CN204890996U - Electromagnetic damping self -power high -rise escape device - Google Patents

Electromagnetic damping self -power high -rise escape device Download PDF

Info

Publication number
CN204890996U
CN204890996U CN201520601402.7U CN201520601402U CN204890996U CN 204890996 U CN204890996 U CN 204890996U CN 201520601402 U CN201520601402 U CN 201520601402U CN 204890996 U CN204890996 U CN 204890996U
Authority
CN
China
Prior art keywords
gear
damper
main shaft
take
input gear
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.)
Withdrawn - After Issue
Application number
CN201520601402.7U
Other languages
Chinese (zh)
Inventor
蔡志典
吴亿年
康良溪
王博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201520601402.7U priority Critical patent/CN204890996U/en
Application granted granted Critical
Publication of CN204890996U publication Critical patent/CN204890996U/en
Withdrawn - After Issue legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model provides an electromagnetic damping self -power high -rise escape device, relates to high -rise escape device. The utility model provides a simple structure, installation convenient to use, easy control is balanced, the wide electromagnetic damping self -power high -rise escape device of application scope. Be equipped with bottom plate, lead wire wheel, lead wire wheel mounting, main shaft support frame, main shaft, main shaft mounting, main shaft bearing, take -up pulley, derailleur input gear, derailleur, derailleur support piece, derailleur output gear, one -way bearing, horizontal bearing, derailleur sensing axle, attenuator input gear, attenuator, attenuator backup pad, electromagnetic brake, speed measuring motor input gear, speed measuring motor, control circuit board and battery.

Description

A kind of electromagnetic damping self-powered high-rise escape apparatus
Technical field
The utility model relates to high-rise escape apparatus, especially relates to a kind of electromagnetic damping self-powered high-rise escape apparatus.
Background technology
Along with the progress of society, the increase of population, urban skyscraper is also being increased gradually with intensive.Limited land resource saved by skyscraper, allows more centralization of living.But when the unexpected dangerous situation such as fire, earthquake, gas leak occurs, high-rise life saving has but become a great problem faced by society.According to statistics, the disappearance of high-rise life saving protection is the key reason of the event of creating greater casualties, when high level surprisingly occurs, people can only by elevator or stair escape, but stair are limited, the crowded situation easily causing again danger such as trampling of personnel, it is also the most dangerous for now taking elevator, because when breaking out of fire or earthquake, supply line is easier to be damaged.High-rise construction complexity, densely populated place again, stair, vertical shaft etc. can produce stack effect simultaneously, cause full of smoke, encourage fire spreading, produce serious casualties.Therefore, reduce China's fire in high buildings incidence, protect the security of the lives and property of resident better, become China and ensure that the people live and work in peace and contentment, create the most pressing problem that harmonious society need solve.In order to alleviate this situation, the fire prevention that government can take corresponding measure to improve people on the one hand prevents consciousness, people can be called to configure fire service inventory on the other hand, can stamp out a fire in time or escape after ensureing breaking out of fire or earthquake.Fire-fighting equipment can rescue the height of height far below skyscraper: fire tanker sprinkling fire height is 8 floors, and the highest motor ladder elevates ability only 15 floors.More than 15 layers skyscrapers catch fire, such deliverance apparatus is lack scope for their abilities, even if fire brigade accepts warning the very first time simultaneously, but because the problem such as rescue aid mobility is poor, bulky, road traffic obstruction incurs loss through delay rescue opportunity, and such device rescue ability is limited, during generation wildfire, role is limited.Can resident effectively save oneself becomes the focus of social concerns, therefore, design and produce a light, simple to operate understandable, cost is low, the escape device for high-rise buildings being convenient to deposit is of practical significance very much and social value.
The equipment of masses' self-help escape when high-rise self-rescue escape apparatus is the emergency case such as reply urban skyscraper breaking out of fire.Property is high to use during high-rise escape that escalators can be very dangerous, stair limited space and easily tread event occurs.For this reason, high level is taken refuge from the mode of window, balcony escape becomes better selection, and high-rise self-rescue escape apparatus just arises at the historic moment, and has striven for the time of saving oneself, and reduces the casualty rate of disaster.Design concept and the principle of " people-oriented " to be adhered in the design of high-rise self-rescue survival equipment, coordinate technology, relation between material and people, focus on each side impression of people.
The present Research of domestic escape apparatus: at the beginning of 21 century, lifesaving descent control device just starts to cause people to pay close attention to as a kind of state-of-the-art technology and product.Along with the raising day by day of popular life level, quality of life, life security are also thus lifted to a new high, and equipment falls in practical, economic slow of active demand, and the Performance and quality of descending lifeline also causes the attention of people.The descending lifeline studied that is widely used at home mainly contains frictional damping type and hydraulic damping type two type.
The present Research of external escape apparatus: the eighties in 20th century, first there is " fall-slowing device for rescuing from high building " in Japan---speed is happy to be reached 125 and to take refuge instrument, and the selfrescue equipment development of high-rise escape starts development.After the U.S. 9.11 event occurs, start again the upsurge of the problems such as a ripple " high-rise building life saving, escape ", be proposed the various escape product such as worm and wormwheel type, " family expenses parachute ", bicycle brake type, the soft land of rubber automatic inflating for the moment, even occur a kind of space technology development rocket launcher Backpack type descending lifeline applying high and new technology.Due to unprecedented, the escape product occurred at top speed all due to design imperfection, really cannot play the effect of lifesaving.The speed pleasure of Japan reaches product and there is fatal weakness, uncontrollable decrease speed, and escape personnel still faces life threat when using this product.When escaping, if cannot tackle problems on one's own when running into obstacle or fortuitous event, escape personnel still likely comes to harm.The accumulation of several years experiences and experiment, proving that a good high-rise escape apparatus must possess can the function of control rate and brake.From Japanologies in 1997 and since setting up speed-controlling device, through the development of more than ten years, descending lifeline reaches its maturity, the constantly progress of technical performance and reliability.Fire-extinguishing and lifesaving series products has defined brand alone abroad, and new product continues to bring out, and from small to large, from single rope to many ropes, from wound form to friction-type, from there being level to restrict stepless rope, specification variety protection is complete.Develop into assembly mould blocking from the generalization of parts, the application of the material of high-quality, advanced technique and new and high technology, reach that quality is light, compact conformation, installation be easy to feature, reflect the technical merit of the standardization of products.
