CN2101659U - Safety electrical equipment of explosion-proof elevator - Google Patents
Safety electrical equipment of explosion-proof elevator Download PDFInfo
- Publication number
- CN2101659U CN2101659U CN 91203390 CN91203390U CN2101659U CN 2101659 U CN2101659 U CN 2101659U CN 91203390 CN91203390 CN 91203390 CN 91203390 U CN91203390 U CN 91203390U CN 2101659 U CN2101659 U CN 2101659U
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- CN
- China
- Prior art keywords
- explosion
- relay
- power supply
- proof
- guard grating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
The utility model discloses the safety electrical device of the explosion-proof elevator, comprising a power supply, a miniature circuit breaker, a safety barrier, and a common non explosion-proof electrical switch which can control the motion of the relay. The power supply, the relay, and the safety barrier are arranged in the elevator control room of the safe place, and the control switch is arranged in an elevator car, a hall door, and a well channel with the explosive gas. Since the protecting function of the safety barrier, when the miniature replay is conducted the powering operation and the breaker operation, when the faults that the overpressure of the power supply and the short circuit caused by that the relay can attract the lines and parcels are met, the non explosion-proof electrical switch can not generate the energy of the required electrical spark which can evoke the explosion of the explosive gas, and the non explosion-proof electrical switch can be applied in places which have explosion dangers.
Description
The present invention relates to a kind of common non-explosion proof type electric switch is applied in the explosion-proof lift that has the intrinsic safety type electrical equipment in the explosion-proof lift.
Explosion-proof lift is a kind of special elevator that can be used for explosion hazard area.Why explosion-proof lift can be explosion-proof, is that the various piece of elevators such as hoistway has all been taked measures for the prevention of explosion because to elevator(lift) machine room.The pressure charged explosion proof type elevator that is disclosed as China utility model CN86210650U, its utilize to elevator(lift) machine room constantly fill make with air (non-explosion hazard gases) this machine room inner air pressure than high 5 millimeter water column of the flammable explosive gas pressure in the surrounding environment more than, and make air in this machine room constantly from the inflammable and explosive environment around the exhaust outlet of hoistway or car door are discharged to.This utility model remains machine room and is in the explosion-proof problem that barotropic state has successfully solved machine room.Make and in the control machine room of explosion-proof lift, can use various non-explosion-proof electrical apparatus components and parts safely.But,, solve the explosion-proof problem of hoistway and car because whole hoistway space scope is too big, thereby can't adopt pressurized measure to elevator hoistways and the car that is in the hoistway.Because the electric switch in car, hoistway and the Room door can't must use the explosion proof type electric switch with the flammable explosive gas environmental insulation.At present this class explosion proof type electric switch all is from himself structure design-calculated, and therefore, this class construction of switch complexity, volume is big, cost is high, commonality is poor.For the problem that overcomes above-mentioned existence has proposed the utility model.
The purpose of this utility model is to provide a kind of electrical equipment of essential safety in the explosion-proof lift system, carry down at such intrinsic safety electrical equipment band, make the ordinary appliances switch that in the car of explosion-proof lift and hoistway, can use non-explosion proof type safely and device to replace explosion proof type electric switch and device.
Intrinsic safety type electrical equipment of the present utility model comprises: power supply; Relay; Guard grating; Non-explosion proof type common electrical air cock with the control relay action.Described power supply, relay and guard grating are arranged in the machine room of harbor as the elevator control operation that is arranged on the plemum with explosion-proof ability, and the common electrical air cock is arranged in the place with explosion hazard as is arranged in car, hoistway and the door place, the Room.One end of the suction unwrapping wire bag of relay links to each other with a mouth of power supply, and the other end of this line bag links to each other with an input end of guard grating, and a mouth of this guard grating links to each other with an end of the common electrical air cock of the described actuating of relay of control.Another mouth of the other end of this electric switch, the ground terminal of guard grating, power supply all is connected to ground wire altogether.
According to said structure and bonded assembly intrinsic safety type electrical equipment, protective action by guard grating, even make above-mentioned non-explosion-proof common electrical air cock cause and make the non-explosion-proof electrical apparatus switch be applied to explosion hazard area safely by the required electro spark energy of explosion hazard gases blast midget relay being carried out also can not produce when overvoltage that switching when operation electricity suffer power supply or relay are inhaled fault such as unwrapping wire bag short circuit.
