CN203545378U - Buffering and braking device of elevator cab not meeting retention working condition - Google Patents

Buffering and braking device of elevator cab not meeting retention working condition Download PDF

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Publication number
CN203545378U
CN203545378U CN201320666824.3U CN201320666824U CN203545378U CN 203545378 U CN203545378 U CN 203545378U CN 201320666824 U CN201320666824 U CN 201320666824U CN 203545378 U CN203545378 U CN 203545378U
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CN
China
Prior art keywords
elevator
buffer
lift car
meet
operating mode
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Withdrawn - After Issue
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CN201320666824.3U
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Chinese (zh)
Inventor
蔡状
秦健聪
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Dongnan Elevator Co Ltd
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Dongnan Elevator Co Ltd
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Application filed by Dongnan Elevator Co Ltd filed Critical Dongnan Elevator Co Ltd
Priority to CN201320666824.3U priority Critical patent/CN203545378U/en
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Publication of CN203545378U publication Critical patent/CN203545378U/en
Withdrawn - After Issue legal-status Critical Current
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Abstract

The utility model relates to a buffering and braking device of an elevator cab not meeting the retention working condition. The buffering and braking device comprises an elevator buffer and an action detection switch, wherein the elevator buffer is arranged on the top of an elevator shaft, and the action detection switch is used for detecting whether the elevator buffer acts or not. A buffer striking plate is arranged on the top of the elevator cab. A wiring loop of the action detection switch is connected with a main driving loop of a traction motor. When the elevator cab does not meet the safety retention working condition during running, the buffer striking plate will slowly strike the elevator buffer, the elevator cab is prevented from moving upwards and stopped slowly, and the elevator enters the safety retention working condition. According to the buffering and braking device of the elevator cab not meeting the retention working condition, the danger that the elevator cab runs upwards and rushes to the top when a traditional elevator system cannot meet the elevator cab retention working condition is eliminated, the probability of the accident that the elevator cab rushes to the top is eradicated, and the safety of the elevator cab and the safety of persons are protected; meanwhile, according to the technical scheme, a traction machine with the larger bearing capacity does not need to be replaced, and technical bases and guarantees are provided for the light-weight trend of the design of the elevator cab.

Description

Do not meet and be detained lift car buffer brake device under operating mode
Technical field
The utility model relates to a kind of lift car buffer brake device, and this device is applicable to towed elevator cage operation to well headroom and does not meet the preventing colliding with top protection while being detained operating mode.
Background technology
At present, the great majority that drag of elevator are tractive driving, it is friction-driven, its principle is: steel rope is walked around on traction sheave, and in traction sheave both sides respectively by steel wire hang lift car and Elevator weight sensor, the gravity of car and counterweight produces pressure by the transmission of steel rope to traction sheave, and then forms enough large friction force.When traction sheave rotates, because very large friction force drives the steel rope hanging, move up and down, thereby lift car is moved up and down.When a side mounting lift car goes upward to hoistway top, the Elevator weight sensor that opposite side hangs must move to lowermost end and be pressed in completely on the counterweight buffer of bottom, now the gravity of counterweight does not produce pressure to traction sheave, be the downward gravity that traction sheave is only subject to hanging the one-sided transmission of lift car, it is very little that the friction force being subject on this traction sheave also becomes, traction sheave continues when up, traction sheave rotation can overcome the friction force that the upper steel rope of wheel produces, thereby cause steel rope on traction sheave, to produce skidding, the now up rotation of traction sheave but the steel rope that hangs is motionless, be that lift car is motionless, thereby the further up accident of rushing to summit that causes of lift car while having prevented that elevator from moving to elevator hoistways top and counterweight completely densified energy disperser.This operating mode of elevator just makes elevator operation be detained operating mode.In fact can the operation of elevator delay operating mode meet with lift car and the ratio of the gravity of counterweight relation.Referring to GB GB7588-2003 appendix M: traction is calculated must be with formula below:
For car, load and emergency braking operating mode: ;
For car, be detained operating mode (counterweight is pressed in energy disperser, the rotation of towing machine upward direction): .
In formula:
The end of e-Napier's logarithm;
The equivalent coefficient of friction of f-traction steel-cable in grooving;
the cornerite of-traction steel-cable on rope sheave;
T1, the pulling force that T2-traction sheave both sides traction steel-cable is subject to.(maxim that T1 is both sides)
In above-mentioned formula, e, for definite value, f also can determine by calculating.Whether meet and be detained the force rate that operating mode need be seen T1 and T2.Elevator is generally all to design by this, and real-world operation also all meets the condition of being detained operating mode.But along with the increasing of hoisting depth of elevator or the design of car lightness more and more, the weight of relative hoisting cable self is increasing and can not ignore, when car goes upward to well headroom and counterweight and is pressed on energy disperser, sometimes through calculating, can find that suspension is even suitable with the deadweight of car to the weight of the steel rope of heavy side, now just can not meet the delay operating mode of elevator operation, when if traction sheave continues upwards to rotate, because the excessive steel rope of friction force can not skid on traction sheave, cage side lifts steel rope and can upwards rotate and continue up along with traction sheave, the accident thereby generation car is rushed to summit.Case: lifting height of lift is 200 meters, traction promotes the traction steel-cable that adopts 6 Ф 8 diameters, and the deadweight of steel rope is 0.218kg/m, and car deadweight is 695kg, when car no-load run to well headroom and counterweight is pressed on energy disperser completely, through calculating =3.2831, the deadweight of heavy side steel rope, for 261kg (6*0.218*200), is drawn according to formula = =2.66< =3.2831, do not meet elevator safety be detained operating mode ( ) requirement, steel rope can not skid on traction sheave, but continues uply along with upwards rotating of traction sheave, lift car continues uply, and the up accident of rushing to summit of lift car will occur.Must take measures to eliminate this kind of non-security state.Conventional measure is to adopt the method that increases car deadweight, makes the ratio of T1 and T2 meet and be detained operating mode, but problem has just been come like this, car deadweight strengthens inevitable counterweight deadweight also to be needed to strengthen, and traction motor axle carries and must strengthen, at this moment just must calculate the load-carrying capacity of towing machine, if the actual loading of calculating is greater than motor rated load, nominal load, need to reselect and be replaced by the towing machine that load-carrying capacity is larger, will produce two drawbacks: (1) power energy dissipation, the towing machine standardized product that is likely larger load-carrying capacity does not have, and needs nonstandard customized yet.(2) disagree with the trend of current car lightness fuel saving design.
Summary of the invention
The problem existing for solving above-mentioned prior art, the utility model provides a kind of lift car buffer brake device being detained under operating mode that do not meet, when elevator cage operation is to well headroom and while meet not being detained operating mode, by the utilization of this device, the stressed of car changed, force car to enter safety and be detained operating mode, thereby avoid the further up accident of rushing to summit of car.
The purpose of this utility model adopts following technical scheme to realize:
A kind of device that does not meet lift car buffer-braking under delay operating mode, described elevator is driven by traction motor, lift car and counterweight are suspended on respectively the traction steel-cable two ends of walking around traction sheave, the elevator hoistways bottom of Elevator weight sensor operation arranges counterweight buffer, and lift car is T with the ratio of the gravity of counterweight 1/ T 2, when time, meet elevator safety and be detained working condition requirement, under described satisfied delay operating mode, lift car buffer brake device is characterised in that: corresponding elevator cage operation to the elevator hoistways tip position in elevator hoistways top of described elevator operation arranges a buffer of elevator and an action detection switch whether moving for detection of this buffer of elevator; Described elevator car roof arranges buffer striking plate, and the connection circuit of described action detection switch is connected with the driving major loop of described traction motor.
Above-mentioned the utility model provides meet not to be detained lift car buffer brake device under operating mode, adopts and is installed on a buffer of elevator at elevator hoistways top, a buffer striking plate that is installed on elevator car roof is realized above-mentioned preventing colliding with top protection.When counterweight completely densified is on counterweight buffer and when lift car continuation upwards moves again satisfied safety delay operating mode, the buffer striking plate that is installed on sedan-chair top can slowly clash into the buffer of elevator that is installed on elevator hoistways top, make lift car slowly compacting on the buffer of elevator at elevator hoistways top, lift car is up to be subject to stoping and the slow stop of quilt, when traction sheave continues upwards to rotate, along with lift car is up, be subject to the increase of resistance, lift car promotes traction steel-cable natural will generation on traction sheave and skids, at this moment , meet the requirement that elevator safety is detained operating mode, thereby enter safety, be detained operating mode, it is motionless that lift car keeps, and prevented the accident of rushing to summit, and guaranteed car and personnel's safety.Simultaneously, be installed on action detection switch on the buffer of elevator at elevator hoistways top along with lift car slowly acts on buffer of elevator and trigger action, thereby disconnect the power supply of traction motor, prevent that traction sheave continuous operation and steel rope from skidding continuously, further guaranteed equipment and personnel's safety
The above-mentioned feature that does not meet lift car buffer brake device under delay operating mode is also: described buffer of elevator is connected with piston butt plate.
Further, the feature that does not meet lift car buffer brake device under delay operating mode described in the utility model is also: described buffer of elevator and buffer striking plate arrange energy disperser protection mechanism outward.
Preferably, described energy disperser protection mechanism is arranged on described elevator car roof.
Described elevator hoistways top arranges hoistway crossbeam, and described buffer of elevator is fixed on this hoistway crossbeam.
Preferably, described hoistway crossbeam is arranged on the car guide rail at described elevator hoistways top.
Preferably, described buffer of elevator is arranged on the hoistway crossbeam at described elevator hoistways top by buffer base.
Described buffer striking plate is fixed on sedan-chair head piece by hitting plate base.
Described energy disperser protection mechanism is energy disperser protective cover, and this energy disperser protective cover is fixed on sedan-chair head piece by hitting plate base, and described buffer striking plate and buffer of elevator are enclosed in wherein by this energy disperser protective cover.
Further, described energy disperser protective cover adopts metal sheet to make.
Lift car buffer brake device under operating mode is detained in not meeting that the utility model provides; when having got rid of traditional elevator systems and cannot meet car and be detained operating mode, car continues the danger that upwards operation is rushed to summit; guaranteed that lift car under any circumstance can enter safety and be detained operating mode; stopped the rush to summit possibility of accident of car; protected equipment and personnel's safety; simultaneously; the technical solution of the utility model need not be changed the towing machine that load-carrying capacity is larger, also for car designs further lightness, provides technical basis and guarantee.
Accompanying drawing explanation
Fig. 1 is the structural front view of the related parts of the utility model embodiment installation site in elevator hoistways;
Fig. 2 is that Figure 1A-A is to upward view;
Fig. 3 is that Figure 1B-B is to birds-eye view.
description of reference numerals
1-hoistway crossbeam, 2-buffer base, 3-action detection switch, 4-buffer of elevator, 5-buffer striking plate, 6-sedan-chair head piece, 7-energy disperser protective cover, 8-piston butt plate, 9-car guide rail support, 10-piston head switch re-packs, 11-car guide rail, 12-hits plate base, 13-lift car, 14-elevator hoistways.
the specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present utility model is further described:
The present embodiment elevator is driven by traction motor, and lift car and counterweight are suspended on respectively the traction steel-cable two ends of walking around traction sheave, and the elevator hoistways bottom of Elevator weight sensor operation arranges counterweight buffer, and lift car is T with the ratio of the gravity of counterweight 1/ T 2, when time, meeting elevator safety and be detained working condition requirement, corresponding elevator cage operation to the elevator hoistways tip position in elevator hoistways top of described elevator operation arranges a buffer of elevator and an action detection switch whether moving for detection of this buffer of elevator, described elevator car roof arranges buffer striking plate, the connection circuit of described action detection switch is connected with the driving major loop of described traction motor, when described counterweight compacting is on the counterweight buffer of elevator hoistways bottom and when lift car continuation upwards moves again satisfied safety delay operating mode, the buffer striking plate that is arranged at described elevator car roof can slowly clash into the buffer of elevator that is arranged at described elevator hoistways top, make lift car compacting on the buffer of elevator at described elevator hoistways top, lift car is up to be subject to stoping and the slow stop of quilt, along with up resistance is increasing, must meet condition, steel rope skids on traction sheave, and elevator enters safety and is detained operating mode, described electric detector switch is along with lift car slowly acts on buffer of elevator and trigger action, thus the power supply of disconnection traction motor.
Buffer of elevator is connected with piston butt plate, when described counterweight compacting is on the counterweight buffer of elevator hoistways bottom and when lift car continuation upwards moves again satisfied safety delay operating mode, the buffer striking plate that is arranged at described elevator car roof can slowly clash into the buffer of elevator that is arranged at described elevator hoistways top by the piston butt plate being connected with described buffer of elevator, make lift car compacting on the buffer of elevator at described elevator hoistways top, up being subject to of lift car stops and stop, along with the increase of up resistance, met condition, elevator enters safety and is detained operating mode.
Buffer of elevator and buffer striking plate arrange energy disperser protection mechanism outward; the vertical space that the buffer striking plate that is installed on elevator car roof is approached with the buffer of elevator that is installed on elevator hoistways top and occur to clash into is surrounded; the any part that prevents sedan-chair top personnel's health stretches into or touches the injuries such as shearings that are squeezed of this vertical space, thereby protects the personnel's such as sedan-chair top installation and maintenance safety.
Below not meet the embodiment that is detained the device of lift car buffer-braking under operating mode, refer to Fig. 1 to Fig. 3, because the related parts of the utility model are installed on lift car and well headroom cage side guide rail, so counterweight side rails and heavy parts is not all drawn in the drawings.The interior installation car guide rail of elevator hoistways 14 support 9, car guide rail 11 is fixed on car guide rail support 9, and lift car 13 is along car guide rail 11 operations.Described elevator is driven by traction motor, and lift car 13 and counterweight are suspended on respectively the traction steel-cable two ends of walking around traction sheave, and elevator hoistways 14 bottoms of Elevator weight sensor operation arrange counterweight buffer, and lift car 13 is T with the ratio of the gravity of counterweight 1/ T 2, when time, meet elevator safety and be detained working condition requirement.
On car guide rail 11, near elevator hoistways 14 tip positions, hoistway crossbeam 1 is installed, buffer base 2 is installed in hoistway crossbeam 1 bottom, buffer of elevator 4 is arranged on this buffer base 2, and buffer of elevator 4 adopts has re-pack 10 elevator industry known products of action detection switch 3, piston butt plate 8 and piston head switch.Wherein action detection switch 3 connection circuits are connected with the driving major loop of described traction motor.Buffer of elevator 4 is connected with piston butt plate 8, and piston head switch re-packs and 10 is arranged on piston butt plate 8.When buffer of elevator 4 is subject to clashing into compression, piston butt plate 8 upward movements that are attached thereto, the piston head switch being arranged on piston butt plate 8 re-packs 10 along with upwards clashing into action detection switch 3, action detection switch 3 action that is triggered, thus the power supply of the traction motor being attached thereto disconnected.
Described lift car 13 tops arrange buffer striking plate 5, and this buffer striking plate 5 is fixed on sedan-chair head piece 6 by hitting plate base 12.
Buffer of elevator 4 and buffer striking plate 5 are outer need to arrange energy disperser protection mechanism.Preferably, energy disperser protection mechanism is arranged on to described lift car 13 tops.In the present embodiment, described energy disperser protection mechanism is the energy disperser protective cover 7 that adopts metal sheet to make, for preventing staff or entering in energy disperser protective cover 7 and cause injury to personnel, energy disperser protective cover 7 should adopt the metal sheet of smooth atresia to make compared with little object.Energy disperser protective cover 7 is fixed on sedan-chair head piece 6 by hitting plate base 12, and buffer striking plate 5 and buffer of elevator 4 is enclosed in wherein by this energy disperser protective cover 7 simultaneously.The space encloses that when energy disperser protective cover 7 moves buffer striking plate 5 with buffer of elevator 4, lift car 13 top personnel can touch, the height of energy disperser protective cover 7 surpasses 2 meters conventionally, has protected the personnel's such as sedan-chair top installation and repairing safety.
Lift car 13 is interior up and down when normal operation is stopped at elevator hoistways 14, and buffer striking plate 5 touches never and acts on buffer of elevator 4.Only under abnormal condition, lift car 13 is up crosses the position of normally stopping, hoistway 14 tops, cause counterweight completely densified on counterweight buffer and continue when up, if elevator continuation is up, can not meet car safety delay operating mode, the buffer striking plate 5 being installed on sedan-chair head piece 6 moves closer to and passes through piston butt plate 8 shocks and compress buffer of elevator 4 along with up, and finally slowly compacting is on buffer of elevator 4, lift car 13 is up to be obstructed by slow stop.Along with the up increase that is subject to resistance of lift car 13, the traction steel-cable that lifts lift car 13 is increasing along with traction sheave continues the resistance that up rotation is subject to, until traction steel-cable skids on traction sheave, at this moment , meeting lift car and be detained safely operating mode, lift car 13 keeps motionless, and piston head switch re-packs 10 along with buffer of elevator 4 upwards compresses 3 actions of trigger action detector switch simultaneously, disconnects traction motor power supply, stops traction motor continuous operation.
Above-described is only preferred implementation of the present utility model.Should be understood that; for the person of ordinary skill of the art; without departing from the concept of the premise utility; can also make some modification and improvement; for example; buffer of elevator 4 is directly installed on to lift car 13 tops, or buffer striking plate 5 is directly installed on to elevator hoistways 14 tops etc., these also should be considered as belonging to protection domain of the present utility model.

