CN114093690A - Circuit breaker cabinet operated in single-end driving mode and working method - Google Patents
Circuit breaker cabinet operated in single-end driving mode and working method Download PDFInfo
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- CN114093690A CN114093690A CN202111340209.9A CN202111340209A CN114093690A CN 114093690 A CN114093690 A CN 114093690A CN 202111340209 A CN202111340209 A CN 202111340209A CN 114093690 A CN114093690 A CN 114093690A
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- driving
- cam
- belt wheel
- circuit breaker
- driven belt
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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
- 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
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
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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
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/025—Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect
Abstract
The invention discloses a circuit breaker cabinet operated by single-end driving and a working method. When the closing operation is carried out, the disconnecting switch can be operated firstly and then the breaker can be operated; when the opening operation is carried out, the breaker can only be operated firstly, and then the isolating switch is operated, so that the complexity of the breaker cabinet operation is reduced, and the probability of misoperation is further reduced. When operating the circuit breaker, because the moment of torsion transmission between cam and the circuit breaker drive shaft is realized through the cooperation of notch two and drive round pin, and the motion of cam relies on the thrust of elasticity ejector pin to realize, just so when the rotational speed that makes the cam rises to the certain degree, just can drive the moving contact of explosion chamber, guarantees the speed and the dynamics of explosion chamber action.
Description
Technical Field
The invention relates to the technical field of circuit breaker cabinets, in particular to a circuit breaker cabinet with single-end driving operation and a working method.
Background
In order to ensure personal safety during use of high-voltage switchgear, national standards require anti-misoperation devices to be installed on the high-voltage switchgear which may cause misoperation, namely, the high-voltage switchgear has a five-prevention function, and is one of important measures for electric power safety. The five prevention is to prevent the circuit breaker from being opened and closed by mistake; the isolating switch is prevented from being switched on and off under load; preventing the live-engaging ground switch; preventing ground power transmission; prevent the wrong entering into the electrified interval. In the prior art, the five-prevention interlocking structure is various, but the disconnecting switch and the circuit breaker of the interlocking structure are respectively provided with independent operation ports, namely the disconnecting switch and the circuit breaker are respectively provided with respective operation ports, the interlocking structure usually avoids misoperation in a mode of shielding the corresponding operation ports, for example, when the load is needed to be switched off, the operation hole of the disconnecting switch is shielded, and the disconnecting switch can be operated only after the circuit breaker is operated.
Although the anti-misoperation device is simple in structure, certain potential safety hazards still exist, such as the fact that the shielding device falls, most importantly, an operator needs to operate the disconnecting switch and the circuit breaker respectively, and the complexity of operation is increased to a certain extent.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a circuit breaker cabinet operated by single-end driving and a working method thereof, and solves the technical problem that an isolating switch and a circuit breaker need to be operated respectively when the circuit breaker cabinet is switched on and switched off in the prior art.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a circuit breaker cabinet with single-end drive operation comprises a circuit breaker and an isolating switch which are arranged in series, wherein the circuit breaker comprises a circuit breaker driving shaft and an arc extinguish chamber, a driving groove is arranged at the side part of the circuit breaker driving shaft, and the driving groove is connected with an operation end of the arc extinguish chamber; the isolating switch comprises an isolating switch driving shaft and an isolating contact, and the isolating contact is driven to be switched on or switched off by the isolating switch driving shaft through a crank arm;
the isolating switch driving shaft is provided with a driven belt wheel I and a driven belt wheel II, the driven belt wheel I can freely rotate relative to the isolating switch driving shaft, the driven belt wheel II can be axially and slidably connected with the isolating switch driving shaft and synchronously rotate with the isolating switch driving shaft, and the breaker driving shaft is connected with a breaker driving wheel through a cam;
the cam can rotate and lock at certain two fixed angles with the circuit breaker drive shaft as an axis,
the side part of the cam drives the driven belt wheel I and the driven belt wheel II to be combined or separated through a linkage mechanism;
the circuit breaker driving wheel and the driven belt wheel are both driven by a main driving wheel, and the main driving wheel is provided with a driving end for connecting an external tool;
when the cam is locked at a closing angle, the arc extinguish chamber and the isolation contact are both in a conducting state, the circuit breaker driving wheel and the cam are in a combined state in a switching-off rotating direction, and the cam enables the driven belt wheel I and the driven belt wheel II to be in a disconnecting state through the linkage mechanism;
when the cam is locked at a brake-separating angle, the arc extinguish chamber and the isolation contact are both in a disconnected state, the circuit breaker driving wheel and the cam are in a disconnected state in a brake-closing rotating direction, and the cam enables the driven belt wheel I and the driven belt wheel II to be in a combined state through the linkage mechanism.
