CN104912404A - Cabinet door safety interlock device and method for frequency converter cabinet - Google Patents
Cabinet door safety interlock device and method for frequency converter cabinet Download PDFInfo
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- CN104912404A CN104912404A CN201510208999.3A CN201510208999A CN104912404A CN 104912404 A CN104912404 A CN 104912404A CN 201510208999 A CN201510208999 A CN 201510208999A CN 104912404 A CN104912404 A CN 104912404A
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Abstract
The invention discloses a cabinet door safety interlock device for a frequency converter cabinet. The device comprises a cabinet door lock, a state monitor used for detecting whether a frequency converter is electrified, and a locking device. The invention further discloses a cabinet door safety interlock method for the frequency converter cabinet. The method comprises the steps of electrification judgment, wherein whether the frequency converter is electrified is judged; locking, wherein a cabinet door is locked and can not be open if the frequency converter is electrified. By the adoption of the device, the cabinet door of the frequency converter can be locked when the frequency converter is electrified, an alarm can be given to far-end operation personnel when the cabinet door of the frequency converter is open, and then the safety performance of the frequency converter cabinet is improved greatly.
Description
Technical field
The present invention relates to electrical engineering field, relate to a kind of cabinet door safety interlock for frequency-charger cabinet and method specifically.
Background technology
In modernization high-power frequency conversion application of installation, along with the growth of power of traction motor, the electric pressure controlling the frequency converter of traction electric machine is more and more higher, requirement for personal security operation is also just more and more higher, and in most cases, personnel do not have enough awareness of safety in operation, when also there is high-tension electricity in frequency converter, the cabinet door of random switch frequency-charger cabinet, bring the dual safety hidden danger of personnel and equipment, although have HT pilot now, the visual alerting patterns such as equipment running status warning, personnel can be reminded to note, and equipment is at high-voltage operation, but due to the difference of different personnel's awareness of safety, really cannot accomplish that controllers is not gone to open cabinet door and touched the danger such as high pressure.
For the problems referred to above, the solution usually adopted is interlocked at the cabinet door switch of frequency-charger cabinet and the operating switch of frequency converter.When cabinet door is shut, send instruction frequency converter and possess power-up conditions; When cabinet door of frequency converter is opened in running, then namely send disconnected main circuit order to frequency converter, ensure that cabinet door is opened situation low-converter and stopped at once, isolated high-voltage Danger Electric shock risk since using, can ensure personnel's handling safety.
But, modernization frequency control way generally adopts the frequency conversion speed-adjusting system of friendship-straight-friendship, direct current is become by the AC rectification of electrical network, direct current is by bulky capacitor energy storage, direct current converts the running of alternating current drive motors to by inversion again, due to the energy storage effect of electric capacity, even if the interchange outlet side of frequency converter stops, intermediate DC link still has very high voltage to exist, this just brings great potential safety hazard to personnel, if now operating personnel arbitrarily open cabinet door carry out other operation, will very likely touch affected by high personal safety.
Therefore, for the safety problem of existing frequency-charger cabinet, need a kind of new cabinet door safety interlock for frequency-charger cabinet and method to reach safer control effects.
Summary of the invention
For the safety problem of existing frequency-charger cabinet, the invention provides a kind of cabinet door safety interlock for frequency-charger cabinet, described device comprises:
Cabinet door lock, it is arranged on frequency-charger cabinet, described cabinet door lock is constructed to switch operating state under peripheral operation, the duty of described cabinet door lock comprises closed condition and open mode, and only has the cabinet door of the described frequency-charger cabinet when described cabinet door lock remains on described open mode to be opened;
State monitor, whether it is connected to frequency converter, charged and testing result exported for detecting described frequency converter;
Lock, it to be arranged on described frequency-charger cabinet and to be connected to described state monitor, the duty of described lock comprises lock-out state and released state, described lock is constructed to the described lock when described frequency converter is charged and switches and remain on described lock-out state and described lock switches and remains on described released state when described frequency converter is not charged, and described lock is also constructed to the described cabinet door lock when described lock remains on described lock-out state cannot be switched to described open mode by described closed condition.
In one embodiment, described device also comprises alarm module, and described alarm module is constructed to give the alarm when described cabinet door lock is in described open mode.