Claims (8)

1. one kind does not meet the device that is detained lift car buffer-braking under operating mode, described elevator is driven by traction motor, lift car and counterweight are suspended on respectively the traction steel-cable two ends of walking around traction sheave, the elevator hoistways bottom of Elevator weight sensor operation arranges counterweight buffer, and lift car is T with the ratio of the gravity of counterweight 1/ T 2, when time, meet elevator safety and be detained working condition requirement, it is characterized in that: the corresponding lift car in elevator hoistways (14) top (13) of described elevator operation moves to elevator hoistways (14) tip position the action detection switch (3) whether one buffer of elevator (4) and moves for detection of this buffer of elevator (4) is set; Described lift car (13) top arranges buffer striking plate (5), and the connection circuit of described action detection switch (3) is connected with the driving major loop of described traction motor.
2. the device that does not meet lift car buffer-braking under delay operating mode according to claim 1, is characterized in that: described buffer of elevator (4) is connected with piston butt plate (8).
3. the device that does not meet lift car buffer-braking under delay operating mode according to claim 1, is characterized in that: the outer energy disperser protection mechanism that arranges of described buffer of elevator (4) and buffer striking plate (5).
4. the device that does not meet lift car buffer-braking under delay operating mode according to claim 3, is characterized in that: described energy disperser protection mechanism is arranged on described lift car (13) top.
5. the device that meet not to be detained lift car buffer-braking under operating mode according to claim 1, it is characterized in that: described elevator hoistways (14) top arranges hoistway crossbeam (1), described buffer of elevator (4) is fixed on this hoistway crossbeam (1).
6. the device that does not meet lift car buffer-braking under delay operating mode according to claim 5, is characterized in that: described hoistway crossbeam (1) is arranged on the car guide rail (11) at described elevator hoistways (14) top.
7. the device that meet not to be detained lift car buffer-braking under operating mode according to claim 3, it is characterized in that: described energy disperser protection mechanism is energy disperser protective cover (7), and described buffer striking plate (5) and buffer of elevator (4) are enclosed in wherein by this energy disperser protective cover (7).
8. the device that does not meet lift car buffer-braking under delay operating mode according to claim 7, is characterized in that: described energy disperser protective cover (7) adopts metal sheet to make.
CN201320666824.3U 2013-10-28 2013-10-28 Buffering and braking device of elevator cab not meeting retention working condition Withdrawn - After Issue CN203545378U (en)

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CN201320666824.3U CN203545378U (en) 2013-10-28 2013-10-28 Buffering and braking device of elevator cab not meeting retention working condition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320666824.3U CN203545378U (en) 2013-10-28 2013-10-28 Buffering and braking device of elevator cab not meeting retention working condition

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CN203545378U true CN203545378U (en) 2014-04-16

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103738809A (en) * 2013-10-28 2014-04-23 东南电梯股份有限公司 Elevator car buffer braking method and device not meeting retention working condition
CN112141840A (en) * 2019-06-27 2020-12-29 上海三菱电梯有限公司 Car roof personnel anti-collision device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103738809A (en) * 2013-10-28 2014-04-23 东南电梯股份有限公司 Elevator car buffer braking method and device not meeting retention working condition
CN103738809B (en) * 2013-10-28 2015-12-09 东南电梯股份有限公司 Do not meet the method for being detained lift car buffer-braking under operating mode and device thereof
CN112141840A (en) * 2019-06-27 2020-12-29 上海三菱电梯有限公司 Car roof personnel anti-collision device

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C14 Grant of patent or utility model
AV01 Patent right actively abandoned

Granted publication date: 20140416

Effective date of abandoning: 20151209

C25 Abandonment of patent right or utility model to avoid double patenting