CN115241019A - Emergency opening device and method for circuit breaker and switch cabinet - Google Patents
Emergency opening device and method for circuit breaker and switch cabinet Download PDFInfo
- Publication number
- CN115241019A CN115241019A CN202211163461.1A CN202211163461A CN115241019A CN 115241019 A CN115241019 A CN 115241019A CN 202211163461 A CN202211163461 A CN 202211163461A CN 115241019 A CN115241019 A CN 115241019A
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- Prior art keywords
- cylinder
- emergency
- circuit breaker
- operation knob
- chute
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/015—Boards, panels, desks; Parts thereof or accessories therefor
- H02B1/04—Mounting thereon of switches or of other devices in general, the switch or device having, or being without, casing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
- H02B1/32—Mounting of devices therein
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Trip Switchboards (AREA)
- Breakers (AREA)
Abstract
The invention discloses an emergency opening device and method for a circuit breaker and a switch cabinet, and relates to the technical field of electrical equipment. When the emergency situation that the opening failure does not occur to the circuit breaker, the pulling force from the extension spring is resisted through the matching of the flat groove of the positioning barrel and the central shaft cylinder, when the emergency situation that the opening failure occurs to the circuit breaker, the cylinder of the central shaft slides to the chute of the positioning barrel through the rotation of the positioning barrel, the cylinder abuts against the inclined plane of the chute, the pulling force from the extension spring cannot be resisted, the extension spring pulls the cylinder to move to the right, the cylinder moves to the right to push the inclined plane of the chute, the positioning barrel is stressed, and the positioning barrel is enabled to rotate until the cylinder slides to the bottom of the right side of the chute. The emergency operation knob is assisted to rotate to the limit position in this way, an operator can realize emergency brake opening without rotating the emergency operation knob to the limit position, the requirement on the operator is greatly reduced, and the timeliness of emergency handling is improved.
Description
Technical Field
The invention relates to the technical field of electrical equipment, in particular to an emergency opening device of a circuit breaker.
Background
The switch cabinet is one of electrical equipment, and is used for opening, closing, controlling and protecting the electrical equipment in the power generation, transmission, distribution and electric energy conversion processes in a power system. The circuit breaker is used as a part in a switch cabinet, and the reliability of the opening action of the circuit breaker is an important guarantee for ensuring the safe work of a power system.
Present circuit breaker all has remote control divide-shut brake function, realizes the divide-shut brake automatically, but this kind of circuit breaker excessively relies on electrical control, along with divide-shut brake number of times increases and some external factor interference, the coil of separating brake motor often can break down, lead to unable automatic divide-shut brake, the circuit breaker often is electrified this moment, the cabinet door that can not open the cubical switchboard goes to operate the circuit breaker, only can press the urgent separating brake device on the cabinet door, just can overhaul or change the circuit breaker after removing charged state.
The prior emergency opening device, such as chinese patent CN203242531U, discloses an emergency opening device for a switch cabinet, which specifically discloses that an emergency operation button on a cabinet door is pressed, and an opening and closing button on a circuit breaker is pressed through a transmission rod, so as to realize emergency opening operation.
The existing brake separating device is of a manual mechanical structure, and in consideration of the fact that the size of a brake separating and closing button (the diameter is about 25 mm) and the size of a transmission rod on a circuit breaker are small (the diameter is smaller than 25mm and materials need to be insulated), the existing scheme is that the limit position of the pressed emergency operation button is used as the emergency brake separating and closing condition for starting the circuit breaker, otherwise, the transmission rod is easy to deform after the emergency operation button is pressed to the limit position. However, the existing scheme has the following defects:
according to the feedback of the user, when the emergency operation button is pressed, because the emergency operation button is not familiar and psychological factors, some operators often cannot or forget to press the emergency operation button to the bottom (limit position), so that the transmission rod cannot press the opening and closing button to a proper position, the emergency opening operation is realized, and the emergency situation is not facilitated to be processed.
Therefore, there is a need for an improved manual mechanical type opening device.
Disclosure of Invention
One of the objectives of the present invention is to solve the problem that some operators in the prior art are not familiar with the emergency operation button and do not forget to press the emergency operation button to the bottom (limit position) due to psychological factors, which is not conducive to emergency handling.