Preferably, the circuit breaker cabinet with single-end drive operation comprises: the linkage mechanism comprises a sliding piece and an elastic ejector rod, the main driving wheel is connected with a circuit breaker driving wheel through a gear, one end of the circuit breaker driving wheel is provided with a driving block I, and the cam is provided with a driving block II matched with the driving block I;
one end of the elastic ejector rod is hinged to the side part of the cam, and the cam is provided with a rotating angle limiting structure;
when the cam rotates to one end of the rotation angle limiting structure, the smaller diameter end of the cam is connected with the sliding part, and the driven belt wheel I and the driven belt wheel II are in a separated state;
when the cam rotates to the other end of the rotation angle limiting structure, the end with the larger diameter of the cam is connected with the sliding piece, and the sliding piece drives the driven belt wheel II to be combined with the driven belt wheel I;
when the cam rotates to the two ends of the rotation angle limiting structure, the driving rotation force of the elastic mandril to the cam is opposite.
Preferably, the circuit breaker cabinet with single-end drive operation comprises: the sliding part is provided with a driving inclined plane used for driving the driven belt wheel II to axially slide, the sliding part is provided with a sliding part spring used for driving the end part of the sliding part to be attached to the cam, and a driven belt wheel spring is arranged between the driven belt wheel I and the driven belt wheel II;
the opposite surfaces of the driven belt wheel I and the driven belt wheel II are respectively provided with an end surface tooth I and an end surface tooth II; when the driven belt wheel I and the driven belt wheel II are in a combined state, the driving inclined plane drives the driven belt wheel to move towards the direction of the driven belt wheel I to the end surface teeth I to be meshed with the end surface teeth II; when the driven belt wheel I and the driven belt wheel II are in a separated state, the end face teeth I are separated from the end face teeth II.
Preferably, the circuit breaker cabinet with single-end drive operation comprises: the main driving wheel comprises a main driving gear and a driving belt wheel which are fixedly connected, the main driving gear is meshed with the circuit breaker driving wheel through a gear, and the driving belt wheel drives the driven belt wheel I through a synchronous belt.
Preferably, the circuit breaker cabinet with single-end drive operation comprises: the cam is provided with a second notch, the driving shaft of the circuit breaker is connected with the second notch through the driving pin, when the cam is locked at a certain fixed angle, the driving pin is connected with one end of the second notch, and when the cam is locked at another fixed angle, the driving pin is connected with the other end of the second notch.
Preferably, the circuit breaker cabinet with single-end drive operation comprises: the rotation angle limiting structure comprises a limiting column, a first notch is formed in the side portion of the cam, when the cam is locked at a certain fixed angle, the limiting column is connected with one end of the first notch, and when the cam is locked at another fixed angle, the limiting column is connected with the other end of the first notch.
Preferably, the circuit breaker cabinet with single-end drive operation comprises: the circuit breaker driving shaft and the disconnecting switch driving shaft penetrate through the partition plate, the partition plate is connected with the sliding part through the sliding guide part, and the limiting column is connected with the partition plate.
The working method of the circuit breaker cabinet based on the single-end driving operation comprises the following steps: the method comprises the steps of switching off and switching on, wherein the step of switching off comprises the following steps:
the method comprises the following steps: the circuit breaker driving wheel is driven to rotate through the main driving wheel, and the first driving block acts on the second driving block to drive the cam to rotate towards the opening direction;
step two: after the rotation driving direction force of the elastic ejector rod to the cam is changed, the driving block II is separated from the driving block I, the cam drives the circuit breaker driving shaft to rotate to the state that the arc extinguish chamber is disconnected, and meanwhile, the cam drives the driven belt wheel II to be combined with the driven belt wheel I through the sliding part;
step three: the main driving wheel drives the isolation contact to move to a brake-off state in a disconnection direction sequentially through the driven belt wheel I and the driven belt wheel II;
the switching-on step comprises:
the method comprises the following steps: the main driving wheel drives the isolation contact to move towards the closing direction through the first driven belt wheel and the second driven belt wheel in sequence, and meanwhile, the first driving block drives the cam to rotate towards the closing direction from the other direction;
step two: when the isolation contact rotates to a closing state, the driven belt wheel I and the driven belt wheel II are separated, and the driving rotation direction of the elastic ejector rod to the cam is changed;
step three: the elastic ejector rod is communicated with the arc extinguish chamber through a cam.
