CN219873228U - Interlocking mechanism and inflatable cabinet - Google Patents

Abstract

The utility model relates to an interlocking mechanism, which comprises a locking piece, a first linkage piece and a second linkage piece. The locking piece is configured on the inflatable cabinet and is movably arranged along a first direction relative to a cable chamber door of the inflatable cabinet so as to switch between a locking state and an unlocking state. The first linkage piece is in transmission connection with the three-station isolating switch, and is used for locking the locking piece in a first direction under the condition that the three-station isolating switch is in an isolated state and an isolated state, and unlocking the locking piece under the condition that the three-station isolating switch is in a grounded state. The second linkage member is in transmission connection with the breaker switch, and locks the locking member in a first direction when the breaker switch is in a switching-off state, and unlocks the locking member when the breaker switch is in a switching-on state. The interlocking mechanism adopts a mechanical transmission mode, does not need power supply or electric control, so that electric faults can not occur, and the reliability is higher.

Description

Interlocking mechanism and inflatable cabinet

Technical Field

The utility model relates to the technical field of electrical equipment, in particular to an interlocking mechanism and an air charging cabinet.

Background

With the development of the power industry, the application of the inflatable cabinet is mature, and the scheme of the lower breaker switch is applied more and more aiming at the upper three-station isolating switch.

When the three-station isolating switch of the gas-filled cabinet is in the grounding position, the cable is only pre-grounded, and when the breaker switch is also in the closing position, the cable is in true grounding, and at the moment, the cable chamber door can be opened.

However, in the related art, the cable chamber door is usually locked by an electrically controlled lock, and such an electrically controlled lock may be electrically failed, affecting reliability.

Disclosure of Invention

In view of the above, it is necessary to provide an interlocking mechanism and an air-filled cabinet with higher reliability.

An interlocking mechanism for an inflatable cabinet having a three-position disconnector and a circuit breaker switch, the interlocking mechanism comprising:

the locking piece is configured on the inflatable cabinet and is movably arranged along a first direction relative to a cable chamber door of the inflatable cabinet so as to switch between a locking state and an unlocking state;

the first linkage piece is in transmission connection with the three-station isolating switch, and can lock the locking piece in the first direction when the three-station isolating switch is in an isolated state and an isolated state; when the three-station disconnecting switch is in a grounding connection state, the first linkage piece can unlock the locking piece; and

the second linkage piece is in transmission connection with the breaker switch, and can lock the locking piece in the first direction when the breaker switch is in a switching-off state; the second linkage member is capable of releasing the lock of the locking member when the circuit breaker switch is in a closed state.

The interlocking mechanism is of a pure mechanical structure, the first linkage piece and the second linkage piece are respectively in transmission connection with the three-station disconnecting switch and the breaker switch, and the first linkage piece and the second linkage piece can both form releasable locking on the locking piece, so that the locking piece can be unlocked only when the three-station disconnecting switch is in a grounding connection state and the breaker switch is in a closing state, and can be moved along a first direction to be switched to an unlocking state, and the other states are switched to the unlocking state by locking the locking piece, so that the locking piece cannot be switched to the unlocking state. The interlocking mechanism adopts a mechanical transmission mode, does not need power supply or electric control, so that electric faults can not occur, and the reliability is higher.

In one embodiment, the first linkage is configured with a clearance gap;

when the three-station isolating switch is in the isolating state and the isolating state, the first linkage piece is blocked at one end of the locking piece in the first direction so as to lock the locking piece in the first direction; when the three-station disconnecting switch is in the grounding connection state, the movable notch of the first linkage piece faces the locking piece, so that the locking piece can move in the movable notch along the first direction, and the locking of the locking piece is released.

In one embodiment, the first linkage member can rotate under the drive of the three-station disconnecting switch, and when the three-station disconnecting switch is switched to the grounding connection state, the first linkage member rotates until the movable notch faces the locking member;

the first linkage member is provided with two guide inclined planes which are connected in an intersecting manner, and the movable gap is defined by the two guide inclined planes.