The second purpose of the invention is to provide an emergency opening method of the circuit breaker.
The invention also aims to provide a switch cabinet.
In order to achieve one of the purposes, the invention adopts the following technical scheme: the utility model provides an urgent separating brake device of circuit breaker, is in including set casing and setting urgent operation knob in the set casing, the set casing is installed on the cabinet door of cubical switchboard, the set casing links to each other with attached shell, be equipped with a location section of thick bamboo in the installation cavity of attached shell, urgent operation knob pass through the connecting rod with a location section of thick bamboo fixed connection.
The outer surface of the positioning cylinder is provided with a flat groove and a chute, the flat groove is communicated with the chute to form a cavity in the positioning cylinder, a central shaft penetrates into the cavity in the positioning cylinder to form telescopic connection, the outer surface of the central shaft is connected with a cylinder, the cylinder penetrates into the flat groove, an extension spring is arranged between the central shaft and the installation cavity, and the tension force from the extension spring is resisted (meaning that the extension spring is in a force storage state) through the blocking of the flat groove on the cylinder.
The right side of the auxiliary shell is provided with a through hole communicated with the mounting cavity, the transmission rod penetrates through the through hole and is connected with the central shaft, the right side of the transmission rod is connected with an insulating rod, the insulating rod is over against a switching-on/off button on the circuit breaker, and a gap is reserved between the insulating rod and the switching-on/off button.
In the technical scheme, in the use process of the embodiment of the invention, when the breaker has an emergency condition of brake-off failure, the emergency operation knob is rotated to drive the positioning cylinder to rotate, so that the cylinder on the central shaft slides from the flat groove to the chute, at the moment, the extension spring pulls the central shaft to move right, and meanwhile, the positioning cylinder is pushed to rotate by the cylinder sliding along the chute until the cylinder slides to the bottom of the right side of the chute, so that the emergency operation knob is assisted to rotate to the limit position.
The central shaft moves to the right to drive the transmission rod and the insulating rod to move to the right, so that the insulating rod presses a switching-on/off button on the circuit breaker to realize emergency switching-off operation.
After the circuit breaker separating brake is accomplished, rotate emergency operation knob and reset, drive the rotatory reset of a location section of thick bamboo, the chute extrusion through a location section of thick bamboo drives the cylinder and moves to the left and resets, until the cylinder from the chute cunning to the plain groove in, finally make center pin and insulating rod reset, extension spring is held power by the extension this moment, blocks through the plain groove to the cylinder, resists the pulling force that comes from extension spring to use during emergency next time.
The invention has the beneficial effects that: when the emergency situation that the breaker is not in the opening failure occurs, the pull force from the extension spring is resisted through the matching of the flat groove of the positioning cylinder and the central shaft cylinder, and when the emergency situation that the breaker is in the opening failure occurs, the cylinder of the central shaft is enabled to slide into the chute of the positioning cylinder through the rotation of the positioning cylinder, at the moment, the cylinder is abutted against the inclined plane of the chute, the pull force from the extension spring cannot be resisted, the cylinder is enabled to pull the cylinder to move rightwards, the cylinder moves rightwards to push the inclined plane of the chute, and pressure is applied to the positioning cylinder to enable the positioning cylinder to rotate until the cylinder slides to the bottom of the right side of the chute. The emergency operation knob is assisted to rotate to the limit position in this way, an operator can realize emergency brake-separating operation without rotating the emergency operation knob to the limit position, the requirement on the operator is greatly reduced, and the method is favorable for improving the timeliness of emergency treatment.
In addition, when the positioning cylinder is rotated to reset (rotate reversely), the cylinder body can be pushed to reset by extruding the inclined groove to the central shaft cylinder body, so that the cylinder body enters the flat groove again, and meanwhile, the central shaft pulls the extension spring to store force again, so that the positioning cylinder can be used in the next emergency, and the aim of recycling is fulfilled.
Further, in the embodiment of the present invention, the flat groove and the inclined groove have the same groove width, and the diameter of the column is not larger than the groove widths of the flat groove and the inclined groove.
Further, in the embodiment of the present invention, the positioning cylinder and the central shaft are cylindrical structures.
