. The locking device of claim 1, wherein: the lever (2) comprises a locking plate (23), and when the operating mechanism (7) is in a closing position, the locking plate (23) is blocked by the handle (71) when the operating mechanism is closed, so that the lever (2) cannot rotate and the locking plate (3) is blocked from moving.

6. The locking device of claim 1, wherein: the rotation plane of the lever (2) is parallel to the rotation plane of the handle (71).

7. The locking device of claim 1, wherein: the locking plate (3) is arranged along the side wall of the device shell (1) in a sliding way.

8. The locking device of claim 1, wherein: the first coupling part is a coupling shaft (31) arranged on one side of the lock plate (3), the second coupling part is a coupling groove (21) sleeved on the coupling shaft (31), and the side wall of the coupling groove (21) is pushed by the coupling shaft (31) to drive the lever (2) to rotate when the lock plate (3) moves.

9. The locking device of claim 1, wherein: the first blocking part is an action shaft (7A) arranged on the handle (71), one end of the second blocking part (22) is connected with the rotation center of the lever (2), and one end of the second blocking part (22) far away from the rotation center of the lever (2) is used for blocking the action shaft (7A).

10. A load break switch comprising a switch housing (6) and an operating mechanism (7) and at least one phase circuit arranged in the switch housing (6), said phase circuit comprising a contact system and a fuse (9), characterized in that: a locking device according to any one of claims 1-9, the device housing (1) of which is mounted on the switch housing (6).