In one embodiment, the closed condition of described cabinet door lock comprises locking state and loosening state, wherein:
Described alarm module is also constructed to not give the alarm when described cabinet door lock is in described locking state;
Described alarm module is also constructed to give the alarm when described cabinet door lock is in described loosening state.
Described cabinet door lock is also constructed to switch between described locking state and described loosening state under the effect of described peripheral operation when described lock is in described lock-out state.
In one embodiment, when described lock is in described lock-out state, after described cabinet door lock is switched to described loosening state by described locking state under described peripheral operation, if corresponding described peripheral operation stops, described cabinet door lock automatically reverts to described locking state.
In one embodiment, described cabinet door lock comprises locking plate, and described locking plate is formed between the open position of described cabinet door lock and fastening position and moves, wherein:
When described locking plate is positioned at described fastening position, described cabinet door lock is in locking state;
When described locking plate is positioned at described open position, described cabinet door lock is in open mode;
When described locking plate is between described open position and described fastening position, described cabinet door lock is in loosening state.
In one embodiment, described cabinet door lock also comprises the first fixing axis of rotation of position, described locking plate one end is connected to described first axis of rotation, and described locking plate is constructed to rotate around described first axis of rotation thus realize moving between described open position and described fastening position.
In one embodiment, described lock comprises barrier sheet, and when described frequency converter is charged, described barrier sheet is inserted between described open position and described fastening position, thus stops described locking plate to move to described open position by described fastening position.
In one embodiment, described state monitor comprises electromagnetic coil and magnet, wherein:
Described magnet is connected to described barrier sheet;
Described electromagnetic coil accesses described frequency converter, and when described frequency converter is charged, described electromagnetic coil work attracts described magnet to move, thus drives described barrier sheet to move described barrier sheet is inserted between described open position and described fastening position.
In one embodiment, described alarm module comprises alarm and controls the first feedback switch of described alarm switch, and described first feedback switch is configured to:
Disconnect when described locking plate is positioned at described fastening position;
It is closed when described locking plate is positioned at other positions except described fastening position.
The invention allows for a kind of cabinet door safety interlocking method for frequency-charger cabinet, described method comprises following steps:
Charged determining step, judges that whether frequency converter is charged;
Lock step, if frequency converter is charged, the cabinet door of frequency-charger cabinet is locked, and described cabinet door cannot be opened.
In one embodiment, described method also comprises the first alarming step, gives the alarm to operating personnel when described cabinet door is opened or is in open mode.
In one embodiment, described method also comprises the second alarming step, when described cabinet door is closed and described frequency converter is charged, opens described cabinet Men Shixiang operating personnel give the alarm if any external operation intention.
Compared with prior art, device of the present invention not only can lock cabinet door of frequency converter when frequency converter is charged, but also can when cabinet door of frequency converter is in open mode distally operating personnel give the alarm, thus substantially increase the safe coefficient of frequency-charger cabinet; Meanwhile, attempt to open cabinet door of frequency converter if any people when frequency converter is charged, device of the present invention also can distally operating personnel give the alarm, and which further improves the safe coefficient of frequency-charger cabinet, reduces potential safety hazard.
Further feature of the present invention or advantage will be set forth in the following description.Further, Partial Feature of the present invention or advantage will be become apparent by manual, or be understood by implementing the present invention.Object of the present invention and certain advantages realize by step specifically noted in manual, claims and accompanying drawing or obtain.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for manual, with embodiments of the invention jointly for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is structure diagram according to an embodiment of the invention.
Detailed description of the invention
Embodiments of the present invention are described in detail below with reference to drawings and Examples, enforcement personnel of the present invention whereby can fully understand how application technology means solve technical problem in the present invention, and reach the implementation procedure of technique effect and specifically implement the present invention according to above-mentioned implementation procedure.It should be noted that, only otherwise form conflict, each embodiment in the present invention and each feature in each embodiment can be combined with each other, and the technical scheme formed is all within protection scope of the present invention.
In the prior art, the frequency-charger cabinet cabinet door interlocking mechanism usually adopted is generally directly control interlocking with travel switch.This mode is mainly mounted on cabinet by a travel switch, and when on cabinet door closure, travel switch is pressed into, and closed inside contact, sends instruction frequency converter and possess power-up conditions; When cabinet door of frequency converter opens cabinet door in running, then travel switch is cashier's office in a shop upspring, breaking inner contact, namely frequency converter sends disconnected main circuit order, ensure that cabinet door is opened situation low-converter and stopped at once, isolated high-voltage Danger Electric shock risk since using, can ensure personnel's handling safety.
Although said method ensure that the safety of operating personnel to a certain extent, still there is potential safety hazard in the action of arbitrarily opening cabinet door due to operating personnel, and can cause frequency converter hang-up, thus affect the normal operation of other consumers.
In order to solve the problem, the basis ensureing personal security ensure the continuity that frequency converter runs, the invention provides a kind of cabinet door safety interlocking method for frequency-charger cabinet newly.The cardinal principle of method of the present invention locks cabinet door in frequency converter running or when not discharged cabinet door cannot be opened thus effectively avoid personnel's violation operation.
Based on said method, present invention also offers a kind of cabinet door safety interlock for frequency-charger cabinet.The major function of device of the present invention is the cabinet door locking frequency-charger cabinet when frequency converter runs, thus ensures that operating personnel cannot open cabinet door when frequency converter is charged, and then ensures operator safety.In order to lock cabinet door, first device of the present invention comprises cabinet door lock.Cabinet door lock is arranged on frequency-charger cabinet, and it is constructed to switch operating state under peripheral operation.The duty of cabinet door lock comprises open mode and only has the cabinet door when cabinet door lock remains on open mode to be opened.
In the present embodiment, cabinet door lock constructs based on locking plate, and locking plate is configured to move between two ad-hoc locations of cabinet door lock along fixing motion track.And above-mentioned two ad-hoc locations one are open position, when locking plate moves on open position, cabinet door lock is in open mode; Another is fastening position, when locking plate move to fastening position or between open position and fastening position time cabinet door lock be in closed condition.When cabinet door lock is in closed condition, cabinet door cannot normally be opened.Cabinet door lock sheet closes handle with opening on cabinet door to link, and the handle of the switch gate namely on cabinet door is connected to the locking plate on door by mechanical linkage which controls, control its switch.Handle on operation cabinet door is opened, and locking plate is just opened; Handle on operation cabinet door is closed, and locking plate is just closed.
In the present embodiment, cabinet door lock comprises locking plate and axis of rotation.As shown in Figure 1, solid-line rectangle 111 represents locking plate, and its one end is connected to axis of rotation 110, and axis of rotation 110 is fixedly installed on frequency-charger cabinet.Locking plate 111 is constructed to rotate around axis of rotation 110 thus forms a fan-shaped motion track.Dashed rectangle 113 represent locking plate 111 in rotary moving time fan-shaped motion track a final position, solid-line rectangle 111 represent locking plate 111 in rotary moving time fan-shaped motion track another final position.Namely locking plate 111 is constructed to axis of rotation 110 for axle, moves between position 111 and 113.
In the present embodiment, locking plate 111 is in the external movement that rotates by operation.Only have when locking plate 111 moves to 113 place, position, cabinet door lock is in open mode, and now cabinet door can normally be opened.When locking plate 111 moves to position 111 place or between position 111 and position 113 during optional position, cabinet door lock is in closed condition, and cabinet door cannot normally be opened.
Cabinet door lock of the present invention can lock cabinet door makes it not be opened, and for ensureing safety, can not open frequency converter when cabinet door lock is in open mode.But current most of frequency converter is opened in operated from a distance by remote server.In order to the duty that the operating personnel of remote server can be allowed to understand cabinet door lock, complete frequency converter power on before automatic inspection.Device of the present invention constructs alarm module.Alarm module is constructed to give the alarm when cabinet door lock is in open mode.
For improving safe coefficient further, in the present embodiment, the closed condition of cabinet door lock is divided into locking state and loosening state.When cabinet door lock is in locking state, namely locking plate moves to fastening position completely, and cabinet door cannot be opened.When cabinet door is in loosening state, time namely between the in the closed position and open position of locking plate, although the locked cabinet door of locking plate, cabinet door cannot be opened, and because locking plate does not put in place completely, still there is potential safety hazard.
In order to remind operating personnel's cabinet door to be in loosening state, alarm module is also constructed to give the alarm when cabinet door lock is in loosening state.Namely in the present embodiment, when locking plate departs from fastening position, namely alarm gives the alarm.
Specific to the present embodiment, alarm module comprises alarm 160 and controls the feedback switch 150 of alarm switch.Alarm 160 and feedback switch 150 are connected in series to power supply 101.Feedback switch 150 is connected by link gear (representing with the dotted line in Fig. 1 between 113 with feedback switch 150) with locking plate 111, and it is configured to disconnect when locking plate 111 is positioned at position 111.Like this, when locking plate 111 is positioned at position 111, when namely cabinet door lock is in closed condition, feedback switch 150 disconnects, and alarm 160 power-off does not work, thus operating personnel are learnt, and cabinet door lock is in closed condition, and cabinet door cannot be opened, and frequency converter can start.When locking plate 111 disengaging configuration 111 between position 111 and position 113 or position 113 time, namely when cabinet door lock is in loosening state or open mode, feedback switch 150 closes, alarm 160 works, thus cabinet door lock has been in loosening state or open mode to make operating personnel learn, frequency converter cannot start.
In the present embodiment, travel switch is utilized to construct feedback switch 150.When locking plate is in position 111, travel switch is pushed down by locking plate, and on travel switch, (feedback switch 150) disconnects; And when any position of locking plate beyond position 111 (between position 111 and position 113 or position 113), now locking plate all cannot push down travel switch, constant close contact on travel switch (feedback switch 150) closes, and this alarm is sent
Further, in the present embodiment, alarm lamp structure alarm 160 is adopted.In another embodiment of the invention, alarming horn also can be adopted to make structure alarm.
In order to limit the duty of cabinet door lock, thus reach the object locking cabinet door when frequency converter runs, device of the present invention also comprises lock.Lock is arranged on frequency-charger cabinet, and its duty comprises lock-out state and released state.Lock is constructed to the cabinet door lock when lock remains on lock-out state cannot be switched to open mode.That is, when lock remains on lock-out state, even if apply peripheral operation on cabinet door lock, cabinet door lock also cannot be made to transform to open mode by closed condition.
In order to realize the function of above-mentioned lock, lock comprises barrier sheet, and when lock is in the lock state, barrier sheet is inserted in the motion track of locking plate, thus the movement of restriction locking plate, make cabinet door lock cannot transform to open mode by closed condition.
Specific in the present embodiment, as shown in Figure 1, solid-line rectangle 141 represents barrier sheet, and its one end is connected to axis of rotation 140, and axis of rotation 140 is fixedly installed on frequency-charger cabinet.Barrier sheet 141 is constructed to rotate around axis of rotation 140 thus forms a fan-shaped motion track.Dashed rectangle 143 represent barrier sheet 141 in rotary moving time fan-shaped motion track a final position, solid-line rectangle 141 represent barrier sheet 141 in rotary moving time fan-shaped motion track another final position.Namely barrier sheet 141 is constructed to axis of rotation 140 for axle, moves between position 141 and 143.
As shown in the figure, when barrier sheet 141 moves to the ad-hoc location near position 143 place or position 143, it is just in time arranged in the fan-shaped motion track of locking plate 111.So just can hinder the movement of locking plate 111.Such as, when locking plate 111 is positioned at 111 place, position, barrier sheet 141 moves to position 143 place, now barrier sheet 141 is just in time positioned on locking plate 111 motion track, if now barrier sheet 141 position is fixed, so locking plate 111 also cannot move, thus reaches and stop locking plate 111 to move to object on position 113.
When cabinet door lock is in closed condition, cabinet door cannot be opened, and now starts frequency converter, then lock enters lock-out state, makes peripheral operation cabinet door lock cannot be transformed to open mode by closed condition, thus ensure that use safety.But attempting when frequency converter runs to open cabinet door is very dangerous operation, the operating personnel of operated from a distance end are necessary to have learnt that people attempts when frequency converter runs to open cabinet door.
In order to remind the operating personnel of operated from a distance end to have people to attempt when frequency converter runs to open cabinet door, device of the present invention constructs cabinet door lock especially.The closed condition of cabinet door lock of the present invention comprises locking state and loosening state, wherein:
Alarm module is constructed to not give the alarm when cabinet door lock is in locking state;
Alarm module is constructed to give the alarm when cabinet door lock is in loosening state;
Cabinet door lock is constructed to switch between locking state and loosening state under the effect of peripheral operation when lock is in the lock state.
