CN209472374U - A kind of elevator over-pressure safety device of failure delay recovery - Google Patents
A kind of elevator over-pressure safety device of failure delay recovery Download PDFInfo
- Publication number
- CN209472374U CN209472374U CN201920093399.0U CN201920093399U CN209472374U CN 209472374 U CN209472374 U CN 209472374U CN 201920093399 U CN201920093399 U CN 201920093399U CN 209472374 U CN209472374 U CN 209472374U
- Authority
- CN
- China
- Prior art keywords
- unit
- voltage
- delay recovery
- failure
- failure delay
- 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.)
- Active
Links
Landscapes
- Elevator Control (AREA)
Abstract
The utility model discloses a kind of elevator over-pressure safety devices of failure delay recovery; it is arranged between power input terminal (1) and power output terminal (6), including the protection execution unit (5) being connect simultaneously with power input terminal (1) and power output terminal (6)；The power input terminal (1) is also connected with voltage acquisition unit (2), voltage conditioning comparing unit (3) and failure delay recovery unit (4) in turn, and the failure delay recovery unit (4) is connected with protection execution unit (5)；The power input terminal (1) is also connected with power supply unit of voltage regulation (7), and voltage regulation unit unit is connected with voltage conditioning comparing unit (3) and failure delay recovery unit (4) simultaneously.The utility model has the function of delay recovery, can save manpower and physics, good in economic efficiency, and over-voltage detection accuracy and real-time are high.
Description
Technical field
The utility model relates to a kind of over-pressure safety device, the elevator overvoltage protection of especially a kind of failure delay recovery is filled
It sets.
Background technique
With the high speed development of science and technology, power supply system development is also maked rapid progress therewith.Power supply system is adopted
Industrial-frequency alternating current (i.e. alternating current) has goed deep into each corner of people's production and living, it may be said that people have left electric power will
Normal production and living can not be carried out.The following Electrical Safety has become more and more important.
In order to make alternating current have very easily realization power conversion function, usual power transmission is the side with three-phase and four-line
Formula, referred to as " phase line ", three tails of three-phase electricity link together claims the neutral conductor to be also " zero curve " to three of three-phase electricity.It is zero curve
The reason of be there is no electric current to pass through in the three-phase equilibrium moment neutral conductor, what besides it was direct or indirect is connected to the earth, with big
Ground voltage is also close to zero.In electrotechnics, the alternating voltage for accessing line is 220 volts, single line access the earth therein,
It is called " zero curve ", another single line is called firewire.In electrical engineering, commonly referred to as zero curve firewire or 1 fire.
During actual power, specified line voltage is 220VAC ± 15%.Over-voltage phenomenon is identified as if beyond the range.
The reason of causing mains supply over-voltage is relatively more, such as: zero line break, ageing equipment, technical failure, man-made fault, natural calamity, great Rong
Measure load switching etc..Over-voltage will use the insulation breakdowns such as electric equipment, power supply line, generate heat, burns, even cause fire.Therefore
It is very necessary that serious consequence caused by over-voltage is taken precautions against in advance.
Over-pressure safety device on the market is usually to use air switch at present, the modes such as silicon-controlled.These mode structures
Simply, control precision is low, and control sensitivity is relatively low.Occur when over-voltage to be likely to that electrical equipment cannot be protected in time, and not
Has failure delayed recovery function.
Especially in elevator control system, once it is abnormal that electric voltage over press occurs, it is likely that and cause elevator emergency parking to be stranded
The emergency of people.Existing elevator overvoltage protection device is due to lacking failure delayed recovery function, when voltage restores normal,
Just elevator door can only be opened by elevator service personnel even fireman and put people, also easily cause while waste of manpower participates in
The damage of elevator components.
Therefore, design it is a kind of have the function of delay recovery, it is good in economic efficiency, and detection accuracy and the high over-voltage of real-time
Protective device is industry technical staff's urgent problem.
Utility model content
The purpose of the utility model is to provide a kind of elevator over-pressure safety devices of failure delay recovery.This is practical new
Type has the function of delay recovery, can save manpower and physics, good in economic efficiency, and over-voltage detection accuracy and real-time are high.
The technical solution of the utility model includes: a kind of elevator over-pressure safety device of failure delay recovery, is arranged defeated in power supply
Enter between terminal and power output terminal, the protection including connecting simultaneously with power input terminal and power output terminal executes list
Member；The power input terminal is also connected with voltage acquisition unit, voltage conditioning comparing unit and failure delay recovery list in turn
Member, the failure delay recovery unit are connected with protection execution unit；The power input terminal is also connected with regulated power supply
Unit, voltage regulation unit unit improves comparing unit with voltage simultaneously and failure delay recovery unit is connected.
