CN217641044U

CN217641044U - Mechanical interlocking device and inflatable cabinet

Info

Publication number: CN217641044U
Application number: CN202221130893.8U
Authority: CN
Inventors: 孙一帆; 魏展培; 厉复新; 杨圣彬; 袁丽丹; 李金辉; 黄林利; 欧阳萍
Original assignee: Tbea Yunji Electric Co ltd
Current assignee: Tbea Yunji Electric Co ltd
Priority date: 2022-05-12
Filing date: 2022-05-12
Publication date: 2022-10-21
Anticipated expiration: 2032-05-12

Abstract

The utility model relates to a mechanical interlock and aerify cabinet, mechanical interlock locate between circuit breaker and the three station isolator, have first state and second state, and include: the shielding piece is movably arranged along a first direction of the isolation Kong Lianxian and the grounding hole in the three-station isolation switch; the linkage assembly is in linkage connection with the shielding piece; when the circuit breaker is in the first state, the shielding piece moves to the shielding isolation hole and the grounding hole along the first direction, the linkage assembly allows a closing switch on the circuit breaker to be opened, the circuit breaker can be closed, and meanwhile, the isolation or grounding function on the three-station isolation switch is avoided. When the second state, the shielding piece moves to any one of the opening isolation hole or the grounding hole along the first direction, the linkage assembly blocks the switching-on switch to be opened under the driving of the shielding piece, the three-station isolation switch can be enabled to have an isolation or grounding function, and meanwhile the switching-on of the circuit breaker can be avoided. Therefore, the mechanical interlocking device is simple in overall structure and convenient to use.

Description

Mechanical interlocking device and inflatable cabinet

Technical Field

The utility model relates to an aerify cabinet technical field, especially relate to mechanical interlock between circuit breaker and the three-station isolator.

Background

Along with the development of the power industry, the application of the gas-filled cabinet is more and more mature, the interlocking requirement of the gas-filled cabinet is more and more, and the three-station isolating switch has an obvious disconnection point, can realize the isolating function and the grounding function and is mainly used for equipment maintenance.

However, the three-position isolating switch does not have a breaking function, cannot be switched on and off with a load, and can be switched on and off only under the condition that the load is disconnected; the circuit breaker can normally open and close and break the load and is used for controlling the equipment, but the circuit breaker has no obvious disconnection point, can not visually judge whether a loop is disconnected or not, and is not suitable for overhauling the equipment. Therefore, in order to achieve the purpose of breaking a loop with energy band load and enabling the loop to have obvious breaking points, and facilitate overhaul and maintenance, a mechanical interlocking device must be added between the three-position disconnecting switch and the circuit breaker so as to meet the requirements that the three-position disconnecting switch can be switched on and off and grounded only when the circuit breaker breaks the load, and the circuit breaker is not allowed to be operated when the three-position disconnecting switch is operated.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a mechanical interlock device to solve the problem of complicated structure and inconvenient use of the conventional mechanical interlock device.

The utility model provides a mechanical interlock, locates between circuit breaker and the three station isolator, mechanical interlock has first state and second state, and includes:

the shielding piece is movably arranged along a first direction of the isolation Kong Lianxian and the grounding hole in the three-station isolation switch;

the linkage assembly is in linkage connection with the shielding piece;

when the circuit breaker is in the first state, the shielding piece moves to shield the isolating hole and the grounding hole along the first direction, and the linkage assembly allows a closing switch on the circuit breaker to be opened; when the second state, the shielding piece moves to the position of opening any one of the isolation hole and the grounding hole along the first direction, and the linkage assembly blocks the switching-on switch from being switched on under the driving of the shielding piece.

When the mechanical linkage device is in the first state, the shielding piece moves to the shielding isolation hole and the grounding hole along the first direction, the linkage assembly allows a closing switch on the circuit breaker to be opened, so that the circuit breaker can be closed, and the isolation or grounding function on the three-station isolation switch is avoided. When the second state, the shielding piece moves to any one of the opening isolation hole or the grounding hole along the first direction, the linkage assembly blocks the switching-on switch to be opened under the driving of the shielding piece, so that the three-station isolation switch can perform the isolation or grounding function, and meanwhile, the switching-on of the circuit breaker can be avoided. Like this, through simple structure's mechanical interlock alright avoid circuit breaker and three station isolator simultaneous workings, realize circuit breaker and three station isolator's dislocation and open, overall structure is simple, the dependable performance, convenient to use.

In one embodiment, the shielding piece comprises a main body, a first shielding part and a second shielding part, wherein the first shielding part and the second shielding part are arranged on the main body at intervals along the first direction;

when the grounding hole is in the first state, the first shielding part and the second shielding part respectively shield the grounding hole and the isolating hole; in the second state, the first shielding part moves towards the direction close to the isolation hole and opens the grounding hole, or the second shielding part moves towards the direction close to the grounding hole and opens the isolation hole.

In one embodiment, the linkage assembly comprises a brake cable and a baffle, the baffle is movably arranged on the circuit breaker, and the brake cable is connected between the baffle and the main body;

when the first state is reached, the brake cable is in a natural state, and the baffle and the closing path of the closing switch are staggered; and in the second state, the brake cable is pulled by the moved main body and drives the baffle to move to be blocked on the opening path of the closing switch.

In one embodiment, the baffle is rotatably arranged on the circuit breaker, and the baffle is provided with a first end and a second end which are positioned at two sides of a rotatable connection point of the baffle and the circuit breaker;

wherein one of the first end and the second end is connected with the brake cable, and the other of the first end and the second end can rotate to block or stagger an opening path of the closing switch.

In one embodiment, the first end is connected to the brake cable, and in the first state, the second end is inclined toward a side where the shielding member is located, and the closing switch is located on a side of the second end facing away from the shielding member.

In one embodiment, the linkage assembly further comprises an elastic reset piece, the elastic reset piece is elastically abutted to the baffle, and when the baffle rotates, the elastic reset piece stores elastic potential energy which drives the baffle to reset to be dislocated with an opening path of the closing switch.

In one embodiment, the shutter further comprises a locking assembly for locking the shutter when the mechanical interlock is in the first state and for unlocking the shutter when the mechanical interlock is in the second state.

In one embodiment, the locking assembly includes a transmission member and a locking member, the transmission member is sleeved on a large shaft of the circuit breaker, the locking member is rotatably connected to the transmission member, and the transmission member drives the locking member to lock or unlock the shielding member under the driving of the large shaft.

In one embodiment, the transmission member is a cam member sleeved on the large shaft, and the locking member is driven by the cam member to move towards and away from the shielding member and clamp or release the shielding member.

The utility model provides an aerify cabinet, includes circuit breaker, three station isolator and above-mentioned mechanical interlock, mechanical interlock locates the circuit breaker with between the three station isolator, and have first state with the second state.

Drawings

Fig. 1 is a schematic structural view of a mechanical interlock device according to an embodiment of the present invention;

FIG. 2 is a schematic view of the construction of the blanking member of the mechanical interlock device of FIG. 1;

fig. 3 is a partial schematic view of the mechanical interlock device of fig. 1.

Reference numerals: 100. a mechanical interlock; 10. a shield; 12. a main body; 14. a first shielding portion; 16. a second shielding portion; 30. a linkage assembly; 32. a brake cable; 34. a baffle plate; 341. a first end; 343. a second end; 36. an elastic reset member; 50. a locking assembly; 52. a transmission member; 54. a locking member; 300. a circuit breaker; 301. a closing switch; 303. a large shaft; 500. a three-position isolating switch; 501. an isolation hole; 503. and a ground hole.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device 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 present invention.

Furthermore, the terms "first", "second" and "first" 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 defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" 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 as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1, in one embodiment of the present invention, a mechanical interlock device 100 is provided, which is disposed between a circuit breaker 300 and a three-position disconnecting switch 500, the circuit breaker 300 has a closing switch 301, and the three-position disconnecting switch 500 has a grounding hole 503 and an isolating hole 501, which are disposed at intervals.

The mechanical interlock device 100 has a first state and a second state, and includes a shielding member 10 and a linkage assembly 30, the shielding member 10 is movably disposed along a first direction connecting a ground hole 503 and an isolation hole 501 of a three-position isolating switch 500, such that the shielding member 10 can shield or open the ground hole 503 and the isolation hole 501 when moving along the first direction. The linkage assembly 30 is in linkage connection with the shielding member 10, when the shielding member 10 moves to the shielding isolation hole 501 and the grounding hole 503 along the first direction in the first state, the linkage assembly 30 allows the closing switch 301 on the circuit breaker 300 to be turned on, so that the circuit breaker 300 can be closed, and the isolation or grounding function on the three-position isolating switch 500 is avoided. In the second state, the shielding member 10 moves to open any one of the isolating hole 501 or the grounding hole 503 along the first direction, and the linkage assembly 30 blocks the switch-on switch 301 from being turned on under the driving of the shielding member 10, so that the three-position isolating switch 500 can perform an isolating or grounding function, and the switch-on of the circuit breaker 300 can be avoided.

Like this, through simple structure's mechanical interlock 100 alright avoid circuit breaker 300 and three-position isolator 500 simultaneous working, realize circuit breaker 300 and three-position isolator 500's dislocation and open, overall structure is simple, the dependable performance, convenient to use.

