CN112713050A - Electromagnetic quick mechanism and quick mechanical switch - Google Patents
Electromagnetic quick mechanism and quick mechanical switch Download PDFInfo
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- CN112713050A CN112713050A CN202011444315.7A CN202011444315A CN112713050A CN 112713050 A CN112713050 A CN 112713050A CN 202011444315 A CN202011444315 A CN 202011444315A CN 112713050 A CN112713050 A CN 112713050A
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- coil
- electromagnetic
- induction disc
- half section
- accelerating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
- H01H33/38—Power arrangements internal to the switch for operating the driving mechanism using electromagnet
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
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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
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
Abstract
The invention provides an electromagnetic quick mechanism and a quick mechanical switch, wherein the electromagnetic quick mechanism comprises: a transmission rod; the induction disc is fixed on the transmission rod; at least two electromagnetic coils; an electromagnetic coil control circuit; in the switching-on and switching-off process, the electromagnetic coil closest to the induction disc is electrified to drive the induction disc to move; at least one of the electromagnetic coils is an accelerating coil, and the accelerating coil is electrified in the front half section and is powered off in the rear half section through which the induction disc passes; at least one of the electromagnetic coils is a speed reduction coil, and the speed reduction coil is powered off in the first half section and powered on in the second half section when the induction disc passes through. The invention accelerates the induction disc in the early stage of opening and closing by using the accelerating coil, shortens the whole opening and closing time, decelerates the induction disc in the later stage of opening and closing by using the decelerating coil, avoids the impact on the arc extinguish chamber or the operating mechanism body caused by overlarge speed, prolongs the service life of the operating mechanism and the arc extinguish chamber, and can perform large-stroke opening and closing by reasonably setting the number of the electromagnetic coils.
Description
Technical Field
The invention relates to the technical field of high-voltage switch equipment, in particular to an electromagnetic quick mechanism and a quick mechanical switch.
Background
The existing rapid mechanical switch mainly comprises a repulsion mechanism and a moving end assembly, wherein the repulsion mechanism comprises a charger, an energy storage capacitor, a thyristor, a repulsion coil and a repulsion disc, and the moving end assembly comprises a moving contact, a moving contact seat and a transmission rod for driving the moving contact to move along the opening and closing direction. After the switch is powered on, the charger charges the energy storage capacitor and the buffer capacitor which are used for switching on and off, when the switch is switched on, the system receives a switch-on instruction, the thyristor which controls discharging is triggered, at the moment, the thyristor is conducted, current is discharged to the switch-on coil through the thyristor, at the moment, the repulsion plate generates a force moving in the opposite direction due to the eddy current effect, so that the repulsion plate is pushed to drive the transmission shaft to move, the switch-on motion is realized, and at the end stage of a stroke, due to the fact that the speed is too high, the. When the system is in brake-off, the system receives a brake-off command to trigger a brake-off thyristor, the current of the brake-off coil generates vortex on the repulsion plate, and then generates repulsion force for pushing the repulsion plate to perform brake-off motion, and at the end of a stroke, the buffer coil is required to be involved to decelerate the repulsion plate, so that the impact on the bottom is reduced.
At present, because the opening coil and the closing coil are arranged at two ends of the repulsion mechanism, the repulsion plate is opened and closed by virtue of the repulsion generated instantly, and no other assistance is provided in the moving process, the quick switch can only be limited by small-stroke opening and closing, the principle defect that the large-stroke opening and closing cannot be overcome is still provided, and the development of the quick switch towards the direction of large opening distance is limited. Therefore, there is a need for a fast electromagnetic mechanism and a fast mechanical switch capable of performing a long-stroke on/off operation, which can ensure both rapid opening/closing and effective buffering, prolong the service life of the mechanism and the switch, and improve reliability.