Further, in the embodiment of the present invention, the emergency operation knob penetrates into the fixed case, and the emergency operation knob is rotated with respect to the fixed case by rotating the emergency operation knob.
Further, in the embodiment of the present invention, the insulating rod is connected to the transmission rod by means of embedding.
Further, in the embodiment of the present invention, a positioning slider is disposed on the transmission rod, a sliding groove is disposed in the through hole, and the positioning slider is slidably connected to the sliding groove. Through the structure, when the positioning cylinder rotates, the central shaft cannot rotate, and after the central shaft is pulled by the extension spring, the positioning slide block can slide along the sliding groove of the through hole, so that the transmission rod is not influenced to drive the insulating rod to move.
Further, in the embodiment of the present invention, a limit knob is disposed between the fixed shell and the emergency operation knob, a right end of the limit knob extends into a rotation groove of the fixed shell, and a limit groove is disposed on a right side of the rotation groove.
The emergency operation knob is characterized in that a telescopic cavity is arranged in the limiting knob, the emergency operation knob extends into the telescopic cavity, an inner tooth socket is arranged in the telescopic cavity, and outer teeth fixed on the outer surface of the emergency operation knob are meshed with the inner tooth socket.
The outer surface of the limiting knob is provided with limiting teeth, and the limiting teeth are embedded into the limiting grooves.
In order to avoid the error rotation of the emergency operation knob, a limit knob is arranged between the fixed shell and the emergency operation knob.
Before rotating emergency operation knob, outside pulling limit knob, the outer tooth on the emergency operation knob can slide along the interior tooth's socket of limit knob, and spacing tooth on the limit knob can break away from the spacing groove on rotating groove right side in the set casing simultaneously, and after spacing tooth entered into the rotating groove, the spacing groove can't prevent that spacing tooth is rotatory under limit knob's drive, that is to say that at this moment limit knob is rotatable. Therefore, the emergency operation knob can be driven to rotate by rotating the limit knob at the moment.
The scheme has the advantages that the related structures are few and simple, when the emergency operation knob is not used, the emergency operation knob can be prevented from rotating by limiting the limiting teeth of the limiting groove limiting knob, and the emergency operation knob is prevented from being rotated by mistake. When the emergency operation knob is used, the emergency operation knob can be driven to rotate through the limit knob only by pulling the limit knob outwards.
In order to achieve the second purpose, the invention adopts the following technical scheme: an emergency opening method of a circuit breaker is applied to the emergency opening device of the circuit breaker in one of the above objects, and comprises the following steps:
when the emergency condition that the circuit breaker breaks down appears, rotate emergency operation knob, drive the location section of thick bamboo and rotate, impel the cylinder on the center pin to slide to the chute from the straight flute, extension spring pulling center pin right side shift this moment, and the gliding cylinder of edge chute promotes the location section of thick bamboo simultaneously and rotates, until the cylinder slides to the chute right side end, supplementary emergency operation knob rotates extreme position.
The central shaft moves right to drive the transmission rod and the insulating rod to move right, so that the insulating rod presses a switching-on/off button on the circuit breaker to realize emergency switching-off operation.
Further, in the embodiment of the invention, after the circuit breaker is opened, the emergency operation knob is rotated to reset, the positioning cylinder is driven to rotate to reset, the cylinder is driven to move leftwards to reset by being extruded by the chute of the positioning cylinder until the cylinder slides to the flat groove from the chute, and finally the central shaft and the insulating rod are reset, at the moment, the tension spring is stretched to accumulate force, and the tension force from the tension spring is resisted by the blocking of the flat groove on the cylinder, so that the circuit breaker can be used in the next emergency.
In order to achieve the third purpose, the invention adopts the following technical scheme: a switch cabinet is provided with a disconnecting switch, a load switch, a mutual inductor and the emergency opening device of the circuit breaker in one of the invention objects.
Drawings
Fig. 1 is a schematic structural diagram of an emergency opening device of a circuit breaker according to an embodiment of the invention.
Fig. 2 is a schematic structural diagram of a solid housing and an emergency operation knob according to an embodiment of the present invention.
FIG. 3 is a schematic view of the positioning cylinder and the central shaft according to the embodiment of the present invention.
Fig. 4 is a schematic structural diagram of another emergency opening device of a circuit breaker according to an embodiment of the invention.
Fig. 5 is a schematic structural diagram of the fixing shell, the emergency operation knob and the limit knob according to the embodiment of the invention.
Fig. 6 is a schematic structural diagram of a fixing housing according to an embodiment of the invention.
Fig. 7 is a schematic view of a fitting structure of the fixing shell and the limit knob according to the embodiment of the present invention.
In the attached drawings
1. A cabinet door 2, a circuit breaker 3 and a switch-on/off button;
10. the device comprises a fixed shell 11, an auxiliary shell 12, an installation cavity 13, a through hole 14, a rotating groove 15 and a limiting groove;
20. an emergency operation knob 21, a positioning barrel 211, a flat groove 212, a chute 22, a central shaft 221, a column 23, a transmission rod 231, a positioning slider 24, an extension spring 25, an insulating rod 26 and external teeth;
30. the limiting knob 31, the telescopic cavity 32, the inner tooth groove 33 and the limiting teeth.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clear and fully described, embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of some embodiments of the invention and are not limiting of the invention, and that all other embodiments obtained by those of ordinary skill in the art without the exercise of inventive faculty are within the scope of the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "a," "an," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
For the purposes of simplicity and explanation, the principles of the embodiments are described by referring mainly to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. But it is obvious. To one of ordinary skill in the art, the embodiments may be practiced without limitation to these specific details. In some instances, well-known circuit breaker emergency opening methods and structures have not been described in detail to avoid unnecessarily obscuring the embodiments. In addition, all embodiments may be used in combination with each other.
The first embodiment is as follows:
it should be noted that the drawings in the specification are for the content of the specification, and the structural shape, connection relationship, fitting relationship, and positional relationship that the specification can obtain without any doubt should be understood as the content of the specification.
An emergency opening device of a circuit breaker is shown in figures 1 and 2 and comprises a fixed shell 10 and an emergency operation knob 20 arranged in the fixed shell 10, wherein the fixed shell 10 is installed on a cabinet door 1 of a switch cabinet, the fixed shell 10 is connected with an auxiliary shell 11, a positioning cylinder 21 is arranged in an installation cavity 12 of the auxiliary shell 11, and the emergency operation knob 20 is fixedly connected with the positioning cylinder 21 through a connecting rod.
As shown in fig. 2 and 3, the outer surface of the positioning cylinder 21 is provided with a flat groove 211 and a chute groove 212, the flat groove 211 is communicated with the chute groove 212, the flat groove 211 is communicated with a chamber in the positioning cylinder 21 with the chute groove 212, the central shaft 22 penetrates into the chamber in the positioning cylinder 21 to form a telescopic connection, the outer surface of the central shaft 22 is connected with a cylinder 221, the cylinder 221 penetrates into the flat groove 211, the extension spring 24 is arranged between the central shaft 22 and the installation cavity 12, and referring to fig. 2, the cylinder 221 is blocked by the flat groove 211 to resist the pulling force from the extension spring 24 (meaning that the extension spring 24 is in an accumulation state).
The right side of the auxiliary shell 11 is provided with a through hole 13 communicated with the mounting cavity 12, the transmission rod 23 penetrates through the through hole 13 to be connected with the central shaft 22, the right side of the transmission rod 23 is connected with an insulating rod 25, the insulating rod 25 is over against the opening and closing button 3 on the circuit breaker 2, and a gap is reserved between the insulating rod 25 and the opening and closing button 3.
The implementation steps are as follows: when the emergency condition that the circuit breaker 2 is in a brake-separating failure occurs, the emergency operation knob 20 is rotated to drive the positioning cylinder 21 to rotate, so that the cylinder 221 on the central shaft 22 slides into the chute 212 from the flat groove 211, at this time, the extension spring 24 pulls the central shaft 22 to move to the right, and meanwhile, the cylinder 221 sliding along the chute 212 pushes the positioning cylinder 21 to rotate until the cylinder 221 slides to the bottom of the right side of the chute 212, and the auxiliary emergency operation knob 20 rotates to a limit position (the limit position is the rotation position where the emergency operation knob 20 is located after the cylinder 221 slides to the bottom of the right side of the chute 212).
