CN217008979U - Interlocking mechanism for preventing misoperation - Google Patents

Abstract

The utility model relates to the technical field of circuit breakers, in particular to a linkage mechanism for preventing misoperation. A interlock mechanism for preventing a malfunction, comprising: the valve is assembled in a vertical sliding mode, the valve slides to open and close the driving end of the driving shaft of the isolating switch, and a first driving surface is formed on the valve; the first blocking piece is assembled in a horizontally sliding mode, and when the valve moves downwards and is opened, the first driving surface of the valve pushes the first blocking piece to move towards the direction far away from the valve so as to block a closing button of the circuit breaker. The technical problem of the operating sequence of isolator and circuit breaker takes place the maloperation among the prior art, leads to equipment to damage, brings the potential safety hazard is solved.

Description

Interlocking mechanism for preventing misoperation

Technical Field

The utility model relates to the technical field of circuit breakers, in particular to a linkage mechanism for preventing misoperation.

Background

The vacuum circuit breaker refers to a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition within a prescribed time. The isolating switch is mainly used for reliably isolating a part needing power failure from a live part in the high-voltage distribution device so as to ensure the safety of maintenance work.

In the actual operation of the vacuum circuit breaker, the operation on the circuit breaker and the operation on the isolating switch have a certain sequence, and if the vacuum circuit breaker is operated to be opened, the circuit breaker is required to be operated to be opened firstly, and then the isolating switch is operated to be opened; when the vacuum circuit breaker is operated to switch on, the disconnecting switch needs to be operated to switch on, and then the circuit breaker needs to be operated to switch on. Once the operation sequence is not right, if under the condition that the isolating switch is not switched on, the circuit breaker is switched on by misoperation, the position of the isolating switch is easy to generate electric arc, the equipment is easy to damage, and great potential safety hazard is also brought.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems that equipment is damaged and potential safety hazards are caused due to misoperation of an operation sequence of a disconnecting switch and a circuit breaker in the prior art, the utility model provides a linkage mechanism for preventing misoperation, and the technical problems are solved. The technical scheme of the utility model is as follows:

a interlock mechanism for preventing erroneous operation, comprising:

the valve is assembled in a vertical sliding mode, the valve slides to open and close the driving end of the driving shaft of the isolating switch, and a first driving surface is formed on the valve;

the first blocking piece is assembled in a horizontally sliding mode, and when the valve moves downwards and is opened, the first driving surface of the valve pushes the first blocking piece to move towards the direction far away from the valve so as to block a closing button of the circuit breaker.

According to the utility model, by arranging the interlocking mechanism for preventing misoperation, when the valve is pushed to slide to open the driving end of the driving shaft of the isolating switch so as to perform switching-on operation on the isolating switch, the sliding of the valve can drive the second blocking piece to slide to block the switching-on button of the circuit breaker, so that the circuit breaker cannot perform switching-on operation, and thus, the condition that the circuit breaker is switched on due to misoperation before the switching-on operation is performed on the isolating switch is avoided, and the equipment is prevented from being damaged.

According to one embodiment of the present invention, the shutter is in the initial position by the reset member, and the first blocking member is reset by the first reset member.

According to one embodiment of the utility model, the breaker further comprises a second catch, the second catch is vertically slidably assembled, and the main shaft of the breaker can rotate to push the second catch to vertically slide.

According to one embodiment of the utility model, the second blocking piece extends to form a limiting part, a crank arm is assembled on the main shaft of the circuit breaker, and the limiting part is lapped on the crank arm.

According to an embodiment of the present invention, the second shutter and the shutter are locked to each other by a locking member.

According to one embodiment of the utility model, a second driving surface extends on the shutter, the locking member is horizontally assembled in a sliding manner, one end of the locking member abuts against the second driving surface, and the other end of the locking member and the second stop member limit each other.

According to one embodiment of the utility model, a limiting notch is formed on one side of the second stopper close to the locking piece, when the circuit breaker is switched on, the main shaft of the circuit breaker pushes the second stopper to slide upwards through a crank arm, the second stopper limits the locking piece to be positioned on the right side, and the locking piece abuts against the valve to keep the valve in a closed state; when the valve is opened downwards, the valve pushes the locking piece to horizontally slide into the limiting notch of the second blocking piece through the second driving surface, the locking piece limits the second blocking piece to be positioned at the lowest part, and the limiting part of the second blocking piece compresses the crank arm to enable the circuit breaker to keep the opening state.

According to one embodiment of the utility model, the limit notches are square limit notches.

According to one embodiment of the utility model, the blocking element is reset by the action of a second resetting element.

According to an embodiment of the utility model said first drive surface and/or said second drive surface are concave double-bevelled.