In one embodiment, the locking piece is provided with a clamping groove along the direction intersecting with the first direction;

when the breaker switch is in the opening state, the second linkage member is clamped in the clamping groove so as to lock the locking member in the first direction; and under the condition that the breaker switch is in the closing state, the second linkage piece is separated from the clamping groove so as to release the locking of the locking piece.

In one embodiment, the interlocking mechanism further comprises a closing and opening indicating piece, the closing and opening indicating piece can rotate under the drive of the breaker switch and comprises a closing indicating part and an opening indicating part, and the closing indicating part rotates to face the front of the gas-filled cabinet when the breaker switch is in the closing state; when the breaker switch is in the open state, the open indication part is turned to face the front of the air charging cabinet.

In one embodiment, the second linkage member is in transmission connection with the breaker switch through the closing and opening indicating member, and comprises a clamping member, a push rod and a reset torsion spring, wherein the closing and opening indicating member pushes the push rod to drive the clamping member to be separated from the clamping groove in the process of turning to the closing indicating part to face the front surface of the gas-filled cabinet; the closing and opening indicating piece is clamped into the clamping groove under the action of the elastic force of the reset torsion spring in the process of turning to the opening indicating part to face the front face of the air charging cabinet.

In one embodiment, the interlocking mechanism further comprises an unlocking spring, and the unlocking spring is connected with the locking piece;

when the first linkage piece and the second linkage piece are unlocked to the locking piece, the unlocking spring drives the locking piece to move along the first direction so as to switch from the locking state to the unlocking state.

In one embodiment, the breaker switch includes a brake release button and a brake switch button, and the locking member is configured with a stop structure, and when the locking member is in the unlocking state, the stop structure is located on a key stroke of the brake release button.

In one embodiment, the interlocking mechanism further comprises a guide pin provided on one of the locking member and the inflatable cabinet, the other of the locking member and the inflatable cabinet being configured with a guide slot that cooperates with the guide pin and extends in the first direction.

An inflatable cabinet comprising an interlocking mechanism as described above.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an interlock mechanism mounted to an inflatable cabinet according to an embodiment of the present utility model.

Fig. 2 is a schematic structural view of the air charging cabinet shown in fig. 1 after the three-station disconnecting switch mounting plate and the breaker switch mounting plate are removed.

Fig. 3 is an enlarged schematic view of the interlock mechanism shown in fig. 2 at a.

Fig. 4 is a schematic structural view of a first link in the interlocking mechanism shown in fig. 1.

Fig. 5 is a schematic structural view of a third portion of the interlocking mechanism shown in fig. 1.

Fig. 6 is an enlarged schematic view of the interlock mechanism shown in fig. 2 at B.

Reference numerals illustrate: 100. an interlocking mechanism; 10. a locking member; 11. a first portion; 13. a second portion; 131. a stop structure; 15. a third section; 30. a first linkage member; 50. a second linkage member; 51. a clamping piece; 53. a push rod; 55. a return spring; 70. a closing/opening indicator; 71. a closing instruction unit; 73. a brake-off indication part; 91. an unlocking spring; 93. a guide pin; 200. an air charging cabinet; 201. a cable compartment door; 203. a circuit breaker switch; 2031. a brake separating key; 2033. closing a key; 205. a three-station isolating switch mounting plate; 207. a breaker switch mounting plate; q, movable notch; x, guiding inclined plane; C. a clamping groove; D. a guide groove.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

Furthermore, the term "and/or" is merely an association relation describing the association object, meaning that three relations may exist, e.g. a and/or B, may be represented: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship. The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1, an embodiment of the present utility model provides an inflatable cabinet 200 including an interlock mechanism 100. The interlock mechanism 100 can lock the cable chamber door 201 of the air tank 200 and unlock under specific conditions to secure the safety of the electrical operation.

The charging cabinet 200 has a three-position disconnecting switch (not shown), a breaker switch 203, a three-position disconnecting switch mounting plate 205 and a breaker switch mounting plate 207, the three-position disconnecting switch is mounted on the upper portion of the charging cabinet 200 through the three-position disconnecting switch mounting plate 205, and the breaker switch 203 is mounted below the three-position disconnecting switch in the charging cabinet 200 through the breaker switch mounting plate 207, so as to form an upper three-position disconnecting switch and a lower scheme of the breaker switch 203.

