CN103259398B - Flameproof type frequency conversion box capacitor bank discharging blocking device - Google Patents
Flameproof type frequency conversion box capacitor bank discharging blocking device Download PDFInfo
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- CN103259398B CN103259398B CN201310132941.6A CN201310132941A CN103259398B CN 103259398 B CN103259398 B CN 103259398B CN 201310132941 A CN201310132941 A CN 201310132941A CN 103259398 B CN103259398 B CN 103259398B
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- frequency conversion
- latch shaft
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- fail secure
- magnetic switch
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Abstract
The invention discloses a flameproof type frequency conversion box capacitor bank discharging blocking device which comprises a capacitor bank, a blocking shaft which is arranged on an installing frame and gets in and gets out in a spiral mode and an outage blocking button triggered by the blocking shaft. The outage blocking button controls energizing and outage of a main power supply of a frequency conversion box and deblocking and blocking of a quick opening mechanism. The flameproof type frequency conversion box capacitor bank discharging blocking device is characterized in that the flameproof type frequency conversion box capacitor bank discharging blocking device further comprises a discharging resistor and a magnet switch, wherein the discharging resistor and the magnet switch are connected with the capacitor bank to form a quick discharging circuit; the magnet switch is fixed on the installing frame, the blocking shaft is fixed with a rotating element which synchronously rotates with the blocking shaft, and the rotating element is fixed with a magnetic block used for driving the magnet switch to act to be connected with the qucik discharging circuit. The defect that an existing outage blocking device cannot carry out discharging on a capacitor bank of a frequency conversion box compulsively is overcome, and using safety and reliability of the flameproof type frequency conversion box are greatly improved.
Description
Technical field
the present invention relates to a kind of explosion-proof frequency conversion case safety guard, be specifically related to a kind of explosion-proof frequency conversion case capacitor set discharge locking device.
Background technology
there is clear stipulaties in standard GB/T 3836.1 " explosive atmosphere part 1: Device-General requires ", require to have the Warning board of " power-off is after 15 minutes " and " forbid charged uncapping " on explosion-proof frequency conversion case chamber door.For meeting Standard, traditional explosion-proof frequency conversion case, chamber door is provided with fail secure device, and the latch shaft that this device is retreated by a spiral drives fail secure button actions, and fail secure button then controls unblock and the locking of main power source power on/off and quick opening mechanism simultaneously.When latch shaft is positioned at initial condition, fail secure button is failure to actuate, main power source not power-off, and quick opening mechanism is also in blocking and chamber door cannot be opened; When latch shaft precession put in place press fail secure button time, primary power source de-energizes, simultaneously quick opening mechanism lock release makes it can open (during practical operation, if precession does not put in place, then first power-off, more deeply separate door lock along with precession, exists precedence relationship).
arrange when the main purpose of " power-off is after 15 minutes " warning mark is and prevents frequency converter DC circuit Capacitor banks non-discharge off and open chamber door, injure equipment and personal safety.But still there are two potential safety hazards in this way.One, in this traditional way, the electric discharge of the inner DC capacitor of frequency converter belongs to nature electric discharge, does not take forced electric discharge measure.When naturally discharging, transducer power is larger, and discharge time is longer; Capacitor is longer for service life, and the velocity of discharge is slower; The capacitor discharge time constant of different brands is also not quite similar.Therefore, this way, there is very large uncertainty the discharge time for dissimilar frequency converter, causes user well cannot judge Capacitor banks whether discharge off when operating.They are two years old, because current door-opening mechanism all adopts quick operating valve technology, opening time was the rank of several seconds, be actually and allow user to open chamber door when non-discharge off, like this once operating personnel are not in accordance with code operation, open chamber door when non-discharge off, there is great security risk.
