CN219800694U - Mechanical interlocking device, isolating switch, grounding switch and three-station switch - Google Patents
Mechanical interlocking device, isolating switch, grounding switch and three-station switch Download PDFInfo
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- CN219800694U CN219800694U CN202320351576.7U CN202320351576U CN219800694U CN 219800694 U CN219800694 U CN 219800694U CN 202320351576 U CN202320351576 U CN 202320351576U CN 219800694 U CN219800694 U CN 219800694U
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- rotating shaft
- interlocking device
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Abstract
The utility model provides a mechanical interlocking device, an isolating switch, a grounding switch and a three-station switch, wherein the mechanical interlocking device comprises: the rotating shaft is rotatably arranged at one side of a switch operation hole of the isolating switch or the grounding switch or the three-station switch; the baffle is sleeved on the rotating shaft to rotate along with the rotating shaft so as to open or close the switch operation hole; and the power input end of the connecting rod assembly is connected with the main shaft of the circuit breaker, and the power output end of the connecting rod assembly is connected with the rotating shaft so as to drive the rotating shaft to rotate. The air/gas insulated switchgear solves the problem that part of functions in the air/gas insulated switchgear in the prior art have a large failure risk because the functions can be realized only by means of electrical interlocking.
Description
Technical Field
The utility model relates to the technical field of air/gas insulated switchgear, in particular to a mechanical interlocking device, an isolating switch, a grounding switch and a three-station switch.
Background
The circuit breaker is the most important component in the air/gas insulated switchgear, and it can reliably cut off the short-circuit current when the power system fails, in addition to switching on and off the load (rated) current of the electrical equipment in normal operation.
The main purpose of the isolating switch is to isolate the circuit to be overhauled from the running (electrified) part in the form of a visible physical fracture so as to ensure the safe operation of electric overhauling, and an arc extinguishing device is not arranged in the isolating switch generally, so that the isolating switch has no capability of cutting off short-circuit current.
The grounding switch has the main function of grounding equipment when high-voltage equipment or lines are overhauled, ensuring the safety of overhaulers, and the grounding switch needs to close short-circuit current, so that the grounding switch has certain short-circuit closing capability and dynamic and thermal stability, but does not need to break load current and short-circuit current, and does not have an arc extinguishing device.
The grounding switch and the isolating switch can be combined into a three-position switch, and as the grounding switch and the isolating switch have no capability of opening and closing short-circuit current, the interlocking of the circuit breaker and the isolating, grounding or three-position switch in the five-prevention interlocking of high-voltage equipment is definitely specified as follows:
(1) The on-load separation switch is prevented;
(2) Preventing the electrification from closing the grounding switch;
(3) Preventing the belt ground wire from engaging the circuit breaker.
In order to prevent misoperation, besides the operation strictly according to the formulated operation rules, perfect interlocking should be arranged between the breaker and the isolating, grounding or three-station switch, but the mechanical interlocking in the current air/gas insulated switchgear is not perfect, and some interlocking can only be realized by electric interlocking, so that a large failure risk exists.
Disclosure of Invention
The utility model mainly aims to provide a mechanical interlocking device, an isolating switch, a grounding switch and a three-station switch, so as to solve the problem that part of functions in air/gas insulated switchgear in the prior art can be realized only by means of electrical interlocking, and the risk of failure is high.
To achieve the above object, according to a first aspect of the present utility model, there is provided a mechanical interlock comprising: the rotating shaft is rotatably arranged at one side of a switch operation hole of the isolating switch or the grounding switch or the three-station switch; the baffle is sleeved on the rotating shaft to rotate along with the rotating shaft so as to open or close the switch operation hole; and the power input end of the connecting rod assembly is connected with the main shaft of the circuit breaker, and the power output end of the connecting rod assembly is connected with the rotating shaft so as to drive the rotating shaft to rotate.
Further, the connecting rod assembly comprises a first crank arm, a connecting rod and a second crank arm, two ends of the connecting rod are respectively hinged with the first crank arm and the second crank arm, one end, far away from the connecting rod, of the first crank arm is fixedly connected with the main shaft of the circuit breaker, and one end, far away from the connecting rod, of the second crank arm is fixedly connected with the rotating shaft.
Further, the mechanical interlocking device comprises a fixing frame arranged at one side of a switch operation hole of the isolating switch or the grounding switch or the three-position switch, and the rotating shaft is rotatably arranged on the fixing frame.
Further, the fixing frame is fixed on the shell of the circuit breaker through a fastener.