Based on the technical scheme, the utility model can realize the following technical effects:

1. according to the interlocking mechanism for preventing misoperation, when the valve is pushed to slide to open the driving end of the driving shaft of the isolating switch so as to perform switching-on operation on the isolating switch, the sliding of the valve can drive the first stopper to slide to the switching-on button for shielding the circuit breaker, so that the circuit breaker cannot perform switching-on operation, and therefore the condition that the circuit breaker is switched on due to misoperation before the switching-on operation is performed on the isolating switch is avoided, and equipment is prevented from being damaged; in addition, a reset piece and a first reset piece are arranged, the valve can reset under the action of the reset piece, and the first blocking piece resets under the action of the first reset piece;

2. the interlocking mechanism for preventing misoperation is provided with a second stopper, wherein a limiting part extends from the second stopper, the limiting part is lapped on a crank arm on a main shaft of the circuit breaker, and the second stopper can limit the rotation of the main shaft of the circuit breaker or the main shaft of the circuit breaker rotates to push the second stopper to vertically slide; when the valve slides downwards to open the driving shaft, on one hand, the valve drives the first blocking part to block the closing button through the first driving surface, so that the closing button cannot be pressed down; on the other hand, the valve drives the locking piece to extend into the limiting notch of the second blocking piece, the second blocking piece cannot slide upwards, the limiting part of the second blocking piece presses the crank arm on the main shaft of the circuit breaker, so that the main shaft of the circuit breaker cannot rotate to be switched on, and the circuit breaker keeps a switching-off state and cannot be switched on by the double action of the first blocking piece and the second blocking piece when the isolating switch is switched on; on the contrary, when the breaker is switched on, the main shaft of the breaker rotates, the second blocking piece is pushed by the crank arm to move upwards, the second blocking piece blocks the locking piece from the left side of the locking piece, the locking piece is tightly pressed on the second driving surface of the valve, and the valve cannot descend to open the driving end of the driving shaft, so that the breaker needs to be switched off firstly and then the isolating switch needs to be switched off when the switching-off operation is carried out;

3. according to the interlocking mechanism for preventing misoperation, the first driving surface and/or the second driving surface are/is a concave double-inclined surface, so that the lifting motion of the valve can generate a horizontal pushing force on the first blocking piece and the locking piece, and further a locking limiting effect is generated.

Drawings

Fig. 1 is a schematic view of a structure in which an interlock mechanism of the present invention is assembled in a circuit breaker;

FIG. 2 is a schematic structural view of the interlocking mechanism;

FIG. 3 is a schematic structural diagram of a shutter;

FIG. 4 is a schematic structural view of a first stopper;

FIG. 5 is a schematic structural view of a second stopper;

FIG. 6 is a schematic structural view of the locking member;

FIG. 7 is a schematic view of the mounting plate;

FIG. 8 is a state view of the mounting plate engaged with the drive shaft of the disconnector;

FIG. 9 is a side view of the mounting plate engaging the drive shaft of the isolation switch;

in the figure: 1-a valve; 11-a first driving surface; 12-a second drive face; 13-a first slide hole; 14-a toggle part; 2-a first stopper; 21-a first abutment; 22-a shield; 23-a second slide hole; 3-a second stop; 31-a limiting part; 32-an extension; 33-a third slide hole; 34-a limit notch; 4-a lock; 41-a second abutment; 42-a locking part; 43-fourth slide hole; 5, mounting a plate; 51-a through hole; 52-a limiting hole; 6-a drive shaft; 61-a drive end; 7-a closing button; 8-a main shaft; 81-crank arm; 9-opening button; 10-shell.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

As shown in fig. 1 to 9, the present embodiment provides an interlocking mechanism for preventing misoperation, which is disposed between a circuit breaker and a disconnector, and the interlocking mechanism is configured to enable the circuit breaker and the disconnector to operate in sequence, thereby preventing equipment damage caused by misoperation. The interlocking mechanism comprises a valve 1, a first blocking piece 2 and a second blocking piece 3, the valve 1 slides up and down to open and close a through hole 51 in the mounting plate 5, when the valve 1 slides downwards to open the through hole 51, the valve 1 simultaneously drives the first blocking piece 2 to slide to block a closing button 7 of the circuit breaker, and the second blocking piece 3 limits a main shaft 8 of the circuit breaker, so that the circuit breaker cannot be closed.

