CN111524741B - Knife switch locking device - Google Patents

Abstract

The invention provides a knife switch locking device. The knife switch locking device comprises: the lock seat is arranged on the periphery of the crank operating rod of the disconnecting link control box; the locking component is movably arranged in the locking seat and has a locking position and an unlocking position, and when the locking component is in the locking position, at least one part of the locking component can extend out of the locking hole and limit the crank so as to prevent the crank from being inserted into the crank operating rod; the limiting assembly is arranged in the lock seat and provided with a limiting position and an avoiding position, and when the limiting assembly is located at the limiting position, at least one part of the limiting assembly is abutted against the locking assembly so as to enable the locking assembly to be kept at the locking position; the first switch is electrically connected with the limiting assembly. The invention solves the problems that the locking device in the prior art is easy to have misoperation and unreliable.

Description

Knife switch locking device

Technical Field

The invention relates to the field of power equipment, in particular to a disconnecting link locking device.

Background

With the continuous development of the electric power automation technology, electric power automation devices such as an isolating switch cabinet and a grounding cabinet are increasingly widely applied in the fields of transformer substations, rail transit and the like. Electric isolation or grounding disconnecting links are arranged in the electric power automation devices. The motor rotates after being electrified, and the rotating shaft of the motor drives the disconnecting link to move after being decelerated by the gear reduction box, so that the disconnecting link realizes automatic switching-off or switching-on operation. Therefore, manual operation of operators is replaced, electric power automation is realized, and working efficiency is improved. Generally, manual operation is still required for debugging the knife switch and using the knife switch in emergency. For example, when the isolating or grounding device is powered off or the motor fails, the knife switch cannot operate, and in this special situation, the motor needs to be shaken by a manual crank to manually open or close the knife switch. When the isolating or grounding device retains the manual operating mechanism of the disconnecting link, the manual operating mechanism of the disconnecting link needs to be locked and managed. The disconnecting link manual operating mechanism is used for manually operating the disconnecting link under the normal working state of the isolating or grounding device, so that accidents are prevented from occurring.

At present, the common manual operating mechanism locking management methods mainly comprise the following two methods:

1) locking a knife switch operating chamber: the method comprises the following steps that an electromagnetic lock is installed on a cabinet door of a disconnecting link operating room, when a contact network is electrified, the electromagnetic lock is powered off and locked, and the cabinet door of the operating room is locked by the electromagnetic lock, so that an operator cannot open the cabinet door of the operating room, and the disconnecting link mechanism cannot be operated; when the contact net is uncharged, electromagnetic lock circular telegram unblock, the cabinet door can be opened, can manually operation switch mechanism this moment. The method has certain problems, because the locking object is the cabinet door of the operation chamber, if the cabinet door is not closed effectively after being opened or the operator forgets to close the door, the manual operation mechanism of the disconnecting link is easy to be operated by people by mistake, thereby causing safety accidents.

2) Locking the knife switch operation hole: when the contact net is electrified, the motor of the electroscope lock is powered off, the crank hole cannot be opened, and the crank cannot be inserted from the operation hole; when the contact net is not electrified, the motor of the electroscope lock is electrified at the moment, the crank hole is opened, and the crank is inserted into the shaking disconnecting link to be switched on and off. The device is arranged on a cabinet door of a disconnecting link operation chamber, and the cabinet door is locked and managed by using a padlock. The problem that also exists in this method is that the locking function of the device to the knife switch operation hole is invalid once the cabinet door is opened, because the locking of the operation mechanism needs to be established on the basis of the cabinet door locking management.

Therefore, the locking device in the prior art is easy to have misoperation and unreliable problems.

Disclosure of Invention

The invention mainly aims to provide a knife switch locking device to solve the problems that a locking device in the prior art is easy to operate mistakenly and unreliable.

In order to achieve the above object, according to an aspect of the present invention, there is provided a knife switch locking device comprising: the lock seat is arranged on the periphery of a crank operating rod of the disconnecting link control box; the locking assembly is movably arranged in the lock seat and has a locking position and an unlocking position, and when the locking assembly is in the locking position, at least one part of the locking assembly can extend out of the locking hole and limit the crank so as to prevent the crank from being inserted into the crank operating rod; the limiting assembly is arranged inside the lock seat and is provided with a limiting position and an avoiding position, and when the limiting assembly is located at the limiting position, at least one part of the limiting assembly is abutted against the locking assembly so as to enable the locking assembly to be kept at the locking position; the first switch is electrically connected with the limiting component so as to enable the limiting component to be electrically communicated with the circuit; when the contact net is in no power, the first switch is pressed down to enable the limiting assembly to be electrically communicated with the circuit, the limiting assembly is switched to an avoiding position from a limiting position, the limiting assembly releases the limiting on the locking assembly at the moment, and the locking assembly can be switched between an unlocking position and a locking position; if the crank is inserted into the crank operating rod, the crank drives the locking assembly to be switched from the locking position to the unlocking position, so that the crank can conduct opening or closing operation on the knife switch.

Further, the knife switch locking device further comprises a second switch, the second switch is arranged inside the lock seat and electrically connected with the limiting component, and when the locking component is switched from the locking position to the unlocking position, the locking component triggers the second switch, so that the limiting component is switched from the electric conduction state to the disconnection state.

Further, the latch assembly includes: a locking rod, at least one part of which can extend out of the locking hole to limit the crank; the first piece that resets, the one end and the lock seat butt of first piece that resets, the other end and the latching lever butt of first piece that resets for the latching lever provides the reset force who stretches out the latching hole.

Further, the locking rod comprises a cylindrical section and a hemispherical section connected in series, and the hemispherical section protrudes from the locking hole when the locking assembly is switched from the unlocking position to the locking position.

Furthermore, the knife switch locking device also comprises a limiting pin, the limiting pin is arranged in the lock seat, and the locking rod is provided with a limiting groove matched with the limiting pin so as to limit the movement distance of the locking rod.

Further, spacing subassembly includes: a drive structure; the driving structure is in driving connection with the mandrel, when the limiting component is located at the limiting position, one end of the mandrel, which is far away from the driving structure, is abutted against the locking rod of the locking component, when the limiting component is switched from the limiting position to the avoiding position, the driving structure drives the mandrel to move along the direction far away from the locking component, and the locking component can be switched from the locking position to the unlocking position; the second resets, and the second resets the one end and the drive structure butt of piece, and the second resets the other end and the dabber butt of piece for the dabber provides the power that resets towards the motion of locking subassembly.

Further, the direction of movement of the spindle is perpendicular to the direction of movement of the latching lever of the latching assembly.

Furthermore, the lock seat is also provided with a partition plate, a communication hole is formed in the partition plate, the driving structure and the locking assembly are respectively located on two sides of the partition plate, and one end, far away from the driving structure, of the mandrel can penetrate through the communication hole and abut against the locking rod.

Furthermore, the periphery of the mandrel is provided with a baffle, the disconnecting link locking device further comprises an unlocking rotating shaft, and the unlocking rotating shaft can extrude the baffle so that the mandrel moves along the direction far away from the locking rod.

Further, the disconnecting link locking device further comprises a locking cover, the locking cover is arranged on the locking seat, a protruding structure is arranged on one side, away from the locking seat, of the locking cover, the protruding structure is provided with a containing cavity communicated with the locking seat, the unlocking rotating shaft is arranged in the containing cavity, and at least one part of the unlocking rotating shaft can stretch into the locking seat through the containing cavity.

Further, the knife switch locking device further comprises a base and an upper cover, the base is arranged on the knife switch control box, the base and the upper cover are matched to form an accommodating space, the lock seat, the first switch and the PCB are arranged inside the accommodating space, and at least one part of the locking rod of the locking assembly can extend out of the accommodating space.

Furthermore, the disconnecting link locking device also comprises a PCB (printed circuit board), when the contact network is out of power, after the first switch is pressed down, the PCB and the limiting component are in an electric conduction state, and the limiting component can be switched to an avoidance position from a limiting position; when the contact net is electrified, the PCB and the limiting assembly are in a disconnected state, and the limiting assembly is kept at a limiting position.

Furthermore, the knife switch locking device also comprises a PCB, and the second switch and the limiting component are electrically connected with the PCB.

By applying the technical scheme of the invention, the knife switch locking device comprises a lock seat, a locking component, a limiting component and a first switch. The lock seat is arranged on the periphery of a crank operating rod of the disconnecting link control box; the lock seat is provided with a locking hole, the locking component is movably arranged in the lock seat and is provided with a locking position and an unlocking position, and when the locking component is in the locking position, at least one part of the locking component can extend out of the locking hole and limit the crank so as to prevent the crank from being inserted into the crank operating rod; the limiting assembly is arranged in the lock seat and provided with a limiting position and an avoiding position, and when the limiting assembly is located at the limiting position, at least one part of the limiting assembly is abutted against the locking assembly so as to enable the locking assembly to be kept at the locking position; the first switch is electrically connected with the limiting component so as to enable the limiting component to be electrically communicated with the circuit; when the contact network is not powered off, the first switch is pressed down to enable the limiting assembly to be electrically communicated with the circuit, the limiting assembly is switched from the limiting position to the avoiding position, the limiting assembly releases the limiting on the locking assembly at the moment, and the locking assembly can be switched between the unlocking position and the locking position; if the crank is inserted into the crank operating rod, the crank drives the locking assembly to be switched from the locking position to the unlocking position, so that the crank can conduct opening or closing operation on the knife brake.

In conclusion, because the lock seat is arranged on the peripheral side of the crank operating rod of the disconnecting link control box, when the locking assembly is located at the locking position, the disconnecting link locking device can directly lock the crank operating rod instead of locking the cabinet door of the disconnecting link operating chamber, so that when the disconnecting link locking device in the application is used, the crank can be effectively prevented from being inserted into the crank operating rod even if the cabinet door of the disconnecting link operating chamber is not effectively managed, and the problem that misoperation easily occurs in the locking device in the prior art is solved. And, when tool setting switch blocking device operates, only when the contact net is electroless, just can be through the spacing subassembly of first switch control to realize the unblock or the shutting of crank action bars through the interact of spacing subassembly and shutting subassembly, and then can guarantee operating personnel's safety. In addition, the knife switch locking device can be installed on the knife switch control box as an independent module, so that the knife switch locking device has higher universality compared with the existing locking device.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, 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 illustrates a schematic structural diagram of a knife block-out apparatus according to an embodiment of the present invention;

FIG. 2 shows an exploded view of the knife gate lockout device of FIG. 1;

FIG. 3 shows an exploded view of a portion of the knife gate lockout device of FIG. 1;

FIG. 4 shows a schematic structural view of the lockout assembly of the knife block lockout device of the present application in the lockout position;

FIG. 5 shows a schematic view of the lock assembly of the knife gate lock of the present application in an unlocked position;

FIG. 6 is a schematic diagram showing the knife block device of the present application in relation to the knife control box;

fig. 7 shows an enlarged view at a in fig. 6.

Wherein the figures include the following reference numerals:

10. a lock seat; 11. a locking hole; 12. a partition plate; 121. a communicating hole; 20. a disconnecting link control box; 21. a crank lever; 30. a locking assembly; 31. a locking lever; 311. a columnar section; 312. a hemispherical segment; 313. a limiting groove; 32. a first reset member; 40. a crank; 50. a limiting component; 51. a drive structure; 52. a mandrel; 521. a baffle plate; 60. a first switch; 70. a second switch; 80. a spacing pin; 90. unlocking the rotating shaft; 100. a locking cover; 110. a raised structure; 120. an accommodating chamber; 200. a base; 300. an upper cover; 400. and (7) a PCB board.

Detailed Description

It should be noted that, in the present application, the embodiments and features of the embodiments 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 to be 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 invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to inner and outer relative to the profile of the components themselves, but the above directional terms are not intended to limit the invention.

In order to solve the problem that misoperation and unreliable appear easily in the locking device lock among the prior art, this application provides a switch blocking device.

As shown in fig. 1 to 5, the knife switch locking device of the present application includes a lock holder 10, a locking assembly 30, a limiting assembly 50, and a first switch 60. The lock seat 10 is arranged on the periphery of a crank operating rod 21 of a disconnecting link control box 20 (the disconnecting link control box 20 is a gear reduction box); the lock seat 10 is provided with a locking hole 11, the locking component 30 is movably arranged inside the lock seat 10, the locking component 30 is provided with a locking position and an unlocking position, when the locking component 30 is in the locking position, at least one part of the locking component 30 can extend out of the locking hole 11 and limit the crank 40 to prevent the crank 40 from being inserted into the crank operating rod 21; the limiting assembly 50 is arranged inside the lock seat 10, the limiting assembly 50 has a limiting position and an avoiding position, and when the limiting assembly 50 is located at the limiting position, at least one part of the limiting assembly 50 is abutted against the locking assembly 30, so that the locking assembly 30 is kept at the locking position; the first switch 60 is electrically connected with the limiting component 50 so as to enable the limiting component 50 to be conducted with a circuit; when the contact net is in no power, the limiting component 50 can be electrically conducted with a circuit after the first switch 60 is pressed down, the limiting component 50 is switched to an avoiding position from a limiting position, the limiting component 50 releases the limiting on the locking component 30 at the moment, and the locking component 30 can be switched between an unlocking position and a locking position; if the crank 40 is inserted into the crank operating rod 21, the crank 40 drives the locking assembly 30 to switch from the locking position to the unlocking position, so that the crank 40 performs opening or closing operation on the knife brake.

When the knife switch locking device with the structure is used, the lock base 10 is arranged on the periphery side of the crank operating rod 21 of the knife switch control box 20, so when the locking component 30 is positioned at the locking position, the locking component 30 can extend out of the locking hole 11 and limit the crank, the crank 40 can be prevented from being inserted into the crank operating rod 21 to open or close the knife switch control box 20, and the knife switch control box 20 can be effectively locked. In addition, when the knife switch locking device is used, the initial position of the locking assembly 30 is located at the locking position, the limiting assembly 50 is located at the limiting position, so that the locking assembly 30 cannot be switched to the unlocking position from the locking position, the crank 40 cannot be inserted into the crank operating rod 21 to perform opening or closing operation, when a contact system is in no power, the limiting assembly 50 can be electrically conducted with a circuit after the first switch 60 is pressed, the limiting assembly 50 is switched to the avoiding position from the limiting position, and at the moment, in the process of inserting the crank 40 into the crank operating rod 21, the crank 40 can extrude one end, far away from the lock seat 10, of the locking assembly 30 and enable the locking assembly 30 to move to the unlocking position from the locking position. Consequently, the problem that knife switch blocking device is difficult to directly effectively block the knife switch among the prior art has been solved to knife switch blocking device in this application.

In summary, as shown in fig. 1 to 7, since the lock seat 10 is disposed on the periphery of the crank operating rod 21 of the knife switch control box 20, when the locking assembly 30 is in the locking position, the knife switch locking device can directly lock the crank operating rod 21, rather than lock the cabinet door of the knife switch operating room, so that when the knife switch locking device in the present application is used, even if the cabinet door of the knife switch operating room is not effectively managed, the crank 40 can be effectively prevented from being inserted into the crank operating rod 21, thereby solving the problem that the locking device in the prior art is prone to misoperation. And, when operating knife switch blocking device, only when the contact net is electroless, just can be through first switch 60 control spacing subassembly 50 to realize the unblock or the shutting of crank operating lever 21 through spacing subassembly 50 and the interact of shutting subassembly 30, and then can guarantee operating personnel's safety. In addition, since the knife switch locking device in the present application can be mounted on the knife switch control box 20 as an independent module, the knife switch locking device has higher versatility than the conventional locking device.

As shown in fig. 4, when the locking module 30 is in the locking position, the stopper module 50 stops on the moving path of the locking module 30 to limit the locking module 30, so that the locking module 30 is locked at a side close to the crank lever 21, and the crank 40 cannot be inserted into the crank lever 21 to perform an opening or closing operation of the knife switch. At this time, as shown in fig. 5, the limit component 50 is switched from the limit position to the avoidance position and exits from the moving path of the locking component 30, and the crank 40 presses the locking component 30 to switch from the locking position to the unlocking position in the process of inserting the crank operating rod 21, so that the crank 40 can perform opening or closing operation on the knife brake.

It should be noted that, in the present application, the limiting assembly 50 includes a driving structure 51 and a spindle 52. When the contact system is not powered, after an operator presses the first switch 60, the limiting assembly 50 is electrically conducted with the circuit, and then the driving structure 51 can drive the mandrel 52 to move and cut off the limit of the locking assembly 30. When the overhead line system is electrified, even if an operator presses the first switch 60, the first switch 60 cannot work, so that the limiting component 50 cannot be switched from the limiting position to the avoiding position, the locking component 30 cannot be switched from the locking position to the unlocking position, and the crank 40 cannot be inserted into the crank operating rod 21 to perform the switching-off or switching-on operation of the disconnecting link.

It is further noted that in one particular embodiment of the present application, the first switch 60 has a 0.4 second delay effect. That is to say, when the contact net is electroless, operating personnel presses first switch 60 after a period, and first switch 60 can drive spacing subassembly 50 and switch to the position of dodging by the spacing position.

In one embodiment of the present application, the delay time after the first switch 60 is pressed is 0.4 seconds.

As shown in fig. 3, the latch assembly 30 includes a latch lever 31 and a first restoring member 32. At least a portion of the locking rod 31 can protrude from the locking hole 11 to limit the crank 40; one end of the first restoring member 32 abuts against the latch base 10 and the other end of the first restoring member 32 abuts against the latch lever 31 to provide a restoring force for the latch lever 31 to extend out of the latch hole 11. With this arrangement, when the crank 40 is inserted into the crank operating lever 21, the locking lever 31 is pressed by the crank 40 and moves toward the inside of the lock case 10, the locking lever 31 presses the first restoring member 32, and the locking member 30 is switched from the locking position to the unlocking position. After the crank 40 is pulled out of the crank lever 21, the locking lever 31 can be ejected toward the crank lever 21 by the first restoring member 32, and the locking unit 30 is switched from the unlocking position to the locking position.

As shown in fig. 3, the knife switch locking device further includes a second switch 70, the second switch 70 is disposed inside the lock base 10 and is in driving connection with the limiting assembly 50, when the locking assembly 30 is switched from the locking position to the unlocking position, the locking assembly 30 triggers the second switch 70, so that the limiting assembly 50 is switched from the electrical conduction state to the disconnection state. With this arrangement, when the crank 40 is inserted into the crank lever 21 and presses the latch member 30 to switch from the latched position to the unlatched position, the latch lever 31 can trigger the second switch 70, so that the first switch 60 can be released from the action on the position restricting member 50, at this time, after the crank 40 is pulled out of the crank lever 21, the latch lever 31 moves toward the crank lever 21 by the first restoring member 32, the latch member 30 is switched from the unlatched position to the latched position, and the position restricting member 50 can be switched from the retracted position to the position restricting position, so that the latch member 30 can be held at the latched position.

In one particular embodiment of the present application, the second switch 70 is a microswitch.

It should be noted that, in the present application, when the locking assembly 30 is in the unlocking position, the entire locking rod 31 may be located entirely inside the lock housing 10, or partially inside the lock housing 10.

In one embodiment of the present application, the locking rod 31 includes a cylindrical section 311 and a hemispherical section 312 connected in series, and the hemispherical section 312 protrudes from the locking hole 11 when the locking assembly 30 is switched from the unlocking position to the locking position.

In another embodiment of the present application, the locking rod 31 comprises a cylindrical section 311 and a hemispherical section 312 connected in series, wherein when the locking assembly 30 is located at the unlocking position, the cylindrical section 311 is located inside the lock base 10, and the hemispherical section 312 is located outside the lock base 10. When the locking assembly 30 is switched from the unlocking position to the locking position, at least a part of the cylindrical section 311 can extend out of the lock seat 10, so that the hemispherical section 312 can limit the crank, and the crank 40 can be prevented from being inserted into the crank operating rod 21.

Of course, hemispherical segments 312 may be provided in other shapes.

As shown in fig. 3, the knife switch locking device further includes a stopper pin 80, the stopper pin 80 is disposed inside the lock housing 10, and the locking rod 31 has a stopper groove 313 engaged with the stopper pin 80 to limit a moving distance of the locking rod 31. By this arrangement, when the locking assembly 30 is switched between the locking position and the unlocking position, the locking rod 31 can be limited from extending out or entering the movement range of the lock case 10 by the cooperation of the limiting pin 80 and the limiting groove 313.

As shown in fig. 3, the limiting member 50 includes a driving structure 51, a core shaft 52 and a second restoring member. The driving structure 51 is in driving connection with the spindle 52, when the limiting component 50 is located at the limiting position, one end of the spindle 52 away from the driving structure 51 abuts against the locking rod 31 of the locking component 30 and stops on the moving path of the locking rod 31; when the limiting component 50 is switched from the limiting position to the avoiding position, the driving structure 51 drives the spindle 52 to move in the direction away from the locking component 30, the spindle exits the moving path of the locking rod 31, and the locking rod 31 can move in the direction away from the crank operating rod 21, so that the locking component 30 can be switched from the locking position to the unlocking position; one end of the second restoring member abuts against the driving structure 51, and the other end of the second restoring member abuts against the spindle 52 to provide the spindle 52 with a restoring force moving toward the latch assembly 30. By such arrangement, when the catenary is in a power-off state, after an operator presses the first switch 60, the driving structure 51 can drive the mandrel 52, the mandrel 52 moves towards a direction away from the locking rod 31 and gives way to the locking rod 31, so that the limiting component 50 can be switched from the limiting position to the avoiding position, the limiting component 50 releases the limiting on the locking component 30, the crank 40 can press the locking rod 31 and insert into the crank operating rod 21, at the moment, the locking rod 31 can move towards a direction away from the crank operating rod 21, the locking component 30 is switched from the locking position to the unlocking position, and the locking rod 31 of the locking component 30 can trigger the second switch 70, so that the driving structure 51 releases the action on the mandrel 52, and the mandrel 52 moves towards the locking rod 31 of the locking component 30 under the action of the second resetting piece and abuts against the side wall of the locking rod 31. After the crank 40 is pulled out of the crank operating lever 21, the locking rod 31 is extended toward the crank operating lever 21 by the first restoring member 32, the locking assembly 30 is switched from the unlocked position to the locked position, and the spindle 52 can continue to move in a direction away from the driving structure 51 by the second restoring member and limit the locking assembly 30 so that the locking assembly 30 can be maintained in the locked position and the crank 40 cannot be inserted into the crank operating lever 21.

In one embodiment of the present application, the second restoring member is a spring.

In one embodiment of the present application, the direction of movement of the spindle 52 is perpendicular to the direction of movement of the latch rod 31 of the latch assembly 30.

As shown in fig. 3, the lock base 10 further has a partition 12, the partition 12 is provided with a communication hole 121, the driving structure 51 and the locking assembly 30 are respectively located at two sides of the partition 12, and one end of the core shaft 52 far away from the driving structure 51 can pass through the communication hole 121 and abut against the locking rod 31. By providing the partition 12, the mandrel 52 can be effectively supported, and the moving direction of the mandrel 52 can be limited, so that the moving direction of the mandrel 52 can be prevented from being deflected when the limiting assembly 50 is switched between the avoiding position and the limiting position.

In one particular embodiment of the present application, the drive structure 51 is a solenoid. And after the locking assembly 30 is switched from the locking position to the unlocking position and the second switch 70 is triggered, the second switch 70 can de-energize the solenoid, thereby removing the action of the driving structure 51 on the spindle 52, and the spindle 52 can move towards the locking rod 31 under the action of the second reset piece to limit the locking assembly 30 so that the locking assembly 30 is kept at the locking position.

As shown in fig. 3, a baffle 521 is disposed on the periphery of the mandrel 52, the knife switch locking device further includes an unlocking rotating shaft 90, and the unlocking rotating shaft 90 can press the baffle 521 to move the mandrel 52 in a direction away from the locking rod 31. Through the arrangement, when power supply abnormity occurs or the control circuit is in failure, emergency unlocking can be performed by using a mechanical key. In the process of emergency unlocking, the mechanical key can unlock the unlocking rotating shaft 90, and when the mechanical key is rotated, the mechanical key can drive the unlocking rotating shaft 90 to rotate, so that the unlocking rotating shaft 90 can extrude the baffle 521, the core shaft 52 moves in the direction away from the locking rod 31, the limiting component 50 can be switched to the avoiding position from the limiting position, the limitation on the locking component 30 is removed, the crank 40 can be inserted into the crank operating rod 21, the locking component 30 is switched to the unlocking position from the locking position, and then the opening or closing operation of the knife switch can be performed.

As shown in fig. 2 and fig. 3, the knife switch locking device further includes a locking cover 100, the locking cover 100 is covered on the locking base 10, and one side of the locking cover 100 away from the locking base 10 has a protruding structure 110, the protruding structure 110 has a containing cavity 120 communicated with the locking base 10, the unlocking rotating shaft 90 is disposed in the containing cavity 120, and at least a portion of the unlocking rotating shaft 90 can extend into the locking base 10 from the containing cavity 120. The accommodating cavity 120 can provide an accommodating space for the unlocking rotating shaft 90, and can protect the unlocking rotating shaft 90 to a certain extent.

As shown in fig. 2, the knife switch locking device further includes a PCB 400, and the second switch 70 and the limit component 50 are electrically connected to the PCB 400. The normal operation of the knife switch locking device can be effectively ensured by arranging the PCB 400. Also, it should be noted that the first switch 60 may be electrically connected to the PCB 400 as well. When the contact line is not electrified, the PCB board 400 and the limiting component 50 are in an electrically conductive state to drive the limiting component 50 to be switched from the limiting position to the avoiding position; when the contact system is electrified, the PCB 400 and the limiting component 50 are in a disconnected state, and the limiting component 50 is kept at a limiting position.

As shown in fig. 1 and 2, the knife switch locking device further includes a base 200 and an upper cover 300, the base 200 is disposed on the knife switch control box 20, the base 200 and the upper cover 300 cooperate to form an accommodating space, the lock base 10, the first switch 60 and the PCB 400 are disposed inside the accommodating space, and at least a portion of the locking rod 31 of the locking assembly 30 can protrude out of the accommodating space. By this arrangement, the structure between the base 200 and the upper cover 300 can be protected. And a prompt mark is further provided on the outer surface of the upper cover 300 at a position corresponding to the unlocking rotation shaft 90 and the first switch 60.

In addition, the knife switch locking device of the present application is further provided with a holding circuit, and after the driving structure 51 operates, the energizing voltage is reduced to the holding voltage, so that the heating value of the driving structure 51 is reduced, and further, the overheating of the driving structure 51 caused by the long-time unmanned reset after the knife switch locking device is unlocked is prevented.

In addition, the knife switch locking device further comprises an unlocking indicator light, when the limiting component 50 is switched to the avoiding position from the limiting position, the indicator light is turned on, and at the moment, the crank 40 can be inserted into the crank operating rod 21.

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

1. the locking problem of the manual operating mechanism of the disconnecting link is fundamentally solved;

2. the emergency unlocking function is realized, and emergency unlocking can be realized by using a mechanical key;

3. the independent module design, the installation is simple, convenient operation, the commonality is good.

It is to be understood that the above-described embodiments are only a few, and not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, 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 exemplary 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.

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 (13)

1. A knife gate lockout device comprising:

the lock seat (10) is arranged on the periphery of a crank operating rod (21) of the disconnecting link control box (20);

a locking assembly (30), wherein the lock base (10) is provided with a locking hole (11), the locking assembly (30) is movably arranged inside the lock base (10), the locking assembly (30) is provided with a locking position and an unlocking position, when the locking assembly (30) is in the locking position, at least one part of the locking assembly (30) can protrude from the locking hole (11) and limit a crank (40) so as to prevent the crank (40) from being inserted into the crank operating rod (21);

a check assembly (50), wherein the check assembly (50) is arranged inside the lock base (10), the check assembly (50) has a check position and an avoidance position, and when the check assembly (50) is located at the check position, at least a part of the check assembly (50) is abutted against the locking assembly (30) so as to keep the locking assembly (30) at the locking position;

a first switch (60), said first switch (60) being electrically connected to said position limiting assembly (50) to electrically communicate said position limiting assembly (50) with an electrical circuit;

when the contact line is in a non-electric state, the first switch (60) is pressed to enable the limiting assembly (50) to be electrically conducted with the circuit, the limiting assembly (50) is switched from the limiting position to the avoiding position, the limiting assembly (50) releases the limiting on the locking assembly (30), and the locking assembly (30) can be switched between the unlocking position and the locking position; if the crank (40) is inserted into the crank operating rod (21), the crank (40) drives the locking component (30) to be switched from the locking position to the unlocking position, so that the crank (40) can conduct opening or closing operation on the knife switch.

2. The knife latch according to claim 1, characterized in that it further comprises a second switch (70), said second switch (70) being disposed inside said lock seat (10) and being electrically connected to said limit stop assembly (50), said lock assembly (30) triggering said second switch (70) to switch said limit stop assembly (50) from the electrically conductive state to the off state when said lock assembly (30) is switched from said locked position to said unlocked position.

3. Knife-switch blocking device according to claim 1, characterized in that the blocking assembly (30) comprises:

a latch rod (31), at least a portion of the latch rod (31) being extendable from the latch aperture (11) to retain the crank (40);

the first reset piece (32), one end of the first reset piece (32) with lock seat (10) butt, the other end of the first reset piece (32) with latching lever (31) butt to for latching lever (31) provide stretches out the reset force of latching hole (11).

4. Knife-blade blocking device according to claim 3, characterized in that the blocking lever (31) comprises a cylindrical section (311) and a hemispherical section (312) connected in series, the hemispherical section (312) protruding from the blocking hole (11) when the blocking component (30) is switched from the unlocking position to the blocking position.

5. The knife lock device according to claim 3, characterized in that the knife lock device further comprises a limit pin (80), the limit pin (80) is arranged inside the lock base (10), and the locking rod (31) has a limit groove (313) matched with the limit pin (80) to limit the movement distance of the locking rod (31).

6. Knife-blade blocking device according to any one of claims 1 to 5, characterized in that the limiting assembly (50) comprises:

a drive structure (51);

a mandrel (52), wherein the driving structure (51) is in driving connection with the mandrel (52), when the limiting component (50) is located at the limiting position, one end of the mandrel (52) far away from the driving structure (51) is abutted to the latching rod (31) of the latching component (30), when the limiting component (50) is switched from the limiting position to the avoiding position, the driving structure (51) drives the mandrel (52) to move in a direction far away from the latching component (30), and the latching component (30) can be switched from the latching position to the unlocking position;

and one end of the second resetting piece is abutted with the driving structure (51), and the other end of the second resetting piece is abutted with the mandrel (52) so as to provide resetting force for the mandrel (52) to move towards the locking assembly (30).

7. The knife gate lockout device of claim 6, wherein a direction of movement of the spindle (52) is perpendicular to a direction of movement of a lockout lever (31) of the lockout assembly (30).

8. The knife gate blocking device according to claim 6, characterized in that the lock base (10) further has a partition plate (12), a communication hole (121) is provided on the partition plate (12), the driving structure (51) and the blocking assembly (30) are respectively located on both sides of the partition plate (12), and one end of the core shaft (52) far away from the driving structure (51) can pass through the communication hole (121) and abut against the blocking rod (31).

9. The knife gate blocking device according to claim 6, characterized in that a baffle plate (521) is arranged on the periphery of the mandrel (52), the knife gate blocking device further comprises an unlocking rotating shaft (90), and the unlocking rotating shaft (90) can press the baffle plate (521) to move the mandrel (52) in a direction away from the blocking rod (31).

10. The knife-switch locking device according to claim 9, characterized in that the knife-switch locking device further comprises a locking cover (100), the locking cover (100) is covered on the locking seat (10), and a side of the locking cover (100) far away from the locking seat (10) is provided with a protruding structure (110), the protruding structure (110) is provided with an accommodating cavity (120) communicated with the locking seat (10), the unlocking rotating shaft (90) is arranged in the accommodating cavity (120), and at least a part of the unlocking rotating shaft (90) can extend into the locking seat (10) from the accommodating cavity (120).

11. The knife-switch blocking device according to any one of claims 1 to 5, characterized in that the knife-switch blocking device further comprises a base (200) and an upper cover (300), the base (200) is arranged on the knife-switch control box (20), the base (200) and the upper cover (300) are matched to form a containing space, the lock base (10), the first switch (60) and the PCB (400) are all arranged in the containing space, and at least one part of the blocking rod (31) of the blocking assembly (30) can extend out of the containing space.

12. The knife block out device of any of claims 1 to 5, further comprising a PCB board (400),

when the contact net is in no power, after the first switch (60) is pressed down, the PCB (400) and the limiting component (50) are in an electric conduction state, and the limiting component (50) can be switched to the avoiding position from the limiting position;

when the contact net is electrified, the PCB (400) and the limiting component (50) are in a disconnected state, and the limiting component (50) is kept at the limiting position.

13. The knife block out device of claim 2, further comprising a PCB board (400), wherein the second switch (70) and the position limiting assembly (50) are electrically connected to the PCB board (400).

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