In a kind of elevator over-pressure safety device of failure delay recovery above-mentioned, the protection execution unit includes setting respectively
Set two relays on firewire and zero curve.
In a kind of elevator over-pressure safety device of failure delay recovery above-mentioned, the relay is power-type relay.
In a kind of elevator over-pressure safety device of failure delay recovery above-mentioned, the voltage acquisition unit is electrical isolation
Current-voltage transformer circuit.
In a kind of elevator over-pressure safety device of failure delay recovery above-mentioned, the voltage conditioning comparing unit is parallel connection
Type voltage reference chip.
In a kind of elevator over-pressure safety device of failure delay recovery above-mentioned, the failure delay recovery unit includes
Delays time to control logic chip interconnected and Schmitt output Shaping driving chip.
In a kind of elevator over-pressure safety device of failure delay recovery above-mentioned, the power supply unit of voltage regulation includes mutual
Connect transformer rectifier circuit and DC/DC Switching Power Supply.
Compared with prior art, the utility model high-precision can detect power supply mistake when over-voltage occurs for power supply system
Pressure, and high real-time carry out protection rear class elevator electrical equipment and power supply line, improve electricity consumption safety while,
Once supply voltage restores normal, it is automatically restored to elevator control system power supply.Even if thus lift car is in failure
Non- level position, automatic power after fault recovery, elevator control system can also save oneself operation, automatically by trapped person in elevator
It is loaded onto level position, people is put in enabling.
Further, protection execution unit controls firewire and zero line output using two relays respectively, when occurring
Firewire and zero curve simultaneously switch off when pressure, and safety is more preferable.Further, according to the suitable specified electricity of the power selection of electrical equipment
The power-type relay of stream, voltage rating, device are not easy failure.
Further, the preferred current-voltage transformer of voltage acquisition unit is acquired input supply voltage, to protect
Demonstrate,prove the acquisition precision and real-time of voltage signal.Since the input terminal and output end of mutual inductor are mutually isolated, so, it ensure that and adopt
The safety of collector itself.
Further, voltage improves the preferred parallel connection type voltage reference chip of comparing unit, and the signal exported after conditioning is steady
It is fixed reasonable,
Further, the Schmitt output Shaping driving chip of failure delay recovery unit can effectively reduce the module
The signal rise and fall of output have output hysteresis function along the time.
Further, the mode of the preferred transformer isolation of power supply unit of voltage regulation and DC/DC pressure stabilizing conversion, which make to protect
Protection unit itself is completely isolated with alternating current, considerably increases whole safety coefficient.
To sum up, the utility model has the function of delay recovery, can save manpower and physics, good in economic efficiency, and mistake
Press detection accuracy and real-time high.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of voltage acquisition unit；
Fig. 3 is the structural schematic diagram of voltage conditioning comparing unit；
Fig. 4 is the structural schematic diagram of failure delay recovery unit；
Fig. 5 is the structural schematic diagram for protecting execution unit；
Fig. 6 is power supply unit of voltage regulation；
The output schematic diagram of failure delay recovery unit when Fig. 7 is low-voltage；
The output schematic diagram of failure delay recovery unit when Fig. 8 is high voltage；
Fig. 9 is the reset schematic diagram of failure delay recovery unit.
Appended drawing reference: 1- power input terminal, 2- voltage acquisition unit, 3- voltage improve comparing unit, the delay of 4- failure
Recovery unit, 5- protect execution unit, 6- power output terminal, 7- power supply unit of voltage regulation, 8- transformer rectifier circuit, 9-DC/DC
Switching Power Supply.
Specific embodiment
Below with reference to embodiment, the utility model is described in further detail, but be not intended as to the utility model limit according to
According to.
Embodiment: a kind of elevator over-pressure safety device of failure delay recovery constitutes as shown in Figures 1 to 9, is arranged in electricity
Between source input terminal 1 and power output terminal 6, including the guarantor being connect simultaneously with power input terminal 1 and power output terminal 6
Protect execution unit 5；The power input terminal 1 is also connected with voltage acquisition unit 2, voltage conditioning comparing unit 3 and event in turn
Hinder delay recovery unit 4, the failure delay recovery unit 4 is connected with protection execution unit 5；The power input terminal 1
It is also connected with power supply unit of voltage regulation 7, voltage regulation unit unit improves comparing unit 3 and failure delay recovery unit 4 with voltage simultaneously
It is connected.
As shown in Fig. 2, 2 input terminal of voltage acquisition unit connects detected alternating current zero curve and firewire, the N_ in corresponding diagram
IN and L_IN, output end connect voltage and improve comparing unit 3.Using the high-precision of isolation, electric current output is more electric than the voltage for being 1:1
Current transformer is converted to the mains voltage signal of input the low voltage signal of isolation.Since current transformer electric current exports
Than mutual inductor coil output voltage U can be calculated thus for 1:1out(t) are as follows:
Wherein: iout(t) electric current is exported for mutual inductor；R3Sampling resistor is exported for mutual inductor；Uin(t) it is inputted for mutual inductor
Voltage；iinIt (t) is mutual inductor input current；R1、R2Current-limiting resistance is inputted for mutual inductor.Since current transformer electric current exports ratio
For 1:1, so iout(t) and iin(t) equal.
As shown in figure 3, voltage conditioning comparing unit 3 can be divided into signal conditioning module and signal comparison module.To voltage
The output voltage signal of acquisition unit 2 is improved, and the signal stabilization for exporting it is reasonable, then is carried out with the voltage threshold of setting
Compare, comparison result is then transferred to failure delay recovery unit 4.
Voltage fortune after the output voltage signal entering signal conditioning module of voltage acquisition unit 2, in signal conditioning unit
It calculates amplifier and processing, and the folded common-mode voltage that joined 2.5V is amplified to its differential voltage signal, so that it becomes single-ended electricity
Signal is pressed, is handled compared with the threshold voltage of rear class voltage comparison module progress voltage with facilitating.Signal condition exports single-ended
Voltage signal Uout#It calculates:
Work as R4=R6And R5=R7When, following formula can be obtained:
U in formulaoutFor U above-mentionedout(t)。
The threshold voltage of signal comparison module is set as VTHL=0.5V and VTHH=4.5V.When signal conditioning module output
Single-ended voltage signal is in VTHLWith VTHHBetween when, signal comparison module export low level；Otherwise when signal conditioning module exports
Single-ended voltage signal be lower than VTHLOr it is higher than VTHHWhen, signal comparison module exports high level.The ratio of signal comparison module output
Relatively result is transmitted to failure delay recovery unit 4.
As shown in figure 4, failure delay recovery unit 4, logic chip and a Schmitt including delays time to control are defeated
Shaping driving chip out；When being triggered, output corresponding control signal, trigger signal disappear the logic chip of delays time to control at once
After be delayed after a certain period of time, output control signal just it is back to normal；Schmitt output Shaping driving chip can effectively reduce this
The signal rise and fall of module output have output hysteresis function along the time.The input terminal and electricity of failure delay recovery unit 4
The signal comparison module connection of pressure conditioning comparing unit 3, output end connection protection execution unit 5.
As shown in Figure 7 and Figure 8, become low level simultaneous faults delay recovery when signal comparison module is exported from high level
The output of unit 4 becomes high level from low level.When the output of signal comparison module is low level, failure delay recovery unit 4 is defeated
High level is held in continuation of insurance of being adopted as a child.When the output of signal comparison module becomes high level from low level, failure delay recovery unit 4 is exported
Start timing, reverts to low level after the 200ms that is delayed.As shown in figure 9, if the output of signal comparison module occurs in 200ms
Low level pulse, the then timing that is delayed are reset to 0, restart timing.It is kept until the output of signal comparison module is lasting in 200ms
For high level, the output of failure delay recovery unit 4 just can become low level from high level.
As shown in figure 5, it is described protection execution unit 5 control terminal connect with failure delay recovery unit 4, controlled terminal it is defeated
Enter and connect with power input terminal 1, output is connect with power output terminal 6.When failure delay recovery unit 4 exports low level
Controlled terminal conducting, electrical equipment are electrically connected with city, be can work normally.The quilt when failure delay recovery unit 4 exports high level
It controls end to disconnect, electrical equipment is electrically disconnected with city, and electrical equipment is protected.
As shown in fig. 6,7 input terminal of power supply unit of voltage regulation is connect with power input terminal 1, the pressure stabilizing+5v electricity of output
Source powers to late-class circuit, comprising: voltage improves comparing unit 3, failure delay recovery unit 4 and protection execution unit 5.The list
Member uses isolating transformer and DC/DC Switching Power Supply mode.Isolating transformer in transformer rectifier circuit 8 is electric the alternating current of input
Pressure drop pressure is 12v, exports after rectifier bridge rectifying and wave-filtering to the circuit of DC/DC Switching Power Supply 9, passes through DC/DC chopping depressuring
Stable+5v DC power supply is exported after Switching Power Supply control chip processing.