The shutter 1 is slidably mounted on the mounting plate 5, the shutter 1 being slidable in a vertical direction relative to the mounting plate 5. Specifically, two parallel first sliding holes 13 extending in the vertical direction are formed in the shutter 1, and screws can be fixed on the mounting plate 5 and extend into the two first sliding holes 13, so that the sliding assembly of the shutter 1 along the mounting plate 5 is realized. Furthermore, a reset element is provided, under the action of which the shutter 1 is in an initial position, in which the shutter 1 blocks the through-hole 51 in the mounting plate 5. In this embodiment, when the shutter 1 is set to slide downward to the lowest position, the through hole 51 is exposed, and the drive shaft 6 of the disconnecting switch can be driven to be closed.

The shutter 1 is formed with a first driving surface 11 and a second driving surface 12, the first driving surface 11 acts on the first stopper 2, and the second driving surface 12 acts on the second stopper 3 through the locking member 4.

As a preferred technical solution of this embodiment, the first driving surface 11 and the second driving surface 12 are both located at the side of the shutter 1, the first driving surface 11 and the second driving surface 12 may be configured as a double-slope structure with a concave middle, when the shutter 1 performs up-down sliding, the first driving surface 11 may provide an urging force in the horizontal direction for the first stopper 2, and the second driving surface 12 may provide an urging force in the horizontal direction for the locking member 4.

The first stopper 2 is slidably fitted on the mounting plate 5, and the first stopper 2 is slidable in a horizontal direction with respect to the mounting plate 5. Specifically, the first stopper 2 is formed with at least two second sliding holes 23, the second sliding holes 23 can extend horizontally, and the mounting plate 5 is provided with screws passing through the second sliding holes 23, so that the first stopper 2 can slide horizontally relative to the mounting plate 5.

As a preferable technical solution of the present embodiment, the first stopper 2 is assembled at one side of the shutter 1, one end of the second stopper 2 close to the shutter 1 is a first abutting portion 21, and the first abutting portion 21 abuts on the first driving surface 11; the other end of the second stopper 2 is a shielding part 22. When the shutter 1 slides downwards, the first driving surface 11 pushes the first stopper 2 to slide horizontally, and the shielding part 22 can just shield the closing button 7, so that an operator cannot press the closing button 7. Preferably, the end surface of the first abutment 21 that contacts the first drive surface 11 may be formed by an inclined surface and a rounded surface to ensure sliding contact of the first abutment 21 with the first drive surface 11.

As a preferable technical solution of this embodiment, a first resetting member is further provided, the first abutting portion 21 of the first stopper 2 is kept abutting against the first driving surface 11 under the action of the first resetting member, one end of the first resetting member is connected to the mounting plate 5, the other end of the first resetting member is connected to the first stopper 2, and the first resetting member is kept in a stretching state. The first resetting member may be selected but not limited to a tension spring.

The valve 1 is mutually limited with the second blocking piece 3 through the locking piece 4. Specifically, the lock member 4 is assembled to slide horizontally, a fourth sliding hole 43 is formed in the lock member 4, at least two fourth sliding holes 43 extend horizontally, and a screw fixed to the mounting plate 5 passes through the fourth sliding hole 43, so that the lock member 4 can slide horizontally relative to the mounting plate 5. The locking piece 4 is positioned on one side of the second driving surface 11, one end of the locking piece 4 close to the second driving surface 11 forms a second abutting part 41, and the second abutting part 41 abuts against the second driving surface 11; the other end of the locking member 4 is a locking portion 42 for locking with the second stopper 3.

As a preferable technical solution of the present embodiment, a second resetting member is further provided, the second abutting portion 41 of the locking member 4 is kept abutting against the second driving surface 11 under the action of the second resetting member, one end of the second resetting member may be connected to the mounting plate 5, the other end of the second resetting member may be connected to the locking member 4, and the second resetting member is kept in a stretching state. The second resetting member may be selected but not limited to a tension spring.

The second baffle 3 is assembled by vertical sliding, a third slide hole 33 is formed in the second baffle 3, the third slide hole 33 extends vertically at least two, and a screw fixed on the mounting plate 5 penetrates through the third slide hole 33, so that the second baffle 3 can slide vertically relative to the mounting plate 5. The second stopper 3 extends to a limiting portion 31, the limiting portion 31 extends to the main shaft 8 of the circuit breaker, and when the circuit breaker is switched on, the main shaft 8 rotates to act on the limiting portion 31 and push the second stopper 3 to slide upwards to limit the locking member 4.

As a preferred solution of this embodiment, the limiting portion 31 extends horizontally, correspondingly, the main shaft 8 of the circuit breaker is equipped with a crank arm 81, and the limiting portion 31 can be hitched on the crank arm 81 to realize the limiting and following functions.

As a preferred technical solution of this embodiment, a limiting notch 34 is formed at one side of the upper end of the second stopper 3 close to the locking member 4, the locking member 4 can horizontally slide and extend into the limiting notch 34, and the second stopper 3 is limited so that the second stopper 3 cannot slide upwards, and further the crank arm 81 on the spindle 8 is pressed and the spindle 8 is limited. After the second stopper 3 slides upwards, the locking member 4 cannot extend into the limiting notch 34, and the second stopper 3 can block the locking member 4, so that the second abutting part 41 of the locking member 4 is pressed on the second driving surface 11, and the shutter 1 cannot descend to open the through hole 11. Preferably, the limit notches 34 are square.

As a preferred technical solution of this embodiment, an extending portion 32 is further formed at the upper end of the second stopper 3, correspondingly, a limiting hole 52 is formed on the mounting plate 5, the limiting hole 52 extends vertically, and the extending portion 32 extends into the limiting hole 52 and slides along the limiting hole 52, so as to limit the sliding range of the second stopper 3.

The mounting plate 5 is assembled in the shell 10, the breaker and the disconnecting switch are assembled in the shell 10, the closing button 7 and the opening button 9 are assembled in the shell 10 side by side, a through hole 51 is formed in the mounting plate 5, the through hole 51 is over against a driving end 61 of a driving shaft 6 of the disconnecting switch, and the through hole 51 is covered when the valve 1 is at an initial position, so that an operator cannot operate the driving shaft 6, and the closing of the disconnecting switch is realized; valve 1 moves down, can make through-hole 51 expose, and operating personnel accessible twist grip stretches into and is connected with drive end 61, and then drive isolator's drive shaft 6 carries out isolator's switching-on operation.

Through the interlocking mechanism with the structure, the switching-on operation of the isolating switch can be firstly carried out when the switching-on operation is carried out on the vacuum circuit breaker, and the circuit breaker can be switched on; when the vacuum circuit breaker is subjected to opening operation, the opening operation of the circuit breaker is firstly carried out, and then the disconnecting switch can be subjected to opening. The operation sequence is ensured, and the occurrence of misoperation is prevented.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. A interlock mechanism for preventing a malfunction, comprising:

the valve (1) is assembled in a vertical sliding mode, the valve (1) slides to open and close a driving end (61) of a driving shaft (6) of the isolating switch, and a first driving surface (11) is formed on the valve (1);

the first stopper (2) is horizontally assembled in a sliding mode, when the valve (1) moves downwards and is opened, the first driving surface (11) of the valve (1) pushes the first stopper (2) to move towards the direction far away from the valve (1) so as to shield a closing button (7) of the circuit breaker.

2. A locking mechanism against malfunctioning according to claim 1, wherein said shutter (1) is in an initial position under the action of a resetting member, said first stop (2) being reset under the action of a first resetting member.

3. A locking mechanism for preventing misoperation according to claim 1, further comprising a second catch (3), wherein the second catch (3) is vertically slidably mounted, and the main shaft (8) of the circuit breaker is capable of rotating to push the second catch (3) to vertically slide.

4. A interlock mechanism for preventing misoperation according to claim 3, wherein the second catch (3) extends to form a limit portion (31), a crank arm (81) is assembled on the breaker main shaft (8), and the limit portion (31) is lapped on the crank arm (81).

5. A locking mechanism against malfunctioning according to claim 3, wherein said second stop (3) is locked to said shutter (1) by means of a locking member (4).

6. A locking mechanism for preventing misoperation according to claim 5, wherein a second driving surface (12) extends on the shutter (1), the locking member (4) is horizontally slidably assembled, one end of the locking member (4) abuts against the second driving surface (12), and the other end of the locking member (4) and the second stopper member (3) are mutually limited.

7. The interlocking mechanism for preventing misoperation according to claim 6, wherein a limiting notch (34) is formed on one side of the second stopper (3) close to the locking member (4), when the circuit breaker is switched on, the main shaft (8) of the circuit breaker pushes the second stopper (3) to slide upwards through a crank arm (81), the second stopper (3) limits the locking member (4) to be positioned on the right side, and the locking member (4) abuts against the valve (1) to keep the valve (1) in a closed state; when the valve (1) is opened downwards, the valve (1) pushes the locking piece (4) to horizontally slide into the limiting notch (34) of the second stopper (3) through the second driving surface (12), the locking piece (4) limits the position of the second stopper (3) to be positioned at the lowest part, and the limiting part (31) of the second stopper (3) compresses the crank arm (81) to enable the circuit breaker to keep the opening state.

8. A mis-operation prevention interlock mechanism as claimed in claim 7, wherein the limit notch (34) is a square limit notch.

9. A locking mechanism against malfunctioning according to claim 5, wherein the locking member (4) is reset by a second reset member.

10. A mis-operation prevention interlocking mechanism as claimed in claim 6, wherein the first driving surface (11) and/or the second driving surface (12) is/are concave double-inclined.

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