CN202163999U - Slowly descending device of elevator - Google Patents
Slowly descending device of elevator Download PDFInfo
- Publication number
- CN202163999U CN202163999U CN201120233310XU CN201120233310U CN202163999U CN 202163999 U CN202163999 U CN 202163999U CN 201120233310X U CN201120233310X U CN 201120233310XU CN 201120233310 U CN201120233310 U CN 201120233310U CN 202163999 U CN202163999 U CN 202163999U
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- voltage
- elevator
- module
- descending device
- direct current
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Abstract
The utility model discloses a slowly descending device of an elevator, which comprises a motor used for generating alternating current by the motion of the elevator; a rectifying unit used for transforming the alternating current generated by the motor into direct current; a voltage detecting unit used for detecting the voltage of the direct current; and a discharging unit used for discharging the direct current, wherein a threshold voltage is further preset in the voltage detecting unit; when the voltage of the direct current is larger than the threshold value unit, the discharging unit discharges the direct current. The slowly descending device of the elevator implements uniform motion of the motor by detecting and controlling the alternating current in a motor, thereby achieving constant-speed descending no matter how large the load of the lift car is, so that the rescue process is safe and steady; therefore, the slowly descending device of the elevator solves the problem of overlong rescue time of the traditional method, potential safety hazard when the lift car is heavily loaded, reduction of the service life of the band-type brake due to use of the band-type brake, and the like.
Description
Technical field
The utility model relates to a kind of elevator slow descending device, particularly relates to the slow device that falls elevator of a kind of constant speed.
Background technology
In the existing elevator; Especially the elevator of wind tower has a power failure or during other faults, the car of said elevator probably is parked in the position of non-flat bed in elevator generation in service; So personnel will be trapped in the car; At this moment need discharge the main frame band-type brake in the elevator through artificial mode, utilize car deadweight downhill race to bottom, realization personnel rescue.
In car downslide process, can also guarantee personnel and device security when letting car glide, the slip velocity that requires car is below the speed of safety.
In the prior art through adopting mechanical friction gear to realize above requirement.Promptly when the main frame band-type brake was released, car can quicken to glide by by gravity, and along with the speed increasing of car, the friction force of friction gear increases.When said gravity equated with friction force, the car constant speed descended.
When adopting this decline mode and since when car when unloaded, descending speed is slow, so the realization personnel overlong time of rescuing; And work as car near at full load, possibly can't realize that said gravity equates with friction force, and descending speed is than very fast, so can bring potential safety hazard.If utilize this moment band-type brake to slow down again, can aggravate the wearing and tearing of band-type brake parts, thereby shorten the service life of band-type brake.
The utility model content
The technical matters that the utility model will solve be for overcome elevator in the prior art slow fall in the operation descending speed slow with the descending speed instability; And the car load of elevator there is a defective of requirement; A kind of elevator slow descending device is provided; In the decline process through detecting and control alternating current in the electrical motor, thereby realize the uniform movement of electrical motor.
The utility model solves above-mentioned technical matters through following technical proposals:
The utility model provides a kind of elevator slow descending device, is characterized in that said elevator slow descending device comprises: an electrical motor, through the motion generation alternating current of said elevator; One rectification unit is used for the alternating current that said electrical motor produces is converted into direct current (DC); One voltage detection unit is used to detect said galvanic voltage; And a discharge cell, be used for said direct current (DC) discharge;
Also be preset with a threshold voltage in the wherein said voltage detection unit, when said galvanic voltage greater than said threshold cell, said discharge cell discharges said direct current (DC).
Preferably, said elevator slow descending device also comprises a switch element, is used to open or turn-off the connecting path between said electrical motor and the said rectification unit.
Preferably, said voltage detection unit comprises: a voltage sample module, and said galvanic voltage is used to sample; One voltage comparison module is preset with a threshold voltage and is used for more said threshold voltage and said galvanic voltage;
Wherein work as said galvanic voltage greater than said threshold voltage, said voltage comparison module is controlled said discharge cell said direct current (DC) is discharged.
Preferably, said voltage detection unit also comprises a filtration module of the curtage fluctuation that is used for the said direct current (DC) of filtering.
Preferably, said voltage detection unit also comprises one first Voltage stabilizing module of the said galvanic voltage that is used to keep said rectification unit output.