Advantage of the present utility model is in the explosion-proof lift system and can substitutes flame-proof switch in the explosive environments with non-explosion-proof common electrical air cock, thus can the reduction system volume, reduce the cost, easy to maintenance.
Under request in person and see specific embodiment.
Fig. 1 is an embodiment of the present utility model;
Fig. 2 is power principle figure of the present utility model;
Fig. 3 is another embodiment of the present utility model;
Fig. 1 is a specific embodiment of the present utility model, and the intrinsic safety type electrical equipment 15 of explosion-proof lift of the present utility model is made up of the common non-explosion-proof electrical apparatus switch 7 of power supply 10, midget relay 8, guard grating 11 and 8 actions of control midget relay.Wherein power supply 10, midget relay 8 and guard grating 11 are arranged on harbor 1, control in the machine room as being arranged on the elevator with positive-pressure explosion-proof.And the non-explosion-proof electrical apparatus switch 7 of control midget relay 8 action is arranged on explosion hazard area 2, as being arranged in the car or hoistway and Room door with flammable explosive gas.Of the present utility modelly specifically be connected to: power supply 10 input ends 3 connect AC power frequency voltage; One end 4A of power supply 10 mouths 4 links to each other with an end 8A of the suction unwrapping wire bag of relay 8; The other end 8B of the suction unwrapping wire bag of relay 8 links to each other with an end 5A of the input end 5 of guard grating 11; One end 6A of the mouth 6 of guard grating 11 links to each other with an end 7A of non-explosion-proof common electrical air cock 7; The other end 7B of switch 7, ground terminal 5B, the 6B of the input of guard grating 11, output, and the other end 4B of the mouth 4 of power supply 10 all is connected to ground wire altogether.
Guard grating 11 is known technologies, getting model here is the DFA-R type, guard grating is a kind of device that limits energy, and when the control path that is provided with guard grating was in normal working, the normal function that guard grating can not influence circuit was that its input end 5 and mouth 6 are connected on electric.When control path was in faulty condition, guard grating can be limited in the dangerous energy efficient in the control path under the faulty condition safety value with interior or cut off being electrically connected between its input end 5 and the mouth 6.
Referring to Fig. 3, Fig. 3 is power supply 10 schematic diagrams of the present utility model, and this power supply 10 utilizes regulator block SW7824 to carry out voltage stabilizing output+24V and supplies with relay 8.At its mouth and be connected to 2 zener diode DW
1X2 is in order to prevent the impacting with high pressure from power supply.Regulator block SW7824 two ends also meet diode D20 and are used to protect regulator block to make it not to be subjected to back-pressure and damage.
Fig. 1 figure below is the AC contactor 9 that is subjected to the contact 8J control of relay 8, and this AC contactor 9 is the function unit of power part work such as control elevator lifting machine.When the electric switch 7 in car or hoistway, the place that takes a lift is connected, then relay 8 absorbs line bags its corresponding contacts 8J closure of switching on and makes AC contactor 9 energising work, then by each power part work in the corresponding contacts control elevator device of AC contactor.
According to GB3836.4-83, when power supply 10 voltages are 24V, be the intrinsically safe circuit of II B to explosive-proof grade, the maximum inaccurate 600mA that surpasses of the electric current that is allowed in its circuit.Therefore we select midget relay 8 models for use is JZX-17F/024-1Z, and its working current has only 10mA, is foolproof when intrinsic safety type electrical equipment 15 normal operation of the present utility model.This moment, the closing current by switch 7 contacts had only 10mA, and it is not enough to ignition and blasting existing flammable explosive gas around it.
If the unexpected rising of the short circuit of the suction unwrapping wire bag of generation relay 8 or AC power frequency input and high impulse disturb when sealing in power supply 10 in 15 work of intrinsic safety type electrical equipment, the electric current that flows through switch 7 then can increase the danger that causes flammable explosive gas blast on every side suddenly, because the present invention inserted guard grating 11 integrated packages in electrical equipment 15, thereby the big current absorption that it will flow through switch 7 is in time fallen or circuit cut off make switch 7 not flow through the danger that big electric current has been avoided the hazardous area blast under any electric state.