The central shaft 22 moves to the right to drive the transmission rod 23 and the insulating rod 25 to move to the right, so that the insulating rod 25 presses the opening and closing button 3 on the circuit breaker 2 to realize emergency opening operation.
After the circuit breaker 2 is opened, the emergency operation knob 20 is rotated to reset, the positioning cylinder 21 is driven to rotate to reset, the inclined groove 212 of the positioning cylinder 21 extrudes to drive the cylinder 221 to move leftwards to reset until the cylinder 221 slides into the flat groove 211 from the inclined groove 212, and finally the central shaft 22 and the insulating rod 25 reset, at the moment, the extension spring 24 is stretched to accumulate force, and the cylinder 221 is blocked by the flat groove 211 to resist the pulling force from the extension spring 24, so that the circuit breaker can be used in the next emergency.
When the emergency condition of the opening failure of the circuit breaker 2 does not occur, the pull force from the extension spring 24 is resisted through the matching of the flat groove 211 of the positioning cylinder 21 and the cylinder 221 of the central shaft 22, and when the emergency condition of the opening failure of the circuit breaker 2 occurs, the cylinder 221 of the central shaft 22 slides into the inclined groove 212 of the positioning cylinder 21 through the rotation of the positioning cylinder 21, at the moment, the cylinder 221 abuts against the inclined surface of the inclined groove 212, the pull force from the extension spring 24 cannot be resisted, the extension spring 24 pulls the cylinder 221 to move rightwards, the cylinder 221 moves rightwards to push the inclined surface of the inclined groove 212, pressure is applied to the positioning cylinder 21, and the positioning cylinder 21 is enabled to rotate until the cylinder 221 slides to the bottom of the right side of the inclined groove 212. The emergency operation knob 20 is assisted to rotate to the limit position in this way, and an operator can realize emergency brake-off operation without rotating the emergency operation knob 20 to the limit position, so that the requirement on the operator is greatly reduced, and the timeliness of emergency treatment is improved.
In addition, when the positioning cylinder 21 is reset (reversed), the inclined surface of the inclined groove 212 presses the cylinder 221 of the central shaft 22, so that the cylinder 221 can be pushed to reset, the cylinder 221 enters the flat groove 211 again, and meanwhile, the central shaft 22 pulls the extension spring 24 to accumulate force again, so that the cylinder can be used in the next emergency, and the aim of recycling is achieved.
As shown in fig. 3, the flat groove 211 has the same groove width as the inclined groove 212, and the diameter of the cylinder 221 is not greater than the groove width of the flat groove 211 and the inclined groove 212.
As shown in fig. 3, the positioning cylinder 21 and the central shaft 22 are cylindrical.
The emergency operation knob 20 is penetrated into the stationary case 10, and the emergency operation knob 20 is rotated with respect to the stationary case 10 by turning the emergency operation knob 20.
As shown in fig. 2, the insulating rod 25 is connected to the transmission rod 23 by means of embedding. Therefore, when the insulating rod 25 is replaced, the insulating rod 25 can be conveniently pulled out from the right side of the transmission rod 23, and a new insulating rod 25 is embedded into the right side of the transmission rod 23.
As shown in fig. 2, the transmission rod 23 is provided with a positioning slider 231, the through hole 13 is provided with a sliding slot, and the positioning slider 231 is slidably connected with the sliding slot. With such a structure, when the positioning cylinder 21 rotates, the central shaft 22 will not rotate, and after the central shaft 22 is pulled by the extension spring 24, the positioning slider 231 can slide along the sliding slot of the through hole 13, without affecting the movement of the transmission rod 23 driving the insulating rod 25.
As shown in fig. 4 and 5, preferably, a limit knob 30 is disposed between the fixed casing 10 and the emergency operation knob 20, a right end of the limit knob 30 extends into the rotation groove 14 of the fixed casing 10, and a limit groove 15 is disposed at a right side of the rotation groove 14.
As shown in fig. 5, 6 and 7, a telescopic cavity 31 is formed in the limit knob 30, the emergency operation knob 20 extends into the telescopic cavity 31, an internal spline 32 is formed in the telescopic cavity 31, and the external teeth 26 fixed on the outer surface of the emergency operation knob 20 are engaged with the internal spline 32.
The outer surface of the limit knob 30 is provided with limit teeth 33, and the limit teeth 33 are embedded in the limit groove 15.
To avoid the erroneous rotation of the emergency operation knob 20, a limit knob 30 is provided between the stationary case 10 and the emergency operation knob 20.
Before the emergency operation knob 20 is rotated, the limit knob 30 is pulled outwards, the external teeth 26 on the emergency operation knob 20 can slide along the internal tooth grooves 32 in the limit knob 30, meanwhile, the limit teeth 33 on the limit knob 30 can be separated from the limit grooves 15 on the right side of the rotating groove 14 in the fixed shell 10, after the limit teeth 33 enter the rotating groove 14, the limit grooves 15 cannot prevent the limit teeth 33 from rotating under the driving of the limit knob 30, that is, the limit knob 30 can rotate at this time. Therefore, turning the limit knob 30 at this time can rotate the emergency operation knob 20.
The scheme has few related structures and is simple, when the emergency operation knob 20 is not used, the limit teeth 33 of the limit knob 30 are limited through the limit grooves 15, the emergency operation knob 20 can be prevented from rotating, and the emergency operation knob 20 is prevented from being rotated by mistake. When the emergency operation knob 20 is used, the emergency operation knob 20 can be driven to rotate through the limit knob 30 only by pulling the limit knob 30 outwards.
Example two:
an emergency opening method of a circuit breaker is applied to the emergency opening device of the circuit breaker in the first embodiment, and the emergency opening method of the circuit breaker comprises the following steps:
when the emergency situation that the circuit breaker 2 is in a brake-separating failure occurs, the emergency operation knob 20 is rotated to drive the positioning cylinder 21 to rotate, so that the cylinder 221 on the central shaft 22 slides into the chute 212 from the flat groove 211, at the same time, the extension spring 24 pulls the central shaft 22 to move to the right, and meanwhile, the cylinder 221 sliding along the chute 212 pushes the positioning cylinder 21 to rotate until the cylinder 221 slides to the bottom of the right side of the chute 212, and the auxiliary emergency operation knob 20 rotates to a limit position (the limit position is the rotation position where the emergency operation knob 20 is located after the cylinder 221 slides to the bottom of the right side of the chute 212).
The central shaft 22 moves to the right to drive the transmission rod 23 and the insulating rod 25 to move to the right, so that the insulating rod 25 presses the opening and closing button 3 on the circuit breaker 2 to realize emergency opening operation.
After the circuit breaker 2 is opened, the emergency operation knob 20 is rotated to reset, the positioning cylinder 21 is driven to rotate to reset, the inclined groove 212 of the positioning cylinder 21 extrudes to drive the cylinder 221 to move leftwards to reset until the cylinder 221 slides into the flat groove 211 from the inclined groove 212, finally the central shaft 22 and the insulating rod 25 reset, the extension spring 24 is stretched to store force, the cylinder 221 is blocked by the flat groove 211 to resist the tensile force from the extension spring 24, and the circuit breaker is used in the next emergency.
When the emergency condition of the opening failure of the circuit breaker 2 does not occur, the pull force from the extension spring 24 is resisted through the matching of the flat groove 211 of the positioning cylinder 21 and the cylinder 221 of the central shaft 22, and when the emergency condition of the opening failure of the circuit breaker 2 occurs, the cylinder 221 of the central shaft 22 slides into the inclined groove 212 of the positioning cylinder 21 through the rotation of the positioning cylinder 21, at the moment, the cylinder 221 abuts against the inclined surface of the inclined groove 212, the pull force from the extension spring 24 cannot be resisted, the extension spring 24 pulls the cylinder 221 to move rightwards, the cylinder 221 moves rightwards to push the inclined surface of the inclined groove 212, pressure is applied to the positioning cylinder 21, and the positioning cylinder 21 is enabled to rotate until the cylinder 221 slides to the bottom of the right side of the inclined groove 212. The emergency operation knob 20 is assisted to rotate to the limit position in this way, and an operator can realize emergency brake-off operation without rotating the emergency operation knob 20 to the limit position, so that the requirement on the operator is greatly reduced, and the timeliness of emergency treatment is improved.