There is following shortcoming in escape apparatus product in the market:
1) because most product structure principle is complicated, will be given advice by professional person could be proper use of;
2) portioned product simplicity of design, bearing capacity is limited;
3) product audient face is single, does not consider special population and the situations such as old man, children and disabled person;
4) portioned product cannot work under electroless state, and limitation is large;
5) comfortableness is lacked, and wayward balance.
Summary of the invention
It is simple that the purpose of this utility model is to provide a kind of structure, easy to install, balance easy to control, electromagnetic damping self-powered high-rise escape apparatus applied widely.
For achieving the above object, the utility model adopts following technical scheme:
The utility model is provided with base plate, wire leading wheel, wire leading wheel fixture, main shaft support frame, main shaft, main shaft fixture, main shaft bearing, take-up pulley, transmission input gear, speed changer, speed changer support member, transmission output gear, unilateral bearing, horizontal bearing, speed changer sensing shaft, damper input gear, damper, damper gripper shoe, electromagnetic brake, speed measuring motor input gear, speed measuring motor, control circuit board and battery;
Wire leading wheel is located on wire leading wheel fixture, and backplate surface side is located at by wire leading wheel fixture; Main shaft support frame is fixed on base plate, main shaft is fixed on main shaft support frame by main shaft fixture, take-up pulley is set on main shaft, and by coordinating with main axis with main shaft bearing, take-up pulley is made up of take-up gear and take-up sleeve, take-up gear is fixedly connected with take-up sleeve one end, and take-up gear engages with transmission input gear; Speed changer is fixed on base plate by speed changer support member, transmission input gear is connected with the transmission input being furnished with unilateral bearing, transmission output is furnished with horizontal bearing, and transmission output gear is located at transmission output, and transmission output is as speed changer sensing shaft; Transmission output gear engages with damper input gear, and damper is electromagnetic damper, and damper is fixed on base plate by damper gripper shoe, and electromagnetic brake is located at damper input; Speed measuring motor input gear engages with transmission input gear, and speed changer side is located at by speed measuring motor; Control circuit board and battery are all located on base plate, and control circuit board comprises processor, and the signal input part of processor connects the tachometer signal of speed measuring motor, and the signal output part of processor connects electromagnetic damper and electromagnetic brake.
The gear ratio of described speed changer can be 1:18.
Described wire leading wheel is preferably a pair pair roller.
Described processor can be single-chip microcomputer.
Described battery is preferably lithium battery.
The motor of described electromagnetic damper preferably adopts super-silent dc generator, and rotating speed can be 1200 ~ 4000r/min, and the voltage of generation is 6 ~ 20V.
Described speed changer can adopt model to be the reinforced decelerator of 60GX, runs torque range: 2.0 ~ 30.0N.m.
The technical parameter of described each gear can be selected as follows:
The take-up gear of take-up pulley: modulus: 2, the number of teeth: 120, pressure angle: 20, the facewidth: 10mm, diameter: 244mm;
Transmission input gear: modulus: 2, the number of teeth: 25, pressure angle: 20, the facewidth: 10mm, diameter: 54mm;
Transmission output gear: modulus: 2, the number of teeth: 25, pressure angle: 20, the facewidth: 10mm, diameter: 54mm;
Damper input gear: modulus: 2, the number of teeth: 40, pressure angle: 20, the facewidth: 10mm, diameter: 84mm;
Speed measuring motor input gear: modulus: 2, the number of teeth: 25, pressure angle: 20, the facewidth: 10mm, diameter: 54mm.
The utility model should be equipped with escaping rope when using, and escaping rope preferably adopts high-strength polyethylene fiber, and can bear maximum pull is 600Kg power, its strength ratio carbon fiber high twice, is the fiber that intensity is the highest in the world at present; Line density: 0.96 is lighter than water; Anti-cutting, strong mechanical property; Smooth surface, coefficient of friction is low, not easily fluffs; Elongation at break: 3.5%, flexural fatigue comparatively Kevlar is good; Corrosion resistance is extremely strong.Have lightweight, the features such as spy is soft, easy to operate.
Compared with the prior art, the beneficial effects of the utility model are as follows:
The utility model adopts the structure of gear drive and speed change conversion (as gear ratio 1:18), in human body (weight) decline process, slow-speed of revolution high-torque is converted to the little moment of high rotating speed, direct current generator generation Ampere force is driven to carry out the power of balanced human's decline, the supply of direct current generator generating simultaneously lithium cell charging, break away from the dependence to external power source, be more suitable for the use of the urgent occasions such as various accidental pollution event.Application direct current generator tests the speed and single-chip microcomputer has designed and produced control circuit and automatically adjusts to electromagnetic damping, has that brake-force control is level and smooth, mechanical wearing and tearing and a reliable advantage of physical principle, also significantly simplify the Operating Complexity of escape apparatus.By electromagnetic brake device, to start and close to startup brake remote-controlled during ground slow the falling of escape apparatus, reduce escape personnel and to escape the fear of process, be more suitable for the urgent use of the different crowd such as old man, child, be convenient to promote.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the sectional structure schematic diagram of Fig. 1.
Detailed description of the invention
See Fig. 1 and 2, the utility model embodiment is provided with base plate 14, wire leading wheel 12, wire leading wheel fixture 17, main shaft support frame 19, main shaft 18, main shaft fixture 16, main shaft bearing 15, take-up pulley 1, transmission input gear 2, speed changer 3, speed changer support member 23, transmission output gear 4, unilateral bearing 13, horizontal bearing 20, speed changer sensing shaft 21, damper input gear 5, damper 7, damper gripper shoe 22, electromagnetic brake 6, speed measuring motor input gear 8, speed measuring motor 9, control circuit board 10 and battery 11.
Wire leading wheel 12 is located on wire leading wheel fixture 17, and the surperficial side of base plate 14 is located at by wire leading wheel fixture 17; Main shaft support frame 19 is fixed on base plate 14, main shaft 18 is fixed on main shaft support frame 19 by main shaft fixture 16, take-up pulley 1 is on the spindle 18 sheathed, and by being rotatably assorted with main shaft bearing 15 and main shaft 18, take-up pulley 1 is made up of take-up gear and take-up sleeve, take-up gear is fixedly connected with take-up sleeve one end, and take-up gear engages with transmission input gear 2; Speed changer 3 is fixed on base plate 14 by speed changer support member 23, transmission input gear 2 is connected with speed changer 3 input being furnished with unilateral bearing 13, speed changer 3 output is furnished with horizontal bearing 20, transmission output gear 4 is located at speed changer 3 output, and speed changer 3 output is as speed changer sensing shaft 21; Transmission output gear 4 engages with damper input gear 5, and damper 7 is electromagnetic damper, and damper 7 is fixed on base plate 14 by damper gripper shoe 22, and electromagnetic brake 6 is located at damper 7 input; Speed measuring motor input gear 8 engages with transmission input gear 2, and speed changer 3 side is located at by speed measuring motor 9; Control circuit board 10 and battery 11 are all located on base plate 14, and control circuit board 10 comprises processor, and the signal input part of processor connects the tachometer signal of speed measuring motor 9, and the signal output part of processor connects electromagnetic brake 6 and electromagnetic damper 7.
The gear ratio of described speed changer 3 is 1: 18.Described wire leading wheel 12 is a pair pair roller.Described processor is single-chip microcomputer.Described battery 11 is lithium battery.
The motor of described electromagnetic damper 7 adopts super-silent dc generator, and rotating speed can be 1200 ~ 4000r/min, and the voltage of generation is 6 ~ 20V.
Escaping rope adopts high-strength polyethylene fiber, and can bear maximum pull is 600Kg power, its strength ratio carbon fiber high twice, is the fiber that intensity is the highest in the world at present; Line density: 0.96 is lighter than water; Anti-cutting, strong mechanical property; Smooth surface, coefficient of friction is low, not easily fluffs; Elongation at break: 3.5%, flexural fatigue comparatively Kevlar is good; Corrosion resistance is extremely strong.Have lightweight, the features such as spy is soft, easy to operate.
Described speed changer 3 adopts model to be the reinforced decelerator of 60GX, runs torque range: 2.0 ~ 30.0N.m;
The technical parameter of described each gear can be selected as follows:
The take-up gear of take-up pulley 1: modulus: 2, the number of teeth: 120, pressure angle: 20, the facewidth: 10mm, diameter: 244mm;
Transmission input gear 2: modulus: 2, the number of teeth: 25, pressure angle: 20, the facewidth: 10mm, diameter: 54mm;
Transmission output gear 4: modulus: 2, the number of teeth: 25, pressure angle: 20, the facewidth: 10mm, diameter: 54mm;
Damper input gear 5: modulus: 2, the number of teeth: 40, pressure angle: 20, the facewidth: 10mm, diameter: 84mm;
Speed measuring motor input gear 8: modulus: 2, the number of teeth: 25, pressure angle: 20, the facewidth: 10mm, diameter: 54mm.
The operation principle of the present embodiment is as follows:
Slow decline course work principle: people pulls rope to carry out unwrapping wire by take-up pulley 1, in unwrapping wire process, moment is flowed to speed measuring motor travelling gear 8 (to speed measuring motor) and unilateral bearing 13 by transmission input gear 2 by take-up pulley 1 simultaneously, unilateral bearing 13 changes slow-speed of revolution high-torque into high rotating speed Low-torque by speed changer 3 again, and (rotating speed improves 18 times, moment reduces to original 1/18th), speed changer Low-torque high speed capability passes to damper input gear 5 by transmission output gear 4 again, final input electromagnetic damper 7, electromagnetic damper 7 is utilized to produce corresponding resistance and electric power, the electric power produced is used for charging to lithium battery 11.
Slow decline workflow: take-up pulley 1 → transmission input gear 2 → unilateral bearing 13 → speed changer 3 (1: 18) → transmission output gear 4 → damper input gear 5 → damper 7.
Brake principle: damper 7 is furnished with electromagnetic brake 6, powered for electromagnetic brake 6 by control circuit board 10, make electromagnetic brake 6 that damper input gear 5 is braked (brake) completely, at this moment by respective gears and speed changer 3, make take-up pulley 1 also completely locked, do not allow to rotate.
Brake workflow: take-up pulley 1 → transmission input gear 2 → unilateral bearing 13 → speed changer 3 (1: 18) → transmission output gear 4 → damper input gear 5 → electromagnetic brake 6.
Take-up workflow: powered for damper 7 by control circuit board 10, damper 7 is produced and reversely rotates moment, and by damper input gear 5 → transmission output gear 4 → speed changer 3 (1: 18, rotation torque promotes 18 times) → unilateral bearing 13 → transmission input gear 4 → take-up pulley 1, finally reversely rotated by take-up pulley 1 and drive rope to reclaim.
When the utility model uses, equipped escaping rope preferably adopts high-strength polyethylene fiber, and can bear maximum pull is 600Kg power, its strength ratio carbon fiber high twice, is the fiber that intensity is the highest in the world at present; Line density: 0.96 is lighter than water; Anti-cutting, strong mechanical property; Smooth surface, coefficient of friction is low, not easily fluffs; Elongation at break: 3.5%, flexural fatigue comparatively Kevlar is good; Corrosion resistance is extremely strong.Have lightweight, the features such as spy is soft, easy to operate.

Claims (8)

1. an electromagnetic damping self-powered high-rise escape apparatus, it is characterized in that, be provided with base plate, wire leading wheel, wire leading wheel fixture, main shaft support frame, main shaft, main shaft fixture, main shaft bearing, take-up pulley, transmission input gear, speed changer, speed changer support member, transmission output gear, unilateral bearing, horizontal bearing, speed changer sensing shaft, damper input gear, damper, damper gripper shoe, electromagnetic brake, speed measuring motor input gear, speed measuring motor, control circuit board and battery;
Wire leading wheel is located on wire leading wheel fixture, and backplate surface side is located at by wire leading wheel fixture; Main shaft support frame is fixed on base plate, main shaft is fixed on main shaft support frame by main shaft fixture, take-up pulley is set on main shaft, and by coordinating with main axis with main shaft bearing, take-up pulley is made up of take-up gear and take-up sleeve, take-up gear is fixedly connected with take-up sleeve one end, and take-up gear engages with transmission input gear; Speed changer is fixed on base plate by speed changer support member, transmission input gear is connected with the transmission input being furnished with unilateral bearing, transmission output is furnished with horizontal bearing, and transmission output gear is located at transmission output, and transmission output is as speed changer sensing shaft; Transmission output gear engages with damper input gear, and damper is electromagnetic damper, and damper is fixed on base plate by damper gripper shoe, and electromagnetic brake is located at damper input; Speed measuring motor input gear engages with transmission input gear, and speed changer side is located at by speed measuring motor; Control circuit board and battery are all located on base plate, and control circuit board comprises processor, and the signal input part of processor connects the tachometer signal of speed measuring motor, and the signal output part of processor connects electromagnetic damper and electromagnetic brake.
2. a kind of electromagnetic damping self-powered high-rise escape apparatus as claimed in claim 1, it is characterized in that, the gear ratio of described speed changer is 1: 18.
3. a kind of electromagnetic damping self-powered high-rise escape apparatus as claimed in claim 1, it is characterized in that, described wire leading wheel is a pair pair roller.
4. a kind of electromagnetic damping self-powered high-rise escape apparatus as claimed in claim 1, it is characterized in that, described processor is single-chip microcomputer.
5. a kind of electromagnetic damping self-powered high-rise escape apparatus as claimed in claim 1, it is characterized in that, described battery is lithium battery.
6. a kind of electromagnetic damping self-powered high-rise escape apparatus as claimed in claim 1, is characterized in that, the motor of described electromagnetic damper adopts dc generator, and rotating speed is 1200 ~ 4000r/min, and the voltage of generation is 6 ~ 20V.
7. a kind of electromagnetic damping self-powered high-rise escape apparatus as claimed in claim 1, is characterized in that, described speed changer adopts model to be the reinforced decelerator of 60GX, runs torque range: 2.0 ~ 30.0N.m.
8. a kind of electromagnetic damping self-powered high-rise escape apparatus as claimed in claim 1, is characterized in that, the technical parameter of described each gear is selected as follows:
The take-up gear of take-up pulley: modulus: 2, the number of teeth: 120, pressure angle: 20, the facewidth: 10mm, diameter: 244mm;
Transmission input gear: modulus: 2, the number of teeth: 25, pressure angle: 20, the facewidth: 10mm, diameter: 54mm;
Transmission output gear: modulus: 2, the number of teeth: 25, pressure angle: 20, the facewidth: 10mm, diameter: 54mm;
Damper input gear: modulus: 2, the number of teeth: 40, pressure angle: 20, the facewidth: 10mm, diameter: 84mm;
Speed measuring motor input gear: modulus: 2, the number of teeth: 25, pressure angle: 20, the facewidth: 10mm, diameter: 54mm.
CN201520601402.7U 2015-08-11 2015-08-11 Electromagnetic damping self -power high -rise escape device Withdrawn - After Issue CN204890996U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520601402.7U CN204890996U (en) 2015-08-11 2015-08-11 Electromagnetic damping self -power high -rise escape device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520601402.7U CN204890996U (en) 2015-08-11 2015-08-11 Electromagnetic damping self -power high -rise escape device

Publications (1)

Publication Number Publication Date
CN204890996U true CN204890996U (en) 2015-12-23

Family

ID=54913213

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520601402.7U Withdrawn - After Issue CN204890996U (en) 2015-08-11 2015-08-11 Electromagnetic damping self -power high -rise escape device

Country Status (1)

Country Link
CN (1) CN204890996U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105031840A (en) * 2015-08-11 2015-11-11 蔡志典 Electromagnetic damping self-powered high-rise escape device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105031840A (en) * 2015-08-11 2015-11-11 蔡志典 Electromagnetic damping self-powered high-rise escape device
CN105031840B (en) * 2015-08-11 2018-07-31 蔡志典 Electromagnetic damping self-powered high-rise escape apparatus

Similar Documents

Publication Publication Date Title
CN201701658U (en) Tall building escape self rescue device
CN105031840A (en) Electromagnetic damping self-powered high-rise escape device
WO2003049807A1 (en) Ajustable-speed life-saving apparatus
CN201799022U (en) Mechanical high-building escape device
CN201500387U (en) Reciprocating high building escape descending control device
CN204890996U (en) Electromagnetic damping self -power high -rise escape device
CN113877086B (en) Automatic boosting speed-regulating escape descent control device
CN202682587U (en) Hydraulic damping type descending rescue device
CN201216823Y (en) Security self-saving cable device for building
CN202044663U (en) Escape device
CN102294084B (en) Mechanical descent control device
CN2726641Y (en) Life-saving slowly-falling equipment
CN202078665U (en) Portable knapsack type high-rise escape device
CN201123960Y (en) High building life-saving device
CN103830852A (en) Descent control device for both police and people
CN209751982U (en) multi-person slow-descending escape device
CN204910534U (en) Flee and slowly fall ware and system of fleing with high altitude
CN202982963U (en) Trebling damping ordered superposition high-rise escape device
CN101869743B (en) Multifunctional escaping descent control device
CN202961549U (en) Escape device for high-rise fire
CN207356381U (en) emergency escape self-rescuer
CN201492828U (en) Planetary gear descent control device
CN204767081U (en) Device for fleeing from high building
CN201791275U (en) Emergency stop braking device of multifunctional escape descent control device
CN2345232Y (en) Fireproof cableway

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned
AV01 Patent right actively abandoned

Granted publication date: 20151223

Effective date of abandoning: 20180731