Further, the mount includes first plate body and a plurality of second plate bodies that are parallel to each other and set up along the length direction interval of first plate body, and each second plate body all is perpendicular to first plate body, all is provided with the rotation of being used for supplying the axis of rotation to pass on each second plate body and dodges the hole.
Further, a rotating bearing is arranged between the rotating shaft and each second plate body.
Further, the number of the second plate bodies is two.
According to a second aspect of the present utility model, there is provided a disconnector comprising the mechanical interlock device described above, the disconnector further comprising a switch operating hole for insertion of an operating rod, a power input of the mechanical interlock device being connected to a main shaft of the circuit breaker, and a power output of the link assembly being adapted to open or close the switch operating hole.
According to a third aspect of the present utility model, there is provided a grounding switch comprising the mechanical interlocking device described above, the grounding switch further comprising a switch operation hole for insertion of an operation lever, a power input end of the mechanical interlocking device being connected to a main shaft of the circuit breaker, and a power output end of the link assembly being used for opening or closing the switch operation hole.
According to a fourth aspect of the present utility model, there is provided a three-position switch comprising the mechanical interlock device described above, the three-position switch further comprising a switch operation hole for insertion of an operation lever, a power input end of the mechanical interlock device being connected to a main shaft of the circuit breaker, and a power output end of the link assembly being used for opening or closing the switch operation hole.
By applying the technical scheme of the utility model, the utility model provides a mechanical interlocking device, which comprises the following components: the rotating shaft is rotatably arranged at one side of a switch operation hole of the isolating switch or the grounding switch or the three-station switch; the baffle is sleeved on the rotating shaft to rotate along with the rotating shaft so as to open or close the switch operation hole; and the power input end of the connecting rod assembly is connected with the main shaft of the circuit breaker, and the power output end of the connecting rod assembly is connected with the rotating shaft so as to drive the rotating shaft to rotate. Therefore, the utility model provides the mechanical interlocking device for realizing the opening and closing of the switch operation hole of the isolating switch or the grounding switch or the three-station switch along with the switching-on and switching-off positions of the circuit breaker, and the mechanical interlocking device is not needed to be carried out by external force; when the breaker is at a breaking (non-electrified) position, the switch operation hole is in an open state, and an operator can insert an operation rod to operate the isolating switch or the grounding switch or the three-station switch; when the breaker is at a closing (electrified) position, the switch operation hole is in a closing state, an operator cannot insert an operation rod at the moment and cannot operate the isolating switch or the grounding switch or the three-station switch, and the problem that part of functions in air/gas insulated switchgear in the prior art have larger failure risks because the functions can be realized only by means of electric interlocking is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
fig. 1 shows a schematic view of the position of an embodiment of a mechanical interlock according to the utility model when the circuit breaker is in the open state;
fig. 2 shows a schematic view of the position of an embodiment of the mechanical interlock according to the utility model when the circuit breaker is in the closed state.
Wherein the above figures include the following reference numerals:
1. a breaker spindle; 2. a first lever; 3. a connecting rod; 4. a second crank arm; 5. a rotating shaft; 6. a baffle; 7. a fixing frame; 71. a first plate body; 72. a second plate body; 8. and a switch operation hole.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1 and 2, the present utility model provides a mechanical interlock, comprising: the rotating shaft 5 is rotatably arranged at one side of a switch operation hole 8 of the isolating switch or the grounding switch or the three-station switch; a baffle 6, wherein the baffle 6 is sleeved on the rotating shaft 5 to rotate along with the rotating shaft 5 so as to open or close the switch operation hole 8; and the power input end of the connecting rod assembly is connected with the main shaft 1 of the circuit breaker, and the power output end of the connecting rod assembly is connected with the rotating shaft 5 to drive the rotating shaft 5 to rotate.
In this way, the utility model provides a mechanical interlocking device to realize that the switch operation hole 8 of the isolating switch or the grounding switch or the three-station switch is opened and closed along with the switching-on and switching-off positions of the circuit breaker, and the opening and the closing of the circuit breaker do not need to be carried out by external force; when the breaker is at the disconnecting (non-charging) position, the switch operation hole 8 is in an open state, and an operator can insert an operation rod to operate the disconnecting switch or the grounding switch or the three-station switch; when the breaker is in a closing (electrified) position, the switch operation hole 8 is in a closed state, an operator cannot insert an operation rod at the moment and cannot operate the isolating switch or the grounding switch or the three-station switch, and the problem that part of functions in air/gas insulated switchgear in the prior art have larger failure risks because the functions can be realized only by means of electric interlocking is solved.
