CN113800357A - Overspeed protection device for descending of high-speed ladder and method thereof - Google Patents
Overspeed protection device for descending of high-speed ladder and method thereof Download PDFInfo
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- CN113800357A CN113800357A CN202111165363.7A CN202111165363A CN113800357A CN 113800357 A CN113800357 A CN 113800357A CN 202111165363 A CN202111165363 A CN 202111165363A CN 113800357 A CN113800357 A CN 113800357A
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- 238000000034 method Methods 0.000 title claims description 8
- 230000009467 reduction Effects 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 abstract description 18
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 2
- 208000012661 Dyskinesia Diseases 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
- B66B5/06—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed electrical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
- B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses an overspeed protection device for descending of a high-speed elevator, which comprises a traction sheave driven by a motor, wherein the traction sheave is connected with a car through a steel cable, the traction sheave detects the rotating speed through an elevator speed detector so as to measure the descending speed of the car, the overspeed protection device also comprises a protection mechanism, the protection mechanism is positioned on the side surface of the car, the protection mechanism comprises a friction column and a pair of clamping deceleration parts, the friction column is parallel to a guide rail of the elevator and positioned on the side edge of the car, the clamping deceleration parts are arranged on the car, the pair of clamping deceleration parts are symmetrically distributed on the two sides of the friction column, and the movable end of the clamping deceleration part clamps the surface of the clamping friction column so as to realize overspeed protection; can play the effect of braking speed reduction when the elevator is overspeed down, protect the elevator, and owing to adopt the centre gripping portion of slowing down that is located on the car to slow down, can reduce the pressure to the cable wire when playing the guard action, and invade the space of crossbeam about the car and account for less, can keep the upper and lower crossbeam originally.
Description
Technical Field
The invention belongs to the technical field of elevators, and particularly relates to an overspeed protection device and method for descending of a high-speed elevator.
Background
Application number CN201921069314.1 discloses an elevator overspeed protection device for elevator protection, comprising: the elevator shaft, drive mechanism, reduction gears and elevator car, the top fixed mounting of elevator shaft has drive mechanism, the last reduction gears of installing of drive mechanism, drive mechanism includes traction wheel and master gear, one side fixed mounting of traction wheel has the master gear, one side that the master gear was kept away from to the traction wheel is passed through the reduction gear and is connected with traction motor's output transmission, traction motor fixed mounting is at the top of elevator shaft, be provided with the rope on the traction wheel, the one end and the balancing weight of rope are fixed, the one end that the balancing weight was kept away from to the rope is fixed with the top fixed connection of traction frame.
Application number CN201721136864.1 discloses an elevator overspeed protection device, which comprises a steel wire rope speed detector, an elevator car, a guide shoe support frame arranged at the bottom of the elevator car and connected with the bottom of the elevator car, and a guide rail arranged on a hoistway wall; the guide rail comprises a guide rail body, a guide rail groove and a speed limiting groove which are arranged on the guide rail body, wherein a speed limiting block with gradually thickened thickness downwards or upwards is arranged in the speed limiting groove along the running direction of the elevator; the guide shoe support frame comprises a guide shoe head which is in sliding connection with the guide rail groove, the guide shoe support frame faces to the opening notch of the speed-limiting groove side, and a signal receiver, a driver, a telescopic rod and a speed-limiting friction block are arranged inside the notch.
Most of the elevator overspeed protection devices on the market today are divided into two types, one is to set up a protection mechanism on the top of the hoistway, such as the elevator overspeed protection device disclosed in application No. CN201921069314.1, and the pressure of the wire rope is increased during the down overspeed braking using such a mechanism, and the pressure increases as the mass in the car increases; another is to add plate-like protection mechanisms at the upper or lower positions of the car, such as the elevator overspeed protection device disclosed in application No. CN201721136864.1, which will intrude into the space of the car beam and affect the stability.
Disclosure of Invention
The present invention is directed to an overspeed protection apparatus for descending high-speed stairs and a method thereof to solve the above-mentioned problems of the background art.
In order to achieve the purpose, the invention adopts the following technical scheme: a overspeed protection device for descending of high-speed ladder, including motor drive's driving sheave, the driving sheave passes through the cable wire and is connected with the car, the driving sheave passes through elevator velometer and detects the rotational speed and then measure the descending speed of car, still include protection mechanism, protection mechanism is located the side of car, protection mechanism includes the friction post, and a pair of centre gripping speed reduction portion, the friction post is parallel with the guide rail of elevator and is located the side of car, centre gripping speed reduction portion installs on the car, a pair of centre gripping speed reduction portion symmetric distribution is in the both sides of friction post, the movable end of centre gripping speed reduction portion carries out the centre gripping to the surface of centre gripping friction post and then realizes overspeed protection.
Furthermore, the clamping speed reduction part comprises a first telescopic piece, a first friction plate, a second telescopic piece and a second friction plate, the first friction plate is installed at the movable end of the first telescopic piece, the second friction plate is installed at the movable end of the second telescopic piece, and the friction column is clamped by the opposite side walls of the first friction plate and the second friction plate.
Furthermore, the side walls of the first friction plate and the second friction plate are arc-shaped and are matched with the radian of the outer wall of the friction column.
Furthermore, the first extensible member and the second extensible member are installed on the bearing plate, the friction column penetrates through the interior of the bearing plate, and the bearing plate is fixedly connected with the connecting portion through bolts.
Further, the connecting part is fixedly connected with the upper cross beam.
Further, an upper cross beam and a lower cross beam are respectively installed at the top and the bottom of the car.
Further, the upper and lower beams move up and down along the guide rails.
Further, when the elevator velometer detects that the descending speed of the car exceeds a set threshold value, an instruction is sent out to enable the first telescopic piece and the second telescopic piece to extend out and clamp; when the descending speed of the lift car is smaller than a set threshold value, the first telescopic piece and the second telescopic piece reset.
Furthermore, grooves are formed in the side walls of the friction parts of the first friction plate and the second friction plate, and the cross sections of the grooves are wavy.
Further, the overspeed protection method for descending of the high-speed ladder comprises the following steps:
A. the elevator velometer detects the rotating speed of the traction sheave and further calculates the descending speed of the elevator car;
B. when the descending speed of the lift car exceeds a set threshold value, sending a command to enable a first telescopic piece and a second telescopic piece which are installed on the lift car to extend out so as to clamp a friction column;
C. the car is clamped by the first friction plate and the second friction plate and the friction column, so that the car is decelerated by increasing friction force;
D. and when the descending speed of the elevator car is less than a set threshold value, sending a command to reset the first telescopic piece and the second telescopic piece.
Compared with the prior art, the invention has the beneficial effects that:
1. this design adopts the friction column that is on a parallel with the guide rail, and the cooperation is located the centre gripping speed reduction portion on the car, can play the effect that the braking was slowed down when the elevator was overspeed down, protects the elevator, and because the centre gripping speed reduction portion that adopts to be located on the car slows down, can reduce the pressure to the cable wire when playing the guard action, and invade to take up less to the crossbeam space about the car, can remain the last crossbeam originally.
2. The grooves formed in the side walls of the friction parts can increase the contact area with air, increase the heat dissipation efficiency, reduce the surface smoothness and increase the contact friction force during clamping, and the inclined grooves can reduce the instantaneous abnormal movement of clamping compared with the transverse or longitudinal grooves when the friction parts are in downward braking due to the preset shape, so that the friction force can be effectively increased, in other words, the friction force is increased, and the friction force is not too large, and the deceleration stability is ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the protection mechanism of the present invention;
FIG. 3 is an enlarged schematic view of the portion A of the present invention;
FIG. 4 is a schematic structural view of a friction plate according to the present invention;
in the figure: 1. a motor; 2. a traction sheave; 3. a car; 4. a guide rail; 5. a lower cross beam; 6. an upper cross beam; 7. a friction column; 8. a protection mechanism; 9. a connecting portion; 10. a first telescoping member; 11. a first friction plate; 12. a carrier plate; 13. a friction portion; 14. a groove; 15. a second telescoping member; 16. a second friction plate; 17. an elevator velometer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
With reference to fig. 1-4, the present invention proposes a solution for: an overspeed protection device used for descending of a high-speed elevator comprises a traction sheave 2 driven by a motor 1, wherein the traction sheave 2 is connected with a car 3 through a steel cable, the traction sheave 2 detects the rotating speed through an elevator velometer 17 so as to measure the descending speed of the car 3, the top and the bottom of the car 3 are respectively provided with an upper cross beam 6 and a lower cross beam 5, the upper cross beam 6 and the lower cross beam 5 move up and down along a guide rail 4, and when the elevator velometer 17 detects that the descending speed of the car 3 exceeds a set threshold value, an instruction is sent to enable a first telescopic piece 10 and a second telescopic piece 15 to extend out and clamp; when the descending speed of the car 3 is less than the set threshold value, the first extensible member 10, the second extensible member 15 resets, the elevator protection device further comprises a protection mechanism 8, the protection mechanism 8 is located on the side face of the car 3, the protection mechanism 8 comprises a friction column 7 and a pair of clamping deceleration portions, the friction column 7 is parallel to the guide rail 4 of the elevator and is located on the side face of the car 3, the clamping deceleration portions are installed on the car 3, the pair of clamping deceleration portions are symmetrically distributed on two sides of the friction column 7, and the movable end of the clamping deceleration portion clamps the surface of the clamping friction column 7 to further achieve overspeed protection.
In this embodiment, the clamping decelerating portion includes a first telescopic member 10, a first friction plate 11, a second telescopic member 15 and a second friction plate 16, the first telescopic member 10 and the second telescopic member 15 are installed on the bearing plate 12, the friction column 7 penetrates through the inside of the bearing plate 12, the bearing plate 12 is fixedly connected with the connecting portion 9 through a bolt, the connecting portion 9 is fixedly connected with the upper beam 6, the first friction plate 11 is installed at a movable end of the first telescopic member 10, the second friction plate 16 is installed at a movable end of the second telescopic member 15, opposite side walls of the first friction plate 11 and the second friction plate 16 clamp the friction column 7, and side walls of the first friction plate 11 and the second friction plate 16 are arc-shaped and are matched with an outer wall radian of the friction column 7.
In this embodiment, the friction portions 13 of the first friction plate 11 and the second friction plate 16 have grooves 14 on the side walls thereof, and the grooves 14 have a wavy cross section.
In this embodiment, the overspeed protection method for descending of a high-speed ladder includes the following steps:
A. the elevator velometer 17 detects the rotating speed of the traction sheave 2 and further calculates the descending speed of the car 3;
B. when the descending speed of the car 3 exceeds a set threshold value, a command is given to extend a first telescopic piece 10 and a second telescopic piece 15 which are arranged on the car 3 so as to clamp the friction column 7;
C. the car 3 is clamped by the first friction plate 11 and the second friction plate 16 and the friction column 7, and the car 3 is decelerated by increasing friction force;
D. when the descending speed of the car 3 is less than the set threshold value, a command is given to reset the first expansion piece 10 and the second expansion piece 15.
The working principle and the using process of the invention are as follows: the elevator velometer 17 detects the rotating speed of the traction sheave 2 to calculate the descending speed of the car 3, when the descending speed of the car 3 exceeds a set threshold value, an instruction is sent to enable the first telescopic part 10 and the second telescopic part 15 which are installed on the car 3 to extend out to clamp the friction column 7, the friction column 7 which is parallel to the guide rail 4 is adopted to be matched with the clamping deceleration part which is arranged on the car 3, the effect of braking deceleration can be achieved when the elevator descends and exceeds the speed limit, the elevator is protected, the pressure on a steel cable can be reduced while the effect of protection is achieved due to the fact that the clamping deceleration part which is arranged on the car 3 is adopted to decelerate, the space occupation of the upper cross beam and the lower cross beam of the car 3 is small, the original upper cross beam and the lower cross beam can be reserved, the car 3 is clamped with the friction column 7 due to the first friction plate 11 and the second friction plate 16, and the groove 14 which is formed in the side wall of the friction part 13 can increase the contact area with air on one hand, the heat dissipation efficiency is improved, the surface smoothness is reduced, the contact friction force during clamping is increased, on the other hand, the preset shape can be used for effectively increasing the friction force and reducing the instantaneous abnormal movement of clamping when the inclined groove 14 is compared with a transverse or longitudinal groove during downward braking, the car 3 is decelerated by increasing the friction force, and when the downward speed of the car 3 is smaller than a set threshold value, an instruction is sent to enable the first telescopic piece 10 and the second telescopic piece 15 to reset.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (10)
1. A overspeed protection device for descending of high-speed elevator, including traction sheave (2) of motor (1) drive, traction sheave (2) are connected with car (3) through the cable wire, and traction sheave (2) detect the rotational speed and then measure the descending speed of car (3) through elevator velometer (17), its characterized in that: still include protection machanism (8), protection machanism (8) are located the side of car (3), protection machanism (8) are including friction post (7) and a pair of centre gripping speed reduction portion, friction post (7) are parallel with guide rail (4) of elevator and are located the side of car (3), centre gripping speed reduction portion installs on car (3), and a pair of centre gripping speed reduction portion symmetric distribution is in the both sides of friction post (7), the movable end of centre gripping speed reduction portion carries out the centre gripping to the surface of centre gripping friction post (7) and then realizes overspeed protection.
2. The overspeed protection apparatus for high speed ladder downlinks of claim 1, wherein: the clamping speed reduction part comprises a first telescopic piece (10), a first friction plate (11), a second telescopic piece (15) and a second friction plate (16), wherein the first friction plate (11) is installed at the movable end of the first telescopic piece (10), the second friction plate (16) is installed at the movable end of the second telescopic piece (15), and the first friction plate (11) and the second friction plate (16) are clamped on the friction column (7) through opposite side walls.
3. The overspeed protection apparatus for high speed ladder downlinks of claim 2, wherein: the side walls of the first friction plate (11) and the second friction plate (16) are arc-shaped and are matched with the radian of the outer wall of the friction column (7).
4. The overspeed protection apparatus for high speed ladder downlinks of claim 2, wherein: the friction column is characterized in that the first telescopic piece (10) and the second telescopic piece (15) are installed on the bearing plate (12), the friction column (7) penetrates through the inside of the bearing plate (12), and the bearing plate (12) is fixedly connected with the connecting portion (9) through bolts.
5. The overspeed protection device of claim 4, wherein: the connecting part (9) is fixedly connected with the upper cross beam (6).
6. The overspeed protection apparatus for high speed ladder downlinks of claim 1, wherein: and the top and the bottom of the car (3) are respectively provided with an upper cross beam (6) and a lower cross beam (5).
7. The overspeed protection device of claim 6, wherein: the upper cross beam (6) and the lower cross beam (5) move up and down along the guide rail (4).
8. The overspeed protection apparatus for high speed ladder downlinks of claim 1, wherein: when the elevator velometer (17) detects that the descending speed of the car (3) exceeds a set threshold value, a command is sent out to enable the first telescopic piece (10) and the second telescopic piece (15) to extend out and clamp; when the descending speed of the car (3) is less than a set threshold value, the first expansion piece (10) and the second expansion piece (15) reset.
9. The overspeed protection apparatus for high speed ladder downlinks of claim 2, wherein: the friction parts (13) of the first friction plate (11) and the second friction plate (16) are provided with grooves (14) on the side walls, and the sections of the grooves (14) are wavy.
10. An overspeed protection method for descending of a high-speed ladder is characterized by comprising the following steps:
A. the elevator velometer (17) detects the rotating speed of the traction sheave (2) to further calculate the descending speed of the cage (3);
B. when the descending speed of the car (3) exceeds a set threshold value, a command is sent out to enable a first telescopic piece (10) and a second telescopic piece (15) which are installed on the car (3) to extend out so as to clamp the friction column (7);
C. the car (3) is clamped by the first friction plate (11) and the second friction plate (16) and the friction column (7), and the car (3) is decelerated by increasing friction force;
D. when the descending speed of the car (3) is smaller than a set threshold value, a command is sent out to reset the first telescopic piece (10) and the second telescopic piece (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111165363.7A CN113800357A (en) | 2021-09-30 | 2021-09-30 | Overspeed protection device for descending of high-speed ladder and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111165363.7A CN113800357A (en) | 2021-09-30 | 2021-09-30 | Overspeed protection device for descending of high-speed ladder and method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN113800357A true CN113800357A (en) | 2021-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111165363.7A Pending CN113800357A (en) | 2021-09-30 | 2021-09-30 | Overspeed protection device for descending of high-speed ladder and method thereof |
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| Country | Link |
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| CN (1) | CN113800357A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116587304A (en) * | 2023-07-17 | 2023-08-15 | 福建省特种设备检验研究院泉州分院 | Elevator maintenance robot |
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| KR20160085532A (en) * | 2015-01-08 | 2016-07-18 | 현대엘리베이터주식회사 | Elevator emergency stop device |
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| CN208327021U (en) * | 2018-06-27 | 2019-01-04 | 浙江巨通电梯有限公司 | A kind of elevator overspeed protecting device |
| CN210505139U (en) * | 2019-07-10 | 2020-05-12 | 湖北优力维特电梯有限公司 | Elevator overspeed protection device |
| CN216377044U (en) * | 2021-09-30 | 2022-04-26 | 镇江朝阳机电科技有限公司 | Overspeed protection device for descending high-speed ladder |
-
2021
- 2021-09-30 CN CN202111165363.7A patent/CN113800357A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013157069A1 (en) * | 2012-04-16 | 2013-10-24 | 三菱電機株式会社 | Elevator device |
| CN103381984A (en) * | 2013-07-31 | 2013-11-06 | 杨石红 | Elevator braking system |
| KR20160085532A (en) * | 2015-01-08 | 2016-07-18 | 현대엘리베이터주식회사 | Elevator emergency stop device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116587304A (en) * | 2023-07-17 | 2023-08-15 | 福建省特种设备检验研究院泉州分院 | Elevator maintenance robot |
| CN116587304B (en) * | 2023-07-17 | 2023-10-20 | 福建省特种设备检验研究院泉州分院 | Elevator maintenance robot |
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