The three-station isolating switch has three station states of an isolating state, an isolating state and a grounding state, and can be also called a closing state, an isolating state and a grounding state, and the corresponding three stations are respectively called a closing position, an isolating position and a grounding position. The breaker switch 203 has two position states of a closing state and a opening state.

As described in the background art, in order to ensure operation safety during maintenance, the three-position disconnecting switch in the air charging cabinet 200 needs to be switched to the grounding connection state first, at this time, the cable is only pre-grounded, and the cable must be grounded when the breaker switch 203 is in the closing state. That is, the interlock mechanism 100 should be capable of allowing the cable chamber door 201 of the air-packing compartment 200 to be opened when the three-position disconnector is in the grounded state and the circuit breaker switch 203 is in the closed state, and locking the cable chamber door 201 to ensure that it is not opened when the three-position disconnector or the circuit breaker switch 203 is in the rest of the states.

Referring to fig. 2, an embodiment of the present utility model provides an interlocking mechanism 100 including a locking member 10, a first linkage member 30 and a second linkage member 50. The locking member 10 is disposed on the gas-filled cabinet 200 and is movably disposed along a first direction (e.g., Y direction in fig. 1) relative to a cable door 201 of the gas-filled cabinet 200 to switch between a locked state and an unlocked state. The first linkage 30 is in driving connection with the three-position disconnecting switch, and when the three-position disconnecting switch is in the closed state and the separated state, the first linkage 30 can lock the locking member 10 in the first direction. When the three-position disconnecting switch is in the ground engaging state, the first link 30 can release the lock of the lock member 10. The second link 50 is in driving connection with the breaker switch 203, and the second link 50 can lock the lock 10 in the first direction when the breaker switch 203 is in the open state. When the breaker switch 203 is in the closed state, the second link 50 can release the lock of the lock 10.

The interlock mechanism 100 is used for the gas-filled cabinet 200, and specifically, is used to lock the cable chamber door 201 of the gas-filled cabinet 200, and allows the cable chamber door 201 to be opened only when a specific condition is satisfied. Wherein the interlocking mechanism 100 locks the cable compartment door 201, in particular by means of its locking element 10. As can be appreciated, the locked state and the unlocked state of the locking member 10 are for the cable chamber door 201, in which the locking member 10 locks the cable chamber door 201 so as not to be normally opened, and in which the locking member 10 loses the lock of the cable chamber door 201 so that the cable chamber door 201 can be opened.

The first linkage member 30 and the second linkage member 50 are respectively in transmission connection with the three-position disconnecting switch and the circuit breaker switch 203, in other words, the first linkage member 30 and the second linkage member 50 are respectively driven by the three-position disconnecting switch and the circuit breaker switch 203, and whether the two have a direct relationship with the position states of the three-position disconnecting switch and the circuit breaker switch 203 to lock the locking member 10. The situation that the three-station isolating switch is in the isolation state and the isolation state refers to the situation that the three-station isolating switch is in any one of the isolation state and the isolation state.

It will be appreciated that when either of the first linkage 30 and the second linkage 50 locks the locking member 10 in the first direction, specifically, the locking member 10 in the locked state, the locking member 10 cannot move in the first direction, and cannot be switched from the locked state to the unlocked state.

The interlocking mechanism 100 is of a purely mechanical structure, the first linkage member 30 and the second linkage member 50 are respectively in transmission connection with the three-position disconnecting switch and the breaker switch 203, and the first linkage member 30 and the second linkage member 50 can both form releasable locking on the locking member 10, so that the locking member 10 can be unlocked only when the three-position disconnecting switch is in a grounded state and the breaker switch 203 is in a closed state, and can be moved along the first direction to be switched to an unlocked state, and the other states are switched to the unlocked state by locking the locking member 10, so that the locking member 10 cannot be switched to the unlocked state. The interlocking mechanism 100 adopts a mechanical transmission mode, and does not need power supply or electric control, so that electric faults can not occur, and the reliability is higher.