The electrical equipment that the power input terminal 1 electrically connects as the present apparatus and rear class with city provides power supply.Power supply is defeated
Terminal 6 is connect with electrical equipment out, provides power supply when alternating current is normal for electrical equipment.
Claims (7)
1. a kind of elevator over-pressure safety device of failure delay recovery is arranged in power input terminal (1) and power output terminal
(6) between, it is characterised in that: the protection including connecting simultaneously with power input terminal (1) and power output terminal (6) executes list
First (5)；The power input terminal (1) is also connected with voltage acquisition unit (2), voltage conditioning comparing unit (3) and event in turn
Hinder delay recovery unit (4), the failure delay recovery unit (4) is connected with protection execution unit (5)；The power input
Terminal (1) is also connected with power supply unit of voltage regulation (7), and voltage regulation unit unit prolongs with voltage conditioning comparing unit (3) and failure simultaneously
When recovery unit (4) be connected.
2. a kind of elevator over-pressure safety device of failure delay recovery according to claim 1, it is characterised in that: the guarantor
Protecting execution unit (5) includes two relays being separately positioned on firewire and zero curve.
3. a kind of elevator over-pressure safety device of failure delay recovery according to claim 2, it is characterised in that: it is described after
Electric appliance is power-type relay.
4. a kind of elevator over-pressure safety device of failure delay recovery according to claim 1, it is characterised in that: the electricity
Pressing acquisition unit (2) is the current-voltage transformer circuit of electrical isolation.
5. a kind of elevator over-pressure safety device of failure delay recovery according to claim 1, it is characterised in that: the electricity
Pressure conditioning comparing unit (3) is parallel connection type voltage reference chip.
6. a kind of elevator over-pressure safety device of failure delay recovery according to claim 1, it is characterised in that: described
Failure delay recovery unit (4) includes delays time to control logic chip interconnected and Schmitt output Shaping driving chip.
7. a kind of elevator over-pressure safety device of failure delay recovery according to claim 1, it is characterised in that: described
Power supply unit of voltage regulation (7) includes being connected with each other transformer rectifier circuit (8) and DC/DC Switching Power Supply (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920093399.0U CN209472374U (en) | 2019-01-21 | 2019-01-21 | A kind of elevator over-pressure safety device of failure delay recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920093399.0U CN209472374U (en) | 2019-01-21 | 2019-01-21 | A kind of elevator over-pressure safety device of failure delay recovery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209472374U true CN209472374U (en) | 2019-10-08 |
Family
ID=68092207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920093399.0U Active CN209472374U (en) | 2019-01-21 | 2019-01-21 | A kind of elevator over-pressure safety device of failure delay recovery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209472374U (en) |
-
2019
- 2019-01-21 CN CN201920093399.0U patent/CN209472374U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102315621B (en) | Electric wire connection protecting device with self-checking function | |
| CN103022959B (en) | Method and device for adhesion detection of main contact of alternating-current contactor | |
| EP1811627A1 (en) | A short circuit breaker without electric contact | |
| CN204243728U (en) | Transformer overload protection warning device | |
| CN101976815B (en) | Loaded multifunctional protection circuit | |
| CN106058802B (en) | Anti-failure circuit chip and anti-failure anti-leakage protector | |
| CN209472374U (en) | A kind of elevator over-pressure safety device of failure delay recovery | |
| CN202424109U (en) | Electric protection module | |
| CN106546796A (en) | A kind of voltage detecting circuit | |
| CN201256220Y (en) | Induction safety socket circuit | |
| CN201422011Y (en) | Leakage-detecting protective circuit | |
| CN205195233U (en) | Power leakage protector | |
| CN105207181B (en) | A kind of adaptive method of undervoltage protection of hvdc transmission line | |
| CN203180491U (en) | Electric leakage protection device | |
| CN208971130U (en) | A kind of power circuit of anti-AC over-and under-voltage | |
| CN201774222U (en) | Electric connecting wire protecting device with self-checking function | |
| CN102288808A (en) | LED (light-emitting diode) over-current detection circuit and LED driving control circuit | |
| CN2626107Y (en) | Electronic motor protector | |
| CN201587779U (en) | Power supply system of elevator | |
| CN201282328Y (en) | Motor protector with single-phase grounding protection | |
| CN110835061A (en) | Tower crane control system with defensive protection | |
| CN215415580U (en) | Leakage early warning and circuit breaker | |
| CN218383089U (en) | Single-phase voltage self-resetting module detection device | |
| CN203233148U (en) | Comprehensive detection and power utilization protection device of power frequency and variable-frequency power supply | |
| CN216252156U (en) | Anti-creeping protection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |