CN102774719B - Intelligent elevator safety tongs - Google Patents
Intelligent elevator safety tongs Download PDFInfo
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- CN102774719B CN102774719B CN201210224435.5A CN201210224435A CN102774719B CN 102774719 B CN102774719 B CN 102774719B CN 201210224435 A CN201210224435 A CN 201210224435A CN 102774719 B CN102774719 B CN 102774719B
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Abstract
A pair of intelligent elevator safety tongs belongs to the field of mechatronics technology, and is characterized in that the whole set of elevator safety tongs device with adjustable braking force consists of three sets of systems, i.e. a mechanical system, a hydraulic control system and an electric control system. The intelligent elevator safety tongs have the beneficial effects that the braking force can be adjusted; a car can be controlled to stop in a designated floor in the broken cable accidental state; and the damage to a guide rail and a braking block and the maintenance load are small, and the intelligent elevator safety tongs are an upgrade product of the existing elevator mechanical safety tongs.
Description
Technical field
A kind of intelligent elevator safety tongs of the present invention, belong to electromechanical integration technology area, it is the adjustable hydraulic pressure automatic control device of a kind of braking force, overcome the general out of contior drawback of existing elevator safety gear braking procedure, being mainly used on the man lift and cargo lift of vertical lift, is the renewal product of existing elevator machine formula safety tongs.
Background technology
Safety tongs is the important safety of elevator, its Main Function is when elevator is under accident (as disconnected in steel rope) state, safety tongs can make to be clamped on guide rail after lift car emergency braking, thereby prevents that the lift car bottom of falling from causing the generation of passenger's casualty accident in lift car.Just mean that whole lift car is under free falling body state because steel rope is disconnected, consequence is very serious.
The type of existing elevator safety gear:
Elevator safety gear can be divided into instantaneous safety and the large class of progressive safety gear two according to the difference of course of action, and instantaneous safety deceleration and stopping performance is rigidity, and its braking force is instantaneous formation, is divided into two kinds of wedge type and roller-types according to braking device difference.In progressive safety gear braking procedure, braking force progressively forms, and the mildness of deceleration and stopping performance is slightly better than instantaneous formula, but complex structure, fault rate is high, and practical engineering application is less.
The structure of existing instantaneous safety:
Instantaneous safety is by clamp block, voussoir, lifting rod and be arranged on the parts such as link mechanism in the middle of car upper crossbeam and form, voussoir is assembled in clamp block, car is each side installed a set of, safety tongs jaw blocks respectively on the guide rail that is arranged on the vertical shaft left and right sides, and two cover clamp blocks are connected by lifting rod and link mechanism.In elevator normal operation situation, safety tongs is failure to actuate, and voussoir does not contact with guide rail, and voussoir and working face of guide rail keep the gap of 2 ~ 3 mm, require the necessary homogeneous phase of two side clearances same, otherwise in braking procedure, car there will be crooked.
The operating principle of existing instantaneous safety:
Move and make rope-clamping pliers clamp governor rope by velocity limiter, along with car moves downwards, governor rope is mentioned safety tongs link mechanism, by link mechanism pull-up lifting rod, make voussoir upward sliding in clamp block, after voussoir contacts with guide rail, produce rubbing effect, safety tongs is clamped on guide rail car braking is stopped.Braking force is very large, can make car stop immediately, and in car braking procedure, the kinetic energy of car and potential energy are mainly consumed by caliper distortion and the extruding guide rail of safety tongs.
The problem that existing safety tongs exists:
1. brake the position of stopping not optional, under accident condition, car is often braked the centre that rests in two floors, causes difficulty to evacuation passenger and service personnel maintenance.
2. braking procedure is uncontrollable, and braking procedure rigidity is too large, and stopping distance is too short, makes the passenger in car feel to feel bad very much, and the injured accident of passenger even may occur.
3. pair guide rail and voussoir well damage, because braking procedure rigidity is too large, stopping distance is too short, to guide rail and voussoir well damage, overhauling elevator code regulation, braking once must be changed voussoir, and working face of guide rail must pass through strict polishing and reparation.
Summary of the invention
The object of a kind of intelligent elevator safety tongs of the present invention is: solve in above-mentioned prior art ubiquity by the non-adjustable series of problems bringing of braking force, thereby disclose the technical scheme of the adjustable elevator safety gear of a kind of braking force, this device can be applicable to the special operation condition conditions such as high-rise man lift and cargo lift.
A kind of intelligent elevator safety tongs of the present invention, it is characterized in that the device of the adjustable elevator safety gear of a kind of braking force, package unit is by machinery, fluid control and electrical control three cover system compositions, described mechanical system is made up of left brake equipment and right brake equipment, wherein left rail 1 and right guide rail 2 are original car guide rails, be processed with tooth bar at left rail 1 top, tooth bar is as the foundation of speed sensor 19 measuring speeds, described left brake equipment is by left clamp block 3, left slipper 5, left hydraulic ram 7 forms, when installation, left rail 1 embeds in the jaw of left clamp block 3, left slipper 5 is connected with the piston rod of left hydraulic ram 7, when braking, the piston rod of left hydraulic ram 7 moves forward and promotes left slipper 5 and contact the driving surface of left rail 1, when brake off, the piston rod of left hydraulic ram 7 is mobile backward pulls left slipper 5 to leave the driving surface of left rail 1, right brake equipment is by right clamp block 4, right slipper 6, right hydraulic ram 8 forms, when installation, right guide rail 2 embeds in the jaw of right clamp block 4, right slipper 6 is connected with the piston rod of right hydraulic ram 8, when braking, the piston rod of right hydraulic ram 8 moves forward and promotes right slipper 6 and contact the driving surface of right guide rail 2, when brake off, the piston rod of right hydraulic ram 8 is mobile backward pulls right slipper 6 to leave the driving surface of right guide rail 2, described hydraulic control system is made up of hydraulic oil pump 14, energy storage 13, pressure relay 12, electromagnetic valve 11, proportional overflow pressure-modulation valve 10, three position four-way directional control valve 9, left hydraulic ram 7 and right hydraulic ram 8, wherein energy storage 13 is the hydraulic oil for laying in enough pressure, and making has foot to press enough hydraulic oil for hydraulic efficiency pressure system in braking procedure, described electric control system is by Programmable Logic Controller 16, digital quantity input module 17, analog output module 18, speed sensor 19, pressure relay 12 and motor contactless switch 301, solenoid relay valve 302, three position four-way directional control valve left lateral relay 303, three position four-way directional control valve right lateral relay 304 and the lift car relay 305 that opens the door forms, Programmable Logic Controller 16 is used for controlling electromagnetic valve 11, proportional overflow pressure-modulation valve 10, three position four-way directional control valve 9 and Oil pump electrical machinery 15, wherein speed sensor 19 is arranged on the top of left braking clamp block 3, the corresponding left rail 1 of induction head is with the top of tooth bar, the speed digital signal of speed sensor 19 is delivered to Programmable Logic Controller 16 through digital quantity input module 17, the analog quantity output signals of Programmable Logic Controller 16 is carried out pressure adjusting through analog output module 18 control ratio oil pressure relief control cocks 10, pressure relay 12 is the pressure for controlling energy storage 13 hydraulic oil, under reaching, the pressure of energy storage 13 hydraulic oil starts Oil pump electrical machinery 15 in limited time, reach and stop Oil pump electrical machinery 15 in limited time, make within the pressure of energy storage 13 hydraulic oil remains at the upper limit and lower range.
A kind of intelligent elevator safety tongs of the present invention has following features compared with existing elevator safety gear:
1. braking force is adjustable;
2. pair guide rail and slipper damage are little, and maintenance load is little;
3. under rope-broken accident state, can control car stops in designated floor.
Brief description of the drawings
Fig. 1 intelligent elevator safety tongs fluid control schematic diagram
1. right hydraulic ram 9. three position four-way directional control valve 10. proportional overflow pressure-modulation valve 11. electromagnetic valves of the left hydraulic ram 8. of the right slipper 7. of the left slipper 6. of the right clamp block 5. of the left clamp block 4. of the right guide rail 3. of left rail 2.
12. pressure relay 13. energy storage 14. hydraulic oil pump 15. Oil pump electrical machineries
Fig. 2 intelligent elevator safety tongs electric control theory figure
16. Programmable Logic Controller 17. digital quantity input module 18. analog output module 19. speed sensors
201. brake off button 202. recovery button 203. pressure relay upper limit contacts
204. pressure relay lower limit contact 205. one deck leveling switch
301. motor contactless switch 302. solenoid relay valve 303. three position four-way directional control valve left lateral relays
The 304. three position four-way directional control valve right lateral relay 305. lift cars relay that opens the door.
Specific embodiments
embodiment 1:
The application of a kind of intelligent elevator safety tongs of the present invention on elevator, package unit is arranged on the top front and back midways location (original safety tongs is laid down) of lift car, left rail 1 embeds in the jaw of left braking clamp block 3, and right guide rail 2 embeds in the jaw of right braking clamp block 4 (seeing accompanying drawing 1).Speed sensor 19 is arranged on the top of left braking clamp block 3, and the corresponding left rail 1 of its induction head is with the top of tooth bar.
Elevator is under normal operating condition, and the braking of lift car stops shutting down through original control system control traction machine by original leveling switch, simultaneously original control system control traction machine itself with electromagnetic brake brake.The speed signal that now speed sensor 19 is measured does not transfinite, and a kind of intelligent elevator safety tongs of the present invention cuts little ice, but a kind of intelligent elevator safety tongs of the present invention is standby all the time.
Illustrate under disconnected steel rope accident condition below in conjunction with accompanying drawing 1 and accompanying drawing 2, a kind of intelligent elevator safety tongs of the present invention is in lift car braking procedure, brake off process and recover the principle of work in virgin state process.
1. braking procedure
Suppose that haulage cable rope-broken accident occurs suddenly elevator in normal course of operation, lift car and traction system depart from completely, whole lift car falls downwards along guide rail with free falling body state, now electric power system is in supply regular power state, the speed signal that speed sensor 19 is measured is input to Programmable Logic Controller 16 through digital input module 17, in the time that speed signal exceedes the upper limit set value (as 120 ﹪ command speves) of Programmable Logic Controller 16, prove really to have occurred rope-broken accident, Programmable Logic Controller 16 is controlled solenoid relay valve 302 adhesive control electromagnetic valves 11 and is opened, three position four-way directional control valve left lateral relay 303 adhesive control three position four-way directional control valve 9 left lateral simultaneously, Programmable Logic Controller 16 through analog output module 18 control ratio oil pressure relief control cocks 10 in top pressure state of a control, hydraulic oil in energy storage 13 flows out under pressure, the hydraulic oil flowing out from energy storage 13 is through electromagnetic valve 11, after proportional overflow pressure-modulation valve 10 and three position four-way directional control valve 9, be divided into left and right two-way, wherein left road flows to left hydraulic ram 7, the piston rod of left hydraulic ram 7 moves forward and promotes left slipper 5 driving surface that contacts left rail 1 and brake.Simultaneously right wing flows to right hydraulic ram 8, and the piston rod of right hydraulic ram 8 moves forward and promotes the driving surface that right slipper 6 contacts right guide rail 2 and brake.The speed signal of measuring when speed sensor 19 is during lower than the lower limit set value (as 20 ﹪ command speves) of Programmable Logic Controller 16, the potential energy and the kinetic energy overwhelming majority that prove whole lift car in braking procedure have obtained release, and likely there is locking phenomenon, now Programmable Logic Controller 16 control ratio oil pressure relief control cocks 10 reduce the pressure of left hydraulic ram 7 and right hydraulic ram 8 hydraulic oil, lift car is slowly slided to escalator one deck with low speed (as 20 ﹪ command speves), while approaching escalator one deck, original one deck leveling switch 205 closures, Programmable Logic Controller 16 control ratio oil pressure relief control cocks 10 strengthen the pressure of left hydraulic ram 7 and right hydraulic ram 8 hydraulic oil, lift car is braked completely to the gangway place that rests in escalator one deck, simultaneously Programmable Logic Controller 16 is controlled lift car relay 305 adhesives of opening the door, open elevator cab door, so that passenger evacuation and maintainer's maintenance.