Disclosure of Invention
The invention aims to provide an electromagnetic quick mechanism which can ensure that the brake can be quickly switched on and off, effective buffering can be ensured, and the large-stroke switching-on and switching-off can be carried out; the invention also aims to provide a quick mechanical switch which can ensure quick opening and closing, effective buffering and large-stroke opening and closing.
In order to achieve the purpose, the electromagnetic quick mechanism adopts the following technical scheme:
an electromagnetic snap mechanism comprising:
the transmission rod is used for being in transmission connection with the moving contact in the arc extinguishing chamber;
the induction disc is fixed on the transmission rod;
the electromagnetic coils are arranged outside the transmission rod at intervals along the axial direction of the transmission rod, and each electromagnetic coil is positioned on the moving path of the induction disc so as to enable the induction disc to sequentially penetrate through the induction disc in the opening and closing process;
the electromagnetic coil control circuits are provided with at least two electromagnetic coils which are connected with each electromagnetic coil in a one-to-one correspondence manner so as to control the electrification and the outage of the electromagnetic coils;
in the switching-on and switching-off process, the electromagnetic coil closest to the induction disc in each electromagnetic coil is electrified and then used for driving the induction disc to move;
in the switching-on and switching-off process, at least one of the electromagnetic coils is an accelerating coil, the accelerating coil is electrified in the front half section through which the induction disc passes, and the rear half section is powered off, so that the induction disc moves under the accelerating force in the front half section through which the induction disc passes, and moves by means of inertia in the rear half section;
in the switching-on and switching-off process, at least one of the electromagnetic coils is a speed reduction coil, the speed reduction coil is powered off in the first half section through which the induction disc passes, and the speed reduction coil is powered on in the second half section, so that the induction disc moves through the first half section of the speed reduction coil by means of inertia, and the induction disc moves through the second half section of the speed reduction coil by means of speed reduction force.
The beneficial effects of the above technical scheme are that: according to the invention, the plurality of electromagnetic coils are arranged on the moving path of the induction disc, so that the electromagnetic coil closest to the induction disc is electrified to drive the induction disc to move. Therefore, the electromagnetic coil control circuit is arranged, the power-on and power-off time of the electromagnetic coil can be controlled, the electromagnetic coil is powered on in the first half section and powered off in the second half section through which the induction disc passes to form the accelerating coil, and the electromagnetic coil is powered off in the first half section and powered on in the second half section through which the induction disc passes to form the decelerating coil, so that the induction disc is accelerated by the accelerating coil in the switching-on and switching-off process, the integral switching-on and switching-off time is shortened, rapid switching-on and switching-off are ensured, meanwhile, the induction disc is decelerated by the decelerating coil in the later stage of switching-on and switching-off, effective buffering is ensured, the phenomenon that the speed is overlarge to impact an arc extinguish chamber or an operating. In addition, the number of the electromagnetic coils is reasonably set, so that the large-stroke on-off can be carried out, and the speed and the later buffer in the on-off process are ensured.
Furthermore, in order to facilitate the movement of the induction disc and the arrangement of the electromagnetic coils, the electromagnetic quick mechanism further comprises a cylinder body fixedly connected with the arc extinguish chamber, the transmission rod and the induction disc are arranged in the cylinder body, the induction disc is movably matched with the inner wall of the cylinder body in a guiding manner, and each electromagnetic coil is sleeved outside the cylinder body.
Furthermore, the induction disc is fixed at the end part of the transmission rod for convenient arrangement and simplified structure.
Furthermore, in order to conveniently control the energization and the de-energization of the coil, the electromagnetic coil control circuit comprises an energy storage capacitor and a thyristor.
Furthermore, in order to improve the acceleration effect and optimize the power-on time, at least two acceleration coils are arranged, each acceleration coil comprises an initial acceleration coil for the induction disc to pass through firstly and a subsequent acceleration coil for the induction disc to pass through later, and the subsequent acceleration coils are powered on when the induction disc is about to leave the initial acceleration coils.