Specifically, namely when cabinet door lock is in locking state, alarm module does not give the alarm, and now the operating personnel of operated from a distance end can start frequency converter.After frequency converter starts, lock enters lock-out state.Also cabinet door lock cannot be made to be switched to open mode by closed condition even if now carry out peripheral operation (attempting to open cabinet door) to cabinet door lock.But peripheral operation now can make cabinet door lock switch between locking state and loosening state.When cabinet door lock is switched to loosening state by locking state, alarm module gives the alarm, and reminds the operating personnel of operated from a distance end to have people to attempt when frequency converter runs to open cabinet door.
Specific to the present embodiment, be then that cabinet door lock is in locking state when locking plate is positioned at fastening position, when when locking plate is between open position and fastening position, cabinet door lock is in loosening state.As shown in Figure 1, when locking plate 111 is in position 111, cabinet door lock is in locking state, and when locking plate 111 is in optional position between position 111 and position 113, cabinet door lock is in loosening state.
In order to make the cabinet door lock when lock enters lock-out state can only switch between locking state and loosening state, corresponding improvement also done by the lock of this enforcement.The cabinet door lock (between open position and fastening position) on the running orbit of locking plate of the present embodiment sets an ad-hoc location (the first ad-hoc location).When barrier sheet restriction locking plate is moved to open position by fastening position, locking plate can only arrive the first ad-hoc location by fastening position farthest and locking plate moves freely under peripheral operation between fastening position and the first ad-hoc location in the process of open position movement, and the first ad-hoc location is between fastening position and open position.
As shown in Figure 1, the position representated by dotted line frame 112 is the first ad-hoc location of the present embodiment cabinet door lock.When lock enters lock-out state, locking plate 111 can only move to post-11.2 by position 111 under the effect of peripheral operation, can not continue to further move to position 113.For realizing above-mentioned effect, the barrier sheet 141 of the present embodiment is constructed to, and when lock enters lock-out state, barrier sheet can only move between position 143 in position 142.
When lock enters lock-out state, barrier sheet 141 is first positioned at position 143 place and locking plate 111 is positioned at position 111 place.(attempt to make cabinet door lock be transformed into open mode) if now peripheral operation is applied on locking plate 111, locking plate 111 is mobile from position 111 (fastening position) to position 113 (open position).Locking plate 111 drives the barrier sheet 141 limiting its movement to move together, and the motion track of barrier sheet 141 is from position 143 to position 141.When barrier sheet 141 moves to position 142 by position 143, because lock enters lock-out state, therefore barrier sheet 141 cannot continue mobile, thus locking plate 111 is blocked in post-11.2.Now feedback switch 150 closes, and alarm lamp 160 works luminescence, reminds the operating personnel of operated from a distance end to have people to attempt when frequency converter runs to open cabinet door.Meanwhile, because locking plate 111 is blocked in post-11.2, cabinet door lock is in loosening state (being still in closed condition), and the cabinet door of frequency-charger cabinet cannot be opened.
In so avoiding and be opened when frequency converter runs charged at frequency-charger cabinet, reminded again the operating personnel of operated from a distance end to there occurs violation operation simultaneously, made the operating personnel of operated from a distance end take corresponding safety measure as early as possible.
Cabinet door safety interlock of the present invention can utilize lock to lock cabinet door lock when frequency converter runs, thus cabinet door cannot be opened.In order to reduce the potential safety hazard that people is maloperation further, device of the present invention can automatically lock cabinet door lock when frequency converter runs.Whether, for realizing above-mentioned functions, device of the present invention constructs state monitor, and it is connected to frequency converter, charged and testing result exported for detecting frequency converter.Lock of the present invention is connected to state monitor, when state monitor monitor frequency converter be in running status time, lock is according to the output of state monitor locking cabinet door lock.
Because modernization frequency control way generally adopts the frequency conversion speed-adjusting system of friendship-straight-friendship, direct current is become by the AC rectification of electrical network, direct current is by bulky capacitor energy storage, direct current converts the running of alternating current drive motors to by inversion again, due to the energy storage effect of electric capacity, even if the interchange outlet side of frequency converter stops, intermediate DC link still has very high voltage to exist, this just brings great potential safety hazard to personnel, if now operating personnel arbitrarily open cabinet door carry out other operation, will very likely touch affected by high personal safety.
