CN213936026U - Locking device of grounding switch and grounding switch assembly - Google Patents

Abstract

The utility model provides a locking device and ground connection switch subassembly of ground connection switch. Locking device of ground switch, including: the locking piece is arranged on the grounding disconnecting link; the locking assembly is in a locking state, the locking assembly locks the locking piece, and when the locking assembly is in an unlocking state, the locking assembly is separated from the locking piece to unlock the locking piece, so that the grounding disconnecting link can be kept in an opening state or a closing state. The utility model provides an among the prior art locking device of ground connection switch not possess prevent the mistake function, suffer violence unblock destruction easily and can't carry out the problem monitored to the branch combined floodgate state.

Description

Locking device of grounding switch and grounding switch assembly

Technical Field

The utility model relates to a switch equipment field particularly, relates to a blocking device and ground connection switch subassembly of ground connection switch.

Background

At present, in the track traffic field, before the operation personnel overhaul the maintenance to rail vehicle at the vehicle section, need cut off the power supply to the contact net to carry out ground connection to the contact net, in order to ensure maintainer's life safety. At present, the grounding product means in the rail transit field comprise modes of visually remotely operating an electric grounding device, manually hanging a ground wire through a contact net and the like. In the field of rail electrification, the visual remote electric grounding device is widely applied, but the equipment cost is higher, and meanwhile, the visual remote electric grounding device relates to remote communication and the like, so that the installation and debugging cost is high. If the mode that the contact net manually hitches the ground wire is adopted, the efficiency is low, and particularly, a long grounding rod needs to be lifted manually to be hung on the contact net, so that the operation is inconvenient. In order to solve the problem, a grounding device is required in some engineering applications, the cost is lower than that of a visual intelligent grounding cabinet, and the operation is more convenient than manual hanging of a contact net. In order to meet the requirements, a locking device of the manual grounding disconnecting link needs to be designed, the cost is low, and the operation is simple and convenient. Generally, a locking device of a manual grounding disconnecting link needs to be designed to be locked, manual switching-on and switching-off operations are prevented, and potential safety hazards are avoided. The locking device of the traditional manual grounding knife switch at present has the following problems:

1. at present, the locking device of the manual grounding disconnecting link adopts pure mechanical locking such as a bolt for opening and locking after closing, so that the conditions of forgetting locking and the like exist for an operator, and the locking control is completely carried out manually.

2. The manual knife switch is also commonly in an electromagnetic locking mode, and electronic faults are easy to occur due to the fact that most electromagnetic locks adopt modes such as solenoids. And the solenoid belongs to a precise device, the bearing force is limited, and once a large external force acts on the solenoid, the limiting rod of the solenoid is easy to bend or the mechanical action is easy to lose efficacy.

3. The manual knife switch is locked by adopting the traditional purely mechanical padlock, and the opening and closing states of the locking device of the grounding knife switch cannot be judged in real time and monitored remotely.

Therefore, the locking device of the grounding knife switch in the prior art has the problems that the locking device does not have the anti-misoperation function, is easy to suffer from violent unlocking damage and cannot monitor the switching-on state.

SUMMERY OF THE UTILITY MODEL

A primary object of the utility model is to provide a locking device and ground connection switch assembly of ground connection switch to the locking device of ground connection switch does not possess the problem of preventing the mistake function among the solution prior art, suffers violence unblock destruction easily and can't monitor to the switching-on state.

In order to achieve the above object, according to an aspect of the present invention, there is provided a locking device of a grounding switch, comprising: the locking piece is arranged on the grounding disconnecting link; the locking assembly is in a locking state, the locking assembly locks the locking piece, and when the locking assembly is in an unlocking state, the locking assembly is separated from the locking piece to unlock the locking piece, so that the grounding disconnecting link can be kept in an opening state or a closing state.

Further, the locking piece has an opening position and a closing position, when the earthing knife-switch is in the opening state, the locking piece is in the opening position, when the earthing knife-switch is in the closing state, the locking piece is in the closing position, at least two locking holes are arranged on the locking piece, and when the locking piece is in the opening position or the closing position, at least one part of the locking assembly can respectively extend into the different locking holes to lock the locking piece in the opening position or the closing position.

Furthermore, the locking piece is plate-shaped arc structure, and the extending direction mutually perpendicular at plate-shaped arc structure's both ends, and the locking hole is two, and two locking holes set up respectively at plate-shaped arc structure's both ends.