In order to achieve the purpose, the quick mechanical switch adopts the following technical scheme:
the utility model provides a quick mechanical switch, includes explosion chamber and the moving contact of setting in the explosion chamber, quick mechanical switch still includes electromagnetism quick mechanism, and electromagnetism quick mechanism includes:
the transmission rod is in transmission connection with the moving contact in the arc extinguishing chamber;
the induction disc is fixed on the transmission rod;
the electromagnetic coils are arranged outside the transmission rod at intervals along the axial direction of the transmission rod, and each electromagnetic coil is positioned on the moving path of the induction disc so as to enable the induction disc to sequentially penetrate through the induction disc in the opening and closing process;
the electromagnetic coil control circuits are provided with at least two electromagnetic coils which are connected with each electromagnetic coil in a one-to-one correspondence manner so as to control the electrification and the outage of the electromagnetic coils;
in the switching-on and switching-off process, the electromagnetic coil closest to the induction disc in each electromagnetic coil is electrified and then used for driving the induction disc to move;
in the switching-on and switching-off process, at least one of the electromagnetic coils is an accelerating coil, the accelerating coil is electrified in the front half section through which the induction disc passes, and the rear half section is powered off, so that the induction disc moves under the accelerating force in the front half section through which the induction disc passes, and moves by means of inertia in the rear half section;
in the switching-on and switching-off process, at least one of the electromagnetic coils is a speed reduction coil, the speed reduction coil is powered off in the first half section through which the induction disc passes, and the speed reduction coil is powered on in the second half section, so that the induction disc moves through the first half section of the speed reduction coil by means of inertia, and the induction disc moves through the second half section of the speed reduction coil by means of speed reduction force.
The beneficial effects of the above technical scheme are that: according to the invention, the plurality of electromagnetic coils are arranged on the moving path of the induction disc, so that the electromagnetic coil closest to the induction disc is electrified to drive the induction disc to move. Therefore, the electromagnetic coil control circuit is arranged, the power-on and power-off time of the electromagnetic coil can be controlled, the electromagnetic coil is powered on in the first half section and powered off in the second half section through which the induction disc passes to form the accelerating coil, and the electromagnetic coil is powered off in the first half section and powered on in the second half section through which the induction disc passes to form the decelerating coil, so that the induction disc is accelerated by the accelerating coil in the switching-on and switching-off process, the integral switching-on and switching-off time is shortened, rapid switching-on and switching-off are ensured, meanwhile, the induction disc is decelerated by the decelerating coil in the later stage of switching-on and switching-off, effective buffering is ensured, the phenomenon that the speed is overlarge to impact an arc extinguish chamber or an operating. In addition, the number of the electromagnetic coils is reasonably set, the large-stroke breaking can be realized, the problem of short stroke of a traditional repulsion principle mechanism is solved, and the speed and the later buffer in the breaking process are ensured.
Furthermore, in order to facilitate the movement of the induction disc and the arrangement of the electromagnetic coils, the electromagnetic quick mechanism further comprises a cylinder body fixedly connected with the arc extinguish chamber, the transmission rod and the induction disc are arranged in the cylinder body, the induction disc is movably matched with the inner wall of the cylinder body in a guiding manner, and each electromagnetic coil is sleeved outside the cylinder body.
Furthermore, the induction disc is fixed at the end part of the transmission rod for convenient arrangement and simplified structure.
Furthermore, in order to conveniently control the energization and the de-energization of the coil, the electromagnetic coil control circuit comprises an energy storage capacitor and a thyristor.
Furthermore, in order to improve the acceleration effect and optimize the power-on time, at least two acceleration coils are arranged, each acceleration coil comprises an initial acceleration coil for the induction disc to pass through firstly and a subsequent acceleration coil for the induction disc to pass through later, and the subsequent acceleration coils are powered on when the induction disc is about to leave the initial acceleration coils.