For these reasons, in the present embodiment, state monitor is not only monitored frequency converter and whether is in running status, but also whether monitoring frequency converter is charged.Only have frequency converter out of service and frequency converter discharge off (not charged), just can unlock cabinet door lock.
Specifically, the state monitor of the present embodiment comprises electromagnetic coil and magnet.Electromagnetic coil access frequency converter, when frequency converter runs or be charged, electromagnetic coil inside has electric current to pass through, and electromagnetic coil voltage is more than the under-voltage threshold value of setting, and electromagnetic coil produces magnetic force and attracts magnet to move.Magnet is connected to barrier sheet (barrier sheet and magnet are also by mechanical connection interlock), and namely magnet moves certain angle, then barrier sheet is by link gear and then mobile certain angle (angle can need to regulate according to actual design).Magnet moves thus drives barrier sheet to move and barrier sheet is inserted between the open position of cabinet door lock and fastening position.
In the present embodiment, electromagnetic coil is connected to monitored intermediate dc loop, thus whether detect frequency converter charged.Certain, the structure of device of the present invention is not limited to this.In other embodiments of the present invention, electromagnetic coil can be connected to arbitrary in frequency converter may with on the circuit of high pressure, whether charged with Monitoring Line.Consider that in frequency converter, multiple component part has charged possibility, in another embodiment of the invention, electromagnetic coil is connected in frequency converter likely with on the circuit of high pressure.And be configured to arbitrary circuit band high pressure and all can trigger electromagnetic coil work.
The movement of corresponding locking plate, magnet is formed between the latched position of state monitor and unlocked position and moves, wherein:
When magnet is positioned at latched position, lock is in the lock state;
When magnet is positioned at unlocked position, lock is in released state.
As shown in Figure 1, state monitor comprises electromagnetic coil 120, magnet 131 and fixing axis of rotation 130.Magnet 131 is connected to axis of rotation 130 and is configured to move between position 131 and position 133 around axis of rotation 130.Electromagnetic coil 120 is connected to frequency converter 100, and when frequency converter 100 charged (but be in running status or run and stop not discharging completely), electromagnetic coil 120 is energized, and produces magnetic force and attracts magnet 131 to be rotated in place 133 places around axis of rotation 130.
In the present embodiment, magnet 131 is connected by link gear (representing with the dotted line between magnet in Fig. 1 131 with barrier sheet 141) with barrier sheet 141.When magnet 131 is rotated in place 133 around axis of rotation 130 by position 131, it drives barrier sheet 141 to move to position 143 by position 141.
When normally working, cabinet door closure state low-converter just can be energized, and therefore when normally working, if electromagnetic coil energising, the position so residing for locking plate 111 should be position 111.Namely now barrier sheet 141 moves to position 143, just in time contacts with the locking plate 111 at position 111 place, is blocked in the front that locking plate 111 moves to position 113.
Meanwhile, the state monitor of the present embodiment is also configured with magnet positions limiter.When electromagnetic coil 120 energising makes magnet 131 move to position 133, magnet positions limiter starts, and the movement of restriction magnet 131, makes magnet 131 can only move between position 133 and position 132.If namely peripheral operation is applied on locking plate 111, locking plate 111 is moved to position 113 from position 111, so it drives barrier sheet 141 to move from position 143 to position 141, and then band moving magnet 131 moves from position 133 to position 131.When magnet 131 moves to position 132, it can not continue to move to position 131 under the restriction of magnet positions limiter, also just stops barrier sheet 141 in position 142, thus stops locking plate 111 at post-11.2.
When electromagnetic coil 120 no power, magnet positions limiter quits work, and magnet 131 can arbitrarily movement between position 133 and position 131, and namely locking plate 111 can not stoped by barrier sheet 141 by the movement of position 111 to position 113.
In the present embodiment, the mechanical switch utilizing relay and be connected with relay constructs magnet positions limiter.Relay access frequency converter, when frequency converter runs or be charged, Control mechanical switch is opened, and the mechanical locking plate of mechanical switch enters 132 positions of the running orbit of magnet 131, make magnet terminate in 132 positions at 131 to 133 rotary courses, 133 positions cannot be reached; And when frequency converter is not charged, mechanical switch is closed, the mechanical locking plate of mechanical switch does not enter within the scope of the running orbit of magnet 131, does not namely limit magnet 131 position.