From the above mentioned, the intrinsic safety type electrical equipment of explosion-proof lift of the present utility model makes and uses the common alternative explosion-proof electrification on-off element of non-explosion-proof electrical apparatus on-off element in inflammable and explosive hazardous area owing to used guard grating and midget relay.Thereby make volume-diminished, the cost reduction, easy to maintenance of entire equipment.
See Fig. 2 below again, the figure illustrates a kind of embodiment that is applicable to the explosion-proof intrinsic safety type electrical equipment of a plurality of common electrical air cocks in elevator hoistways and the lift car.Among this embodiment except that power supply be each road shared, all the other every roads are identical with appropriate section among Fig. 1.Certain regulation aspect the power requirement of considering the specification of concrete guard grating, relay and anti-explosion safety, also can the shared guard grating of several electric switches, a plurality of relay grouping is implemented even power supply is also available, more than these combinations change and all belong to the utility model scope.
Claims (5)
1, a kind of intrinsic safety type electrical equipment of explosion-proof lift comprises: power supply; Relay; Guard grating; Common electrical air cock with the described actuating of relay of control, it is characterized in that, described power supply, relay and guard grating are arranged on harbor and described common electrical air cock is arranged in the place with explosion hazard, and an end of the suction unwrapping wire bag of described relay links to each other with a mouth of described power supply; The other end of the suction unwrapping wire bag of described relay links to each other with an input end of described guard grating, and a mouth of this guard grating links to each other the other end of described electric switch with an end of the described common electrical air cock of the described actuating of relay of control; The ground terminal of guard grating; Another mouth of power supply all is connected to ground wire altogether.
2, equipment as claimed in claim 1 is characterized in that described power supply is provided with regulator block SW7824 in it, and has+24V voltage stabilizing output.
3, equipment as claimed in claim 1 is characterized in that described relay is the JZX-17F/024-1Z midget relay.
4, equipment as claimed in claim 1 is characterized in that described guard grating is the DFA-R type.
5,, it is characterized in that the mouth of described power supply and be connected to the protection zener diode as equipment as described in the claim 1,2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91203390 CN2101659U (en) | 1991-03-04 | 1991-03-04 | Safety electrical equipment of explosion-proof elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91203390 CN2101659U (en) | 1991-03-04 | 1991-03-04 | Safety electrical equipment of explosion-proof elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2101659U true CN2101659U (en) | 1992-04-15 |
Family
ID=4913717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91203390 Expired - Lifetime CN2101659U (en) | 1991-03-04 | 1991-03-04 | Safety electrical equipment of explosion-proof elevator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2101659U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102855676A (en) * | 2012-09-18 | 2013-01-02 | 深圳市神拓机电设备有限公司 | Mining explosion-proof access control system |
| CN102855677A (en) * | 2012-09-18 | 2013-01-02 | 深圳市神拓机电设备有限公司 | Mining flameproof and intrinsically safe access controller |
| CN104470033A (en) * | 2013-09-16 | 2015-03-25 | 深圳市海洋王照明工程有限公司 | Composite explosion-proof circuit |
| CN105836624A (en) * | 2016-05-31 | 2016-08-10 | 河南卫华机械工程研究院有限公司 | Control circuit for explosion-proof place |
| CN113682932A (en) * | 2021-08-17 | 2021-11-23 | 恒达富士电梯有限公司 | Dedicated control system of explosion-proof ladder |
-
1991
- 1991-03-04 CN CN 91203390 patent/CN2101659U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102855676A (en) * | 2012-09-18 | 2013-01-02 | 深圳市神拓机电设备有限公司 | Mining explosion-proof access control system |
| CN102855677A (en) * | 2012-09-18 | 2013-01-02 | 深圳市神拓机电设备有限公司 | Mining flameproof and intrinsically safe access controller |
| CN104470033A (en) * | 2013-09-16 | 2015-03-25 | 深圳市海洋王照明工程有限公司 | Composite explosion-proof circuit |
| CN105836624A (en) * | 2016-05-31 | 2016-08-10 | 河南卫华机械工程研究院有限公司 | Control circuit for explosion-proof place |
| CN113682932A (en) * | 2021-08-17 | 2021-11-23 | 恒达富士电梯有限公司 | Dedicated control system of explosion-proof ladder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |