CN216929393U - High-voltage switch cabinet and interlocking device for same - Google Patents

Abstract

The application provides a high tension switchgear and be used for high tension switchgear's interlock. The interlocking device comprises a first interlocking component, a first program interlocking component, a first elastic interlocking component and a second program interlocking component; the second program lock assembly shares the unlocking key with the first program lock assembly. The first program lock component is used for unlocking or locking the first lock component; the first elastic locking piece is used for unlocking or locking the first program lock component; and under the condition that the circuit breaker handcart reaches the corresponding test position, the first program lock assembly enters a locking state and locks the first lock assembly so as to lock the circuit breaker handcart at the corresponding test position, so that the isolation handcart can be moved only under the condition that the circuit breaker handcart is kept at the corresponding test position. The interlock that this application provided can prevent charged separation isolator effectively.

Description

High-voltage switch cabinet and interlocking device for same

Technical Field

The application relates to the technical field of high-voltage switch equipment, in particular to a high-voltage switch cabinet and an interlocking device for the high-voltage switch cabinet.

Background

The high-voltage switch equipment is an important component of the mechanical industry, is important power transmission and distribution equipment of the power industry, is closely related to national economy and social development, and has been rapidly developed since the innovation is opened so as to make the high-voltage switch equipment in China. The complex diversity of high-voltage switchgear has been a challenge to the safe operation and maintenance of the switch.

Over the years, statistics of a large number of electrical accidents show that human body electric shock casualties and electrical equipment accidents are often in direct relation with the technical business level of electrical workers. Therefore, the operation is strictly carried out according to the 'five prevention' rule of electrical safety, and the occurrence of misoperation accidents can be effectively reduced and avoided. Wherein, the five preventions of high tension switchgear do: 1. the isolating switch is prevented from being switched on and off under load; 2. a circuit breaker is prevented from being switched on and off; 3. a load-on switching-on prevention grounding switch; 4. when the anti-grounding switch is closed, the load is sent; 5. prevent mistake and go into electrified interval. In order to avoid misoperation accidents, a reliable interlocking and locking device is arranged on the switch equipment, so that the correctness of an operation program can be ensured, and the five misoperation can be prevented.

The GB/T3906-20206.13 interlocking device has the following requirements on interlocking: metal-enclosed switchgear and control equipment equipped with disconnectors should be provided with interlocks to prevent operation of the disconnector outside the specified conditions. The disconnector can only be operated with the associated circuit breaker, load switch or contactor in the open position. Namely, the switch equipment is required to prevent the on-load on-off disconnecting switch. However, no scheme for reliably realizing the function of preventing the on-load on-off disconnecting switch under the condition of interlocking handcart with the door closed exists in the industry at present.

Therefore, how to provide a new interlocking scheme to reliably realize the function of preventing the on-load on-off disconnecting switch is a technical problem which is always solved by the technical personnel in the field.

The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may contain information that does not constitute prior art that is already known to a person of ordinary skill in the art.

SUMMERY OF THE UTILITY MODEL

It is an object of the present application to provide an interlock for a high voltage switchgear capable of preventing an operation of a disconnector with load.

It is another object of the present application to provide a high voltage switchgear cabinet having a disconnector which is resistant to load operation.

In order to solve the technical problem, the following technical scheme is adopted in the application:

according to an aspect of the application, this application provides an interlock for high tension switchgear, and high tension switchgear includes circuit breaker cabinet and isolation cabinet, and circuit breaker cabinet internally mounted has the circuit breaker handcart, and isolation cabinet internally mounted has the isolation handcart, and interlock includes: the first linkage assembly is arranged on the circuit breaker handcart and used for moving the circuit breaker handcart so as to enable the circuit breaker handcart to reach a test position or a working position corresponding to the circuit breaker handcart; the first program lock assembly is fixed on the circuit breaker handcart; the first program lock assembly is provided with an unlocking key, and the first program lock assembly is in an unlocking state or a locking state by rotating the unlocking key so as to unlock or lock the first program lock assembly; the unlocking key can be pulled out only when the first program lock component is in a locking state; the first elastic locking piece is fixed on the circuit breaker handcart and used for unlocking or locking the first program lock component; under the condition that the circuit breaker handcart reaches the corresponding test position, the circuit breaker handcart compresses the first elastic locking piece to enable the first elastic locking piece to be ejected out and unlock the first program lock component, so that the first program lock component can enter a locking state by rotating an unlocking key; under the condition that the first program lock assembly is in a locking state, the first lock assembly can be locked so as to lock the circuit breaker handcart at a corresponding test position and enable the unlocking key to be pulled out; the second program lock assembly is arranged on the isolation handcart; the second program lock assembly shares the unlocking key with the first program lock assembly to enable the isolation handcart to be moved by the unlocking key only if the circuit breaker handcart is held in the corresponding test position to prevent the isolation switch on the charged isolation handcart.

In some embodiments, the circuit breaker handcart is provided with a corresponding static frame and a movable frame, and the first linkage assembly is used for enabling the corresponding movable frame to advance or retreat relative to the corresponding static frame so as to enable the circuit breaker handcart to reach a corresponding test position or working position; the static frame is provided with a front end frame strip; the first lock assembly and the first program lock assembly are arranged on the front end frame strip;

the first program lock component comprises a first limiting piece, and the first limiting piece is provided with an extension position corresponding to the first program lock component in a locking state and a contraction position corresponding to the first program lock component in an unlocking state; the first lock component is provided with a mobile operation socket, and the mobile operation socket is used for inserting the movable unlocking piece so as to unlock the first lock component; the first limiting piece extends towards the direction of the first lock assembly; under the condition that the first program lock assembly is in a locked state, the first limiting piece extends and blocks the moving operation socket so as to lock the first lock assembly.

In some embodiments, a first slot is formed on the first limiting member, the direction of the slot opening faces the first program lock assembly, and a clamping position is formed at the bottom of the first slot; the front end frame strip is provided with a first through hole; the first elastic locking piece comprises a first straight rod and a first elastic piece; the first straight rod is movably arranged in the first through hole in a penetrating way; the first straight rod is sleeved with the first elastic piece, one end of the first elastic piece is fixed on the rear side wall of the front end frame strip, and the other end of the first elastic piece is fixed on the first straight rod; a clamping and locking part is arranged at one end of the first straight rod, which is far away from the first elastic part; under the condition that the first limiting piece is at the extending position, the position of the clamping lock part corresponds to the position of the clamping position; when the circuit breaker handcart enters the corresponding test position, the movable frame pushes the first straight rod, so that the clamping lock part is pushed out from the clamping position, and the first program lock component is unlocked.

In some embodiments, the first program lock assembly can be brought into a locked state and locked by rotating the unlocking key with the circuit breaker trolley located at the corresponding test position.

In some embodiments, when the first program lock assembly is in the unlocked state and the circuit breaker leaves the corresponding test position, the first elastic member rebounds to drive the first latching portion to retract into the first latching groove, so as to lock the first program lock assembly by blocking the first limiting member from extending.

In some embodiments, the first lock assembly includes a drive screw, a nut, and a pressure-bearing moving plate; through holes with mutually corresponding positions are distributed on the front end frame strip and the movable frame, and a transmission screw rod is penetrated through the through holes; the inner wall of the through hole corresponding to the movable frame is provided with threads matched with the outer wall of the transmission screw rod so as to convert the rotary motion of the transmission screw rod into the linear motion of the movable frame; the nut is sleeved on the transmission screw rod and is fixed on the frame strip at the front end; the nut is provided with a first pipe section and a second pipe section, the outer contour of the first pipe section is circular, the outer contour of the second pipe section is polygonal, and the distance between any point on the outer contour of the second pipe section and the center of the nut is larger than or equal to the radius of the first pipe section; the first pipe section is positioned on one side of the screw cap close to the frame strip at the front end; the pressure-bearing moving plate is fixed on the frame strip at the front end and movably sleeved on the second pipe section; a moving operation socket is formed on the outer side of the pressure-bearing moving plate; the unlocking piece is inserted into the movable operation socket, the pressure bearing movable plate is pressed downwards and movably sleeved on the first pipe section, and the first lock assembly is unlocked.

In some embodiments, the first lock assembly further comprises a locating plate; at least one of the transmission screw rod, the screw cap and the pressure-bearing moving plate is fixed on the front-end frame strip through the positioning plate; under the condition that the circuit breaker handcart is located at the corresponding test position, the first extension piece extends to between the pressure-bearing moving plate and the positioning plate to block the pressure-bearing moving plate from pressing down, so that the first linkage assembly is locked.

In some embodiments, the isolation handcart further comprises a second interlocking assembly and a second elastic locking piece, wherein the second interlocking assembly is used for enabling the isolation handcart to reach a corresponding test position or working position; and the second elastic locking piece unlocks the second program lock component under the condition that the isolation handcart is located at the corresponding working position, so that the second program lock component can enter a locking state, and the unlocking key can be pulled out.

In some embodiments, the second resilient latch comprises a second straight rod and a second resilient member; the second elastic piece is sleeved on the second straight rod, one end of the second elastic piece is fixed on the static frame corresponding to the isolation handcart, and the other end of the second elastic piece is fixed on the second straight rod; the second straight rod movably penetrates through the corresponding static frame and the corresponding movable frame of the isolation handcart, an avoiding part is arranged at one end of the second straight rod, which is positioned at the corresponding static frame, and a limiting baffle is arranged at the other end of the second straight rod; the second program lock component is provided with an extendable second limiting piece, and a second clamping groove facing the second interlocking component is formed in the second limiting piece; under the condition that the isolation handcart enters the corresponding working position, the corresponding movable frame pulls the second straight rod through the limiting baffle, and the avoiding part is located in the second clamping groove.

In some embodiments, the second limiting member is extended by rotating the unlocking key with the isolated wheelbarrow in the corresponding working position, so that the second interlocking component can be extended and locked, and the unlocking key can be pulled out.

In some embodiments, when the isolated wheelbarrow leaves the corresponding working position, the second elastic member rebounds to drive the avoiding portion to leave the second clamping groove, and the second straight rod is clamped into the clamping groove to block the second limiting member from extending, and the unlocking key is stopped in the second program lock assembly.

According to another aspect of the application, a high-voltage switch cabinet is also provided, which has an interlock device for a high-voltage switch cabinet as described above.

According to the technical scheme, the beneficial effects of the application are as follows:

in this application, because second program lock subassembly and first program lock subassembly sharing key of unblanking, and only under the circuit breaker handcart is kept in the experimental position's that corresponds the condition, the key of unblanking just can be extracted, and then just can make second program lock subassembly unblock through the key of unblanking, and then just can make the isolated wheelbarrow leave the operating position who corresponds, thereby guarantee only can make the isolated wheelbarrow operated under the condition that the circuit breaker handcart is in experimental position, realized preventing the isolator on the charged isolated wheelbarrow.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The above and other objects, features and advantages of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

Fig. 1 is a schematic structural diagram of an interlocking device for a high-voltage switch cabinet according to an embodiment of the application.

Fig. 2 is a schematic structural view of a first program lock assembly according to an embodiment of the present application.

Fig. 2a is a schematic view of the first program lock assembly in an unlocked state.

Fig. 2b is a schematic view of the first program lock assembly in the locked state.

Fig. 3 is a schematic structural diagram of a circuit breaker trolley in a test position and a first program lock assembly in a locked state according to an embodiment of the present application.

Fig. 4 is a schematic view of the circuit breaker trolley of fig. 3 in a test position with the first program lock assembly in an unlocked state.

Fig. 5 is a cross-sectional view of a circuit breaker trolley in a test position and a first program lock assembly in a latched state according to an embodiment of the present application.

Fig. 6 is a schematic structural diagram of an isolation handcart in a corresponding working position according to an embodiment of the application.

Fig. 7 is a schematic structural diagram of an isolation handcart not in a corresponding working position according to an embodiment of the application.

FIG. 8 is a schematic view of a second resilient latch according to an embodiment of the present application.

Fig. 9 is a flowchart illustrating an operation of the disconnection busbar cabinet of the high voltage switch cabinet according to an embodiment of the present application.

Fig. 10 is a flowchart illustrating an operation of a closing bus coupler cabinet of a high voltage switchgear according to an embodiment of the present application.

The reference numerals are explained below:

10. a circuit breaker handcart; 20. an isolation handcart;

11. a first resilient latch member; 12. a first program lock assembly; 13. a first linkage assembly;

21. a second resilient latch; 22. a second program lock assembly; 23. a second interlock assembly;

101. front end frame strips; 102. a movable frame; 111. a first straight rod; 112. a first elastic member; 113. a latch portion; 120. a lock hole; 121. a telescoping member; 121a, a first card slot; 121b, clamping; 122. a first limit piece; 131. a mobile operation socket; 212. a second straight bar; 213. a second elastic member; 214. an avoidance part; 215. and a limiting baffle.

Detailed Description

While this application is susceptible of embodiment in different forms, there is shown in the drawings and will herein be described in detail only some specific embodiments, with the understanding that the present disclosure is to be considered as an exemplification of the principles of the application and is not intended to limit the application to that as illustrated herein.

Thus, a feature indicated in this specification is intended to describe one of the features of an embodiment of the application and does not imply that every embodiment of the application must have the described feature. Further, it should be noted that this specification describes many features. Although some features may be combined to show a possible system design, these features may also be used in other combinations not explicitly described. Thus, the combinations illustrated are not intended to be limiting unless otherwise specified.

In the embodiments shown in the drawings, directional references (such as up, down, left, right, front, and rear) are used to explain the structure and movement of the various elements of the present application not absolutely, but relatively. These illustrations are appropriate when the elements are in the positions shown in the figures. If the description of the positions of these elements changes, the indication of these directions changes accordingly.

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present application and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted.

The preferred embodiments of the present application will be further described in detail below with reference to the accompanying drawings of the present specification.

To facilitate understanding of the solution provided in the present application, a high voltage switchgear and its structure will be first described.

High-voltage switch cabinets are widely applied to power distribution systems for receiving and distributing electric energy. Not only can a part of power equipment be put into or quit operation according to operation requirements, but also the fault part can be quickly cut off from the system when the power equipment is in fault, thereby ensuring the normal operation of the fault-free part in the power grid and the safety of the equipment and operation maintenance personnel. Therefore, the high-voltage switch cabinet is very important distribution equipment, and the safe and reliable operation of the high-voltage switch cabinet has very important significance to the system.

The high-voltage switchgear cabinets are separated by partitions, usually forming at least a circuit breaker cabinet and a disconnector cabinet. Wherein, the isolation cabinet is arranged in realizing safe isolation breaking point in distribution lines to guarantee high-voltage apparatus and device and overhaul the safety of during operation, play isolated voltage's effect. The box material is generally steel plate, stainless steel, etc.

A special guide rail is usually mounted in the cabinet for the hand truck to slide and work inside, so that the hand truck can move between its working position and the testing position. The fixed contact is usually mounted on the rear wall of the handcart chamber, when the handcart is pulled out of the cabinet, the movable contact is separated from the fixed contact, a device on the handcart is disconnected with a high-voltage line, otherwise, the handcart moves in the opposite direction to the handcart to be completely compounded, so that the fixed contact is in contact with the movable contact, and a passage is realized, in other words, the handcart reaches a working position. In order to ensure that the operator does not touch the charged body when operating the hand truck, a positioning device is usually provided on the rail from which the hand truck is pulled out to ensure that the hand truck is disconnected when it stays in this position, which is usually referred to as a test position.

When the circuit breaker cabinet and the isolation chamber are far away from the ground, the movable overhauling trolley can be used for assisting in pulling out and pushing in a circuit breaker handcart and an isolation handcart. Specifically, before the maintenance trolley is pushed to the breaker cabinet or the isolation cabinet which needs to be pulled out, the maintenance trolley positioning rod is aligned to the positioning hole in the switch cabinet, the maintenance trolley is pushed to be close to the cabinet body, the maintenance trolley is locked and hooked on the cabinet body, the adjusting nut under the tray of the maintenance trolley is adjusted, the track of the maintenance trolley is connected with the cabinet track, and therefore the handcart can be pulled out to the maintenance trolley. In another embodiment, the handcart can also be provided with a chassis vehicle, the chassis vehicle has certain structural rigidity, a static frame and a movable frame are arranged on the chassis vehicle, a breaker body is fixed on the movable frame, and the breaker can move between the working position and the testing position by moving the movable frame.

The interlocking device in this application can realize just can operating isolator when the circuit breaker is in the separating brake position to guarantee operating personnel safety, prevent to prescribe and operate isolator outward.

Fig. 1 is a schematic structural diagram of an interlocking device for a high-voltage switch cabinet according to an embodiment of the application. As shown in fig. 1, the high-voltage switch cabinet includes a breaker cabinet and an isolation cabinet. Breaker cabinet internally mounted has circuit breaker handcart 10, and isolator cabinet internally mounted has isolation handcart 20, and interlock includes: a first locking assembly 13, a first program locking assembly 12, a first elastic locking assembly 11 and a second program locking assembly 22.

The first linkage assembly 13 is mounted on the circuit breaker handcart and used for moving the circuit breaker handcart 10 so that the circuit breaker handcart 10 can reach a corresponding test position or working position of the circuit breaker handcart. Specifically, the first lock assembly 13 may include a movable handcart moving remote rod and a moving operation socket provided on the pipeline handcart, and is used for moving operation of the circuit breaker between the working position and the experimental position.

A first programming lock assembly 12 is secured to the circuit breaker trolley 10 for controlling a first programming lock assembly 13. Specifically, the method comprises the following steps. The first program lock assembly 12 has an unlock key which is turned to place the first program lock assembly in an unlocked state or a locked state to unlock or lock the first program lock assembly.

A first resilient latch 11 is secured to the circuit breaker trolley 10 for unlocking or locking the first program lock assembly 12. The first elastic latch 11 may be an elastic catch disposed in the first program lock assembly 12, or may be a stopper disposed outside the first program lock assembly 12 for limiting unlocking of the first program lock assembly, and the first elastic latch 11 may unlock the first program lock assembly 12 after the circuit breaker reaches the set position.

In this embodiment, when the circuit breaker handcart 10 reaches the corresponding test position, the circuit breaker handcart 10 compresses the first elastic locking member 11, so that the first elastic locking member 11 is ejected and unlocks the first program lock assembly 12, and then the first program lock assembly 12 enters a locking state by rotating the unlocking key, and further the first locking assembly 13 can be locked, so that the circuit breaker handcart is locked at the corresponding test position. Only when the first program lock assembly is in the locked state, the unlocking key can be withdrawn and used to unlock the second program lock assembly 22 mounted on the isolation cart 20.

Therefore, the second program lock assembly 22 is used for assisting in controlling the isolation handcart to move between the working position and the test position corresponding to the isolation handcart 20, the second program lock assembly 22 and the first program lock assembly 12 share the unlocking key, and the unlocking key can be pulled out only under the condition that the circuit breaker handcart 10 is kept at the corresponding test position, so that the second program lock assembly can be unlocked through the unlocking key, and the isolation handcart can be separated from the corresponding working position, therefore, the isolation handcart 20 can be operated under the condition that the circuit breaker handcart 10 is at the working position, the isolation handcart 10 is prevented from operating in the moving process and at the corresponding working position, and the effect of preventing the isolation switch on the charged isolation handcart 20 is achieved.

Fig. 2 is a schematic structural view of a first program lock assembly according to an embodiment of the present application. As previously mentioned, the first program lock assembly has an unlock key that is turned to place the first program lock assembly in either an unlocked state or a locked state.

Specifically, as shown in fig. 2, fig. 2 includes fig. 2a and fig. 2b, where fig. 2a is a schematic structural view of the first program lock assembly in the unlocked state. Fig. 2b is a schematic view of the first program lock assembly in the locked state. As shown in fig. 2a and 2b, the first program lock assembly 12 includes a telescopic member 121 and a lock hole 120, the telescopic member 121 is in an extended position when the first program lock assembly is in a locked state, and is in a retracted position when the first program lock assembly is in an unlocked state. The locking hole 120 is used for insertion of an unlocking key (not shown). The telescopic member 121 is used for connecting a first limiting member (not shown in the drawings) to unlock or lock the first locking assembly 13 through the first limiting member. In the unlocked state shown in fig. 2a, the unlocking key cannot be removed, and in the locked state shown in fig. 2b, the unlocking key can be removed.

Under the prerequisite that extensible member 121 is unrestricted, can make first procedure lock subassembly 12 get into the shutting state through rotating the key of unblanking, and then the first lock subassembly 13 of lockable to lock in the experimental position that corresponds with circuit breaker handcart 10, and make the key of unblanking can be extracted.

In one embodiment, the circuit breaker trolley may have corresponding stationary and moving frames that are connected by specific moving and stationary rails that may be used for guidance and positioning. The first linkage assembly 13 is used for enabling the corresponding movable frame to advance or retreat relative to the corresponding static frame, so that the circuit breaker handcart reaches the corresponding test position or working position. In this embodiment, the stationary frame has a front frame strip, and the first locking assembly 13 and the first program locking assembly 12 are disposed on the front frame strip. Therefore, an operator can operate the circuit breaker handcart on the premise of not contacting the circuit breaker, and separation from the charged body is realized.

Fig. 3 is a schematic structural diagram of a circuit breaker trolley in a test position and a first program lock assembly in a locked state according to an embodiment of the present application. Fig. 4 is a schematic view of the circuit breaker trolley of fig. 3 in a test position with the first programming lock assembly in an unlocked state. Fig. 5 is a cross-sectional view of a circuit breaker trolley in a test position and a first program lock assembly in a latched state according to an embodiment of the present application.

As shown in fig. 3 and 4, the first limiting member 122 is provided with a first engaging groove 121a, the direction of the opening of the first limiting member faces the direction of the first program lock assembly 13, and a locking portion 121b is disposed at the bottom of the first engaging groove 121 a.

As shown in fig. 5, the first lock assembly 13 is provided with a moving operation socket 131 for inserting a movable unlocking member therein to press and unlock the first lock assembly 13, so that the corresponding movable frame can advance or retreat with respect to the corresponding stationary frame. The first limiting member 122 extends in the direction of the first lock assembly 13. With the first program lock assembly 12 in the locked state, the first limiting member 122 extends and blocks the moving operation socket from being pressed downwards to lock the first program lock assembly.

From this, can guarantee to make isolated wheelbarrow 20 operated under the condition that circuit breaker handcart 10 is in operating position, realize preventing the effect of the isolator on the isolated wheelbarrow 20 of charge separation, and the first locating part of accessible and portable unlocking piece can realize the dual control to first lock subassembly to in case operate the circuit breaker handcart outside the regulation, guarantee the security of operating personnel and equipment.

In one embodiment, the first position-limiting member has a vertical plate and a horizontal plate fixedly connected to each other; the vertical plate is used for being fixedly connected with the telescopic piece, the horizontal plate faces to the first lock assembly and is provided with an open slot, namely a first clamping slot, the clamping slot is provided with an upper clamping wall and a lower clamping wall, the upper clamping wall and the lower clamping wall respectively form an upper clamping part and a lower clamping part with the upper edge and the lower edge of the horizontal plate, and the upper clamping part and the lower clamping part are clamped into the advancing direction of the moving operation socket 131 to limit the movement of the circuit breaker handcart. The thickness of the first limiting member gradually becomes thinner from the end connected with the telescopic member 121, so that the structural rigidity of the connecting position of the vertical plate and the horizontal plate can be increased, and the upper and lower clamping portions of the horizontal plate can be conveniently clamped into the advancing direction of the moving operation socket 131.

As shown in fig. 5, a first through hole is formed on the front end frame strip 101 of the stationary frame. The first elastic locking member includes a first straight rod 111, a first elastic member 112, and a locking portion 113 disposed at an end of the first straight rod 111 away from the first elastic member 112. The first straight rod 111 is movably disposed through the first through hole, and the first elastic member 112 is disposed on the first straight rod. One end of the first elastic member 112 is fixed to the rear sidewall of the front frame strip 101, and the other end is fixed to the first straight bar 111. The first elastic member 112 may be a spring. The latch is disposed at the front side of the front frame strip 101. Referring to fig. 3 and 4, in a case where the first limiting member 122 is at the extended position, the position of the latching portion 113 corresponds to the position of the latching portion 121 b. When the circuit breaker handcart enters the corresponding test position, the movable frame 102 pushes the first straight rod 111, so that the locking part is pushed out from the locking groove 121a, the constraint on the forward movement of the first limiting part 122 is removed, and the first limiting part 122 is extended when the unlocking key is rotated. At this time, the unlocking key is turned to cause the first program lock assembly to lock the first lock assembly and to enable the unlocking key to be extracted, in other words, the state of fig. 4 is brought into the state of fig. 3.

From this, can make under the condition that the circuit breaker handcart got into the experimental position that corresponds, can unblock first procedure lock subassembly, make it get into the shutting state through the key operation of unblanking, and can make the circuit breaker handcart be located under the condition of the experimental position that corresponds, make first procedure lock subassembly get into the shutting state through rotating the key of unblanking to first lock subassembly of lockable keeps the position of circuit breaker handcart in the experimental position that corresponds.

In one embodiment, under the condition that the first program lock assembly is in the unlocked state and the circuit breaker leaves the corresponding test position, the first elastic piece rebounds to drive the first locking part to retract into the clamping groove, so that the first program lock assembly is locked by blocking the first limiting part from extending, and therefore an operator is prevented from operating the isolation handcart when the circuit breaker handcart is in a shaking-in and shaking-out state or in a working position.

In some embodiments, the first lock assembly includes a drive screw, a nut, and a pressure-bearing moving plate; through holes corresponding to each other in position are distributed on the front end frame strip and the movable frame so as to allow the transmission screw rod to penetrate through; the inner wall of the through hole corresponding to the movable frame is provided with threads matched with the outer wall of the transmission screw rod so as to convert the rotary motion of the transmission screw rod into the linear motion of the movable frame; the nut is sleeved on the transmission screw rod and is fixed on the frame strip at the front end; the nut is provided with a first pipe section and a second pipe section, the outer contour of the first pipe section is circular, the outer contour of the second pipe section is polygonal, and the distance between any point on the outer contour of the second pipe section and the center of the nut is larger than or equal to the radius of the first pipe section; the first pipe section is positioned on one side of the screw cap close to the frame strip at the front end; the pressure-bearing moving plate is fixed on the frame strip at the front end and movably sleeved on the second pipe section; a moving operation socket is formed on the outer side of the pressure-bearing moving plate; under the condition that the unlocking piece is inserted into the movable operation socket, and the pressure-bearing movable plate is pressed downwards and movably sleeved on the first pipe section, the first lock assembly is unlocked.

In some embodiments, the first lock assembly further comprises a locating plate; at least one of the transmission screw rod, the screw cap and the pressure-bearing moving plate is fixed on the front-end frame strip through a positioning plate; under the condition that the circuit breaker handcart is located at the corresponding test position, the first extension piece extends to between the pressure-bearing moving plate and the positioning plate to block the pressure-bearing moving plate from pressing down, so that the first linkage assembly is locked. From this, the accessible locating plate increases the structural rigidity, makes the installation of first lock subassembly more stable, and easily shakes in and shakes out.

Fig. 6 is a schematic structural diagram of an isolation handcart in a corresponding working position according to an embodiment of the application. Fig. 7 is a schematic structural diagram of an isolation handcart not in a corresponding working position according to an embodiment of the application.

As shown in fig. 6 and 7, the isolation handcart further comprises a second interlocking assembly 23 and a second elastic locking member 21, wherein the second interlocking assembly 23 is used for enabling the isolation handcart to reach a corresponding test position or working position. The second interlocking component 23 may take the same configuration as the first interlocking component.

The second resilient latch 21 unlocks the second program lock assembly 22 with the isolated hand truck in the corresponding operating position to enable the second program lock assembly 22 to enter the latched state and the unlock key to be pulled out.

FIG. 8 is a schematic structural view of a second resilient latch according to an embodiment of the present application. As shown in fig. 8, the second elastic latch 21 includes a second straight rod 212 and a second elastic member 213. The second elastic piece is sleeved on the second straight rod, one end of the second elastic piece is fixed on the static frame corresponding to the isolation handcart, and the other end of the second elastic piece is fixed on the second straight rod. The second straight rod movably penetrates through the corresponding static frame and the corresponding movable frame of the isolation handcart, an avoiding portion 214 is arranged at one end, located at the corresponding static frame, of the second straight rod, and a limiting baffle 215 is arranged at the other end of the second straight rod.

Similar to the first program lock assembly, the second program lock assembly 22 has an extendable second limiting member, and a second slot is formed on the second limiting member and faces the second interlocking assembly. Under the condition that the isolated handcart enters the corresponding working position, the corresponding movable frame pulls the second straight rod 212 through the limiting baffle 215, and the avoiding part 214 is positioned in the second clamping groove, so that an extending space is reserved for the second limiting part.

As shown in fig. 6, when the isolated wheelbarrow is located at the corresponding operating position and the avoiding portion 214 is located in the second card slot, the unlocking key is rotated to extend the second limiting member, so that the second interlocking component can be extended and locked, and the unlocking key can be pulled out. Therefore, the circuit breaker handcart can be operated under the condition that the isolation handcart is located at the corresponding working position, so that the operation rules conform to the operation regulations of the high-voltage switch cabinet.

As shown in fig. 7, when the isolated wheelbarrow leaves the corresponding working position, the second elastic member rebounds to drive the avoiding portion to be away from the second slot, and the second straight rod is clamped into the slot to block the second limiting member from extending, and the unlocking key is stopped in the second program lock assembly. Therefore, the unlocking key cannot be pulled out under the condition that the isolation handcart is not at the corresponding working position, so that the circuit breaker handcart cannot be operated at other non-working positions. Therefore, the isolation handcart can be ensured to be positioned at the corresponding working position when the breaker handcart is operated.

Fig. 9 is a flowchart illustrating an operation of the disconnection busbar cabinet of the high voltage switch cabinet according to an embodiment of the application. As shown in fig. 9, in this embodiment, the operation method of disconnecting the bus coupler cabinet specifically includes the following steps.

Step 901, pulling the circuit breaker handcart to a test position corresponding to the circuit breaker handcart, and locking a first program lock assembly to enable the circuit breaker handcart to be incapable of moving;

step S902, pulling out an unlocking key;

and step S903, inserting the unlocking key into a second program lock assembly on the isolated handcart, and enabling the isolated handcart to enter a corresponding test position through a second interlocking assembly.

Fig. 10 is a flowchart illustrating an operation of a closing bus coupler cabinet of a high voltage switchgear according to an embodiment of the present application. As shown in fig. 10, in this embodiment, the operation method of the closing bus coupler cabinet mainly includes the following steps.

Step S904, the isolation handcart is pulled to a corresponding working position, and the second program lock assembly is locked to enable the isolation handcart not to move;

step S905, pulling out an unlocking key;

and S906, inserting the unlocking key into a first program lock assembly on the circuit breaker handcart, and enabling the circuit breaker handcart to enter a corresponding working position through the first program lock assembly.

Therefore, the isolation handcart can be guaranteed to be incapable of being operated when the circuit breaker handcart is moved and is located at a working position, the isolation handcart is guaranteed to be pushed back to the working position and then can be returned to the working position, and the effect of preventing the charged isolation switch is achieved.

While the present application has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present application may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims (10)

1. The utility model provides an interlock for high tension switchgear, a serial communication port, high tension switchgear includes circuit breaker cabinet and isolation cabinet, circuit breaker cabinet internally mounted has the circuit breaker handcart, isolation cabinet internally mounted has the isolation handcart, interlock includes:

the first linkage assembly is arranged on the circuit breaker handcart and used for moving the circuit breaker handcart so as to enable the circuit breaker handcart to reach a test position or a working position corresponding to the circuit breaker handcart;

the first program lock assembly is fixed on the circuit breaker handcart; the first program lock assembly is provided with an unlocking key, and the first program lock assembly is in an unlocking state or a locking state by rotating the unlocking key so as to unlock or lock the first program lock assembly; the unlocking key can be pulled out only when the first program lock component is in the locking state;

the first elastic locking piece is fixed on the circuit breaker handcart and used for unlocking or locking the first program lock component; under the condition that the circuit breaker handcart reaches a corresponding test position, the circuit breaker handcart compresses the first elastic locking piece so as to enable the first elastic locking piece to be ejected out and unlock the first program lock assembly, and the first program lock assembly can be enabled to enter the locking state by rotating the unlocking key; under the condition that the first program lock assembly is in the locking state, the first interlocking assembly can be locked so as to lock the circuit breaker handcart at a corresponding test position and enable the unlocking key to be pulled out;

the second program lock assembly is installed on the isolation handcart; the second program lock assembly shares the unlocking key with the first program lock assembly, so that the isolation handcart can be moved only through the unlocking key under the condition that the circuit breaker handcart is kept at the corresponding test position, and isolation switches on the isolation handcart are prevented from being separated in a charged mode.

2. The interlock device for a high-voltage switchgear cabinet according to claim 1,

the circuit breaker handcart is provided with a corresponding static frame and a corresponding movable frame, and the first linkage assembly is used for enabling the corresponding movable frame to advance or retreat relative to the corresponding static frame so as to enable the circuit breaker handcart to reach a corresponding test position or working position;

the static frame is provided with a front end frame strip; the first lock assembly and the first program lock assembly are arranged on the front end frame strip;

the first program lock component comprises a first limiting piece, and the first limiting piece is provided with an extending position corresponding to the first program lock component in a locking state and a retracting position corresponding to the first program lock component in an unlocking state;

the first lock component is provided with a mobile operation socket, and the mobile operation socket is used for inserting a movable unlocking piece so as to unlock the first lock component;

the first limiting piece extends towards the direction of the first lock assembly; under the condition that the first program lock component is in a locked state, the first limiting piece extends and blocks the moving operation socket so as to lock the first lock component.

3. The interlocking device for the high-voltage switch cabinet according to claim 2, wherein a first clamping groove is formed in the first limiting member, a groove opening is oriented towards the first program lock assembly, and a clamping position is formed at the bottom of the first clamping groove;

the front end frame strip is provided with a first through hole; the first resilient latch member comprises a first straight bar and a first resilient member; the first straight rod is movably arranged in the first through hole in a penetrating way; the first straight rod is sleeved with the first elastic piece, one end of the first elastic piece is fixed on the rear side wall of the front end frame strip, and the other end of the first elastic piece is fixed on the first straight rod; a clamping and locking part is arranged at one end of the first straight rod, which is far away from the first elastic part; under the condition that the first limiting piece is located at the extending position, the position of the clamping lock part corresponds to the position of the clamping position;

when the circuit breaker handcart enters a corresponding test position, the movable frame pushes the first straight rod, and the locking part is pushed out of the clamping position.

4. The interlock device for a high voltage switch cabinet according to claim 3, wherein the first program lock assembly can be brought into the locked state and locked by rotating the unlocking key with the circuit breaker trolley located at the corresponding test position.

5. The interlocking device for the high-voltage switch cabinet according to claim 3, wherein when the first program lock assembly is in the unlocked state and the circuit breaker leaves the corresponding test position, the first elastic member rebounds to drive the latching portion to reach the first latching groove, so that the first program lock assembly is locked by the latching portion blocking the first limiting member from extending.

6. The interlocking device for the high-voltage switch cabinet according to any one of claims 1 to 5, wherein the isolation handcart further comprises a second interlocking assembly and a second elastic locking piece, and the second interlocking assembly is used for enabling the isolation handcart to reach a corresponding test position or working position;

the second elastic locking piece is used for unlocking the second program lock component under the condition that the isolation handcart is located at the corresponding working position, so that the second program lock component can enter a locking state, and the unlocking key can be pulled out.

7. The interlock device for a high voltage switchgear according to claim 6, wherein the second elastic latch member comprises a second straight rod and a second elastic member; the second elastic piece is sleeved on the second straight rod, one end of the second elastic piece is fixed on the static frame corresponding to the isolation handcart, and the other end of the second elastic piece is fixed on the second straight rod; the second straight rod movably penetrates through the corresponding static frame and the corresponding movable frame of the isolation handcart, an avoiding part is arranged at one end, located at the corresponding static frame, of the second straight rod, and a limiting baffle is arranged at the other end of the second straight rod;

the second program lock component is provided with an extensible second limiting piece, and a second clamping groove facing the second interlocking component is formed in the second limiting piece; under the condition that the isolated handcart enters the corresponding working position, the corresponding movable frame pulls the second straight rod through the limiting baffle plate, and the avoiding part is positioned in the second clamping groove.

8. The interlock device for a high voltage switch cabinet according to claim 7, wherein the second limiting member can be extended and the second interlock assembly can be locked and the unlocking key can be pulled out by rotating the unlocking key with the isolated trolley located at the corresponding working position.

9. The interlock device for a high-voltage switchgear cabinet according to claim 7,

under the condition that the isolated handcart leaves the corresponding working position, the second elastic piece rebounds and drives the avoiding portion to leave the second clamping groove, the second straight rod is clamped into the clamping groove, the second limiting piece is blocked to extend, and the unlocking key is stopped in the second program lock assembly.

10. A high-voltage switchgear cabinet, characterized in that it has an interlocking device for a high-voltage switchgear cabinet according to any of claims 1 to 9.

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