Referring to fig. 1-2, the shielding member 10 further includes a main body 12, a first shielding portion 14 and a second shielding portion 16, and the first shielding portion 14 and the second shielding portion 16 are disposed on the main body 12 at an interval along a first direction. In the first state, the first shielding portion 14 and the second shielding portion 16 shield the grounding hole 503 and the isolation hole 501, respectively, so as to prevent the three-position isolating switch 500 from using the isolating and grounding functions. In the second state, the first shielding portion 14 moves toward the isolation hole 501 to open the ground hole 503, or the second shielding portion 16 moves toward the isolation hole 503 to open the isolation hole 501, that is, the whole shielding member 10 moves toward the isolation hole 501, for example, moves rightward, so that the first shielding portion 14 that originally shields the ground hole 503 moves rightward to open the ground hole 503, and the three-position isolator 500 is allowed to perform the grounding operation. Alternatively, the whole shielding member 10 moves towards the side of the grounding hole 503, for example, moves to the left, so that the second shielding portion 16, which originally shields the isolation hole 501, moves to the left to open the isolation hole 501, and the three-position isolation switch 500 is allowed to perform the isolation operation.

Specifically, the linkage assembly 30 includes a shutter wire 32 and a flapper 34, the flapper 34 being movably disposed on the circuit breaker 300, the shutter wire 32 being connected between the flapper 34 and the main body 12. In the first state, the brake cable 32 is in a natural state, and the flapper 34 is misaligned with the closing path of the closing switch 301 to allow the closing switch 301 to be opened and the circuit breaker 300 to be closed. In the second state, the gate line 32 is pulled by the moved main body 12, and drives the blocking plate 34 to move to block the opening path of the closing switch 301, so as to block the opening of the closing switch 301. That is, when the shielding member 10 moves from the middle position to the left or the right to open the ground hole 503 or the isolation hole 501, the shielding member 10 pulls the gate wire 32, and the gate wire 32 is pulled to the left or the right, and further the blocking plate 34 is driven to rotate to block the opening path of the closing switch 301, so as to block the opening of the closing switch 301.

Referring to fig. 1 and 3, in some embodiments, the blocking plate 34 is rotatably disposed on the circuit breaker 300, and the blocking plate 34 has a first end 341 and a second end 343 disposed at two sides of a rotatable connection point with the circuit breaker 300. One of the first end 341 and the second end 343 is connected to the gate line 32, and the other of the first end 341 and the second end 343 is rotatable to block or stagger the opening path of the closing switch 301.

Specifically, the first end 341 is connected to the brake cable 32, and in the first state, the second end 343 is disposed to be inclined toward a side where the shielding member 10 is located, the closing switch 301 is located at a side of the second end 343 opposite to the shielding member 10, and the second end 343 is configured to block the opening of the closing switch 301. Thus, the end of the second end 343 remote from the first end 341 is inclined toward the shutter 10 to misalign the second end 343 with the closing switch 301 in the first state, allowing the closing switch 301 to be turned on. In addition, in the second state, when the first end 341 is pulled by the brake cable 32 to rotate toward the shielding member 10, the second end 343 is driven to rotate in a direction away from the shielding member 10, and further rotates to a closing path of the closing switch 301, so as to block the closing switch 301 from being opened.

In some embodiments, the linkage assembly 30 further includes an elastic restoring member 36, the elastic restoring member 36 elastically abuts against the blocking plate 34, and stores elastic potential energy that drives the blocking plate 34 to be restored to be misaligned with the opening path of the closing switch 301 when the blocking plate 34 rotates. Therefore, when the shielding member 10 moves, the blocking plate 34 is driven to rotate by the brake cable 32, so that the elastic resetting member 36 of the elastic disc drive of the blocking plate 34 stores elastic potential energy, and when the shielding member 10 resets to the shielding grounding hole 503 and the isolation hole 501, the elastic resetting member 36 can release the stored elastic potential energy to drive the blocking plate 34 to reset to be dislocated with the opening path of the closing switch 301, so that the interlocking device resets from the second state to the first state.

Referring to fig. 1, in some embodiments, the mechanical interlock device 100 further comprises a locking assembly 50, the locking assembly 50 is configured to lock the shield 10 when the mechanical interlock device 100 is in the first state to prevent the shield 10 from moving and accidentally opening the grounding hole 503 and the isolation hole 501. The locking assembly 50 also serves to unlock the screen 10 when the mechanical interlock device 100 is in the second state, thereby allowing the screen 10 to move in the first direction to open the ground opening 503 or the isolating opening 501.