Further, the interlocking mechanism 100 further includes a guide pin 93, the guide pin 93 is provided on one of the locking member 10 and the air tank 200, and the other of the locking member 10 and the air tank 200 is configured with a guide groove D that cooperates with the guide pin 93 and extends in the first direction.

The guide pin 93 cooperates with the guide slot D and is at least partially positioned within the guide slot D such that relative movement between the two in the first direction occurs under the coacting guide of the guide pin 93 and the guide slot D.

At the same time, the guide groove D can also limit the movable range of the locking member 10 in the first direction, that is, the length range of the guide groove D, which is the movable range of the locking member 10 in the first direction. When the locking member 10 moves to the state where one end of the guide groove D abuts the guide pin 93, the locking member 10 is in the unlocked state, and when the other end of the guide groove D abuts the guide pin 93, the locking member 10 is in the locked state.

In one embodiment, the guide pin 93 is provided on the air tank 200 and the guide groove D is formed on the locking member 10.

In some embodiments, the interlock mechanism 100 further includes an unlocking spring 91, the unlocking spring 91 being connected to the lock 10. When the first and second links 30 and 50 release the lock of the lock 10, the unlock spring 91 drives the lock 10 to move in the first direction to switch from the locked state to the unlocked state.

In other words, the unlocking spring 91 generates an elastic force acting on the lock 10, and when the movement of the lock 10 to the unlocked state is referred to as an unlocking movement and the movement of the lock 10 to the locked state is referred to as a locking movement, the elastic force has a component force in at least the movement direction of the unlocking movement, so that the lock 10 can be automatically switched to the unlocked state after the locking of the first link 30 and the second link 50 is lost.

It will be appreciated that the locking movement of the locking member 10 may be achieved by external force such as manual pulling or pushing by the first linkage member 30. In other embodiments, the locking member 10 may be unlocked by an external force such as manual pulling, driving of the first linkage member 30, etc., and automatically locked by the elastic force of a spring, which is not limited herein.

Referring to fig. 3 and fig. 4 together, in some embodiments, the breaker switch 203 includes a switch-off key 2031 and a switch-on key 2033, the locking member 10 is configured with a stop structure 131, and when the locking member 10 is in an unlocked state, the stop structure 131 is located on a key stroke of the switch-off key 2031.

The breaker switch 203 is in a separated state and a closed state when the separated key 2031 and the closed key 2033 are pressed. The stop structure 131 is configured on the locking member 10, and also moves along with the locking member 10 in the first direction, and moves along with the key stroke of the opening key 2031 when the locking member 10 moves to the unlocked state.

It is understood that the stop structure 131 being on the key stroke of the opening key 2031 means that the stop structure 131 is on the key stroke of the opening key 2031, and may specifically mean that the stop structure 131 is on the back of the opening key 2031. At this time, the opening key 2031 is blocked by the stopper structure 131 and cannot be pressed. Accordingly, when the locking member 10 moves to the locked state, the stop structure 131 follows the movement to the key stroke of the release button 2031. At this time, the brake release key 2031 can be normally pressed.

The stop structure 131 can block the opening key 2031 when the locking member 10 is in an unlocked state, that is, when the cable chamber door 201 is in a state capable of being opened, so as to prevent the opening key from being pressed by misoperation, and improve the reliability of the interlocking mechanism 100.

Referring to fig. 5, in some embodiments, the first linkage member 30 is configured with a movable gap Q. When the three-position disconnecting switch is in the isolated state and the isolated state, the first linkage member 30 is blocked at one end of the locking member 10 in the first direction so as to lock the locking member 10 in the first direction; when the three-position disconnecting switch is in the grounding connection state, the movable notch Q of the first linkage member 30 faces the locking member 10, so that the locking member 10 can move in the first direction in the movable notch Q to release the locking of the locking member 10.

The condition that the three-station isolating switch is in the isolated state and the isolated state refers to the condition that the three-station isolating switch is in any one of the isolated state and the isolated state. At this time, the first link 30 is blocked at one end of the locking member 10 in the first direction and can be prevented from moving in the first direction. When the three-position disconnecting switch is in the grounding connection state, the movable notch Q faces the locking member 10, and the locking member 10 can move within the range of the movable notch Q, and it can be understood that the size of the movable notch Q should be enough for the locking member 10 to be capable of moving from the locking state to the unlocking state.

Further, the first linkage member 30 can rotate under the drive of the three-position isolating switch, and when the three-position isolating switch is switched to the grounding connection state, the first linkage member 30 rotates to the movable notch Q towards the locking member 10. The first linkage member 30 is configured with two guide inclined surfaces X which are connected to each other, and the movable gap Q is defined by the two guide inclined surfaces X.

As the first linkage member 30 rotates, the position where the first linkage member 30 can make contact with the locking member 10 also changes continuously, and when the first linkage member 30 rotates until the movable gap Q faces the locking member 10, the locking member 10 obtains a larger movement space in the first direction, and one end can enter the movable gap Q. After one end of the locking member 10 enters the movable notch Q and is switched to the unlocking state, the first linkage member 30 rotates, and the locking member 10 can move along the first direction under the driving of the guiding inclined plane X until the locking member is separated from the movable notch Q and is switched to the locking state.

In this way, the first linkage member 30 in transmission connection with the three-position disconnecting switch not only can lock the locking member 10, but also can drive the locking member 10 to move to realize state switching, and can enable the locking member 10 to synchronously enter the locking state when the three-position disconnecting switch enters any one of the isolated state and the isolated state.

In one embodiment, the first linkage member 30 is a plate-like structure with a notch, which can be approximately seen as a circular plate with an angular notch. It will be appreciated that in other embodiments, the first linkage member 30 may be a cam, so long as the locking member 10 can be driven to move in the first direction by rotation, which is not particularly limited herein.

Specifically, at least one of the two guide inclined surfaces X is in arc transition with the outer edge of the first linkage 30. The arcuate transition helps the first linkage 30 more smoothly drive the latch 10 for state switching.

Preferably, the locking member 10 is formed with a flange at one end in the first direction near the first linkage member 30 so as to form a fit with the first linkage member 30, and is blocked or pushed by the first linkage member 30, thereby reducing the requirement for assembly accuracy.

Referring to fig. 6, in some embodiments, the locking member 10 is configured with a slot C along a direction intersecting the first direction. When the breaker switch 203 is in the open state, the second link 50 is engaged with the latch groove C to lock the lock member 10 in the first direction. When the breaker switch 203 is in the on state, the second link 50 is disengaged from the catch C to release the lock of the lock member 10.

The second link 50 locks the locking member 10 by a snap-fit manner, which is simple and reliable.

Preferably, the groove depth direction of the clamping groove C is perpendicular to the first direction, so that the locking formed by the second linkage piece 50 clamped into the clamping groove C is more stable.

Further, the interlocking mechanism 100 further includes a closing/opening indicator 70, the closing/opening indicator 70 can be driven by the breaker switch 203 to rotate, and includes a closing indicator 71 and an opening indicator 73, and when the breaker switch 203 is in a closing state, the closing indicator 71 rotates to face the front of the gas-filled tank 200. When the breaker switch 203 is in the open state, the open indication portion 73 is turned to face the front of the air tank 200.

The front side of the air tank 200 is the side toward which an operator is facing when working on the air tank 200. The switching-on indication part 71 and the switching-off indication part 73 should be distinguishable, and specifically, the operator can conveniently distinguish the switching-on indication part and the switching-off indication part by forming ideographic Chinese characters such as switching-on and switching-off, or by means of colors, shapes and the like.

The on/off indicator 70 is driven by the breaker switch 203 and responds accordingly to the state of the breaker switch 203 so that the operator can accurately determine the current situation.