Preferred embodiments: in order to prevent the emergency operation knob 20 from being rotated by mistake, a limit knob 30 is provided between the stationary case 10 and the emergency operation knob 20.
Before the emergency operation knob 20 is rotated, the limiting knob 30 is pulled outwards, the external teeth 26 on the emergency operation knob 20 slide along the internal tooth grooves 32 in the limiting knob 30, meanwhile, the limiting teeth 33 on the limiting knob 30 can be separated from the limiting grooves 15 on the right side of the rotating groove 14 in the fixed shell 10, after the limiting teeth 33 enter the rotating groove 14, the limiting grooves 15 cannot prevent the limiting teeth 33 from rotating under the driving of the limiting knob 30, that is, the limiting knob 30 can rotate at this time. Therefore, turning the limit knob 30 at this time can rotate the emergency operation knob 20.
The scheme has few related structures and is simple, when the emergency operation knob 20 is not used, the limit teeth 33 of the limit knob 30 are limited through the limit grooves 15, the emergency operation knob 20 can be prevented from rotating, and the emergency operation knob 20 is prevented from being rotated by mistake. When the emergency operation knob 20 is used, the emergency operation knob 20 can be driven to rotate through the limit knob 30 only by pulling the limit knob 30 outwards.
Example three:
a switch cabinet is provided with an isolating switch, a load switch, a mutual inductor and the breaker emergency opening device in the first embodiment.
The isolating switch, the load switch and the mutual inductor are conventional components in the existing switch cabinet and are not described in detail.
Although the illustrative embodiments of the present invention have been described above to enable those skilled in the art to understand the present invention, the present invention is not limited to the scope of the embodiments, and it is apparent to those skilled in the art that all the inventive concepts using the present invention are protected as long as they can be changed within the spirit and scope of the present invention as defined and defined by the appended claims.
Claims (9)
1. An emergency opening device of a circuit breaker is characterized by comprising a fixed shell and an emergency operation knob arranged in the fixed shell, wherein the fixed shell is arranged on a cabinet door of a switch cabinet and is connected with an auxiliary shell, a positioning cylinder is arranged in an installation cavity of the auxiliary shell, and the emergency operation knob is fixedly connected with the positioning cylinder through a connecting rod;
a flat groove and a chute are arranged on the outer surface of the positioning cylinder, the flat groove is communicated with the chute, the flat groove is communicated with a cavity in the positioning cylinder, a central shaft penetrates into the cavity in the positioning cylinder to form telescopic connection, a cylinder is connected to the outer surface of the central shaft, the cylinder penetrates into the flat groove, an extension spring is arranged between the central shaft and the installation cavity, and the cylinder is blocked by the flat groove to resist the tension force from the extension spring;
a through hole communicated with the mounting cavity is formed in the right side of the auxiliary shell, a transmission rod penetrates through the through hole to be connected with the central shaft, an insulating rod is connected to the right side of the transmission rod, the insulating rod is opposite to a switching-on and switching-off button on the circuit breaker, and a gap is reserved between the insulating rod and the switching-on and switching-off button;
the transmission rod is provided with a positioning sliding block, a sliding groove is formed in the through hole, and the positioning sliding block is connected with the sliding groove in a sliding mode.
2. The circuit breaker emergency opening device of claim 1, wherein the flat slot and the chute have the same slot width, and the diameter of the column is not greater than the slot width of the flat slot and the chute.
3. The circuit breaker emergency opening device of claim 1, wherein the positioning cylinder and the central shaft are of a cylindrical structure.
4. The circuit breaker emergency opening device of claim 1, wherein the emergency operation knob penetrates into the stationary housing, and the emergency operation knob is rotated with respect to the stationary housing by rotating the emergency operation knob.
5. The circuit breaker emergency opening device of claim 1, wherein the insulating rod is connected to the transmission rod by means of embedding.