Further, the locking assembly 50 includes a transmission member 52 and a locking member 54, the transmission member 52 is sleeved on a large shaft 303 of the circuit breaker 300, the locking member 54 is rotatably connected to the transmission member 52, and the transmission member 52 drives the locking member 54 to lock or unlock the shielding member 10 under the driving of the large shaft 303. When the closing switch 301 is turned on, the large shaft 303 is controlled to rotate in one direction, so as to drive the transmission member 52 and the locking member 54 to interlock, so that the shielding member 10 is locked by the locking member 54, and the shielding member 10 reliably shields the grounding hole 503 and the isolation hole 501. In addition, when the opening switch on the circuit breaker 300 is turned on, the large shaft 303 rotates in the reverse direction, and then the transmission member 52 and the locking member 54 are driven, so that the locking member 54 is separated from the shielding member 10, the shielding member 10 is unlocked, and the shielding member 10 is allowed to move to use the grounding or isolating function of the three-position circuit breaker.

Specifically, the transmission member 52 is a cam member sleeved on the large shaft 303, and the locking member 54 moves closer to and away from the shielding member 10 under the driving of the cam member and clamps or releases the shielding member 10. In this way, the cam member converts the rotational movement of the large shaft 303 into the lifting movement of the locking member 54 to hold or release the shutter 10, thereby locking or releasing the shutter 10. Optionally, a catch is provided on the shield 10 to allow the locking member 54 to be inserted into or removed from the catch to lock or unlock the shield 10.

The utility model provides an in the embodiment, still provide an aerify cabinet, including circuit breaker 300, three station isolator 500 and above-mentioned mechanical interlock 100, mechanical interlock 100 locates between circuit breaker 300 and three station isolator 500, and has first state and second state to avoid circuit breaker 300 and three station isolator 500 to open simultaneously. Moreover, the mechanical interlocking device 100 has a simple structure, stable performance and convenient operation.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a mechanical interlock device, locates between circuit breaker and the three station isolator, its characterized in that, mechanical interlock device has first state and second state, and includes:

the shielding piece is movably arranged along a first direction of a grounding hole in the three-station isolating switch and an isolating part Kong Lianxian;

the linkage assembly is in linkage connection with the shielding piece;

when the circuit breaker is in the first state, the shielding piece moves to shield the isolating hole and the grounding hole along the first direction, and the linkage assembly allows a closing switch on the circuit breaker to be opened; when the linkage assembly is in the second state, the shielding piece moves to open any one of the isolation hole and the grounding hole along the first direction, and the linkage assembly blocks the switching-on switch to be switched on under the driving of the shielding piece.

2. The mechanical interlock device according to claim 1, wherein the shutter includes a main body, a first shutter portion and a second shutter portion, the first shutter portion and the second shutter portion being disposed on the main body at an interval along the first direction;

3. The mechanical interlock of claim 2 wherein said linkage assembly includes a gate wire and a flapper, said flapper being movably disposed on said circuit breaker, said gate wire being connected between said flapper and said body;

when the switch is in the first state, the brake cable is in a natural state, and the baffle and the closing path of the closing switch are staggered; and in the second state, the brake cable is pulled by the moved main body and drives the baffle to move to be blocked on the opening path of the closing switch.

4. A mechanical interlock device according to claim 3, wherein said blocking plate is rotatably mounted to said circuit breaker and has a first end and a second end on either side of its point of rotatable connection to said circuit breaker;

5. The mechanical interlock device according to claim 4, wherein the first end is connected to the brake cable, and in the first state, the second end is disposed to be inclined toward a side where the shutter is located, and the closing switch is located at a side of the second end facing away from the shutter.

6. The mechanical interlock of claim 3, wherein the linkage assembly further comprises an elastic reset member, the elastic reset member is elastically abutted against the blocking plate and stores elastic potential energy for driving the blocking plate to reset to be misaligned with an opening path of the closing switch when the blocking plate rotates.

7. A mechanical interlock device according to claim 2 further comprising a locking assembly for locking the shutter when the mechanical interlock device is in the first state and for unlocking the shutter when the mechanical interlock device is in the second state.

8. The mechanical interlock of claim 7, wherein the locking assembly comprises a transmission member and a locking member, the transmission member is disposed on a large shaft of the circuit breaker, the locking member is rotatably connected to the transmission member, and the transmission member drives the locking member to lock or unlock the shielding member under the driving of the large shaft.

9. The mechanical interlocking device according to claim 8, wherein the transmission member is a cam member sleeved on the large shaft, and the locking member moves closer to and away from the shielding member under the driving of the cam member and clamps or releases the shielding member.

10. An inflatable cabinet comprising a circuit breaker, a three-position disconnector and a mechanical interlock as claimed in any one of claims 1 to 9, said mechanical interlock being disposed between said circuit breaker and said three-position disconnector and having said first state and said second state.