2. brake off process
After maintenance work finishes, press brake off button 201, Programmable Logic Controller 16 is controlled three position four-way directional control valve right lateral relay 304 adhesive control three position four-way directional control valve 9 right laterals, the hydraulic oil flowing out from energy storage 13 is through electromagnetic valve 11, after proportional overflow pressure-modulation valve 10 and three position four-way directional control valve 9, be divided into left and right two-way, wherein left road flows to left hydraulic ram 7, the piston rod of left hydraulic ram 7 is mobile backward pulls left slipper 5 to leave the driving surface of left rail 1, right wing flows to right hydraulic ram 8 simultaneously, the piston rod of right hydraulic ram 8 is mobile backward pulls right slipper 6 to leave the driving surface of right guide rail 2.Brake off process finishes.
3. recover virgin state process
Press recovery button 202, Programmable Logic Controller 16 is controlled solenoid relay valve 302 and is disconnected, and controls electromagnetic valve 11 and closes, and three position four-way directional control valve right lateral relay 304 disconnects simultaneously, controls three position four-way directional control valve 9 and closes.If it is in limited time lower that the pressure of energy storage 13 hydraulic oil reaches, pressure relay lower limit contact 204 closures, Programmable Logic Controller 16 is controlled 301 adhesives of motor contactless switch, motor 15 rotarily drives oil pump 14 to energy storage 13 pressurisings, reach in limited time, pressure relay upper limit contact 203 closures, Programmable Logic Controller 16 is controlled motor contactless switch 301 and is disconnected, hydraulic oil pump 14 stops operating, and makes within the pressure of energy storage 13 hydraulic oil remains at the upper limit and lower range.Recovering virgin state process finishes.
Claims (1)
1. an intelligent elevator safety tongs, it is the device of the adjustable elevator safety gear of a kind of braking force, package unit is by machinery, fluid control and electrical control three cover system compositions, described mechanical system is made up of left brake equipment and right brake equipment, wherein left rail (1) and right guide rail (2) are original car guide rails, described left brake equipment is by left clamp block (3), left slipper (5), left hydraulic ram (7) composition, left rail when installation (1) embeds in the jaw of left clamp block (3), left slipper (5) is connected with the piston rod of left hydraulic ram (7), when braking, the piston rod of left hydraulic ram (7) moves forward the driving surface that promotes left slipper (5) contact left rail (1), when brake off, the piston rod of left hydraulic ram (7) is mobile backward pulls left slipper (5) to leave the driving surface of left rail (1), right brake equipment is by right clamp block (4), right slipper (6), right hydraulic ram (8) composition, when installation, right guide rail (2) embeds in the jaw of right clamp block (4), right slipper (6) is connected with the piston rod of right hydraulic ram (8), when braking, the piston rod of right hydraulic ram (8) moves forward and promotes right slipper (6) and contact the driving surface of right guide rail (2), when brake off, the piston rod of right hydraulic ram (8) is mobile backward pulls right slipper (6) to leave the driving surface of right guide rail (2), described hydraulic control system is made up of hydraulic oil pump (14), energy storage (13), pressure relay (12), electromagnetic valve (11), proportional overflow pressure-modulation valve (10), three position four-way directional control valve (9), left hydraulic ram (7) and right hydraulic ram (8), wherein energy storage (13) is the hydraulic oil for laying in enough pressure, and making has foot to press enough hydraulic oil for hydraulic efficiency pressure system in braking procedure, the speed digital signal of speed sensor (19) is delivered to Programmable Logic Controller (16) through digital quantity input module (17), the analog quantity output signals of Programmable Logic Controller (16) is carried out pressure adjusting through analog output module (18) control ratio oil pressure relief control cock (10), pressure relay (12) is the pressure for controlling energy storage (13) hydraulic oil, under reaching, the pressure of energy storage (13) hydraulic oil starts Oil pump electrical machinery (15) in limited time, reach and stop Oil pump electrical machinery (15) in limited time, make within the pressure of energy storage (13) hydraulic oil remains at the upper limit and lower range, it is characterized in that being processed with tooth bar at left rail (1) top, tooth bar is as the foundation of speed sensor (19) measuring speed, described electric control system is by Programmable Logic Controller (16), digital quantity input module (17), analog output module (18), speed sensor (19), pressure relay (12) and motor contactless switch (301), solenoid relay valve (302), three position four-way directional control valve left lateral relay (303), open the door relay (305) composition of three position four-way directional control valve right lateral relay (304) and lift car, Programmable Logic Controller (16) is used for controlling electromagnetic valve (11), proportional overflow pressure-modulation valve (10), three position four-way directional control valve (9) and Oil pump electrical machinery (15), wherein speed sensor (19) is arranged on the top of left braking clamp block (3), the induction corresponding left rail of head (1) is with the top of tooth bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210224435.5A CN102774719B (en) | 2012-07-02 | 2012-07-02 | Intelligent elevator safety tongs |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210224435.5A CN102774719B (en) | 2012-07-02 | 2012-07-02 | Intelligent elevator safety tongs |
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| CN102774719A CN102774719A (en) | 2012-11-14 |
| CN102774719B true CN102774719B (en) | 2014-07-09 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103381984A (en) * | 2013-07-31 | 2013-11-06 | 杨石红 | Elevator braking system |
| EP3145847B1 (en) * | 2014-05-20 | 2021-10-20 | Wittur Holding GmbH | Hydraulic elevator car brake unit with controllable braking power |
| CN104355199B (en) * | 2014-10-23 | 2016-06-15 | 太原理工大学 | A kind of flexible cage guide Based Intelligent Control catching device |
| CN105293248B (en) * | 2015-10-10 | 2018-11-27 | 福州市长乐区存量科技有限公司 | A kind of trigger device of material elevator anti-falling safety device |
| CN106315332B (en) * | 2016-09-21 | 2019-02-15 | 广东德奥电梯科技有限公司 | Safe forceps system with vibration hydraulic power source and pneumatic limiter of speed |
| CN106348124B (en) * | 2016-09-21 | 2019-03-05 | 广东德奥电梯科技有限公司广西分公司 | Safe forceps system with vibration hydraulic power source |
| CN107857180A (en) * | 2017-11-28 | 2018-03-30 | 广东省特种设备检测研究院珠海检测院 | A kind of detecting system and method for accidental movement of elevator cage defencive function |
| DE102018009620A1 (en) * | 2018-12-07 | 2020-06-10 | Chr. Mayr Gmbh + Co. Kg | Brake, valve arrangement and method for controlling a brake |
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| US4761953A (en) * | 1984-04-18 | 1988-08-09 | Dynamic Hydraulic Systems, Inc. | Hydraulic elevator mechanism |
| CN1109442A (en) * | 1993-10-18 | 1995-10-04 | 英万蒂奥股份公司 | Safety equipment for a lift cage |
| US6347515B1 (en) * | 1997-12-29 | 2002-02-19 | Hydraulic Inventions Bv | Hydraulic lift actuating device |
| CN1817611A (en) * | 2006-03-07 | 2006-08-16 | 太原理工大学 | Injection machine system with electromechanical liquid composite control |
| CN201857238U (en) * | 2010-11-08 | 2011-06-08 | 中信重工机械股份有限公司 | Constant deceleration safety braking system for mine hoist |
| CN102514992A (en) * | 2011-12-22 | 2012-06-27 | 广州市特种机电设备检测研究院 | Testing experimental device for traction machines |
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2012
- 2012-07-02 CN CN201210224435.5A patent/CN102774719B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4761953A (en) * | 1984-04-18 | 1988-08-09 | Dynamic Hydraulic Systems, Inc. | Hydraulic elevator mechanism |
| CN1109442A (en) * | 1993-10-18 | 1995-10-04 | 英万蒂奥股份公司 | Safety equipment for a lift cage |
| US6347515B1 (en) * | 1997-12-29 | 2002-02-19 | Hydraulic Inventions Bv | Hydraulic lift actuating device |
| CN1817611A (en) * | 2006-03-07 | 2006-08-16 | 太原理工大学 | Injection machine system with electromechanical liquid composite control |
| CN201857238U (en) * | 2010-11-08 | 2011-06-08 | 中信重工机械股份有限公司 | Constant deceleration safety braking system for mine hoist |
| CN102514992A (en) * | 2011-12-22 | 2012-06-27 | 广州市特种机电设备检测研究院 | Testing experimental device for traction machines |
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