Summary of the invention
the present invention seeks to: for overcoming the defect that existing fail secure device cannot be forced to discharge to the Capacitor banks of frequency conversion box, and a kind of explosion-proof frequency conversion case capacitor set discharge locking device is provided, it adds forced electric discharge loop and the associated trigger mechanism of Capacitor banks on original fail secure device basic, allow user can carry out repid discharge to Capacitor banks when power-off unlocks, greatly improve safety in utilization and the reliability of explosion-proof frequency conversion case.
technical scheme of the present invention is: a kind of explosion-proof frequency conversion case capacitor set discharge locking device, comprise Capacitor banks, be located at the latch shaft that spiral on installing rack is retreated and the fail secure button triggered by described latch shaft, described fail secure button controls the power on/off of frequency conversion box main power source and the unblock of quick opening mechanism and locking simultaneously; Characterized by further comprising the discharge resistance and magnetic switch that connect and compose repid discharge loop with Capacitor banks, described magnetic switch is fixed on installing rack, described latch shaft being fixed with the rotating member with its synchronous rotary simultaneously, described rotating member being fixed with for driving described magnetic switch action to connect the magnetic patch in repid discharge loop.
further, installing rack described in the present invention comprises base, support, latch receptacles and locking axle sleeve; Base one end fixed latch seat, and other end fixed support, described latch receptacles has axis hole, one end interference fit that described axis hole is adjacent with base is fixed with locking axle sleeve, described latch shaft is through described axis hole coordinating with the inner hole thread of locking axle sleeve, and described base is provided with the perforate confession described latch shaft corresponding with the endoporus of locking axle sleeve and stretches out simultaneously; Described fail secure button is fixed on support, and positioned opposite with one end of described latch shaft protuberate basic unit perforate; Described magnetic switch is also fixed on the bracket.
further, one end radial direction relative with fail secure button of latch shaft described in the present invention is provided with jump-ring slot, fix the jump ring had for carrying out axial limiting to latch shaft in described jump-ring slot, and the other end of latch shaft stretches out described latch receptacles and form the boss for axial limiting.
further, rotating member described in the present invention is disk, and described magnetic patch is fixed in the card of disk, and described magnetic switch is positioned at the front of described magnetic patch.
further, disk described in the present invention is by flat head screw and some pad axial lockings in described latch shaft one end relative with fail secure button, and described pad is for regulating the axial spacing of magnetic patch and magnetic switch.
the present invention is when reality is implemented, and Capacitor banks wherein, discharge resistance and magnetic switch repid discharge loop in series, the connection of its concrete circuit is well known to those skilled in the art.What described magnetic switch adopted is conventional normally opened contact formula magnetic switch, and be mainly used in the break-make controlling repid discharge loop, namely when magnetic switch is not operating, Capacitor banks does not seal in discharge resistance, cannot form loop electric discharge.When magnetic patch induced magnetism switch makes it action, the closing of contact, makes Capacitor banks seal in discharge resistance, connects loop and discharges.
the fail secure button related in the present invention is prior art, and it controls unblock and the locking of frequency conversion box main power source power on/off and quick opening mechanism simultaneously.And as the prior art, during practical operation, if latch shaft precession does not put in place, then first power-off, then unlock quick opening mechanism along with going deep into of precession, there is precedence relationship.Before unlocking in order to ensure quick opening mechanism, electric discharge is carried out to Capacitor banks complete, promote safety in utilization, solution of the present invention is as follows: the stroke that described latch shaft triggers fail secure button actions cut-out primary power source de-energizes is A, the stroke that described latch shaft triggers fail secure button actions unblock quick opening mechanism is B, and the stroke of latch shaft is C during described magnetic patch driving magnetic switch action connection repid discharge loop, described A≤C < B.
advantage of the present invention is:
1. the present invention allows user can carry out repid discharge to Capacitor banks when power-off unlocks, overcome the defect that existing fail secure device cannot be forced to discharge to the Capacitor banks of frequency conversion box, substantially increase safety in utilization and the reliability of explosion-proof frequency conversion case.
2. the present invention is on original fail secure device basic, add Capacitor banks forced electric discharge loop and associated trigger mechanism, and transformation is convenient, and structure is simple, and production cost is low, easy and simple to handle, has very high practicality.
Accompanying drawing explanation
below in conjunction with drawings and Examples, the invention will be further described:
fig. 1 is structural front view of the present invention;
fig. 2 is that the A-A of Fig. 1 is to cutaway view;
fig. 3 is the right view of Fig. 1.
wherein: 1 latch shaft; 2 latch receptacles; 3 bases; 4 supports; 5 fail secure buttons; 6 magnetic switchs; 7 magnetic patch; 8 disks; 9 flat head screws; 10 pads; 11 jump rings; 12 locking axle sleeves; 13 boss.
Embodiment
embodiment: shown in composition graphs 1 ~ Fig. 3, this explosion-proof frequency conversion case capacitor set discharge locking device provided by the invention is the improvement made on the basis of the explosion-proof frequency conversion case fail secure device of routine, and it is specifically made up of latch shaft 1, latch receptacles 2, base 3, support 4, fail secure button 5, magnetic switch 6, magnetic patch 7, disk 8, flat head screw 9, pad 10, jump ring 11, locking axle sleeve 12, boss 13, Capacitor banks (not shown in FIG.) and discharge resistance (not shown in FIG.) these parts.
the one end of base 3 described in the present embodiment fixed latch seat 2, and other end fixed support 4, described latch receptacles 2 has axis hole, one end interference fit that described axis hole is adjacent with base 3 is fixed with locking axle sleeve 12(locking axle sleeve 12 and knocks in axis hole), described latch shaft 1 is through described axis hole and coordinate with the inner hole thread of locking axle sleeve 12 that (inner hole refined of locking axle sleeve 12 twists out internal thread, and latch shaft 1 is milled with the external screw thread with screw-internal thread fit), simultaneously described base 3 is provided with the perforate corresponding with the endoporus of locking axle sleeve 12 for described latch shaft 1 and stretches out; Described fail secure button 5 is fixed on support 4, and positioned opposite with one end of described latch shaft 1 protuberate basic unit 3 perforate.Namely the same with routine techniques, described latch shaft 1 spiral is retreated to trigger fail secure button 5, and described fail secure button 5 controls the power on/off of frequency conversion box main power source and the unblock of quick opening mechanism (not shown in FIG.) and locking simultaneously.
one end radial direction relative with fail secure button 5 of latch shaft 1 described in the present embodiment is provided with jump-ring slot, fix the jump ring 11 had for carrying out axial limiting to latch shaft 1 in described jump-ring slot, and the other end of latch shaft 1 stretches out described latch receptacles 2 and form the boss 13 for axial limiting.Jump ring 11 and boss 13 coordinate and carry out axial limiting to the spiral of latch shaft 1.
capacitor banks, discharge resistance and magnetic switch 6 repid discharge loop in series in the present embodiment, described magnetic switch 6 is conventional normally opened contact formula magnetic switch, and it is fixed on support 4, for controlling the break-make in repid discharge loop.Disk 8 described in the present embodiment is by flat head screw 9 and some pad 10 axial lockings in described latch shaft 1 one end relative with fail secure button 5, therefore when latch shaft 1 precession, disk 8 can with its synchronous rotary.As shown in Figure 1 and Figure 2, in the present embodiment disk 8 left side card (card towards fail secure button 5) on be fixed for driving the action of described magnetic switch 6 to connect the magnetic patch 7 in repid discharge loop.Described magnetic switch 6 is positioned at the position on the lower, front of magnetic patch 7.Described pad 10 is for regulating the axial spacing of magnetic patch 7 and magnetic switch 6, and its concrete usage quantity is determined according to actual conditions certainly, employs three pieces of pads 10 in the present embodiment.
composition graphs 1 ~ Fig. 3, during specific works: when latch shaft 1 is rotated counterclockwise on earth, the boss 13 of latch shaft 1 is in outermost position, makes quick opening mechanism be in locked position of coupler.When latch shaft 1 is rotated clockwise to assigned address, fail secure button 5 action, primary power source de-energizes.When latch shaft 1 is rotated clockwise to assigned address further, fail secure button 5 action keeps, and magnetic patch 7 responds to the action of driving magnetic switch 6, connects discharge resistance, to Capacitor banks forced electric discharge; Latch shaft 1 is rotated clockwise to assigned address stroke further and terminates, and now the boss 13 of latch shaft 1 is in and leans on inner position (being also position shown in Fig. 1, Fig. 2) most, quick opening mechanism is in the unlocked position, allows to open chamber door.Namely in the design of the present embodiment, supposing described latch shaft 1 to trigger fail secure button 5 action, to cut off the stroke of primary power source de-energizes be A, the stroke that described latch shaft 1 triggers fail secure button 5 action unblock quick opening mechanism is B, and described magnetic patch 7 drive magnetic switch 6 action connect repid discharge loop time latch shaft 1 stroke be C, described A < C < B.The object of such design is complete in order to ensure carrying out electric discharge to Capacitor banks before quick opening mechanism unblock, promotes safety in utilization.
adopt high voltage withstand class magnetic switch 6 in the present invention, voltage withstand class is applicable to 1140V and with low-converter.When magnetic switch 6 action, normally opened contact closes, and Capacitor banks seals in discharge resistance, repid discharge.In present case, discharge resistance makes the repid discharge in 2S of direct current capacitor group complete.
above embodiment is only the present invention's a kind of execution mode wherein, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (6)
1. an explosion-proof frequency conversion case capacitor set discharge locking device, comprise Capacitor banks, be all located at the latch shaft (1) that spiral on installing rack is retreated and the fail secure button (5) triggered by described latch shaft (1), described fail secure button (5) controls the power on/off of frequency conversion box main power source and the unblock of quick opening mechanism and locking simultaneously; Characterized by further comprising the discharge resistance and magnetic switch (6) that connect and compose repid discharge loop with Capacitor banks, described magnetic switch (6) is fixed on installing rack, described latch shaft (1) being fixed with the rotating member with its synchronous rotary simultaneously, described rotating member being fixed with for driving described magnetic switch (6) action to connect the magnetic patch (7) in repid discharge loop.
2. explosion-proof frequency conversion case capacitor set discharge locking device according to claim 1, is characterized in that described installing rack comprises base (3), support (4), latch receptacles (2) and locking axle sleeve (12); Base (3) one end fixed latch seat (2), and other end fixed support (4), (2) have axis hole to described latch receptacles, one end interference fit that described axis hole is adjacent with base (3) is fixed with locking axle sleeve (12), described latch shaft (1) is through described axis hole and coordinate with the inner hole thread of locking axle sleeve (12), and described base (3) is provided with the perforate corresponding with the endoporus of locking axle sleeve (12) and stretches out for described latch shaft (1) simultaneously; Described fail secure button (5) is fixed on support (4), and positioned opposite with one end of described latch shaft (1) protuberate basic unit (3) perforate; Described magnetic switch (6) is also fixed on described support (4).
3. explosion-proof frequency conversion case capacitor set discharge locking device according to claim 2, it is characterized in that described latch shaft (1) one end radial direction relative with fail secure button (5) is provided with jump-ring slot, fix the jump ring (11) had for carrying out axial limiting to latch shaft (1) in described jump-ring slot, and the other end of latch shaft (1) stretches out described latch receptacles (2) and the boss (13) formed for axial limiting.
4. explosion-proof frequency conversion case capacitor set discharge locking device according to claim 1, it is characterized in that described rotating member is disk (8), described magnetic patch (7) is fixed in the card of disk (8), and described magnetic switch (6) is positioned at the front of described magnetic patch (7).
5. explosion-proof frequency conversion case capacitor set discharge locking device according to claim 4, it is characterized in that described disk (8) by flat head screw (9) and some pads (10) axial locking in described latch shaft (1) one end relative with fail secure button (5), described pad (10) is for regulating the axial spacing of magnetic patch (7) and magnetic switch (6).
6. the explosion-proof frequency conversion case capacitor set discharge locking device according to claim 1 or 2 or 3 or 4 or 5, it is characterized in that described latch shaft (1) triggers the stroke that fail secure button (5) action cuts off primary power source de-energizes is A, the stroke that described latch shaft (1) triggers fail secure button (5) action unblock quick opening mechanism is B, and the stroke of latch shaft (1) is C during described magnetic patch (7) driving magnetic switch (6) action connection repid discharge loop, and A≤C < B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310132941.6A CN103259398B (en) | 2013-04-17 | 2013-04-17 | Flameproof type frequency conversion box capacitor bank discharging blocking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310132941.6A CN103259398B (en) | 2013-04-17 | 2013-04-17 | Flameproof type frequency conversion box capacitor bank discharging blocking device |
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| Publication Number | Publication Date |
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| CN103259398A CN103259398A (en) | 2013-08-21 |
| CN103259398B true CN103259398B (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310132941.6A Active CN103259398B (en) | 2013-04-17 | 2013-04-17 | Flameproof type frequency conversion box capacitor bank discharging blocking device |
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| CN (1) | CN103259398B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105244847B (en) * | 2015-08-28 | 2018-11-20 | 洛阳中重自动化工程有限责任公司 | Multiple safety interlocking protection system and method for explosion-proof frequency converter |
| CN108400039B (en) * | 2018-04-19 | 2023-11-14 | 天地（常州）自动化股份有限公司 | Combined electromechanical locking device of explosion-proof electrical equipment |
| CN109922430B (en) * | 2019-03-20 | 2020-12-18 | 苏州真趣信息科技有限公司 | Restricted space operating system and method |
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| CN2218970Y (en) * | 1995-04-27 | 1996-01-31 | 天津本布罗电子有限公司 | Mechanic driving device with explosive isolating equipment of isolator |
| CN200956313Y (en) * | 2006-10-13 | 2007-10-03 | 珠海优特电力科技股份有限公司 | Electronic locking device |
| DE102006054637A1 (en) * | 2006-11-16 | 2008-05-21 | Siemens Ag | Switch gear cabinet for accommodating e.g. relay, has bolt working together with mechanism and locking unit such that opening of door in on-position of gear unit and switching operation from off-position into on-position are prevented |
| CN201122528Y (en) * | 2007-12-05 | 2008-09-24 | 阜新金昊空压机有限公司 | Dynamoelectric association closedown explosion-proof control box |
| CN202872613U (en) * | 2012-09-11 | 2013-04-10 | 上海伟肯实业有限公司 | A traction frequency conversion equipment structure of a coal cutter |
| CN203205860U (en) * | 2013-04-17 | 2013-09-18 | 上海华欣民福电气科技有限公司 | Discharge blocking device for capacitor bank of flame-proof type frequency conversion box |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7973253B2 (en) * | 2008-12-10 | 2011-07-05 | Eaton Corporation | Neutral draw-out automatic transfer switch assembly and associated method |
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2013
- 2013-04-17 CN CN201310132941.6A patent/CN103259398B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2218970Y (en) * | 1995-04-27 | 1996-01-31 | 天津本布罗电子有限公司 | Mechanic driving device with explosive isolating equipment of isolator |
| CN200956313Y (en) * | 2006-10-13 | 2007-10-03 | 珠海优特电力科技股份有限公司 | Electronic locking device |
| DE102006054637A1 (en) * | 2006-11-16 | 2008-05-21 | Siemens Ag | Switch gear cabinet for accommodating e.g. relay, has bolt working together with mechanism and locking unit such that opening of door in on-position of gear unit and switching operation from off-position into on-position are prevented |
| CN201122528Y (en) * | 2007-12-05 | 2008-09-24 | 阜新金昊空压机有限公司 | Dynamoelectric association closedown explosion-proof control box |
| CN202872613U (en) * | 2012-09-11 | 2013-04-10 | 上海伟肯实业有限公司 | A traction frequency conversion equipment structure of a coal cutter |
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| CN103259398A (en) | 2013-08-21 |
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Effective date of registration: 20180205 Address after: 417100 Lianyuan economic and Technological Development Zone, Loudi, Hunan Patentee after: Hunan Chuangan Flameproof Electricappliances Co.,Ltd. Address before: 200233 Shanghai City, Minhang District Caobao Road No. 1108, Room 202, Shanghai Huaxin Minfu Electric Technology Co Ltd Patentee before: Shanghai Huaxin Minfu Electrical Technology Co., Ltd. |
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