The invention achieves the following beneficial effects: compared with the prior art, the invention has the following advantages: the invention can realize logic control of the circuit breaker and the isolating switch only by operating the rotation of one main driving wheel. When the closing operation is carried out, the disconnecting switch can be operated firstly and then the breaker can be operated; when the opening operation is carried out, the breaker can only be operated firstly, and then the isolating switch is operated, so that the complexity of the breaker cabinet operation is reduced, and the probability of misoperation is further reduced.
When acting the circuit breaker, because the moment of torsion transmission between cam and the circuit breaker drive shaft is realized through the cooperation of notch two and drive round pin, and the motion of cam relies on the thrust of elasticity ejector pin to realize, just so when the rotational speed that makes the cam rises to the certain degree, just can drive the moving contact of explosion chamber, guarantees the speed and the dynamics of explosion chamber action.
Drawings
FIG. 1 is a prior art circuit breaker, disconnector configuration diagram;
FIG. 2 is an isometric view of the overall construction of the present invention;
FIG. 3 is an exploded view of the present invention;
FIG. 4 is a view of the structure of the breaker drive wheel and cam of the present invention;
FIG. 5 is a closing state diagram of the present invention;
FIG. 6 is a state diagram of the opening process of the present invention;
FIG. 7 is a diagram of the two states during the opening process of the present invention;
FIG. 8 is a first state diagram illustrating the completion of the opening operation according to the present invention;
FIG. 9 is a second state diagram illustrating the completion of opening operation according to the present invention;
FIG. 10 is a state diagram of the closing process of the present invention;
FIG. 11 is a diagram of the completion of closing of the present invention;
the meaning of the reference numerals: 1-a circuit breaker; 2-an isolating switch; 3-a separator; 4-passive belt wheel one; 5-driven belt wheel II; 6-main driving wheel; 7-a breaker drive wheel; 8-cam; 9-a slide; 11-circuit breaker drive shaft; 12-a drive slot; 13-an arc extinguishing chamber; 21-a disconnector drive shaft; 22-crank arm; 23-an isolated contact; 24-a passive pulley spring; 25-a limiting column; 31-an elastic ejector rod; 32-a sliding guide; 33-a slider spring; 41-first end face tooth; 42-a synchronous belt; 51-end face teeth II; 61-main drive gear; 62-a drive end; 63-a driving pulley; 72-drive block one; 81-notch one; 82-driving block two; 83-notch two; 111-drive the pin.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1: fig. 1 is a structural diagram of a circuit breaker 1 and a disconnector 2 in the prior art, and the circuit breaker 1 and the disconnector 2 are in a series connection state. The circuit breaker 1 comprises a circuit breaker driving shaft 11, a driving groove 12 and an arc extinguish chamber 13, wherein the driving shaft 11 drives a moving contact of the arc extinguish chamber to stretch and retract through the driving groove 12 so as to realize the conduction and the separation of the arc extinguish chamber 13. The circle center of the driving slot 12 is not coaxial with the circuit breaker driving shaft 11, so that when the movable contact of the arc extinguish chamber 13 can only do telescopic motion, when the driving slot 12 rotates, the axial motion of the movable contact of the arc extinguish chamber 13 can be driven. The disconnector 2 likewise comprises a disconnector drive shaft 21, a connecting lever 22 and a disconnector contact 23. The isolating switch driving shaft 21 drives the isolating contact 23 to extend and retract through the crank arm 22.
Because the circuit breaker 1 can realize the on-load operation, and the isolating switch 2 can not carry out the on-load operation and can only be used as the isolation protection, when the on-load brake is opened, the circuit breaker 1 can only be operated firstly, and then the isolating switch 2 is operated; when the load is switched on, the disconnecting switch 2 needs to be operated first, and then the circuit breaker 1 needs to be operated.
On the basis of the prior art, the embodiment discloses a circuit breaker cabinet with single-end driving operation, wherein the first driven pulley 4 and the second driven pulley 5 are arranged on the isolating switch driving shaft 21, the first driven pulley 4 can freely rotate relative to the isolating switch driving shaft 21, and the second driven pulley 5 can be axially slidably connected to the isolating switch driving shaft 21 and synchronously rotate with the isolating switch driving shaft 21, that is, torque cannot be directly transmitted between the first driven pulley 4 and the isolating switch driving shaft 21, and the first driven pulley and the isolating switch driving shaft 21 cannot axially move. And the second driven pulley 5 is axially movable along the disconnector drive shaft 21 and is torque-transmittable (for example by means of a splined connection) with the disconnector drive shaft 21.
The breaker drive shaft 11 is connected to the breaker drive wheel 7 via the cam 8. The cam 8 can be rotated and locked at two fixed angles, which are the limit values of the two directions of rotation, with the breaker actuating shaft 11 as the axis.
The side part of the cam 8 drives the driven pulley I4 and the driven pulley II 5 to be combined or separated through a linkage mechanism, when the driven pulley I and the driven pulley II are combined, the driven pulley I and the driven pulley II can synchronously rotate and transmit torque, and when the driven pulley I and the driven pulley II are separated, the driven pulley I and the driven pulley II cannot transmit torque.
The breaker driving wheel 7 and the driven belt wheel I4 are both driven by the main driving wheel 6, and the main driving wheel 6 is provided with a driving end 62 for connecting an external tool; the driving end 62 is generally a square hole for use with an external closing operation tool; of course, the main driving wheel 6 can be controlled by the motor, and can also be switched between motor control and manual operation, but it is necessary to avoid the manual operation and the motor operation from being performed simultaneously, when the motor is driven by the manual operation, the motor cannot be driven, when the motor is driven by the motor, the motor cannot be operated by the manual operation, and the specific structure and principle can be configured by those skilled in the art according to actual conditions.
Switching on the state: as shown in fig. 5: when the cam 8 is locked at a certain fixed (closing) angle, the arc extinguish chamber 13 and the isolating contact 23 are both in a conducting state, the circuit breaker driving wheel 7 and the cam 8 are in a combined state in a certain rotating direction, the cam 8 enables the driven belt wheel I4 and the driven belt wheel II 5 to be in a disconnecting state through the linkage mechanism, in the state, the arc extinguish chamber 13 can be directly driven to rotate in the fixed direction through the main driving wheel 6 to achieve the opening of the circuit breaker 1, and the circuit breaker driving wheel 7 and the cam 8 also rotate synchronously.
The opening state: as shown in fig. 9: when the cam 8 is locked at another fixed (opening) angle, the arc extinguish chamber 13 and the isolating contact 23 are both in a disconnected state, the circuit breaker driving wheel 7 and the cam 8 are in a disconnected state in another rotating direction, the cam 8 enables the driven belt wheel I4 and the driven belt wheel II 5 to be in a combined state through the linkage mechanism, in the state, the isolating contact 23 can be directly driven to act through the main driving wheel 6 to achieve the closing of the isolating switch, and the circuit breaker driving wheel 7 and the cam 8 rotate asynchronously.
The linkage mechanism of the embodiment comprises a sliding piece 9 and an elastic ejector rod 31, a main driving wheel 6 is connected with a breaker driving wheel 7 through a gear, one end of the breaker driving wheel 7 is provided with a first driving block 72, and a cam 8 is provided with a second driving block 82 matched with the first driving block 72;
one end of the elastic ejector rod 31 is hinged to the side part of the cam 8, and the cam 8 is provided with a rotating angle limiting structure; when the cam 8 rotates to one end of the rotation angle limiting structure, the smaller diameter end of the cam 8 is connected with the sliding piece 9, and the driven pulley I4 and the driven pulley II 5 are in a separated state. When the cam 8 rotates to the other end of the rotation angle limiting structure, the larger diameter end of the cam 8 is connected with the sliding part 9, and the sliding part 9 drives the driven belt wheel II 5 to be combined with the driven belt wheel I4; and when the cam 8 is rotated to both ends of the rotational angle restricting structure, the driving rotational force of the elastic jack 31 to the cam 8 is reversed. The other end of the elastic ejector rod 31 is hinged with a fixed part such as a frame, a machine shell and the like. The elastic push rod 31 only provides elasticity, the elastic force of which is usually provided by a spring, as shown in fig. 5, the bold line in fig. 5 represents the axis of the elastic push rod 31, the cam 8 in fig. 5 has rotated to one end of the angle limiting structure, and the extension line of the axis of the elastic push rod 31 is positioned at the lower right side of the rotation axis center of the cam 8; when the cam 8 rotates to the other end of the angle limiting structure, the extension line of the axis of the elastic push rod 31 is positioned at the upper left side of the rotation axis of the cam 8, so that the rotation driving direction of the cam 8 is changed by the elastic push rod 31 in this way.
The embodiment further comprises a partition plate 3, the partition plate 3 can be a bottom plate of an operation box body, the breaker driving shaft 11 and the disconnector driving shaft 21 both penetrate through the partition plate 3, the partition plate 3 is connected with the sliding piece 9 through a sliding guide piece 32, and the sliding guide piece 32 is used for enabling the sliding piece 9 to rotate according to a fixed axis. The sliding part 9 is provided with a driving inclined plane 91 for driving the driven pulley II 5 to axially slide, the sliding part 9 is provided with a sliding part spring 33 for driving the end part of the sliding part 9 to be attached to the cam 8, a driven pulley spring 24 is arranged between the driven pulley I4 and the driven pulley II 5, the driven pulley II 5 moves towards the direction far away from the driven pulley I4 through the elasticity of the pulley spring 24, and meanwhile the driving inclined plane 91 can drive the driven pulley II 5 to be combined with the driven pulley I4 and transmit torque.
The specific structure for combining or separating the first driven belt wheel 4 and the second driven belt wheel 5 is as follows: the opposite surfaces of the driven belt wheel I4 and the driven belt wheel II 5 are respectively provided with a first end surface tooth 41 and a second end surface tooth 51; when the driven pulley I4 and the driven pulley II 5 are in a combined state, the driving inclined plane 91 drives the driven pulley II 5 to move towards the driven pulley I4 until the end surface teeth I41 are meshed with the end surface teeth II 51; when the driven pulleys 4 and 5 are in a separated state, the first end face teeth 41 are disengaged from the second end face teeth 51.
The main driving wheel 6 of the present embodiment includes a main driving gear 61 and a driving pulley 63 fixedly connected, and the position between the main driving gear 61 and the driving pulley 63 is fixed. The driving gear 61 is engaged with the breaker driving wheel 7 through a gear, and the driving pulley 63 drives the driven pulley one 4 through the timing belt 42, so that the driving gear 61 and the breaker driving wheel 7 rotate in opposite directions, and the driving pulley 63 and the driven pulley one 4 rotate in the same direction.
Since the arc-extinguishing chamber 13 needs to be quickly separated and combined, and the speed of the initial motion stage of the cam 8 is relatively low, in order to ensure that the driving force and the driving speed of the motion of the arc-extinguishing chamber 13 can meet the normal requirements, the arc-extinguishing chamber 13 is preferably driven to a certain extent when the motion speed and the driving force of the cam 8 reach. To achieve this, the cam 8 of this embodiment is provided with a second notch 83, the circuit breaker driving shaft 11 is connected with the second notch 83 through the driving pin 111, when the cam 8 is locked at a certain fixed angle, the driving pin 111 is connected with one end of the second notch 83, and when the cam 8 is locked at another fixed angle, the driving pin 111 is connected with the other end of the second notch 83.
The rotation angle limiting structure of the cam 8 of the present embodiment includes a limiting post 25, a notch 81 is formed on the side of the cam 8, when the cam 8 is locked at a certain fixed angle, the limiting post 25 is connected to one end of the notch 81, and when the cam 8 is locked at another fixed angle, the limiting post 25 is connected to the other end of the notch 81. The spacing post 25 is vertically installed on the partition plate 3.
In order to limit the rotation limit of the main driving wheel 6, the main driving wheel can only rotate in the opening direction when in the closing state, and can only rotate in the closing direction when in the opening state.
The embodiment also discloses a working method of the circuit breaker cabinet adopting the single-ended driving operation, which comprises the following steps: for the convenience of viewing, some parts are hidden in fig. 5 to 11, but the explanation and explanation of the method are not affected. The method comprises a switching-off step and a switching-on step, as shown in fig. 5 to 8: fig. 5 shows a closing state in which an opening operation is performed, specifically as follows:
the method comprises the following steps: the circuit breaker driving wheel 7 is driven to rotate by the main driving wheel 6, the circuit breaker driving wheel 7 is meshed with the main driving wheel through a gear, and therefore synchronously rotates, specifically, as shown by an arrow in fig. 5, when the first driving block 72 acts on the second driving block 82, the cam 8 is driven to rotate towards the opening direction, and since the circuit breaker driving shaft 11 is connected with the second notch 83 through the driving pin 111, and a gap is formed between the second notch 83 and the driving pin 111, the circuit breaker driving shaft 11 does not rotate in the initial stage of the rotation of the cam 8.
As shown in fig. 6: step two: after the direction of the rotational driving force of the elastic push rod 31 to the cam 8 is changed, the elastic push rod 31 can rapidly drive the cam 8 to rotate towards the opening direction, and since the first driving block 72 is manually driven, the first driving block 72 does not have the second driving block 82 with high rotational speed, so that the second driving block 82 is separated from the first driving block 72, when the first driving block 72 further rotates until the end of the second notch 83 contacts with the driving pin 111, the second driving block 82 can drive the moving contact of the arc-extinguishing chamber 13 to rapidly move towards the direction away from the fixed contact until the cam 8 drives the circuit breaker driving shaft 11 to rotate to the state that the arc-extinguishing chamber 13 is disconnected (fig. 7, the cam 8 also rotates to another limit position), and meanwhile, the cam 8 drives the sliding piece 9 to move towards the direction of driving the second driven pulley 5, and the second driven pulley 5 is combined with the first driven pulley 4 through the action of the driving inclined plane 91.
As shown in fig. 8: step three: the main driving wheel 6 continues to rotate, and a rotating gap exists between the second driving block 82 and the first driving block 72, so that the main driving wheel 6 can drive the isolating contact 23 to move to the opening direction through the first driven pulley 4 and the second driven pulley 5 to move to the opening state. When the circuit breaker driving wheel 7 rotates to the opening state, the main driving wheel 6 cannot rotate forwards continuously and can only rotate reversely, in order to limit the rotation angle of the main driving wheel 6, an angle limiting structure can be adopted, for example, a limiting ring groove is formed in the circuit breaker driving wheel 7, a fixed limiting pin is installed on the partition plate 3, the limiting pin is inserted into the limiting ring groove to control the rotation limit of the circuit breaker driving wheel 7, and the circuit breaker driving wheel 7 and the main driving wheel 6 rotate synchronously, so that the rotation limit of the main driving wheel 6 is limited.
As shown in fig. 9 to 11: the specific closing step comprises the following steps of,
the method comprises the following steps: as shown in fig. 9: fig. 9 shows the switching-off state, in which the main driving wheel 6 sequentially passes through the first driven pulley 4 and the second driven pulley 5 to drive the isolation contact 23 to move in the switching-on direction, and the first driving block 72 drives the cam 8 to rotate in the switching-on direction from the other direction.
Step two: as shown in fig. 10 and 11: when the isolation contact 23 rotates to a closing state, the driven belt wheel I4 and the driven belt wheel II 5 are separated, and the driving rotation direction of the cam 8 by the elastic ejector rod 31 is changed. Under the action force of the elastic ejector rod 31, the elastic ejector rod 31 rapidly realizes the closing of the arc extinguishing chamber 13 through the cam 8.
Compared with the prior art, the embodiment has the following advantages: in the embodiment, the circuit breaker 1 and the disconnecting switch 2 can be logically controlled by only operating the rotation of one main driving wheel 6. When the closing operation is carried out, the disconnecting switch 2 can only be operated firstly and then the circuit breaker 1 is operated; during the opening operation, the circuit breaker 1 can only be operated firstly, and then the isolating switch 2 is operated, so that the complexity of the operation of the circuit breaker cabinet is reduced, and the probability of misoperation is further reduced.
When the circuit breaker 1 is operated, the torque transmission between the cam 8 and the circuit breaker driving shaft 11 is realized by the matching of the second notch 83 and the driving pin 111, and the movement of the cam 8 is realized by the thrust of the elastic ejector rod 31, so that when the rotating speed of the cam 8 is increased to a certain degree, the movable contact of the arc extinguish chamber 13 is driven, and the speed and the force of the arc extinguish chamber 13 are ensured.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A circuit breaker cabinet with single-end driving operation comprises a circuit breaker (1) and a disconnecting switch (2) which are arranged in series, wherein the circuit breaker (1) comprises a circuit breaker driving shaft (11) and an arc extinguish chamber (13), a driving groove (12) is formed in the side part of the circuit breaker driving shaft (11), and the driving groove (12) is connected with an operation end of the arc extinguish chamber (13); the isolating switch (2) comprises an isolating switch driving shaft (21) and an isolating contact (23), wherein the isolating switch driving shaft (21) drives the isolating contact (23) to switch on or switch off through a crank arm (22);
the method is characterized in that: the disconnecting switch driving shaft (21) is provided with a first driven belt wheel (4) and a second driven belt wheel (5), the first driven belt wheel (4) can rotate freely relative to the disconnecting switch driving shaft (21), the second driven belt wheel (5) can be axially and slidably connected to the disconnecting switch driving shaft (21) and rotates synchronously with the disconnecting switch driving shaft (21), and the breaker driving shaft (11) is connected with a breaker driving wheel (7) through a cam (8);
the cam (8) can rotate by taking a breaker driving shaft (11) as an axis and is locked at certain two fixed angles,
the side part of the cam (8) drives the driven belt wheel I (4) and the driven belt wheel II (5) to be combined or separated through a linkage mechanism;
the circuit breaker driving wheel (7) and the driven belt wheel I (4) are driven by a main driving wheel (6), and the main driving wheel (6) is provided with a driving end (62) used for connecting an external tool;
when the cam (8) is locked at a closing angle, the arc extinguish chamber (13) and the isolation contact (23) are both in a conducting state, the circuit breaker driving wheel (7) and the cam (8) are in a combined state in a switching-off rotating direction, and the cam (8) enables the driven belt wheel I (4) and the driven belt wheel II (5) to be in a disconnecting state through a linkage mechanism;
when cam (8) lock in the separating brake angle, explosion chamber (13), isolation contact (23) all are in the off-state, and circuit breaker drive wheel (7) and cam (8) are in the off-state at the closing rotation direction, cam (8) make passive band pulley (4), passive band pulley two (5) be in the bonding state through link gear.
2. A single-ended drive operated circuit breaker cabinet according to claim 1, wherein: the linkage mechanism comprises a sliding piece (9) and an elastic ejector rod (31), the main driving wheel (6) is connected with a breaker driving wheel (7) through a gear, a first driving block (72) is arranged at one end of the breaker driving wheel (7), and a second driving block (82) matched with the first driving block (72) is arranged on the cam (8);
one end of the elastic ejector rod (31) is hinged to the side part of the cam (8), and the cam (8) is provided with a rotating angle limiting structure;
when the cam (8) rotates to one end of the rotation angle limiting structure, the smaller diameter end of the cam (8) is connected with the sliding part (9), and the driven belt wheel I (4) and the driven belt wheel II (5) are in a separated state;
when the cam (8) rotates to the other end of the rotating angle limiting structure, the end with the larger diameter of the cam (8) is connected with the sliding piece (9), and the sliding piece (9) drives the driven belt wheel II (5) to be combined with the driven belt wheel I (4);
when the cam (8) rotates to the two ends of the rotation angle limiting structure, the driving rotating force of the elastic push rod (31) to the cam (8) is opposite.
3. A single-ended drive operated circuit breaker cabinet according to claim 2, wherein: the sliding part (9) is provided with a driving inclined plane (91) for driving the driven belt wheel II (5) to axially slide, the sliding part (9) is provided with a sliding part spring (33) for driving the end part of the sliding part (9) to be attached to the cam (8), and a driven belt wheel spring (24) is arranged between the driven belt wheel I (4) and the driven belt wheel II (5);
the opposite surfaces of the first driven belt wheel (4) and the second driven belt wheel (5) are respectively provided with a first end surface tooth (41) and a second end surface tooth (51); when the driven pulley I (4) and the driven pulley II (5) are in a combined state, the driving inclined plane (91) drives the driven pulley II (5) to move towards the driven pulley I (4) until the end surface teeth I (41) are meshed with the end surface teeth II (51); when the driven belt wheel I (4) and the driven belt wheel II (5) are in a separated state, the end face teeth I (41) are separated from the end face teeth II (51).
4. A single-ended drive operated circuit breaker cabinet according to claim 3, wherein: the driving wheel (6) comprises a driving gear (61) and a driving belt wheel (63) which are fixedly connected, the driving gear (61) is meshed with the circuit breaker driving wheel (7) through a gear, and the driving belt wheel (63) drives the driven belt wheel I (4) through a synchronous belt (42).
5. A single-ended drive operated circuit breaker cabinet according to claim 2, wherein: the cam (8) is provided with a second notch (83), the circuit breaker driving shaft (11) is connected with the second notch (83) through the driving pin (111), when the cam (8) is locked at a certain fixed angle, the driving pin (111) is connected with one end of the second notch (83), and when the cam (8) is locked at another fixed angle, the driving pin (111) is connected with the other end of the second notch (83).
6. A single-ended drive operated circuit breaker cabinet according to claim 2, wherein: the rotation angle limiting structure comprises a limiting column (25), a first notch (81) is arranged on the side portion of the cam (8), when the cam (8) is locked at a certain fixed angle, one end of the first notch (81) is connected with the limiting column (25), and when the cam (8) is locked at another fixed angle, the other end of the first notch (81) is connected with the limiting column (25).
7. A single-ended drive operated circuit breaker cabinet according to claim 6, wherein: still include baffle (3), baffle (3) are all passed to circuit breaker drive shaft (11), isolator drive shaft (21), slider (9) are connected through sliding guide (32) in baffle (3), baffle (3) are connected in spacing post (25).
8. Method of operating a single-ended drive operated circuit breaker cabinet according to claim 4, characterized in that: the method comprises the steps of switching off and switching on, wherein the step of switching off comprises the following steps:
the method comprises the following steps: the circuit breaker driving wheel (7) is driven to rotate through the main driving wheel (6), and the driving block I (72) acts on the driving block II (82) to drive the cam (8) to rotate towards the opening direction;
step two: after the force of the elastic ejector rod (31) on the rotation driving direction of the cam (8) is changed, the driving block II (82) is separated from the driving block I (72), the cam (8) drives the circuit breaker driving shaft (11) to rotate to the state that the arc extinguish chamber (13) is disconnected, and meanwhile, the cam (8) drives the driven belt wheel II (5) to be combined with the driven belt wheel I (4) through the sliding piece (9);
step three: the main driving wheel (6) drives the isolation contact (23) to move to a brake-separating state in a breaking direction sequentially through the driven belt wheel I (4) and the driven belt wheel II (5);
the switching-on step comprises:
the method comprises the following steps: the main driving wheel (6) drives the isolation contact (23) to move towards the closing direction sequentially through the driven belt wheel I (4) and the driven belt wheel II (5), and meanwhile, the driving block I (72) drives the cam (8) to rotate towards the closing direction from the other direction;
step two: when the isolation contact (23) rotates to a closing state, the driven belt wheel I (4) and the driven belt wheel II (5) are separated, and the driving rotation direction of the elastic ejector rod (31) to the cam (8) is changed;
step three: the elastic ejector rod (31) is communicated with the arc extinguish chamber (13) through the cam (8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111340209.9A CN114093690B (en) | 2021-11-12 | 2021-11-12 | Circuit breaker cabinet operated in single-end driving mode and working method |
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| CN202111340209.9A CN114093690B (en) | 2021-11-12 | 2021-11-12 | Circuit breaker cabinet operated in single-end driving mode and working method |
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| CN114093690B CN114093690B (en) | 2022-07-15 |
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|---|---|
| CN114093690B (en) | 2022-07-15 |
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