It is pointed out that the device of the present embodiment is when lock is in the lock state here, after cabinet door lock is switched to loosening state by locking state under peripheral operation, if corresponding peripheral operation stops, cabinet door lock automatically reverts to locking state.Like this after peripheral operation stops, alarm 160 also can quit work thereupon, thus reminds operating personnel's violation operation to stop.
Specific to Fig. 1, be namely be in the lock state when lock, so magnet 131 is positioned at position 133, and barrier sheet 141 is positioned at position 143, and locking plate 111 is positioned at position 111.Now as attempted to open cabinet door, then peripheral operation puts on locking plate 111 and moves it.When locking plate 111 leaves position 111, feedback switch 150 closes, and alarm 160 works.Simultaneously when locking plate 111 moves to post-11.2, it drives barrier sheet 141 to move to position 142, and then band moving magnet 131 moves to position 132.Magnet 131 is blocked in position 132 by magnet positions limiter, thus makes locking plate 111 be blocked in post-11.2, and then stops cabinet door to be opened.
When peripheral operation stops, the magnet 131 at position 132 place is automatically moved to position 133 under the attraction of electromagnetic coil 120, and drive barrier sheet 141 to move to position 143, barrier sheet 141 drives locking plate 111 to move to position 111.Feedback switch 150 disconnects, and alarm 160 quits work.
In the present embodiment, magnet 131 is also configured with back-moving spring.When not having electric current to pass through in electromagnetic coil 120, when namely frequency converter 100 is not charged, magnet 131 is automatically moved to position 131 place based on back-moving spring, drives barrier sheet 141 to move to position 141 place, thus is convenient to the movement of locking plate 111.
The invention allows for a kind of cabinet door safety interlocking method for frequency-charger cabinet, it comprises following steps:
Charged determining step, judges that whether frequency converter is charged;
Lock step, if frequency converter is charged, cabinet door is locked, and cabinet door cannot be opened.
In order to improve safe coefficient further, method of the present invention also comprises the first alarming step, gives the alarm to operating personnel when cabinet door is opened or be in open mode.Operating personnel so just can be reminded to take associative operation (not starting frequency converter when such as, finding that cabinet door is opened).
Method of the present invention also comprises the second alarming step, when cabinet door is closed and frequency converter is charged, opens cabinet Men Shixiang operating personnel give the alarm if any external operation intention.Comprehensive first alarming step and the second alarming step, namely be judge cabinet door whether locked (cabinet door lock all goes out of lock state under external operation when cabinet door is in open mode or have external operation to attempt to open cabinet door, all being considered as cabinet door does not have locked), when cabinet door not by locked time give the alarm to operating personnel.
To sum up, compared with prior art, device and method of the present invention not only can lock cabinet door of frequency converter when frequency converter is charged, but also can when cabinet door of frequency converter is in open mode distally operating personnel give the alarm, thus substantially increase the safe coefficient of frequency-charger cabinet; Meanwhile, attempt to open cabinet door of frequency converter if any people when frequency converter is charged, device and method of the present invention can distally operating personnel give the alarm, and which further improves the safe coefficient of frequency-charger cabinet, reduces potential safety hazard.
Although embodiment disclosed in this invention is as above, the embodiment that described content just adopts for the ease of understanding the present invention, and be not used to limit the present invention.Method of the present invention also can have other various embodiments.When not deviating from essence of the present invention, those of ordinary skill in the art are when making various corresponding change or distortion according to the present invention, but these change accordingly or are out of shape the protection domain that all should belong to claim of the present invention.
Claims (12)
1., for a cabinet door safety interlock for frequency-charger cabinet, described device comprises:
Cabinet door lock, it is arranged on frequency-charger cabinet, described cabinet door lock is constructed to switch operating state under peripheral operation, the duty of described cabinet door lock comprises closed condition and open mode, and only has the cabinet door of the described frequency-charger cabinet when described cabinet door lock remains on described open mode to be opened;
State monitor, whether it is connected to frequency converter, charged and testing result exported for detecting described frequency converter;
Lock, it to be arranged on described frequency-charger cabinet and to be connected to described state monitor, the duty of described lock comprises lock-out state and released state, described lock is constructed to the described lock when described frequency converter is charged and switches and remain on described lock-out state and described lock switches and remains on described released state when described frequency converter is not charged, and described lock is also constructed to the described cabinet door lock when described lock remains on described lock-out state cannot be switched to described open mode by described closed condition.
2. device according to claim 1, is characterized in that, described device also comprises alarm module, and described alarm module is constructed to give the alarm when described cabinet door lock is in described open mode.
3. device according to claim 2, is characterized in that, the closed condition of described cabinet door lock comprises locking state and loosening state, wherein:
Described alarm module is also constructed to not give the alarm when described cabinet door lock is in described locking state;
Described alarm module is also constructed to give the alarm when described cabinet door lock is in described loosening state.
Described cabinet door lock is also constructed to switch between described locking state and described loosening state under the effect of described peripheral operation when described lock is in described lock-out state.
4. device according to claim 3, it is characterized in that, when described lock is in described lock-out state, after described cabinet door lock is switched to described loosening state by described locking state under described peripheral operation, if corresponding described peripheral operation stops, described cabinet door lock automatically reverts to described locking state.
5. device according to claim 4, is characterized in that, described cabinet door lock comprises locking plate, and described locking plate is formed between the open position of described cabinet door lock and fastening position and moves, wherein:
When described locking plate is positioned at described fastening position, described cabinet door lock is in locking state;
When described locking plate is positioned at described open position, described cabinet door lock is in open mode;
When described locking plate is between described open position and described fastening position, described cabinet door lock is in loosening state.
6. device according to claim 5, it is characterized in that, described cabinet door lock also comprises the first fixing axis of rotation of position, described locking plate one end is connected to described first axis of rotation, and described locking plate is constructed to rotate around described first axis of rotation thus realize moving between described open position and described fastening position.
7. device according to claim 5, it is characterized in that, described lock comprises barrier sheet, and when described frequency converter is charged, described barrier sheet is inserted between described open position and described fastening position, thus stops described locking plate to move to described open position by described fastening position.
8. device according to claim 7, is characterized in that, described state monitor comprises electromagnetic coil and magnet, wherein:
Described magnet is connected to described barrier sheet;
Described electromagnetic coil accesses described frequency converter, and when described frequency converter is charged, described electromagnetic coil work attracts described magnet to move, thus drives described barrier sheet to move described barrier sheet is inserted between described open position and described fastening position.
9. device according to claim 5, is characterized in that, described alarm module comprises alarm and controls the first feedback switch of described alarm switch, and described first feedback switch is configured to:
Disconnect when described locking plate is positioned at described fastening position;
It is closed when described locking plate is positioned at other positions except described fastening position.
10., for a cabinet door safety interlocking method for frequency-charger cabinet, it is characterized in that, described method comprises following steps:
Charged determining step, judges that whether frequency converter is charged;
Lock step, if frequency converter is charged, the cabinet door of frequency-charger cabinet is locked, and described cabinet door cannot be opened.
11. methods according to claim 10, is characterized in that, described method also comprises the first alarming step, give the alarm to operating personnel when described cabinet door is opened or is in open mode.
12. methods according to claim 10, is characterized in that, described method also comprises the second alarming step, when described cabinet door is closed and described frequency converter is charged, open described cabinet Men Shixiang operating personnel give the alarm if any external operation intention.
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| CN201510208999.3A CN104912404B (en) | 2015-04-28 | 2015-04-28 | A kind of cabinet door safety interlock for frequency-charger cabinet |
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| CN201510208999.3A CN104912404B (en) | 2015-04-28 | 2015-04-28 | A kind of cabinet door safety interlock for frequency-charger cabinet |
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| CN104912404B CN104912404B (en) | 2017-06-13 |
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| CN106376195A (en) * | 2016-09-30 | 2017-02-01 | 湘潭电机股份有限公司 | Electrical cabinet door lock |
| CN108749822A (en) * | 2018-05-28 | 2018-11-06 | 中车株洲电力机车有限公司 | Rail vehicle screen cabinet and rail vehicle |
| CN110783985A (en) * | 2019-11-05 | 2020-02-11 | 中车大连机车车辆有限公司 | Diesel locomotive and intermediate direct current loop isolation system and method thereof |
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|---|---|
| CN104912404B (en) | 2017-06-13 |
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