Further, the locking device of the grounding disconnecting link further comprises an induction piece and a detection piece, the induction piece is arranged at one end of the plate-shaped arc-shaped structure, and the detection piece is arranged on the locking assembly, so that the detection piece and the induction piece are induced when the locking piece is located at the switching-off position or the switching-on position.

Further, the latch assembly includes: a lock case; the locking pin is movably arranged inside the lock shell and has a locking position and an unlocking position, and when the locking pin is in the locking position, one end of the locking pin can extend out of the lock shell and pass through the locking hole of the locking piece so as to lock the locking piece in the opening position or the closing position; the first piece that resets, the one end and the latching round pin butt of first piece that resets, the other end and the lock shell butt of first piece that resets provide the reset force that switches to the unblock position by the shutting position for the latching round pin.

Further, the locking assembly further comprises: the limiting pin is provided with a limiting position and a yielding position, and when the limiting pin is located at the limiting position, the locking pin is limited at the locking position by the limiting pin; the unlocking rotating shaft is provided with a driving groove at one end of the limiting pin, which is far away from the locking pin, and a driving bulge matched with the driving groove, at least one part of the driving bulge extends into the driving groove, and when the unlocking rotating shaft rotates, the driving bulge can drive the limiting pin to be switched to a yielding position from a limiting position; the second resets, and the second resets one end and the spacer pin butt of piece, and the second resets the other end and the lock shell butt of piece for the spacer pin provides by the reset power that the position of stepping down switched to the limiting position.

Furthermore, the circumferential outer side wall of one end, close to the limit pin, of the locking pin is provided with a stopping bulge, and when the limit pin is in the abdicating position and the locking pin is in the unlocking position, the stopping bulge is abutted to the limit pin so that the limit pin is kept in the abdicating position.

Further, the driving protrusion is eccentrically arranged on the unlocking rotating shaft; and/or the movement directions of the locking pin and the limiting pin are mutually vertical; and/or the locking pin is parallel to the unlocking rotating shaft; and/or the limiting pin is perpendicular to the locking pin and the unlocking rotating shaft respectively.

Furthermore, one end of the limiting pin, which is far away from the locking pin, is provided with a tangent section, and the driving groove is arranged on the tangent section.

Furthermore, the locking device of the grounding switch further comprises a computer key, the lock shell is provided with an unlocking hole, the unlocking rotating shaft is movably arranged inside the unlocking hole, the unlocking end of the computer key can extend into the unlocking hole, and the end, away from the limiting pin, of the unlocking rotating shaft is provided with an unlocking protrusion matched with the unlocking end.

Furthermore, the locking assembly further comprises a first limiting column, the unlocking end is provided with a limiting groove matched with the first limiting column, and when the limiting pin is located at the abdicating position, the first limiting column is clamped with the limiting groove to limit the unlocking end to exit from the unlocking hole.

Furthermore, the locking assembly further comprises a second limiting column arranged inside the lock shell, one end of the second limiting column is connected with the lock shell, the circumferential side wall of one end, away from the limiting pin, of the unlocking rotating shaft is provided with an annular groove, and the other end of the second limiting column extends into the annular groove to limit the unlocking rotating shaft to move axially along the unlocking rotating shaft.

Furthermore, the first limiting column and the second limiting column are parallel to each other.

According to another aspect of the utility model, still provide a ground connection switch subassembly, including the blocking device of foretell ground connection switch.

Furthermore, the grounding knife switch of the grounding knife switch assembly comprises a mounting plate, a knife switch and an operating handle, wherein the knife switch and the operating handle are movably arranged on the mounting plate, and one end of the operating handle penetrates through the mounting plate and drives the knife switch to be switched between a switch-off state and a switch-on state; the locking piece of the locking device is arranged on the front surface of the mounting plate, and the locking piece is fixed on the operating handle; a latch assembly is disposed on the back of the mounting plate and is capable of passing through the mounting plate to lock the locking member.

Use the technical scheme of the utility model, the blocking device of ground connection switch in this application includes locking piece and shutting subassembly. The grounding knife switch is arranged on the grounding knife switch; the locking assembly has a locking state and an unlocking state, when the locking assembly is in the locking state, the locking assembly locks the locking piece, and when the locking assembly is in the unlocking state, the locking assembly is separated from the locking piece, so that the locking piece is unlocked, and the grounding disconnecting link can be kept in an opening state or a closing state.