As shown in fig. 1 and 2, the connecting rod assembly comprises a first crank arm 2, a connecting rod 3 and a second crank arm 4, two ends of the connecting rod 3 are respectively hinged with the first crank arm 2 and the second crank arm 4, one end, far away from the connecting rod 3, of the first crank arm 2 is fixedly connected with the main shaft 1 of the circuit breaker, and one end, far away from the connecting rod 3, of the second crank arm 4 is fixedly connected with the rotating shaft 5.
As shown in fig. 1 and 2, the mechanical interlock includes a fixing frame 7 provided at one side of a switch operation hole 8 of a disconnecting switch or a grounding switch or a three-position switch, and a rotation shaft 5 is rotatably installed on the fixing frame 7.
As shown in fig. 1 and 2, the fixing frame 7 is fixed to the casing of the circuit breaker by a fastener.
As shown in fig. 1 and 2, the fixing frame 7 includes a first plate 71 and a plurality of second plates 72 parallel to each other and disposed at intervals along a length direction of the first plate 71, each second plate 72 is perpendicular to the first plate 71, and a rotation avoidance hole for passing through the rotation shaft 5 is disposed on each second plate 72.
Preferably, a rotation bearing is interposed between the rotation shaft 5 and each of the second plates 72.
Specifically, the number of the second plate bodies 72 is two.
The utility model provides a disconnecting switch, which comprises the mechanical interlocking device, and further comprises a switch operation hole 8 for inserting an operation rod, wherein the power input end of the mechanical interlocking device is connected with a main shaft 1 of a circuit breaker, and the power output end of a connecting rod assembly is used for opening or closing the switch operation hole 8.
The utility model provides a grounding switch, which comprises the mechanical interlocking device, and further comprises a switch operation hole 8 for inserting an operation rod, wherein the power input end of the mechanical interlocking device is connected with a main shaft 1 of a circuit breaker, and the power output end of a connecting rod assembly is used for opening or closing the switch operation hole 8.
The utility model also provides a three-position switch, which comprises the mechanical interlocking device, and further comprises a switch operation hole 8 for inserting an operation rod, wherein the power input end of the mechanical interlocking device is connected with the main shaft 1 of the circuit breaker, and the power output end of the connecting rod assembly is used for opening or closing the switch operation hole 8.
It should be noted that an alarm tag should be attached around the switch operation hole 8 to prevent the operator from cutting due to the wrong insertion of the finger into the switch operation hole 8.
The working process of the mechanical interlocking device is as follows:
(1) When the breaker is switched on, the breaker main shaft 1 rotates clockwise by a certain angle along the axis line of the breaker main shaft 1, meanwhile, the first crank arm 2 synchronously rotates along with the breaker main shaft 1 to drive the connecting rod 3 to move upwards, the connecting rod 3 pulls the second crank arm 4 to rotate anticlockwise by a certain angle, the second crank arm 4 drives the rotating shaft 5 to rotate anticlockwise by the same angle again, and the rotating shaft 5 finally drives the baffle 6 to rotate anticlockwise, so that the switch operation hole 8 of the isolating switch or the grounding switch or the three-station switch is closed, at the moment, the main loop is electrified (loaded), and an operator cannot insert an operation rod, namely, cannot operate the isolating switch or the grounding switch or the three-station switch.
(2) Similarly, when the breaker is operated to open, the breaker main shaft 1 rotates anticlockwise by a certain angle along the axis line of the breaker main shaft 1, meanwhile, the first crank arm 2 synchronously rotates along with the breaker main shaft 1 to drive the connecting rod 3 to move downwards, the connecting rod 3 pulls the second crank arm 4 to rotate clockwise by a certain angle, the second crank arm 4 drives the rotating shaft 5 to rotate clockwise by the same angle again, and finally the rotating shaft 5 drives the baffle 6 to rotate clockwise, so that the switch operation hole 8 of the isolating switch or the grounding switch or the three-station switch is opened, at the moment, the main circuit is not electrified (loaded), and an operator can insert an operation rod to operate the isolating switch or the grounding switch or the three-station switch.