Preferably, it is characterized in that said discharge cell comprises: a discharge module is used for said direct current (DC) discharge; One drive protecting module is used to limit the electric current that said voltage detection unit exports said discharge module to.
Preferably, said discharge cell also comprises one second Voltage stabilizing module of the voltage that is used to keep said voltage detection unit output.
Preferably; Said rectification unit has one first mouth and one second mouth; Said discharge module comprises a resistance and a switching transistor; Wherein said resistance, said first mouth and said switching transistor are electrically connected successively, and said switching transistor also is electrically connected with said voltage detection unit and said second mouth respectively.
The positive progressive effect of the utility model is:
The elevator slow descending device of the utility model is through detecting and control alternating current in the electrical motor; Thereby realize the uniform movement of electrical motor; Therefore when elevator malfunctions is shut down, no matter the car load weight all can reach constant speed decline; Rescue the process safety and steady thereby make, solved potential safety hazard when rescuing overlong time, car heavy duty in the orthodox method and the problems such as the band-type brake lost of life of using band-type brake to cause.
Description of drawings
Fig. 1 is the constructional drawing of first embodiment of the elevator slow descending device of the utility model.
Fig. 2 is the constructional drawing of second embodiment of the elevator slow descending device of the utility model.
Fig. 3 is the circuit structure diagram of the 3rd embodiment of the elevator slow descending device of the utility model.
The specific embodiment
Provide the utility model preferred embodiment below in conjunction with accompanying drawing, to specify the technical scheme of the utility model.
First embodiment:
The constructional drawing of the elevator slow descending device of the utility model as shown in Figure 1 is comprising an electrical motor 1, a rectification unit 2, a voltage detection unit 3 and a discharge cell 4.
The motion of wherein said electrical motor 1 through said elevator produces alternating current, promptly when said elevator descends, through driving the rotation of said electrical motor 1, thereby makes said electrical motor 1 generation alternating current.
Said rectification unit 2 is used for the alternating current that said electrical motor 1 produces is converted into direct current (DC), and said arrangement unit can adopt modes such as full-bridge rectification or half-bridge rectification to realize that alternating current arrives galvanic conversion.
Said voltage detection unit 3 is used to detect the said galvanic voltage that said rectification unit 2 is converted to.Also be preset with a threshold voltage in the wherein said voltage detection unit 3, when said galvanic voltage greater than said threshold cell, said discharge cell 4 discharges, thus with said direct current (DC) through the discharge consume.
The principle of work of present embodiment is following:
After elevator malfunctions, after said elevator began freely to descend, the motion of the car of said elevator drove the motion of said electrical motor 1, thereby said electrical motor 1 produces alternating current.
Said then rectification unit 2 converts said alternating current into direct current (DC), and said voltage detection unit 3 detects said galvanic voltage in real time whether above the threshold voltage that is provided with in advance simultaneously.
If said galvanic voltage is greater than said threshold voltage, said discharge cell 4 discharges said direct current (DC), thereby consumes said direct current (DC).
Meanwhile; Because galvanic minimizing this moment has caused importing the minimizing of the alternating current of said rectification unit 2; Promptly be equivalent to produce in the said electrical motor 1 oppositely directed alternating current; Thereby make said electrical motor 1 slow down, the car that therefore said electrical motor 1 drives said elevator slows down, thereby has realized the restriction to the car descending speed.
When said galvanic voltage less than said threshold voltage, said discharge cell 4 is closed, thus car freely descends once more.
After this, repeat above-mentioned each and detect actions such as voltage and discharge, thereby make the descending speed of said car maintain the pairing descending speed of said threshold voltage, so realized the decline of elevator constant speed.
Therefore only need the said threshold voltage of adjustment to regulate the descending speed of elevator in the utility model; Thereby can descend the needed time by self-defined elevator; Design concrete descending speed so can actv. wait, solved the potential safety hazard of rescuing overlong time in the orthodox method according to building height or tower height.
In addition because the descending speed of said elevator is irrelevant with said car load, and need not use the band-type brake of elevator to realize slowing down, so solved the problems such as potential safety hazard and the band-type brake lost of life when car is heavily loaded.
And the utility model realized the constant motion of elevator, rescues the process safety and steady thereby make.