Drawings
FIG. 1 is a perspective view of a quick mechanical switch of the present invention;
FIG. 2 is a structural diagram of the fast mechanical switch of the present invention in the open state;
FIG. 3 is a block diagram of the fast mechanical switch of the present invention during the acceleration of closing (the first solenoid is energized);
FIG. 4 is a block diagram of the fast mechanical switch of the present invention during the acceleration of closing (the first solenoid is de-energized);
FIG. 5 is a block diagram of the fast mechanical switch of the present invention during the acceleration of closing (the second solenoid is energized);
FIG. 6 is a block diagram of the fast mechanical switch of the present invention during the acceleration of closing (the second solenoid is de-energized);
FIG. 7 is a block diagram of the present invention fast mechanical switch during closing deceleration (third solenoid is energized);
FIG. 8 is a block diagram of the present invention fast mechanical switch during closing deceleration (fourth solenoid is energized);
FIG. 9 is a block diagram of the fast mechanical switch in the present invention in a closed position;
FIG. 10 is a block diagram of the present invention fast mechanical switch during the opening acceleration (fourth solenoid is de-energized);
FIG. 11 is a block diagram of the present invention fast mechanical switch during the opening acceleration (third solenoid is de-energized);
FIG. 12 is a block diagram of the present invention fast mechanical switch during the opening deceleration process (second solenoid is initially energized);
FIG. 13 is a block diagram of the present invention fast mechanical switch during the opening deceleration process (first solenoid is energized);
FIG. 14 is a block diagram of the present invention quick mechanical switch in the open position;
in the figure: 1-a first electromagnetic coil; 2-a second electromagnetic coil; 3-a third electromagnetic coil; 4-a fourth electromagnetic coil; 5-a first solenoid control circuit; 6-a second solenoid control circuit; 7-a third solenoid control circuit; 8-a fourth solenoid control circuit; 9-a transmission rod; 10-a cylinder body; 11-a sensing disc; 12-arc extinguishing chamber.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
One embodiment of the fast mechanical switch of the present invention is shown in fig. 1, and includes an arc extinguish chamber 12 and a moving contact (not shown) disposed in the arc extinguish chamber 12, and the fast mechanical switch further includes an electromagnetic fast mechanism, where the electromagnetic fast mechanism includes a cylinder 10, a transmission rod 9, an induction disc 11, a first electromagnetic coil 1, a second electromagnetic coil 2, a third electromagnetic coil 3, and a fourth electromagnetic coil 4.
The induction disc 11 is fixed at one end of the transmission rod 9, and the other end of the transmission rod 9 is in transmission connection with a movable contact in the arc extinguish chamber 12. One end and the explosion chamber 12 fixed connection of barrel 10, transfer line 9 and response dish 11 all set up in barrel 10, and response dish 11 and barrel 10 inner wall direction removal cooperation. The first electromagnetic coil 1, the second electromagnetic coil 2, the third electromagnetic coil 3 and the fourth electromagnetic coil 4 are sleeved and fixed outside the cylinder body 10, the four electromagnetic coils are arranged along the axial direction of the transmission rod 9 at intervals, namely arranged along the axial direction of the cylinder body 10 at intervals, and each electromagnetic coil is located on a moving path of the induction disc 11 so that the induction disc 11 can sequentially penetrate through in the opening and closing process.
The electromagnetic quick mechanism further comprises four electromagnetic coil control circuits, each electromagnetic coil control circuit is connected with each electromagnetic coil in a one-to-one correspondence mode to control the electrification and the power failure of each electromagnetic coil, and the four electromagnetic coil control circuits are respectively as follows: the electromagnetic control device comprises a first electromagnetic coil control circuit 5 connected with a first electromagnetic coil 1, a second electromagnetic coil control circuit 6 connected with a second electromagnetic coil 2, a third electromagnetic coil control circuit 7 connected with a third electromagnetic coil 3, and a fourth electromagnetic coil control circuit 8 connected with a fourth electromagnetic coil 4, wherein each electromagnetic coil control circuit comprises an energy storage capacitor and a thyristor.
Further, the electromagnetic quick mechanism further includes a controller (not shown in the figure) which is in control connection with the capacitance in each electromagnetic coil, respectively, and the electromagnetic quick mechanism further includes a position sensor for detecting the movement position of the inductive disk 11, the position sensor also being connected with the controller to feed back the detection signal to the controller.
As shown in fig. 2, when the electromagnetic fast mechanism is in an open state, in a closing acceleration stress mode, the controller controls the capacitors of the first electromagnetic coil 1 and the second electromagnetic coil 2 to sequentially discharge, and in a closing deceleration stress mode, the controller controls the capacitors of the third electromagnetic coil 3 and the fourth electromagnetic coil 4 to sequentially discharge.
The specific control logic is as follows: after receiving a closing command, as shown in fig. 3, the first electromagnetic coil 1 is closest to the inductive disc 11, the controller controls the capacitor of the first electromagnetic coil 1 to trigger discharge, and the inductive disc 11 is subjected to electromagnetic attraction generated by the first electromagnetic coil 1 at this time to drive the inductive disc 11 to perform forward acceleration motion, that is, the first electromagnetic coil 1 is a closing drive coil and is a closing acceleration coil.
As shown in fig. 4, when the sensing plate 11 moves to the central position of the width of the first electromagnetic coil 1, namely 1/2, in order to ensure that the sensing plate 11 is not decelerated by the electromagnetic attraction force in the opposite direction of the first electromagnetic coil 1, the capacitance of the first electromagnetic coil 1 needs to be discharged at the position 1/2 where the head end of the sensing plate 11 moves to the first electromagnetic coil 1, and then the sensing plate 11 continues to move forward by inertia.
As shown in fig. 5, when the head end of the sensing plate moves to the tail end of the first electromagnetic coil 1 in the moving direction, that is, when the sensing plate 11 is about to leave the first electromagnetic coil 1, the thyristor of the energy storage capacitor of the second electromagnetic coil 2 is turned on to discharge, the sensing plate 11 is attracted again at this time to accelerate to move in the closing direction, similarly to the first electromagnetic coil 1, when the head end of the sensing plate moves to the central position, namely the marked 1/2 position, of the second electromagnetic coil 2, as shown in fig. 6, the energy storage capacitor of the second electromagnetic coil 2 has been discharged, and thereafter, the sensing plate 11 continues to move forward by inertia.
After the second electromagnetic coil 2 is moved out, the deceleration state is performed, as shown in fig. 7, the capacitance of the third electromagnetic coil 3 is discharged by the controller when the head end of the inductive disk moves to the 1/2 position of the third electromagnetic coil 3, at this time, the force generated by the third electromagnetic coil 3 on the inductive disk 11 will hinder the forward movement of the inductive disk 11, and the whole mechanism starts to decelerate. Similarly, the third solenoid coil 3, as shown in fig. 8, discharges the energy storage capacitor connected to the third solenoid coil 4 when the inductive disc 11 moves to position 1/2 of the coil, and continues to provide the retarding force for the mechanism. The capacitance and the charging voltage which provide buffering in the motion process can be changed, the speed of the capacitor moving to the terminal point is guaranteed to be small, and the impact on a subsequent arc extinguish chamber is reduced.
As shown in fig. 9, when the electromagnetic fast mechanism is in a closing in-place state, in a closing acceleration stress mode, the controller controls the capacitors of the fourth electromagnetic coil 4 and the third electromagnetic coil 3 to sequentially discharge in sequence, and in a closing deceleration stress mode, the controller controls the capacitors of the second electromagnetic coil 2 and the first electromagnetic coil 1 to sequentially discharge in sequence.
The specific control logic is as follows: after receiving a brake-separating command, the fourth electromagnetic coil 4 is closest to the induction disc 11, the controller controls the thyristor of the energy storage capacitor of the fourth electromagnetic coil 4 to be conducted and discharge through the fourth electromagnetic coil 4, and electromagnetic attraction is generated on the induction disc 11 to drive the induction disc 11 to perform accelerated motion (namely backward accelerated motion) along the brake-separating direction, namely the fourth electromagnetic coil 4 is a brake-separating drive coil and a brake-separating acceleration coil.
As shown in fig. 10, when the sensing plate 11 moves to the 1/2 position of the fourth electromagnetic coil 4, the energy storage capacitor of the fourth electromagnetic coil 4 is discharged, and the sensing plate 11 continues to move backward by inertia. When the head end of the inductive disc 11 goes out of the fourth electromagnetic coil 4, that is, when the inductive disc 11 is about to leave the fourth electromagnetic coil 4, the thyristor of the energy storage capacitor of the third electromagnetic coil 3 is turned on, and the capacitor starts to discharge and continues to generate electromagnetic attraction to drive the inductive disc 11 to accelerate the opening movement.
As shown in fig. 11, when the sensing plate 11 moves to the 1/2 position of the third electromagnetic coil 3, the energy storage capacitor of the third electromagnetic coil 3 is discharged. After the third electromagnetic coil 3 is completely moved out, as shown in fig. 12, when the inductive disc 11 continues to move to the 1/2 position of the second electromagnetic coil 2 by inertia, the energy storage capacitor of the second electromagnetic coil 2 starts to discharge at this time, the generated electromagnetic attraction becomes resistance to the backward movement of the inductive disc 11, and at this time, the mechanism driven by the inductive disc 11 will decelerate.
As shown in fig. 13, when the sensing plate 11 moves to 1/2 of the first electromagnetic coil 1, the capacitance of the first electromagnetic coil 1 discharges, and continues to generate a force to the sensing plate 11 to resist the movement, and continues to decelerate the sensing plate. The speed of moving to the terminal point is ensured to be very low by changing the sizes of the capacitor and the voltage, and the impact on the operating mechanism body is reduced. As shown in fig. 14, the fast mechanical switch is in the open position.
In summary, the plurality of electromagnetic coils are arranged on the moving path of the induction disc, so that the electromagnetic coil closest to the induction disc is electrified to drive the induction disc to move, and the principle of the electromagnetic coil cannon is utilized, when the induction disc passes through the electromagnetic coils, if the electromagnetic coils are always electrified, the first half section can generate acceleration force on the induction disc, and the second half section can generate resistance force on the induction disc, so that the four electromagnetic coils are arranged, the corresponding electromagnetic coil control circuits are respectively arranged to control the electrifying and power-off time of each electromagnetic coil, the electromagnetic coils are electrified in the first half section and powered off in the second half section through which the induction disc passes, the induction disc becomes an acceleration coil, the induction disc is accelerated by the force in the first half section through the acceleration coil, and moves by the inertia in the second half section; the electromagnetic coil is powered off in the first half section and powered on in the second half section of the induction disc to form a speed reducing coil, and the induction disc moves through the speed reducing coil in the first half section by means of inertia and moves under the speed reducing force in the second half section.
For example, in the closing process, the first electromagnetic coil 1 and the second electromagnetic coil 2 are used as accelerating coils in the electromagnetic coils, the coils are electrified through the discharging of a capacitor, the coils are powered off through the discharging of the capacitor, the induction disc is accelerated through controlling the powering on and powering off time, the initial speed of a switch with large motion quality is increased, the time of the whole closing stroke is shortened, and the rapid opening and closing of the switch are ensured. And, the first electromagnetic coil 1 forms a first acceleration coil through which the induction disc passes first, and the second electromagnetic coil 2 forms a second acceleration coil through which the induction disc passes later, the second acceleration coil being energized when the induction disc is about to leave the first acceleration coil.
In the switching-on process, the third electromagnetic coil 3 and the fourth electromagnetic coil 4 are used as the speed reduction coils in the electromagnetic coils, the coils are powered on through the discharging of the capacitor, the coils are powered off through the discharging of the capacitor, the speed of the induction disc is reduced through controlling the power-on and power-off time, the effective speed reduction is realized at the terminal, the effective buffering is guaranteed, the phenomenon that the arc extinguish chamber is impacted due to overlarge speed is avoided, and the service life of the arc extinguish chamber is prolonged.
The brake separating process is the same as the above, the third electromagnetic coil 3 and the fourth electromagnetic coil 4 are used as accelerating coils in the electromagnetic coils in the brake separating process, the first electromagnetic coil 1 and the second electromagnetic coil 2 are used as decelerating coils in the electromagnetic coils, and the deceleration in the brake separating process is to avoid the impact on the operating mechanism body caused by overlarge speed and prolong the service life of the operating mechanism.
And because the acceleration and deceleration coils can be used in a multi-stage superposition mode according to actual conditions, the number of the electromagnetic coils is reasonably set, the electromagnetic speed-reducing device can adapt to switches with different opening distances and can quickly switch on and switch off, the switching-on and switching-off time of large-range switches can be greatly reduced, the impact time of fault current on a power grid is reduced, and a foundation is laid for the stable operation of the whole power grid.
In other embodiments of the fast mechanical switch, when there are multiple accelerating coils, the post-accelerating coil may also be re-energized when the inductive disk is about to enter the post-accelerating coil.
In other embodiments of the fast mechanical switch, the number of the accelerating coils and the number of the decelerating coils can be designed according to actual needs, of course, only one accelerating coil can be arranged, and only one decelerating coil can be arranged, that is, two electromagnetic coils are arranged in total, in the process of opening and closing, one is responsible for driving and accelerating, and the other is responsible for decelerating.
In other embodiments of the quick mechanical switch, the solenoid control circuit may also include a power source and a switch, with the controller controlling the switch on and off.
In other embodiments of the fast mechanical switch, the end of the transmission rod may also pass through the sensing disk.
In other embodiments of the fast mechanical switch, the electromagnetic fast mechanism may not include the cylinder, and since the transmission rod is in transmission connection with the moving contact in the arc extinguishing chamber, the transmission rod and the induction disc can be ensured to move stably to some extent.
The embodiment of the electromagnetic quick mechanism in the invention is as follows: the specific structure of the electromagnetic quick mechanism is the same as that of the above-mentioned quick mechanical switch embodiment, and will not be repeated here.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (10)
1. An electromagnetic snap mechanism, comprising:
the transmission rod is used for being in transmission connection with the moving contact in the arc extinguishing chamber;
the induction disc is fixed on the transmission rod;
the electromagnetic coils are arranged outside the transmission rod at intervals along the axial direction of the transmission rod, and each electromagnetic coil is positioned on the moving path of the induction disc so as to enable the induction disc to sequentially penetrate through the induction disc in the opening and closing process;
the electromagnetic coil control circuits are provided with at least two electromagnetic coils which are connected with each electromagnetic coil in a one-to-one correspondence manner so as to control the electrification and the outage of the electromagnetic coils;
in the switching-on and switching-off process, the electromagnetic coil closest to the induction disc in each electromagnetic coil is electrified and then used for driving the induction disc to move;
in the switching-on and switching-off process, at least one of the electromagnetic coils is an accelerating coil, the accelerating coil is electrified in the front half section through which the induction disc passes, and the rear half section is powered off, so that the induction disc moves under the accelerating force in the front half section through which the induction disc passes, and moves by means of inertia in the rear half section;
in the switching-on and switching-off process, at least one of the electromagnetic coils is a speed reduction coil, the speed reduction coil is powered off in the first half section through which the induction disc passes, and the speed reduction coil is powered on in the second half section, so that the induction disc moves through the first half section of the speed reduction coil by means of inertia, and the induction disc moves through the second half section of the speed reduction coil by means of speed reduction force.
2. The electromagnetic quick mechanism as claimed in claim 1, further comprising a cylinder for fixedly connecting with the arc extinguish chamber, wherein the transmission rod and the induction disc are both disposed in the cylinder, the induction disc is movably guided and matched with the inner wall of the cylinder, and each electromagnetic coil is sleeved outside the cylinder.
3. Electromagnetic snap-action mechanism according to claim 1 or 2, characterized in that the induction disc is fixed at the end of the transmission rod.
4. An electromagnetic speed mechanism according to claim 1 or 2, wherein the solenoid control circuit comprises an energy storage capacitor and a thyristor.
5. An electromagnetic snap mechanism according to claim 1 or 2, wherein there are at least two accelerating coils, the accelerating coils comprising a first accelerating coil for the induction disc to pass first and a second accelerating coil for the induction disc to pass later, the second accelerating coil being energized when the induction disc is about to leave the first accelerating coil.
6. The utility model provides a quick mechanical switch, includes explosion chamber and the moving contact of setting in the explosion chamber, its characterized in that, quick mechanical switch still includes electromagnetism quick mechanism, and electromagnetism quick mechanism includes:
the transmission rod is in transmission connection with the moving contact in the arc extinguishing chamber;
the induction disc is fixed on the transmission rod;
the electromagnetic coils are arranged outside the transmission rod at intervals along the axial direction of the transmission rod, and each electromagnetic coil is positioned on the moving path of the induction disc so as to enable the induction disc to sequentially penetrate through the induction disc in the opening and closing process;
the electromagnetic coil control circuits are provided with at least two electromagnetic coils which are connected with each electromagnetic coil in a one-to-one correspondence manner so as to control the electrification and the outage of the electromagnetic coils;
in the switching-on and switching-off process, the electromagnetic coil closest to the induction disc in each electromagnetic coil is electrified and then used for driving the induction disc to move;
in the switching-on and switching-off process, at least one of the electromagnetic coils is an accelerating coil, the accelerating coil is electrified in the front half section through which the induction disc passes, and the rear half section is powered off, so that the induction disc moves under the accelerating force in the front half section through which the induction disc passes, and moves by means of inertia in the rear half section;
in the switching-on and switching-off process, at least one of the electromagnetic coils is a speed reduction coil, the speed reduction coil is powered off in the first half section through which the induction disc passes, and the speed reduction coil is powered on in the second half section, so that the induction disc moves through the first half section of the speed reduction coil by means of inertia, and the induction disc moves through the second half section of the speed reduction coil by means of speed reduction force.
7. The fast mechanical switch according to claim 6, wherein the electromagnetic fast mechanism further comprises a cylinder fixedly connected with the arc extinguish chamber, the transmission rod and the induction disc are both disposed in the cylinder, the induction disc is movably guided and matched with the inner wall of the cylinder, and each electromagnetic coil is sleeved outside the cylinder.
8. Fast mechanical switch according to claim 6 or 7, characterized in that the sensing disc is fixed at the end of the transmission rod.
9. The fast mechanical switch according to claim 6 or 7, wherein said solenoid control circuit comprises an energy storage capacitor and a thyristor.
10. The fast mechanical switch according to claim 6 or 7, wherein there are at least two accelerating coils, the accelerating coils comprising a first accelerating coil for the first pass of the induction disc and a second accelerating coil for the second pass of the induction disc, the second accelerating coil being energized when the induction disc is about to leave the first accelerating coil.
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| CN202011444315.7A CN112713050A (en) | 2020-12-11 | 2020-12-11 | Electromagnetic quick mechanism and quick mechanical switch |
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