From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:
the utility model provides a mechanical interlocking device, comprising: the rotating shaft 5 is rotatably arranged at one side of a switch operation hole 8 of the isolating switch or the grounding switch or the three-station switch; a baffle 6, wherein the baffle 6 is sleeved on the rotating shaft 5 to rotate along with the rotating shaft 5 so as to open or close the switch operation hole 8; and the power input end of the connecting rod assembly is connected with the main shaft 1 of the circuit breaker, and the power output end of the connecting rod assembly is connected with the rotating shaft 5 to drive the rotating shaft 5 to rotate. In this way, the utility model provides a mechanical interlocking device to realize that the switch operation hole 8 of the isolating switch or the grounding switch or the three-station switch is opened and closed along with the switching-on and switching-off positions of the circuit breaker, and the opening and the closing of the circuit breaker do not need to be carried out by external force; when the breaker is at the disconnecting (non-charging) position, the switch operation hole 8 is in an open state, and an operator can insert an operation rod to operate the disconnecting switch or the grounding switch or the three-station switch; when the breaker is in a closing (electrified) position, the switch operation hole 8 is in a closed state, an operator cannot insert an operation rod at the moment and cannot operate the isolating switch or the grounding switch or the three-station switch, and the problem that part of functions in air/gas insulated switchgear in the prior art have larger failure risks because the functions can be realized only by means of electric interlocking is solved.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above …," "above …," "upper surface at …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above …" may include both orientations of "above …" and "below …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. A mechanical interlock, comprising:
the rotating shaft (5) is rotatably arranged at one side of a switch operation hole (8) of the isolating switch or the grounding switch or the three-station switch;
the baffle plate (6) is sleeved on the rotating shaft (5) to rotate along with the rotating shaft (5) so as to open or close the switch operation hole (8);
and the power input end of the connecting rod assembly is connected with the main shaft (1) of the circuit breaker, and the power output end of the connecting rod assembly is connected with the rotating shaft (5) so as to drive the rotating shaft (5) to rotate.
2. The mechanical interlocking device according to claim 1, wherein the connecting rod assembly comprises a first crank arm (2), a connecting rod (3) and a second crank arm (4), two ends of the connecting rod (3) are respectively hinged with the first crank arm (2) and the second crank arm (4), one end, far away from the connecting rod (3), of the first crank arm (2) is fixedly connected with the main shaft (1) of the circuit breaker, and one end, far away from the connecting rod (3), of the second crank arm (4) is fixedly connected with the rotating shaft (5).
3. A mechanical interlock according to claim 1, characterized in that it comprises a fixed frame (7) provided on one side of a switch operation hole (8) of a disconnecting switch or a grounding switch or a three-position switch, said rotary shaft (5) being rotatably mounted on said fixed frame (7).
4. A mechanical interlock according to claim 3, characterized in that the fixing bracket (7) is fixed to the casing of the circuit breaker by means of a fastener.
5. A mechanical interlocking device according to claim 3, wherein the fixing frame (7) comprises a first plate body (71) and a plurality of second plate bodies (72) which are parallel to each other and are arranged at intervals along the length direction of the first plate body (71), each second plate body (72) is perpendicular to the first plate body (71), and each second plate body (72) is provided with a rotation avoidance hole for the rotation shaft (5) to pass through.
6. The mechanical interlocking device according to claim 5, characterized in that a rolling bearing is interposed between the rolling shaft (5) and each of the second plates (72).
7. The mechanical interlock according to claim 5, wherein said second plate (72) is two in number.
8. A disconnector comprising a mechanical interlock according to any of claims 1 to 7, said disconnector further comprising a switch operating hole (8) for insertion of an operating rod, a power input of said mechanical interlock being connected to a main shaft (1) of the circuit breaker, a power output of said link assembly being arranged to open or close said switch operating hole (8).
9. A grounding switch, characterized by comprising the mechanical interlocking device according to any one of claims 1 to 7, further comprising a switch operation hole (8) for inserting an operation lever, a power input end of the mechanical interlocking device is connected with a main shaft (1) of a circuit breaker, and a power output end of the connecting rod assembly is used for opening or closing the switch operation hole (8).
10. A three-position switch, characterized by comprising the mechanical interlocking device according to any one of claims 1 to 7, further comprising a switch operation hole (8) for inserting an operation rod, wherein a power input end of the mechanical interlocking device is connected with a main shaft (1) of the circuit breaker, and a power output end of the connecting rod assembly is used for opening or closing the switch operation hole (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320351576.7U CN219800694U (en) | 2023-02-27 | 2023-02-27 | Mechanical interlocking device, isolating switch, grounding switch and three-station switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320351576.7U CN219800694U (en) | 2023-02-27 | 2023-02-27 | Mechanical interlocking device, isolating switch, grounding switch and three-station switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219800694U true CN219800694U (en) | 2023-10-03 |
Family
ID=88154645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320351576.7U Active CN219800694U (en) | 2023-02-27 | 2023-02-27 | Mechanical interlocking device, isolating switch, grounding switch and three-station switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219800694U (en) |
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2023
- 2023-02-27 CN CN202320351576.7U patent/CN219800694U/en active Active
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