By using the locking device of the grounding disconnecting link with the structure, when an operator needs to perform switching-on and switching-off operation on the locking device of the grounding disconnecting link, the locking component needs to be unlocked firstly, and after the locking component is switched from the locking state to the unlocking state, the operator can switch the state of the disconnecting link. After the disconnecting link is switched to the disconnecting link state or the closing state, the locking piece can be locked through the locking assembly, so that the disconnecting link can be prevented from being driven by the operating handle to rotate, the state of the disconnecting link is prevented from being switched, and the disconnecting link can be kept in the current state. That is to say, the state of the disconnecting link can be switched only after the locking component is unlocked, and misoperation on the locking device of the grounding disconnecting link can be effectively prevented.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural diagram of a knife switch of a locking device of a grounding knife switch in the application in a closing state;

fig. 2 shows a schematic structural diagram of a knife switch of a locking device of the grounding knife switch in the application in a switching-off state;

fig. 3 is a schematic view showing a positional relationship between an operating handle and a latch assembly of the latch device of the earthing switch in the present application;

FIG. 4 is a schematic diagram illustrating the positional relationship between the locking member of the locking device of the earthing switch and the switch;

fig. 5 shows an exploded view of a blocking assembly of the blocking device of the earthing switch in the present application;

fig. 6 is a schematic diagram illustrating a positional relationship between a locking pin, a stopper pin, and an unlocking rotary shaft of a locking device of the earthing switch according to the present application;

FIG. 7 shows an enlarged view at A in FIG. 6;

fig. 8 shows a schematic structural view of an unlocking spindle of a locking assembly of a locking device of the earthing switch in the present application;

fig. 9 is a schematic diagram illustrating a positional relationship between a locking pin, a stopper pin, and an unlocking rotational shaft of a locking device of a grounding switch according to another embodiment of the present application;

fig. 10 shows an enlarged view at B in fig. 9.

Wherein the figures include the following reference numerals:

10. mounting a plate; 20. a disconnecting link; 30. an operating handle; 31. a rotating shaft; 40. a locking member; 41. a locking hole; 50. a locking assembly; 51. a lock case; 511. unlocking the hole; 52. a locking pin; 521. a stop projection; 53. a first reset member; 54. a spacing pin; 541. a drive slot; 542. cutting into sections; 55. unlocking the rotating shaft; 551. a drive boss; 552. an unlocking protrusion; 553. an annular groove; 56. a second reset member; 57. a first limit post; 58. a second limit post; 60. a sensing member; 70. a detection member; 80. a computer key; 81. an unlocking end; 811. and a limiting groove.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present application, where the contrary is not intended, the use of directional words such as "upper, lower, top and bottom" is generally with respect to the orientation shown in the drawings, or with respect to the component itself in the vertical, perpendicular or gravitational direction; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.

In order to solve the problem that the locking device of ground connection switch among the prior art does not possess the mistake function of preventing, suffers violence unblock destruction easily and can't monitor the partial switch-on state, this application provides a locking device and ground connection switch subassembly of ground connection switch.

The earthing switch assembly of the present application includes the following earthing switch locking device.

The earthing knife switch of the earthing knife switch assembly comprises a mounting plate 10, a knife switch 20 movably arranged on the mounting plate 10 and a manual operating device. The manual operation device comprises an operation handle 30 and a rotating shaft 31, wherein one end of the rotating shaft 31 penetrates through the mounting plate 10 and drives the disconnecting link 20 to switch between a disconnecting state and a closing state; the locking piece 40 of the locking device is arranged on one side of the mounting plate 10 close to the disconnecting link 20 of the grounding disconnecting link, and the locking piece 40 is fixed on the rotating shaft 31; a latch assembly 50 is provided on the side of the mounting plate 10 remote from the locking member 40 and the latch assembly 50 can pass through the mounting plate 10 to lock the locking member 40. Alternatively, the locking assembly 50 and the locking member 40 may be disposed on the same side of the mounting plate 10, or may be disposed on different sides, so long as the locking of the locking member 40 by the locking assembly 50 is achieved.

As shown in fig. 1 to 10, the locking device of the earthing switch in the present application includes a locking member 40 and a locking assembly 50. The locking piece 40 is arranged on one side of the mounting plate 10 of the grounding disconnecting link, which is close to the disconnecting link 20 of the grounding disconnecting link, and the locking piece 40 is fixedly connected with the rotating shaft 31 of the grounding disconnecting link; the locking assembly 50 is disposed on a side of the mounting plate 10 away from the locking member 40, and the locking assembly 50 has a locking state and an unlocking state, when the locking assembly 50 is in the locking state, at least a portion of the locking assembly 50 penetrates through the mounting plate 10 and locks the locking member 40, and the operating handle 30 cannot rotate the knife switch 20, so that the knife switch 20 is maintained in the opening state or the closing state.

With the adoption of the locking device of the grounding disconnecting link with the structure, when an operator needs to perform switching-on and switching-off operation on the locking device of the grounding disconnecting link, the locking component 50 needs to be unlocked firstly through a computer key, and after the locking component 50 is switched from the locking state to the unlocking state, the operator can switch the state of the disconnecting link 20. After the switch 20 is switched to the open state or the closed state, the locking member 40 can be locked by the locking member 50, so that the operating handle 30 is prevented from rotating the switch 20 and the state of the switch 20 is prevented from being switched, so that the switch 20 can be maintained in the current state. That is, the state of the knife switch 20 can be switched only after the locking assembly 50 is unlocked by the computer key, and the misoperation of the locking device of the grounding knife switch can be effectively prevented.

Specifically, the locking member 40 has an open position and a closed position, the locking member 40 is in the open position when the switch 20 is in the open state, the locking member 40 is in the closed position when the switch 20 is in the closed state, the locking member 40 is provided with at least two locking holes 41, and when the locking member 40 is in the open position or the closed position, at least a portion of the locking assembly 50 can be inserted into different locking holes 41 to lock the locking member 40 in the open position or the closed position, respectively. That is, in the present application, the movement of the operating handle 30, the rotating shaft 31, the locking member 40, and the knife switch 20 is synchronized, and the operating handle 30 can move the locking member 40 and the knife switch 20 at the same time. When the movement of the lock 40 is restricted, the movement of the operating handle 30 can be restricted by the lock 40, so that the operating handle 30 cannot be operated, and the disconnecting link 20 can be locked in the current state.

Alternatively, the locking member 40 has a plate-shaped arc structure, the extending directions of the two ends of the plate-shaped arc structure are perpendicular to each other, the number of the locking holes 41 is two, and the two locking holes 41 are respectively disposed at the two ends of the plate-shaped arc structure.

In one embodiment of the present application, as shown in fig. 4, the locking member 40 has a plate shape and has a curved coupling surface to which the rotation shaft 31 is coupled.

As shown in fig. 1, 2 and 5, the locking device of the earthing switch further includes a sensing member 60 and a detecting member 70, the sensing member 60 is disposed at one end of the plate-shaped arc structure, and the detecting member 70 is disposed on the locking assembly 50, so that the detecting member 70 senses the sensing member 60 when the locking member 40 is in the opening position or the closing position. Through the arrangement, the opening state and the closing state of the disconnecting link 20 can be monitored through the mutual matching of the sensing part 60 and the detecting part 70, so that the problem that the closing and opening state monitoring of the locking device of the grounding disconnecting link cannot be carried out in the prior art is solved.

In one embodiment of the present application, sensing element 60 is a magnetic steel and sensing element 70 is a dual code value chip.

As shown in fig. 5, the latch assembly 50 includes a latch housing 51, a latch pin 52, and a first restoring member 53. The lock housing 51 is disposed on a side of the mounting plate 10 remote from the locking member 40; the locking pin 52 is movably arranged inside the lock shell 51, a locking hole is arranged on the mounting plate 10, the locking pin 52 has a locking position and an unlocking position, when the locking pin 52 is in the locking position, one end of the locking pin 52 can extend out of the lock shell 51 and pass through the locking hole and the locking hole 41 of the locking piece 40 respectively so as to lock the locking piece 40 at the opening position or the closing position; one end of the first restoring member 53 abuts against the latching pin 52, and the other end of the first restoring member 53 abuts against the lock case 51, so as to provide the latching pin 52 with a restoring force for switching from the latching position to the unlatching position. Furthermore, the locking assembly 50 further comprises a limit pin 54 movably disposed inside the lock housing 51 and an unlocking rotation shaft 55. The limiting pin 54 has a limiting position and a yielding position, and when the limiting pin 54 is at the limiting position, the locking pin 52 is limited at the locking position by the limiting pin 54; one end of the limit pin 54, which is far away from the locking pin 52, is provided with a driving groove 541, the unlocking rotating shaft 55 is provided with a driving protrusion 551 which is matched with the driving groove 541, at least one part of the driving protrusion 551 extends into the driving groove 541, and when the unlocking rotating shaft 55 rotates, the driving protrusion 551 can drive the limit pin 54 to be switched from a limiting position to a yielding position; the second piece 56 that resets, the one end and the spacer pin 54 butt of the second piece 56 that resets, the other end and the lock shell 51 butt of the second piece 56 that resets for the spacer pin 54 provides by the reset power that the position of stepping down switches to the spacing position. In addition, the locking device of the grounding switch further comprises a computer key 80, the lock shell 51 is provided with an unlocking hole 511, the unlocking rotating shaft 55 is movably arranged inside the unlocking hole 511, the unlocking end 81 of the computer key 80 can extend into the unlocking hole 511, and one end, far away from the limiting pin 54, of the unlocking rotating shaft 55 is provided with an unlocking protrusion 552 matched with the unlocking end 81.

By means of the arrangement, when the locking component 50 is unlocked by using the computer key 80, the computer key 80 can drive the unlocking rotating shaft 55 to rotate, so that the driving protrusion 551 drives the limiting pin 54 to switch from the limiting position to the yielding position, at the moment, the limiting pin 54 releases the limitation on the locking pin 52, the locking pin 52 is switched from the locking position to the unlocking position and releases the limitation on the locking piece 40 under the action of the first resetting piece 53, and the operating handle 30 can drive the knife switch 20 to rotate and enable the knife switch 20 to switch between the opening state and the closing state.

In one embodiment of the present application, the end of the latching pin 52 remote from the locking member 40 is further provided with a pressing head, when it is required to switch the latching pin 52 from the unlocking position to the locking position, the position of the latching pin 52 can be switched by pressing the pressing head, and when the pressing head is pressed, the first restoring member 53 is compressed.

As shown in fig. 5, a circumferential outer side wall of one end of the latching pin 52 close to the stopper pin 54 has a stop projection 521, and when the stopper pin 54 is at the abdicating position and the latching pin 52 is at the unlocking position, the stop projection 521 abuts against the stopper pin 54 to keep the stopper pin 54 at the abdicating position. In addition, the locking assembly 50 further includes a first limiting post 57, the unlocking end 81 has a limiting groove 811 engaged with the first limiting post 57, and when the limiting pin 54 is at the abdicating position, the first limiting post 57 is engaged with the limiting groove 811 to limit the unlocking end 81 to exit the unlocking hole 511. Through the arrangement, when the locking pin 52 is located at the unlocking position, due to the abutting effect of the stop protrusion 521 and the limit pin 54, the limit pin 54 can only be kept at the yielding position, and the unlocking end 81 of the computer key 80 is limited at the moment, so that an operator can not directly take down the computer key 80 after unlocking the locking component 50 by using the computer key 80, and can only take down the computer key 80 from the locking component 50 after switching the locking pin 52 from the unlocking position to the locking position. Therefore, the locking device of the grounding knife switch can be effectively prevented from being operated by mistake.

It should be noted that, when the limit pin 54 is kept at the limit position, the movement of the limit pin 54 is limited, so that the unlocking shaft cannot rotate, and further the unlocking end 81 of the computer key 80 cannot rotate, so that the first limit post 57 is always engaged with the limit groove 811, and the computer key 80 cannot be removed.

Alternatively, the driving protrusion 551 is eccentrically provided on the unlocking rotation shaft 55. Through the arrangement, when the unlocking rotating shaft 55 rotates, the position of the driving protrusion 551 can be changed, so that the driving protrusion 551 can drive the limiting pin 54 to be switched from the limiting position to the yielding position.

Optionally, the latching pin 52 and the restraint pin 54 are perpendicular to each other in the direction of movement.

Optionally, the latching pin 52 and the unlocking rotation shaft 55 are parallel to each other.

Optionally, the limit pin 54 is perpendicular to the latching pin 52 and the unlatching pivot 55, respectively.

Alternatively, the end of the stopper pin 54 remote from the latching pin 52 has a cut section 542, and the driving groove 541 is provided on the cut section 542. In one embodiment of the present application, the end of the restraint pin 54 distal from the locking pin 52 has a cut extending axially therealong, thereby forming a cut segment 542. In addition, with such an arrangement, after the driving protrusion 551 extends into the driving groove 541, the end surface of the unlocking rotating shaft 55 having the end of the driving protrusion 551 can abut against the tangent plane of the stopper pin 54, thereby effectively improving the stability of connection between the unlocking rotating shaft 55 and the stopper pin 54. Moreover, the internal structure of the locking assembly 50 can be effectively ensured to be more compact by the arrangement.

Specifically, the locking assembly 50 further includes a second limiting post 58 disposed inside the lock housing 51, one end of the second limiting post 58 is connected to the lock housing 51, a circumferential side wall of one end of the unlocking rotating shaft 55 away from the limiting pin 54 is provided with an annular groove 553, and the other end of the second limiting post 58 extends into the annular groove 553 to limit the unlocking rotating shaft 55 to move along the axial direction thereof. Through setting up spacing post 58 of second, can carry on spacingly to the axial motion of unblock pivot 55 effectively to can prevent that unblock pivot 55 from droing from lock shell 51, and then guarantee effectively that the stability of shutting subassembly 50.

Preferably, the first restraint post 57 and the second restraint post 58 are parallel to each other.

It should be noted that, in the present application, the computer key 80 can read the code value of the binary code, and can send the code value change information of the binary code to the operation background, so as to feed back the operating state condition of the switch 20 to the system host in the background in real time.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

1. the knife switch is forcibly locked, so that an operator is forced to lock the knife switch after the knife switch is switched off or switched on, and the condition that the traditional bolt or mechanical lock is forgotten to lock is avoided;

2. the handle can bear larger handle impact force, and the reliability is better;

3. the problem of among the prior art locking device of earthing knife-switch do not possess prevent mistake function, suffer violence unblock destruction easily and can't monitor the divide-shut state is solved effectively.

It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to 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 is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (15)

1. A locking device for a grounding switch, comprising:

the locking piece (40), the said locking piece (40) is installed on spindle (31) of the earthing knife-switch;

the locking assembly (50) can be unlocked through a computer key (80), the locking assembly (50) has a locking state and an unlocking state, when the locking assembly (50) is in the locking state, the locking assembly (50) locks the locking piece (40), and when the locking assembly (50) is in the unlocking state, the locking assembly (50) is separated from the locking piece (40) so that the locking piece (40) is unlocked, and the grounding disconnecting link can be kept in an opening state or a closing state.

2. The grounding switch blocking device according to claim 1, characterized in that the locking member (40) has an open position and a closed position, the locking member (40) is located in the open position when the grounding switch is in the open state, the locking member (40) is located in the closed position when the grounding switch is in the closed state, at least two locking holes (41) are provided in the locking member (40), and at least a portion of the blocking assembly (50) can be respectively inserted into different locking holes (41) to lock the locking member (40) in the open position or the closed position when the locking member (40) is located in the open position or the closed position.

3. The locking apparatus of the earthing switch according to claim 2, wherein the locking member (40) is a plate-shaped arc structure, and the extending directions of both ends of the plate-shaped arc structure are perpendicular to each other, and the number of the locking holes (41) is two, and the two locking holes (41) are respectively provided at both ends of the plate-shaped arc structure.

4. The earthing switch blocking device according to claim 3, characterized in that, said earthing switch blocking device further comprises a sensing member (60) and a detecting member (70), said sensing member (60) is disposed at one end of said plate-like arc-shaped structure, said detecting member (70) is disposed on said blocking assembly (50) so that said detecting member (70) senses with said sensing member (60) when said locking member (40) is in said opening position or said closing position.

5. The earthing knife-switch blocking device according to claim 4, characterized in that said blocking assembly (50) comprises:

a lock case (51);

the locking pin (52), the locking pin (52) is movably arranged inside the lock shell (51), the locking pin (52) has a locking position and an unlocking position, when the locking pin (52) is in the locking position, one end of the locking pin (52) can extend out of the lock shell (51) and pass through the locking hole (41) of the locking piece (40) to lock the locking piece (40) in the opening position or the closing position;

the first reset piece (53), one end of the first reset piece (53) and the latching pin (52) are abutted, and the other end of the first reset piece (53) and the lock shell (51) are abutted so as to provide a reset force for the latching pin (52) to be switched from the latching position to the unlocking position.

6. Locking device of the earthing switch according to claim 5, characterized in that said locking assembly (50) further comprises, movably arranged inside said lock case (51):

a limit pin (54), wherein the limit pin (54) has a limit position and a yielding position, and when the limit pin (54) is in the limit position, the limit pin (54) limits the locking pin (52) in the locking position;

the unlocking rotating shaft (55), one end of the limiting pin (54) far away from the locking pin (52) is provided with a driving groove (541), the unlocking rotating shaft (55) is provided with a driving protrusion (551) matched with the driving groove (541), at least one part of the driving protrusion (551) extends into the driving groove (541), and when the unlocking rotating shaft (55) rotates, the driving protrusion (551) can drive the limiting pin (54) to be switched from the limiting position to the abdicating position;

the second resets piece (56), the second reset the one end of piece (56) with spacer pin (54) butt, the second reset the other end of piece (56) with lock shell (51) butt, for spacer pin (54) provide by the position of stepping down switches to the reset force of spacing position.

7. The locking device of the earthing knife-switch according to claim 6, characterized in that the circumferential outer wall of the locking pin (52) near one end of the limit pin (54) is provided with a stop protrusion (521), when the limit pin (54) is at the abdicating position and the locking pin (52) is at the unlocking position, the stop protrusion (521) is abutted with the limit pin (54) to keep the limit pin (54) at the abdicating position.

8. The grounding switch blocking device of claim 6,

the driving protrusion (551) is eccentrically arranged on the unlocking rotating shaft (55); and/or

The movement directions of the locking pin (52) and the limiting pin (54) are mutually perpendicular; and/or

The locking pin (52) and the unlocking rotating shaft (55) are parallel to each other; and/or

The limiting pin (54) is perpendicular to the locking pin (52) and the unlocking rotating shaft (55) respectively.

9. The earthing switch blocking device according to claim 6, characterized in that the end of the limit pin (54) away from the blocking pin (52) has a cut section (542), and the driving groove (541) is provided on the cut section (542).

10. The locking device of the grounding switch according to claim 7, wherein the lock housing (51) has an unlocking hole (511), the unlocking rotating shaft (55) is movably disposed inside the unlocking hole (511), the unlocking end (81) of the computer key (80) can extend into the unlocking hole (511), and the end of the unlocking rotating shaft (55) far away from the limiting pin (54) has an unlocking protrusion (552) engaged with the unlocking end (81); the computer key (80) can read the signal of the detection piece (70) and communicate with the operation background.

11. The locking device of the grounding switch according to claim 10, wherein the locking assembly (50) further comprises a first limiting post (57), the unlocking end (81) has a limiting groove (811) matched with the first limiting post (57), and when the limiting pin (54) is located at the abdicating position, the first limiting post (57) is clamped with the limiting groove (811) to limit the unlocking end (81) to exit the unlocking hole (511).

12. The locking device of the earthing knife-switch according to claim 11, characterized in that the locking assembly (50) further comprises a second limiting post (58) disposed inside the lock housing (51), one end of the second limiting post (58) is connected with the lock housing (51), the circumferential side wall of one end of the unlocking rotating shaft (55) far away from the limiting pin (54) is provided with an annular groove (553), and the other end of the second limiting post (58) extends into the annular groove (553) to limit the axial movement of the unlocking rotating shaft (55) along the annular groove (553).

13. Locking device of the earthing switch according to claim 12, characterized in that said first limiting column (57) and said second limiting column (58) are parallel to each other.

14. An earthing switch assembly, characterized in that it comprises a blocking device of an earthing switch according to any one of claims 1 to 13.

15. The earthing knife-switch assembly according to claim 14, characterized in that the earthing knife-switch of the earthing knife-switch assembly comprises a mounting plate (10), a knife-switch (20) movably arranged on the mounting plate (10) and an operating handle (30), one end of the operating handle (30) passes through the mounting plate (10) and drives the knife-switch (20) to switch between an open state and a closed state;

a locking piece (40) of the locking device is arranged on the front surface of the mounting plate (10), and the locking piece (40) is fixed on the operating handle (30);

the latch assembly (50) is disposed at a rear surface of the mounting plate (10), and the latch assembly (50) can pass through the mounting plate (10) to lock the locking member (40).

Images