Second embodiment:
As shown in Figure 2, the difference of the present embodiment and first embodiment is that the slow descending device of elevator described in the present embodiment also comprises a switch element 5, and said switch element 5 is used to open or turn-off the connecting path between said electrical motor 1 and the said rectification unit 2.When being in faults such as power failure when elevator, can manually open the elevator slow descending device in the present embodiment artificially.Thereby give the bigger operational space of user and prevent that system down from causing said cage lifter lifting device not worked.
In addition, voltage detection unit described in the present embodiment 3 comprises a voltage sample module 31 and a voltage comparison module 32.Said discharge cell 4 comprises a discharge module 41 and a drive protecting module 42.The galvanic voltage of said rectification unit 2 outputs of wherein said voltage sample module 31 samplings is preset with threshold voltage in the said voltage comparison module 32 and is used for more said threshold voltage and said galvanic voltage.Wherein when said galvanic voltage during greater than said threshold voltage, the discharge module 41 of the said discharge cell 4 of said voltage comparison module 32 controls discharges said direct current (DC).Said in addition drive protecting module 42 is used to limit said voltage detection unit 2 and exports the electric current of said discharge module 41 to, thereby prevents the damage of the outgoing current of excessive said voltage detection unit 2 to said discharge module 41.
The 3rd embodiment:
The circuit structure diagram of the elevator slow descending device of the utility model as shown in Figure 3, comprising a permanent magnet synchronous motor 1,, a switch 5, a rectifier bridge 2, a voltage detection unit 3 and a discharge cell 4.
Wherein adopt said permanent magnet synchronous motor 1 as electrical motor in the present embodiment, and produce alternating current through motion with elevator.
Rectifier bridge described in the present embodiment 2 adopts the form of full-bridge rectification that the alternating current that said permanent magnet synchronous motor 1 produces is converted into direct current (DC).Transform modes such as half-bridge rectification can have been adopted in addition as required.Wherein said rectifier bridge 2 has cathode output end 21 and cathode output end 22, and difference output cathode property direct current (DC) and negative polarity direct current (DC).
Adopt switch 5 as opening or close bonded assembly switch element between said permanent magnet synchronous motor 1 and the said rectifier bridge 2 in the present embodiment.
The voltage sample module 31 and voltage comparison module 32 of voltage detection unit described in the present embodiment 3 in comprising second embodiment, also comprise a filtration module 33 and a Voltage stabilizing module 34.
Said voltage sample module 31 comprises variable resistance 311 and 313 and resistance 312 and 314; Said resistance 311 and 312 be connected in series and said cathode output end 21 and cathode output end 22 between, said resistance 313 and 314 also be connected in series and said cathode output end 21 and cathode output end 22 between.Said in addition variable resistance 311 and 313 also is electrically connected with said NE555 type 8 pin time-base integrated circuit chips respectively; Thereby the dc voltage of sampling is provided for said NE555 type 8 pin time-base integrated circuit chips; Wherein can regulate said variable resistance 311 and 313 with said sampled voltage and threshold voltage coupling, thereby guarantee the voltage ratio correctness of said NE555 type 8 pin time-base integrated circuit chips.
Said Voltage stabilizing module 34 as shown in Figure 3 comprises a resistance 341, a zener diode 342 and an electric capacity 343; The positive pole of wherein said zener diode 342 is electrically connected with said cathode output end 21 through said resistance 341; The negative pole of said zener diode 342 is electrically connected with said cathode output end 22, and said electric capacity is parallelly connected with said zener diode 342.Voltage stabilizing module described in the present embodiment 34 keeps the said galvanic voltage of said rectifier bridge 2 outputs, prevents the disconnected and maloperation of erroneous judgement of the subsequent module that said galvanic natural pressure drop causes.Can adopt other forms of mu balanced circuit to realize identical voltage stabilizing function in addition.
Said filtration module 33 is a chemical capacitor, and the positive pole of wherein said chemical capacitor is electrically connected with said cathode output end 21, and the negative pole of said chemical capacitor is electrically connected with said cathode output end 22.The curtage fluctuation of chemical capacitor described in the present embodiment in can the said direct current (DC) of filtering prevent the disconnected and maloperation of subsequent module erroneous judgement that voltage fluctuation causes, and surge of current is to the damage of subsequent module.Can also adopt the filter circuit of other kinds or formation in addition in the present embodiment.
In addition, the discharge module 41 and drive protecting module 42 of discharge cell 4 described in the present embodiment as shown in Figure 3 in comprising second embodiment, also comprise a Voltage stabilizing module 43.
Wherein said drive protecting module 42 is a resistance, limits the electric current that flows into said discharge module 41 through a resistance in this enforcement, thereby prevents the damage to said discharge module 41 of big electric current or surge of current.
Said Voltage stabilizing module 43 as shown in Figure 3 comprises a resistance 431, a zener diode 432 and an electric capacity 433; The positive pole of wherein said zener diode 432 is electrically connected with said discharge module 41, and the negative pole of said zener diode 432 is electrically connected with said cathode output end 22.Said resistance 431 and electric capacity 433 are all parallelly connected with said zener diode 432.Voltage stabilizing module described in the present embodiment 43 keeps the said galvanic voltage of said voltage detection unit 3 outputs, prevents the disconnected and maloperation of erroneous judgement of the subsequent module that said galvanic natural pressure drop causes.Can adopt other forms of mu balanced circuit to realize identical voltage stabilizing function in addition.
Said in addition discharge module 41 resistance 411 and the NMOS pipes 412 of comprising as shown in Figure 3.Wherein said NMOS pipe is as the switch that is communicated with said cathode output end 21 and cathode output end 22; And the drain electrode of said NMOS pipe 412 is electrically connected with said cathode output end 21 through said resistance 411; The source electrode of said NMOS pipe 412 is electrically connected with said cathode output end 22, and the grid of said in addition NMOS pipe 412 is electrically connected with said Voltage stabilizing module 43.Wherein said resistance 411 is a big resistance, thereby when NMOS managed 412 conductings, when promptly discharging, said resistance 411 consumed the direct current (DC) of flow through said cathode output end 21 and cathode output end 22.
The principle of work of present embodiment is following:
At first after elevator malfunctions, the user opens said switch 5 said permanent magnet synchronous motor 1 is electrically connected with said rectifier bridge 2.
Then, after said elevator began freely to descend, the motion of the car of said elevator drove the motion of said permanent magnet synchronous motor 1, thereby said permanent magnet synchronous motor 1 produces alternating current.
Said then rectifier bridge 2 is converted into direct current (DC) through the form of full-bridge rectification with said alternating current.
Curtage fluctuation in the said direct current (DC) of chemical capacitor filtering of after this said filtration module 33.And the resistance 341 in the said Voltage stabilizing module 34, zener diode 342 and the electric capacity 343 common voltages that keep in said cathode output end 21 and the cathode output end 22.
The voltage that said then voltage sample module 31 is gathered between said cathode output end 21 and the cathode output end 22; And will collect voltage and be delivered to said NE555 type 8 pin time-base integrated circuit chips; Wherein regulate said variable resistance 311 and 313 in advance, thereby make the voltage of gathering and the threshold voltage coupling of setting in advance with said NE555 type 8 pin time-base integrated circuit chips through actual needs.
After this said NE555 type 8 pin time-base integrated circuit chips compare said detection voltage and said threshold voltage; If said detection voltage is greater than said threshold voltage, then said NE555 type 8 pin time-base integrated circuit chips are exported a low level to said discharge cell 4.
This moment, said NMOS managed 412 conductings; Thereby cathode output end 21 is electrically connected through resistance 411 with cathode output end 22; And because said resistance 411 is a big resistance, so the consumption of direct current through said cathode output end 21 and cathode output end 22 is on said resistance 411.
Because said galvanic minimizing; Said alternating current also correspondingly reduces; Promptly be equivalent to produce oppositely directed alternating current in the said permanent magnet synchronous motor 1, thereby make said permanent magnet synchronous motor 1 produce oppositely directed torque, and then said permanent magnet synchronous motor 1 is slowed down; The car that therefore said permanent magnet synchronous motor 1 drives said elevator slows down, thereby has realized the restriction to the car descending speed.
After this if said NE555 type 8 pin time-base integrated circuit chip detection voltages less than said threshold voltage, then said NE555 type 8 pin time-base integrated circuit chips are exported a high level to said discharge cell 4.
Said then high level carries out current limliting through the resistance of drive protecting module 42, prevents said NE555 type 8 pin time-base integrated circuit chips output super-high-current and NMOS is managed 412 to cause damage.After this keep said high level through the Voltage stabilizing module 43 that constitutes by resistance 431, zener diode 432 and electric capacity 433, thereby kept closing of said NMOS pipe 412.Therefore the car of permanent magnet synchronous motor 1 and elevator together keeps the movement of falling object at this moment.