More recently, the second linkage member 50 is in transmission connection with the breaker switch 203 through the closing and opening indicating member 70, and includes a clamping member 51, a push rod 53 and a reset torsion spring, and in the process of turning to the closing indicating portion 71 to face the front of the air charging cabinet 200, the closing and opening indicating member 70 pushes the push rod 53 to drive the clamping member 51 to be separated from the clamping groove C. The closing/opening indicator 70 is turned to the opening/opening indicator 73 to face the front of the air tank 200, and the engaging member 51 is engaged into the engaging groove C by the elastic force of the return torsion spring.

In this way, the circuit breaker switch 203, the on/off indicator 70 and the second linkage member 50 form a linkage, when the circuit breaker switch 203 is switched to the on state, the on/off indicator 70 correspondingly rotates until the on indicator 71 faces the front of the gas-filled tank 200, and in the process, the push rod 53 pushes the engaging member 51 to rotate to be separated from the clamping groove C. When the breaker switch 203 is switched to the open state, the open/close indicator 70 rotates correspondingly until the open indicator 73 faces the front of the air charging cabinet 200, the engaging piece 51 loses the pushing of the open/close indicator 70, and rotates to be engaged in the engaging groove C again under the pushing of the reset torsion spring, so as to lock the locking piece 10.

In some embodiments, the latch 10 includes a first portion 11, a second portion 13, and a third portion 15, the first portion 11 and the third portion 15 being located at both ends in a first direction, the second portion 13 being located between the first portion 11 and the third portion 15.

Wherein the guide groove D is formed on the first portion 11, and the stop structure 131 is a folded edge formed on the second portion 13. The clamping groove C can be an annular groove formed on the third part 15, and the clamping piece 51 is provided with a semicircular notch matched with the annular groove. The unlocking spring 91 is connected to the third portion 15, and in the locked state, the third portion 15 is blocked on the opening and closing path of the cable chamber door 201 to exert a locking effect thereon, preventing it from being opened.

In the interlocking mechanism 100, when the three-position disconnecting switch is in either one of the closed state and the separated state, the lock member 10 is in the locked state. When the cable door 201 needs to be opened for operation, the three-station disconnecting switch is switched to the grounding connection state, so that the first linkage member 30 is driven to rotate until the movable notch Q faces the end part of the locking member 10, then the breaker switch 203 is switched to the switching connection state, the switching-on indication part 71 of the switching-on and switching-off indication member 70 is driven to face the front of the air charging cabinet 200, and the clamping member 51 of the second linkage member 50 is pushed to be separated from the clamping groove C in the rotating process of the switching-on and switching-off indication member 70. After the locking of the first and second links 30 and 50 is lost, the locking member 10 is moved to the unlocked state by the unlocking spring 91, and at the same time, the stopper structure 131 is moved to the back of the opening key 2031. At this time, the cable door 201 may be opened and the brake release key 2031 may not be pressed.

After the operation is completed, the cable chamber door 201 is closed, the state of the three-station isolating switch is switched, the first linkage member 30 is driven to rotate, the locking member 10 is driven to move to a locking state through the guide inclined plane X, and meanwhile, the locking member 10 is locked by the first linkage member 30. At this time, the opening key 2031 is pressed, the opening/closing indicator 70 is rotated until the opening indicator 73 faces the front of the air tank 200, the engaging piece 51 of the second link 50 is again engaged into the engaging groove C by the reset torsion spring, and the lock piece 10 is locked by the second link 50. Up to this point, the lock member 10 is not only in the locked state, but also locked by the first and second link members 30 and 50.

The interlocking mechanism 100 is of a purely mechanical structure, and is in linkage with the three-station isolating switch and the breaker switch 203, and through a simple structure, the protection function is realized, the operation is convenient, and the performance is more reliable.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. An interlocking mechanism for an inflatable cabinet having a three-position disconnector and circuit breaker switch (203), the interlocking mechanism comprising:

a locking piece (10) which is configured on the inflatable cabinet and is movably arranged along a first direction relative to a cable chamber door (201) of the inflatable cabinet so as to switch between a locking state and an unlocking state;

the first linkage piece (30) is in transmission connection with the three-station isolating switch, and the first linkage piece (30) can lock the locking piece (10) in the first direction when the three-station isolating switch is in an isolated state and an isolated state; when the three-position disconnecting switch is in a grounding connection state, the first linkage piece (30) can release the locking of the locking piece (10); and

a second linkage member (50) in driving connection with the circuit breaker switch (203), the second linkage member (50) being capable of locking the locking member (10) in the first direction when the circuit breaker switch (203) is in a disconnected state; when the circuit breaker switch (203) is in a closed state, the second linkage member (50) can release the locking of the locking member (10).

2. The interlocking mechanism according to claim 1, characterized in that the first linkage member (30) is configured with a clearance gap (Q);

when the three-position disconnecting switch is in the disconnecting state and the disconnecting state, the first linkage piece (30) is blocked at one end of the locking piece (10) in the first direction so as to lock the locking piece (10) in the first direction; when the three-position disconnecting switch is in the grounding connection state, the movable notch (Q) of the first linkage piece (30) faces the locking piece (10), so that the locking piece (10) can move in the first direction in the movable notch (Q) to unlock the locking piece (10).

3. The interlocking mechanism according to claim 2, wherein the first linkage member (30) is rotatable under the drive of the three-position disconnecting switch, and when the three-position disconnecting switch is switched to the ground engaging state, the first linkage member (30) rotates until the movable gap (Q) faces the locking member (10);

the first linkage element (30) is configured with two guide inclined planes (X), the two guide inclined planes (X) are connected in an intersecting manner, and the movable gap (Q) is defined by the two guide inclined planes (X).

4. Interlocking mechanism according to claim 1, characterized in that the locking element (10) is configured with a clamping groove (C) in a direction intersecting the first direction;

when the breaker switch (203) is in the open state, the second linkage member (50) is engaged with the clamping groove (C) so as to lock the locking member (10) in the first direction; when the breaker switch (203) is in the closed state, the second linkage member (50) is separated from the clamping groove (C) so as to release the locking of the locking member (10).

5. The interlocking mechanism according to claim 4, further comprising a closing and opening indicator (70), the closing and opening indicator (70) being rotatable under the drive of the circuit breaker switch (203) and comprising a closing indicator portion (71) and an opening indicator portion (73), the closing indicator portion (71) being rotated towards the front face of the gas-filled tank with the circuit breaker switch (203) in the closed state; when the breaker switch (203) is in the open state, the open indication unit (73) is turned to face the front surface of the air-charging cabinet.

6. The interlocking mechanism according to claim 5, wherein the second linkage member (50) is in transmission connection with the breaker switch (203) through the closing and opening indicating member (70), and comprises a clamping member (51), a push rod (53) and a reset torsion spring, and the closing and opening indicating member (70) pushes the push rod (53) to drive the clamping member (51) to be separated from the clamping groove (C) in the process of turning to the closing indicating portion (71) to face the front of the air charging cabinet; and the clamping piece (51) is clamped into the clamping groove (C) under the action of the elastic force of the reset torsion spring in the process that the switching-on and switching-off indication piece (70) rotates to the front face of the air charging cabinet, and the switching-off indication part (73) faces to the front face of the air charging cabinet.

7. The interlocking mechanism according to any one of claims 1-6, further comprising an unlocking spring (91), the unlocking spring (91) being connected to the locking member (10);

when the first linkage member (30) and the second linkage member (50) release the locking of the locking member (10), the unlocking spring (91) drives the locking member (10) to move along the first direction so as to switch from the locking state to the unlocking state.

8. The interlocking mechanism according to any one of claims 1-6, wherein the circuit breaker switch (203) comprises a breaking key (2031) and a closing key (209) (2033), the locking member (10) is configured with a stop structure (131), and when the locking member (10) is in the unlocked state, the stop structure (131) is on a key stroke of the breaking key (2031).

9. The interlocking mechanism according to any one of claims 1-6, further comprising a guide pin (93), the guide pin (93) being provided to one of the locking member (10) and the inflatable tank, the other of the locking member (10) and the inflatable tank being configured with a guide groove (D), the guide groove (D) cooperating with the guide pin (93) and extending in the first direction.

10. An inflatable cabinet comprising an interlock mechanism according to any one of claims 1 to 9.