6. The emergency opening device of the circuit breaker according to claim 1, wherein a limit knob is arranged between the fixed shell and the emergency operation knob, the right end of the limit knob extends into a rotating groove of the fixed shell, and a limit groove is arranged on the right side of the rotating groove;
a telescopic cavity is formed in the limiting knob, the emergency operation knob extends into the telescopic cavity, an inner tooth socket is formed in the telescopic cavity, and external teeth fixed on the outer surface of the emergency operation knob are meshed with the inner tooth socket;
the outer surface of the limiting knob is provided with limiting teeth, and the limiting teeth are embedded into the limiting grooves.
7. An emergency opening method of a circuit breaker, which is applied to the emergency opening device of the circuit breaker according to any one of claims 1-6, and comprises the following steps:
when the emergency condition that the circuit breaker is in a brake-separating failure occurs, the emergency operation knob is rotated to drive the positioning barrel to rotate, the cylinder on the central shaft is promoted to slide into the chute from the flat groove, the central shaft is pulled by the extension spring to move to the right at the moment, meanwhile, the positioning barrel is pushed to rotate along the cylinder sliding on the chute until the cylinder slides to the bottom of the right side of the chute, and the auxiliary emergency operation knob is rotated to the limit position;
the central shaft moves right to drive the transmission rod and the insulating rod to move right, so that the insulating rod presses a switching-on/off button on the circuit breaker to realize emergency switching-off operation.
8. The emergency opening method of the circuit breaker according to claim 7, wherein after the opening of the circuit breaker is completed, the emergency operation knob is rotated to reset, the positioning cylinder is driven to rotate to reset, the cylinder is driven to move to the left to reset by the extrusion of the chute of the positioning cylinder until the cylinder slides from the chute to the flat groove, and finally the central shaft and the insulating rod are reset, at this time, the extension spring is stretched to accumulate force, and the cylinder is blocked by the flat groove to resist the pulling force from the extension spring, so that the extension spring can be used in the next emergency.
9. A switchgear cabinet, characterized in that the said switchgear cabinet has disconnecting switch, load switch, mutual inductor and the breaker emergency opening device of any claim 1-6 above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211163461.1A CN115241019B (en) | 2022-09-23 | 2022-09-23 | Emergency opening device and method for circuit breaker and switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211163461.1A CN115241019B (en) | 2022-09-23 | 2022-09-23 | Emergency opening device and method for circuit breaker and switch cabinet |
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| Publication Number | Publication Date |
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| CN115241019A true CN115241019A (en) | 2022-10-25 |
| CN115241019B CN115241019B (en) | 2022-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211163461.1A Active CN115241019B (en) | 2022-09-23 | 2022-09-23 | Emergency opening device and method for circuit breaker and switch cabinet |
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| CN (1) | CN115241019B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751113A (en) * | 2012-07-16 | 2012-10-24 | 远大中联控股集团有限公司 | Manually-operated emergency opening device for circuit breaker outside door of high-tension switch cabinet |
| CN204242972U (en) * | 2014-11-04 | 2015-04-01 | 成都科星电力电器有限公司 | A kind of switchgear false-touch prevention emergency brake-dividing device |
| CN216928332U (en) * | 2021-12-29 | 2022-07-08 | 江苏中科时代电气制造股份有限公司 | Emergency opening and closing device of switch cabinet |
| CN217468322U (en) * | 2022-08-22 | 2022-09-20 | 珠海盈源电气有限公司 | Emergency brake separating mechanism |
-
2022
- 2022-09-23 CN CN202211163461.1A patent/CN115241019B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751113A (en) * | 2012-07-16 | 2012-10-24 | 远大中联控股集团有限公司 | Manually-operated emergency opening device for circuit breaker outside door of high-tension switch cabinet |
| CN204242972U (en) * | 2014-11-04 | 2015-04-01 | 成都科星电力电器有限公司 | A kind of switchgear false-touch prevention emergency brake-dividing device |
| CN216928332U (en) * | 2021-12-29 | 2022-07-08 | 江苏中科时代电气制造股份有限公司 | Emergency opening and closing device of switch cabinet |
| CN217468322U (en) * | 2022-08-22 | 2022-09-20 | 珠海盈源电气有限公司 | Emergency brake separating mechanism |
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| Publication number | Publication date |
|---|---|
| CN115241019B (en) | 2022-12-20 |
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