CN109928284A - Detection device for accidental movement of elevator cage and hypervelocity - Google Patents
Detection device for accidental movement of elevator cage and hypervelocity Download PDFInfo
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- CN109928284A CN109928284A CN201711375371.8A CN201711375371A CN109928284A CN 109928284 A CN109928284 A CN 109928284A CN 201711375371 A CN201711375371 A CN 201711375371A CN 109928284 A CN109928284 A CN 109928284A
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- roller
- wirerope
- hypervelocity
- detection device
- accidental movement
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
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- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
The present invention relates to the detection device for accidental movement of elevator cage and hypervelocity, including roller, the roller is in contact with wirerope or guide rail or traction sheave；If a testing agency, the testing agency is used to detect the roller, to detect lift car abnormality.Under detecting state, roller is contacted with wirerope, while revolving speed or the displacement of roller are measured by testing agency, measures the operating condition of wirerope indirectly, whether within a preset range to judge wirerope, if operating normally in normal preset range；If exceeding normal preset range, then start external brake to be braked, to guarantee the stable operation of elevator, reduce the damage of property, the apparatus structure is simple, and manufacturing cost is low and then reduces the use cost of user, strong operability, and can effectively ensure that the safe operation of elevator, be conducive to the device and promote and apply in the market.
Description
Technical field
The present invention relates to elevator detection technique fields, are particularly used for the detection dress of accidental movement of elevator cage and hypervelocity
It sets.
Background technique
Steel wire braking (rope brake) is the safety guard of ascending for elevator hypervelocity and carriage accidental movement, is solved at present
Certainly uplink hypervelocity is to test the speed to trigger steel wire braking movement by limiter of speed, to reach up-running over-speed protection.In order to prevent
Carriage accidental movement, settling mode is mainly to set photoelectricity (or magnetic) detection switch by adding in carriage at present, in each layer
Installation detects enabling and moving distance every magnetic (light) plate, or on through limiter of speed adds displacement detecting with trigger device to touch
Send out steel wire braking.
The above method needs to carry out malfunction monitoring to each detection unit, control unit and trigger unit, realizes fault-free
Detection feedback is more difficult, and causes increase signal transmission link is more, is not easy to installation to implement, and risk is big, at high cost.Together
When, installation quality factor and such environmental effects are big.
On the other hand, the steel wire braking under power loss triggering mode is in outer grid cut-off, if without backup power supply, steel
Cord brake meeting automatic trigger because of power loss.According to hand-reset, elevator cannot be normal after the power-off of elevator close quarters
Work, hand-reset are unable to satisfy requirement.According to automatically reseting, need to increase motor, the additional resets machine such as pneumatically or hydraulically
Structure, control complexity, higher cost.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the present invention provides be used for accidental movement of elevator cage and surpass
The detection device of speed detects to obtain lift car by roller and wirerope or the detection method of the contacts such as guide rail or traction sheave
The abnormality of operation triggers brake when being abnormal operation come the carriage for stop operation of slowing down, and the apparatus structure is simple,
Use cost is low, operability, and security performance is high, is conducive to popularization of the device in elevator applications.
In order to achieve the above-mentioned object of the invention, the invention adopts the following technical scheme: for accidental movement of elevator cage and surpassing
The detection device of speed, including roller, the roller are in contact with wirerope or guide rail or traction sheave；If a testing agency, described
Testing agency be used to detect the roller, to detect lift car abnormality.
As a preferred solution of the present invention, the testing agency includes magnet and magnetic coder；The magnet installation
In it is described lean on wheel side, the magnetic coder it is opposite with the magnet install and there are gaps.
As a preferred solution of the present invention, the magnet is rounded, and magnet, roller and magnetic coder three coaxially set
It sets.
As a preferred solution of the present invention, the roller center is equipped with by wheel shaft；Roller axle position is in the roller
The part of two sides is connected with supporting plate, and the supporting plate rotatable shaft is connected on bracket.
In order to achieve the above-mentioned object of the invention, the present invention uses another technical solution: for accidental movement of elevator cage and
The detection device of hypervelocity comprising roller, driving mechanism and testing agency；Under normal condition, the roller and wirerope or lead
Rail or traction sheave separation；When carriage is abnormal mobile or overspeed condition, the roller under the action of the drive mechanism with wirerope
Or guide rail or traction sheave touch, and the operation exception state of the elevator is detected by wirerope or guide rail or traction sheave and is triggered
Brake.
As a preferred solution of the present invention, the abnormality is that elevator is parked in leveling gate opening state or electricity
Terraced overspeed condition or outer net off-position, the roller are in contact with the relative motions part such as wirerope or guide rail or traction sheave.
As a preferred solution of the present invention, the roller center is equipped with by wheel shaft；Roller axle position is in the roller
The part of two sides is connected with supporting plate, while the branch board shaft connects bracket.
It as a preferred solution of the present invention, further include resetting-mechanism；The resetting-mechanism installation is between the fixing plates.
As a preferred solution of the present invention, the roller is installed on sliding rack, and the sliding rack is installed on sliding axle；
The driving mechanism includes decelerating motor and electromagnet；The output end of the speed reducer is connected with screw rod, and the screw rod is equipped with
Fixed plate, while the fixed plate is installed on the sliding axle；On sliding axle between the sliding rack and the electromagnet also
It is equipped with spring；Under abnormality, electromagnet described in electromagnet power loss is separated with the end face of sliding axle, and the sliding axle is described
It is mobile to the direction of the relative motions part such as the wirerope or guide rail or traction sheave under the drive of spring-return power, the roller with
The contact of the relative motions part such as the wirerope or guide rail or traction sheave.
Compared with prior art, the beneficial effects of the present invention are: the present invention is for accidental movement of elevator cage and hypervelocity
Detection device, under detecting state, roller is contacted with wirerope or guide rail or traction sheave etc., measures roller by testing agency
Revolving speed or displacement, and then determine the operating condition of lift car, to judge the relative motion of wirerope or guide rail or traction sheave
Displacement or speed whether within a preset range, if being operated normally in normal preset range；If beyond normally default model
It encloses, then starts external brake and retarding braking is carried out to elevator, the safety under abnormality to guarantee elevator reduces property
Damage, the apparatus structure is simple, and manufacturing cost is low and then reduces the use cost of user, strong operability, and can be effective
The safe operation for guaranteeing elevator, is conducive to the device and promotes and apply in the market.
Detailed description of the invention
Fig. 1 is the structural schematic diagram in embodiment for accidental movement of elevator cage and the detection device of hypervelocity；
Fig. 2 is the structural schematic diagram in embodiment for accidental movement of elevator cage and the detection device of hypervelocity；
Fig. 3 is the structure top view in embodiment for accidental movement of elevator cage and the detection device of hypervelocity；
Fig. 4 is the use state diagram in embodiment for accidental movement of elevator cage and the detection device of hypervelocity；
Fig. 5 is the structural schematic diagram in embodiment for accidental movement of elevator cage and the detection device of hypervelocity.
Appended drawing reference: 1, bracket；2, the first pulling plate；3, pulling plate axis；4, the second pulling plate；5, reset spring；6, branch board shaft；
61, spring base；7, supporting plate；8, wheel shaft is leaned on；9, roller；91, mechanical contact；10, adjustment bolt；11, magnet；12, detection plate；
13, connecting terminal；14, magnetic coder；15, wirerope；δ, magnet are at a distance from magnetic coder；311, decelerating motor；312, even
Female connector；313, electromagnet；314, electromagnetism brandreth；315, spring；316, guiding axis；317, sliding rack；320, sliding bearing；
321, sliding axle；322, fixing axle；323, fixed plate；324, screw pushing block；325, screw rod；326, limited block A；327, limited block
B。
Specific embodiment
It elaborates with reference to the accompanying drawing to the embodiment of the present invention.
Embodiment 1: as shown in Figures 1 to 4, a kind of detection device for accidental movement of elevator cage and hypervelocity, including
The roller 9 being in contact with wirerope 15 or guide rail or traction sheave etc. is equipped with the detection machine for detecting roller 9 at roller 9
Structure, testing agency to obtain wirerope 15 or guide rail or traction indirectly by the displacement of detection roller 9 or speed or other parameters
The operation conditions of wheel etc., with judge the operation conditions of carriage whether in default range, if in normal preset range,
It operates normally；If exceeding normal preset range, starts external brake and braked come the carriage for stop operation of slowing down.
Testing agency is mounted on the side of roller 9, the installation position of magnet 11 using magnet 11 and magnetic coder 14, magnet 11
Set it is opposite with the installation site of magnetic coder 14, and there are gap between magnet 11 and magnetic coder 14, as shown in figure 3, δ is magnetic
Body 11 is at a distance from magnetic coder 14, i.e., in use, for magnet 11 under rotary state, magnetic coder 14 is usually phase
To static, by detecting the revolving speed for the magnet for following roller 9 to rotate, and then the displacement or speed of lift car operation are measured
Degree, obtain lift car operation speed whether in preset safe range, if in preset safe range, just
Often operation；If exceeding preset safe range, the brake outside the device is arranged in starting, carries out braking behaviour to it
Make.
9 center of roller is equipped with by wheel shaft 8, in order to facilitate the fixed installation of magnet 11, can will be arranged by the length of wheel shaft 8
The slightly longer than depth of 9 centre bore of roller, the two sides outer end of roller 9 is extended to by wheel shaft 8, and magnet 11 is fixedly mounted on by wheel shaft 8
The end face of one end, in order to facilitate the installation of roller 9 and stability during the work time, positioned at 9 two sides of roller on wheel shaft
Also rotatable shaft is connected to supporting plate 7, and supporting plate 7 may be rotatably mounted on bracket 1.
Magnet 11 is rounded, and consistent with by 8 end surface shape of wheel shaft, magnet 11 and roller 9 and 14 three of magnetic coder are concentric
Setting avoids position deviation from causing measurement data inaccurate.
Roller 9 in the present embodiment is always maintained at wirerope 15 or guide rail or traction sheave etc. to be contacted, and wirerope 15 or is led
The movement such as rail or traction sheave, drives roller 9 to rotate, and the magnet 11 in testing agency is moved synchronously with roller 9, and magnetic coder 14 is solid
It is fixed motionless, the revolving speed of roller 9 is detected by detecting speed of the magnet 11 under rotary state or displacement using magnetic coder 14
Or displacement, and then the displacement or speed under abnormality such as elevator wire rope 15 or guide rail or traction sheave are measured, obtain electricity
Whether the speed of terraced carriage operation is displaced in preset safe range, if in preset safe range, normally
Operation；If exceeding preset safe range, the brake outside the device is arranged in starting, carries out brake operating to it.
In addition, magnet 11 and magnetic coder 14 in testing agency detect the change in location of lift car when outer net off-position
Whether in preset safe range, if being operated normally in preset safe range；If not existing, starts outside and set
The brake switch set carries out safety operation.
1 side of bracket is rotatably mounted the first pulling plate 2, and rotatable shaft connects on the second pulling plate 4 on the first pulling plate 2, the
Two pulling plates, 4 rotatable shaft connects on supporting plate 7, and the first pulling plate 2, the second pulling plate 4, supporting plate 7 and bracket 1 are successively rotatably connected shape
At the swing mechanism of a swingable roller 9, facilitate the movement of 9 position of roller, roller 9 and wirerope 15 or guide rail or traction sheave etc.
Persistently it is kept in contact.
It is further provided with pulling plate axis 3 and branch board shaft 6, the setting of pulling plate axis 3 and branch board shaft 6 ensure that the stabilization of swing mechanism
Property, the structural strength of each connector junction in swing mechanism is enhanced, the probability for occurring being broken in use is reduced, is drawn
Between the first pulling plate 2 and the second pulling plate 4 that board shaft 3 may be rotatably mounted in one of swing mechanism and extend to another pendulum
Junction, that is, pulling plate axis 3 of the first pulling plate 2 and the second pulling plate 4 in motivation structure is mounted between two junctions, and branch board shaft 6 can
It is rotatably connected on two pieces of supporting plates 7, guarantees the installation site of 7 lower end of fixed supported slab while the stability of supporting plate 7, pacifying it
Fill activity in range.
It further include the operating mechanism for assisting roller 9 to work in the present embodiment, operating mechanism is mounted between supporting plate and bracket,
Under elevator normal operation, auxiliary roller 9 is persistently close to wirerope 15 or guide rail or traction sheave etc..Operating mechanism includes work
Make spring 5, working spring 5 is connected between pulling plate axis 3 and branch board shaft 6, in order to facilitate the dismounting of working spring 5, in branch board shaft 6
It is fixed with spring base 61,5 one end of working spring button is pulled on spring base 61, and other end button is pulled on pulling plate axis 3, working spring
5 can be two pieces, when elevator is under normal condition, in order to make roller 9 persistently abut elevator wire rope 15 or guide rail or traction sheave,
The setting of working spring 5 can effectively detect carriage real-time operating conditions.
9 side of roller is equipped with detection plate 12, and magnetic coder 14 is fixedly mounted in detection plate 12, and roller 9 is in rotation process
In, 14 position of magnetic coder is fixed, and in order to guarantee the accuracy of data in the detection process, and guarantees the steady of magnetic coder 14
Fixed, detection plate 12 is connected to the fixation that 12 position of detection plate is realized on the second pulling plate 4 by adjusting bolt 10, and then realizes that magnetic is compiled
The fixation of 14 position of code device.
The connecting terminal 13 being connected with outer signals receiver is additionally provided in detection plate 12, magnetic coder 14 is by telecommunications
Number or data conversion become can be used to communicate, the equipment of the signal form of transimission and storage, the connection of connecting terminal 13 facilitates number
According to the cable being transferred on external equipment in time, external equipment is facilitated to obtain the unusual condition of carriage in time, and then elevator is tieed up
It repairs, avoids the generation of contingency.
As shown in figure 4, wirerope 15 or guide rail or traction sheave etc. are touched with roller 9, testing agency is in running order, leads to
The frictional force generated between wirerope 15 or guide rail or traction sheave etc. and roller 9 is crossed, then magnet 11 is detected by magnetic coder 14
Displacement or speed, to measure the operation of carriage whether in preset safe range, if showing in preset safe range
Elevator is in normal operating condition；If starting the braking equipment of external setting not in preset safe range, to elevator into
Row brake operating.Apparatus of the present invention structure is simple, and manufacturing cost is low, but security performance is high, be conducive to device on the market
Popularization and application.
Embodiment 2: the present embodiment is distinguished with embodiment 1 and is characterized in that: driving mechanism includes decelerating motor 311 and electromagnet
313, driving mechanism realizes connecing between roller 9 and wirerope 15 or guide rail or traction sheave etc. by the position of mobile roller 9
Touching with it is non-contact.
As shown in figure 5, roller 9 is rotatably mounted on sliding rack 317, sliding rack 317 is mounted on sliding axle 321,
The output end of speed reducer 311 is connected with screw rod 325, and screw rod 325 is equipped with fixed plate 323, while fixed plate 323 is installed on sliding
Axis 321 is equipped with spring 315 on the sliding axle 321 between sliding rack 317 and electromagnet 313；Under abnormality, electromagnet 313
Power loss, electromagnet 313 are separated with the end face of sliding axle 321, and sliding axle 321 is under the drive of 315 active force of spring to wirerope
15 or guide rail or traction sheave etc. where direction it is mobile, roller 9 is contacted with above-mentioned wirerope 15 or guide rail or traction sheave etc..
Decelerating motor 311 is mounted in fixed plate 323 by connector sleeve 312, and is connect with screw rod 325, is set on screw rod 325
There is matched screw pushing block 324, in order to guarantee stability in the process of running, is set between sliding axle 321 and screw rod 325
There is fixing axle 322, screw pushing block 324 is threaded through in fixing axle 322 while being threaded through screw rod 325, prevents 324 turns of screw pushing block
It is dynamic.The two sides of screw pushing block 324 in fixing axle 322 are equipped with limited block A326 and limited block B327, avoid the mobile width of roller 9
It spends big.
Electromagnet 313 is mounted on electromagnetism brandreth 314, and electromagnetism brandreth 314 is mounted in fixed plate 323, and sliding axle 321 is logical
It crosses sliding bearing 320 to be mounted in another piece of fixed plate 323, guarantees the stability of mounting structure.
The working principle of the detection device is in the present embodiment:
When elevator is in abnormality, at this point, 313 power loss of electromagnet, sliding axle 321 pushes sliding under the action of spring 315
Axis 321 is run, and so that roller 9 is existed with wirerope 15 or guide rail or traction sheave etc. by the sliding rack 317 being mounted on sliding axle 321
It is rotated under the active force of spring 315.Mechanical contact 91 is provided on roller 9, when the displacement that roller 9 rotates is greater than preset set
When definite value, the brake of external setting is triggered by way of mechanically or electrically.
At elevator in normal state, decelerating motor 311 and electromagnet 311 are powered, and motor reducer 311 rotates forward, silk
Bar 325 rotates, and screw pushing block 324 moves downward, and pushes sliding axle 321 to move downward compressed spring 315, passes through limited block A326
Limit, electromagnet 313 is attracted locking by the end face of sliding axle 321 at this time, and decelerating motor 311 rotates backward, and passes through limited block
B327 stall stops decelerating motor 311, and after the completion of reset, electromagnet 313 and roller 9 are in state to be detected.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention；Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Although appended drawing reference in figure: 1, bracket is used more herein；2, the first pulling plate；3, pulling plate axis；4, it second draws
Plate；5, reset spring；6, branch board shaft；61, spring base；7, supporting plate；8, wheel shaft is leaned on；9, roller；91, mechanical contact；10, spiral shell is adjusted
Bolt；11, magnet；12, detection plate；13, connecting terminal；14, magnetic coder；15, wirerope；δ, magnet and magnetic coder away from
From；311, decelerating motor；312, connector sleeve；313, electromagnet；314, electromagnetism brandreth；315, spring；316, guiding axis；317,
Sliding rack；320, sliding bearing；321, sliding axle；322, fixing axle；323, fixed plate；324, screw pushing block；325, screw rod；
326, limited block A；327, the terms such as limited block B, but it does not exclude the possibility of using other terms.Only using these terms
It is to be more convenient to describe and explain essence of the invention；Being construed as any additional limitation is all and this hair
What bright spirit was disagreed.
Claims (10)
1. being used for the detection device of accidental movement of elevator cage and hypervelocity, it is characterised in that: including roller (9), the roller (9)
It is touched with wirerope (15) or guide rail or traction sheave；If a testing agency, the testing agency is used to detect the roller
(9), to detect lift car abnormality.
2. the detection device according to claim 1 for accidental movement of elevator cage and hypervelocity, it is characterised in that: described
Testing agency includes magnet (11) and magnetic coder (14)；The magnet (11) is installed on the roller (9) side, and the magnetic is compiled
Code device (14) and the magnet (11) is installed relatively and there are gaps.
3. the detection device according to claim 2 for accidental movement of elevator cage and hypervelocity, it is characterised in that: described
Magnet (11) is rounded, magnet (11), roller (9) and magnetic coder (14) three coaxial arrangement.
4. the detection device according to claim 1-3 for accidental movement of elevator cage and hypervelocity, feature
Be: roller (9) center is equipped with by wheel shaft (8)；The part for being located at the roller (9) two sides by wheel shaft (8) is connected with
Supporting plate (7), the supporting plate (7) are fixed on bracket (1).
5. be used for accidental movement of elevator cage and hypervelocity detection device, it is characterised in that: including roller (9), driving mechanism and
Testing agency；Under normal condition, the roller (9) separates with wirerope (15) or guide rail or traction sheave；Carriage is abnormal shifting
When dynamic or overspeed condition, the roller (9) touches with wirerope (15) or guide rail or traction sheave under the action of the drive mechanism, passes through
Wirerope or guide rail or traction sheave detect the operation exception state of elevator and trigger brake.
6. the detection device according to claim 5 for accidental movement of elevator cage and hypervelocity, it is characterised in that: described
Abnormality be elevator be parked in leveling gate opening state or elevator overspeed state or outer net off-position, the roller (9)
It is in contact with wirerope (15) or guide rail or traction sheave relative motion part.
7. the detection device according to claim 5 for accidental movement of elevator cage and hypervelocity, it is characterised in that: described
Testing agency includes magnet (11) and magnetic coder (14)；The magnet (11) is installed on the roller (9) side, and the magnetic is compiled
Code device (14) and the magnet (11) is installed relatively and there are gaps.
8. the detection device according to claim 5 for accidental movement of elevator cage and hypervelocity, it is characterised in that: described
Roller (9) center is equipped with by wheel shaft (8)；The part for being located at the roller (9) two sides by wheel shaft (8) is connected with supporting plate (7), institute
It states supporting plate (7) axis and connects bracket (1).
9. the detection device according to claim 8 for accidental movement of elevator cage and hypervelocity, it is characterised in that: also wrap
Include resetting-mechanism；The resetting-mechanism installation is between the fixing plates.
10. the detection device according to claim 5 for accidental movement of elevator cage and hypervelocity, it is characterised in that: institute
It states roller (9) to be installed on sliding rack (317), the sliding rack (317) is installed on sliding axle (321)；The driving mechanism includes
Decelerating motor (311) and electromagnet (313)；The output end of the speed reducer (311) is connected with screw rod (325), the screw rod
(325) fixed plate (323) are equipped with, while the fixed plate (323) is installed on the sliding axle (321)；The sliding rack
(317) spring (315) are also equipped on the sliding axle (321) between the electromagnet (313)；Under abnormality, electromagnet
Power loss, the electromagnet (313) separate with the end face of sliding axle (321), and the sliding axle (321) is returned in the spring (315)
It is mobile to the direction of the wirerope (15) or guide rail or traction sheave relative motion part under the drive of multiple power, the roller (9) with
The wirerope (15) or the contact of guide rail or traction sheave relative motion part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711375371.8A CN109928284B (en) | 2017-12-19 | 2017-12-19 | Detection device for accidental movement and overspeed of elevator car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711375371.8A CN109928284B (en) | 2017-12-19 | 2017-12-19 | Detection device for accidental movement and overspeed of elevator car |
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| Publication Number | Publication Date |
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| CN109928284A true CN109928284A (en) | 2019-06-25 |
| CN109928284B CN109928284B (en) | 2023-07-18 |
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| CN201711375371.8A Active CN109928284B (en) | 2017-12-19 | 2017-12-19 | Detection device for accidental movement and overspeed of elevator car |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112537707A (en) * | 2019-09-23 | 2021-03-23 | 杭州沪宁电梯部件股份有限公司 | Roller sensor |
| CN112978530A (en) * | 2021-02-01 | 2021-06-18 | 泰州威迈机电科技有限公司 | Elevator tows wire rope electromagnetic detection device |
| CN115258874A (en) * | 2022-08-16 | 2022-11-01 | 凯帝斯电梯股份有限公司 | Elevator overspeed prevention electric device |
| CN118030018A (en) * | 2024-04-11 | 2024-05-14 | 太原理工大学 | Mechanical measuring device for drilling speed of middle-deep geothermal well |
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| CN208603536U (en) * | 2017-12-19 | 2019-03-15 | 杭州沪宁电梯部件股份有限公司 | A kind of detection device for accidental movement of elevator cage and hypervelocity |
Cited By (7)
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| CN112978530B (en) * | 2021-02-01 | 2024-01-09 | 泰州威迈机电科技有限公司 | Elevator tows wire rope electromagnetic detection device |
| CN115258874A (en) * | 2022-08-16 | 2022-11-01 | 凯帝斯电梯股份有限公司 | Elevator overspeed prevention electric device |
| CN115258874B (en) * | 2022-08-16 | 2024-04-26 | 凯帝斯电梯股份有限公司 | Electrical device for overspeed prevention of elevator |
| CN118030018A (en) * | 2024-04-11 | 2024-05-14 | 太原理工大学 | Mechanical measuring device for drilling speed of middle-deep geothermal well |
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