After this pairing galvanic voltage of alternating current that said permanent magnet synchronous motor 1 produces progressively rises.Constantly repeat above-mentioned each then and detect actions such as voltage and discharge, thereby make the car of said elevator maintain a stable descending speed, so realized the decline of elevator constant speed.
Elevator slow descending device in the present embodiment passes through to add filtration module and Voltage stabilizing module with respect to first embodiment and second embodiment; Thereby signal stabilization that has kept transmitting between each unit in the said elevator slow descending device and filtering electric current and the fluctuation of voltage in the said signal, thereby prevented the disconnected and maloperation of erroneous judgement potential in said each unit.
Though more than described the specific embodiment of the utility model, it will be understood by those of skill in the art that these only are casehistorys, the protection domain of the utility model is limited appended claims.Those skilled in the art can make numerous variations or modification to these embodiments under the prerequisite of principle that does not deviate from the utility model and essence, but these changes and modification all fall into the protection domain of the utility model.
Claims (8)
1. an elevator slow descending device is characterized in that, said elevator slow descending device comprises:
One electrical motor is through the motion generation alternating current of said elevator;
One rectification unit is used for the alternating current that said electrical motor produces is converted into direct current (DC);
One voltage detection unit is used to detect said galvanic voltage; And
One discharge cell is used for said direct current (DC) discharge;
Also be preset with a threshold voltage in the wherein said voltage detection unit, when said galvanic voltage greater than said threshold cell, said discharge cell discharges said direct current (DC).
2. elevator slow descending device as claimed in claim 1 is characterized in that, said elevator slow descending device also comprises a switch element, is used to open or turn-off the connecting path between said electrical motor and the said rectification unit.
3. the elevator slow descending device described in claim 1 or 2 is characterized in that, said voltage detection unit comprises:
One voltage sample module, said galvanic voltage is used to sample;
One voltage comparison module is preset with a threshold voltage and is used for more said threshold voltage and said galvanic voltage;
Wherein work as said galvanic voltage greater than said threshold voltage, said voltage comparison module is controlled said discharge cell said direct current (DC) is discharged.
4. elevator slow descending device as claimed in claim 3 is characterized in that, said voltage detection unit also comprises a filtration module of the curtage fluctuation that is used for the said direct current (DC) of filtering.
5. elevator slow descending device as claimed in claim 4 is characterized in that, said voltage detection unit also comprises one first Voltage stabilizing module of the said galvanic voltage that is used to keep said rectification unit output.
6. according to claim 1 or claim 2 elevator slow descending device is characterized in that said discharge cell comprises:
One discharge module is used for said direct current (DC) discharge;
One drive protecting module is used to limit the electric current that said voltage detection unit exports said discharge module to.
7. elevator slow descending device as claimed in claim 6 is characterized in that, said discharge cell also comprises one second Voltage stabilizing module of the voltage that is used to keep said voltage detection unit output.
8. elevator slow descending device as claimed in claim 6; It is characterized in that; Said rectification unit has one first mouth and one second mouth; Said discharge module comprises a resistance and a switching transistor, and wherein said resistance, said first mouth and said switching transistor are electrically connected successively, and said switching transistor also is electrically connected with said voltage detection unit and said second mouth respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120233310XU CN202163999U (en) | 2011-07-04 | 2011-07-04 | Slowly descending device of elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120233310XU CN202163999U (en) | 2011-07-04 | 2011-07-04 | Slowly descending device of elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202163999U true CN202163999U (en) | 2012-03-14 |
Family
ID=45799841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120233310XU Withdrawn - After Issue CN202163999U (en) | 2011-07-04 | 2011-07-04 | Slowly descending device of elevator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202163999U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102381602A (en) * | 2011-07-04 | 2012-03-21 | 上海微频莱机电科技有限公司 | Slow descending device of lifting machine |
-
2011
- 2011-07-04 CN CN201120233310XU patent/CN202163999U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102381602A (en) * | 2011-07-04 | 2012-03-21 | 上海微频莱机电科技有限公司 | Slow descending device of lifting machine |
| CN102381602B (en) * | 2011-07-04 | 2014-06-18 | 上海微频莱机电科技有限公司 | Slow descending device of lifting machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120314 Effective date of abandoning: 20140618 |
|
| RGAV | Abandon patent right to avoid regrant |