CN213294343U - Device for online detecting ascending overspeed protection function of elevator car - Google Patents
Device for online detecting ascending overspeed protection function of elevator car Download PDFInfo
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- CN213294343U CN213294343U CN202021679630.3U CN202021679630U CN213294343U CN 213294343 U CN213294343 U CN 213294343U CN 202021679630 U CN202021679630 U CN 202021679630U CN 213294343 U CN213294343 U CN 213294343U
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- 230000001174 ascending effect Effects 0.000 title claims description 12
- 238000001514 detection method Methods 0.000 claims abstract description 28
- 238000006073 displacement reaction Methods 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 230000006870 function Effects 0.000 claims description 11
- 239000011295 pitch Substances 0.000 claims description 7
- 230000007547 defect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
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- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
本实用新型公开了一种在线检测电梯轿厢上行超速保护功能的装置，包括钢丝绳，钢丝绳的两端分别与轿厢、对重连接，钢丝绳的中间挂在两个滚轮上，其特征在于，所述两个滚轮之间的钢丝绳一侧设有检测装置，检测装置包括检测钢丝绳运行速度及减速度的激光位移传感器；钢丝绳位于机房位置的一侧设有电梯轿厢上行超速保护装置。本实用新型的装置设置在电梯机房驱动主机附近，通过激光位移传感器检测钢丝绳运行速度及减速度，间接检测轿厢运行速度及轿厢上行超速保护装置动作时候的电梯速度和减速度，使得检测人员能快速、准确检测轿厢上行超速保护装置的功能，及时发现该装置存在的缺陷。
The utility model discloses a device for on-line detection of the upward overspeed protection function of an elevator car. A detection device is provided on one side of the wire rope between the two rollers, and the detection device includes a laser displacement sensor for detecting the running speed and deceleration of the wire rope; the side of the wire rope located in the machine room is provided with an elevator car upward overspeed protection device. The device of the utility model is arranged near the driving main engine of the elevator machine room. The laser displacement sensor detects the running speed and deceleration of the steel wire rope, and indirectly detects the running speed of the car and the elevator speed and deceleration when the car upward overspeed protection device operates, so that the detection personnel The function of the car upward overspeed protection device can be quickly and accurately detected, and the defects of the device can be found in time.
Description
Technical Field
The utility model relates to an on-line measuring elevator car goes upward overspeed protect function's device belongs to elevator technical field.
Background
The safety gear of the elevator car is a protection device for overspeed descending caused by falling of the car, and the protection for ascending of the car is implemented by an overspeed ascending protection device. The overspeed protection device is an important safety protection device on the elevator. An elevator car crash accident due to its failure occurs occasionally. For example, in 2015, 8 months, 20 days and evening, a resident building in the north area of the sea lock is reached, and when a resident takes the elevator from the 1 st building to the 25 th building, the elevator directly slides and rushes to the top without stopping at the 25 th building, so that the top guard rail of the elevator car is deformed, the suspended ceiling of the elevator car falls off, and the fracture of the thigh of the resident is taken for medical service, so that the resident is fortunate and has no life risk. The accident investigation shows that the car ascending overspeed protection device of the elevator does not act.
At present, a tester detects the car ascending overspeed protection device on site without a special instrument, mainly inspects the stopping distance of the elevator by visual inspection, and judges whether the elevator is qualified according to experience.
The national standard GB7588-2003 "elevator manufacturing and installation safety code" states that the car overspeed protection device upstream of the car comprises a speed monitoring (governor) and a deceleration element (brake), and should be able to detect a loss of speed of the upstream car with a lower limit of 115% of the rated speed of the elevator and an upper limit of 1.1 times the speed of the upstream action of the governor, and should be able to arrest the car or at least reduce its speed to the design range of the counterweight buffer. When the car ascending overspeed protection device stops an empty car, the deceleration of the car ascending overspeed protection device is not larger than 1 gn.
Disclosure of Invention
The to-be-solved technical problem of the utility model is: how to quickly and accurately detect the overspeed protection device on the lift car.
In order to solve the technical problem, the technical scheme of the utility model is to provide a device for on-line detection of elevator car up-going overspeed protection function, including wire rope, wire rope's both ends respectively with the car, to heavy being connected, the middle of wire rope is hung on two gyro wheels, its characterized in that, wire rope one side between two gyro wheels is equipped with detection device, detection device includes the laser displacement sensor that detects wire rope functioning speed and deceleration; one side of the steel wire rope at the machine room position is provided with an elevator car ascending overspeed protection device.
Preferably, the detection device further comprises a CPU, a memory and a display, wherein the CPU is respectively connected with the memory, the display and the laser displacement sensor.
Preferably, the detection device further comprises a trigger which is arranged on the safety loop relay and acts synchronously with the safety loop relay, and the trigger is connected with the CPU.
Preferably, a plurality of screw pitches are uniformly distributed on the surface of the steel wire rope.
The utility model discloses a device sets up near elevator machine room drive host computer, detects wire rope functioning speed and deceleration through laser displacement sensor, detects elevator speed and deceleration when car functioning speed and car go upward overspeed protection device action indirectly for detection personnel can go upward overspeed protection device's function by quick, the accurate detection car, in time discovers the defect that the device exists.
Drawings
Fig. 1 is a schematic structural diagram of a device for detecting an overspeed protection function of an elevator car on line;
FIG. 2 is a line drawing of a steel wire rope thread curve detected by a constant speed running sensor;
FIG. 3 is a diagram of a sensor detecting a wire rope thread profile during braking;
FIG. 4 is a graph of time and velocity;
FIG. 5 is a schematic diagram of a laser displacement sensor detecting a wire rope;
fig. 6 is a functional block diagram of an apparatus for online detection of an overspeed protection function in an elevator car.
Detailed Description
In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
The utility model provides an on-line measuring elevator car goes upward overspeed protect function's device, as shown in fig. 1, fig. 6, it includes wire rope 3, wire rope 3's both ends respectively with car 1, to heavy 2 connections, hang on two gyro wheels 6 in the middle of wire rope 3, 3 one sides of wire rope between two gyro wheels 6 are equipped with detection device 4, detection device 4 is including the laser displacement sensor 5 that detects 3 functioning speed of wire rope and deceleration, CPU, the memory, the display, CPU connects the memory respectively, display and laser displacement sensor 5. A plurality of screw pitches are uniformly distributed on the surface of the steel wire rope 3. The detection device 4 further comprises a trigger which is connected with the CPU, and the trigger is arranged on the safety loop relay and acts synchronously with the safety loop relay.
As shown in fig. 5, the laser displacement sensor 5 acquires the number of the thread pitches of the wire rope 3 passing through in a certain time by acquiring the change of the distance d of the thread pitch on the surface of the wire rope 3, indirectly measures the moving speed of the wire rope 3, and differentiates the speed to acquire the deceleration during braking.
Before detection, parameters such as a wire rope pitch distance d, a rope winding ratio and the like are set.
When the elevator normally operates, the utility model discloses a device record elevator functioning speed, when the people for making going upward of overspeed electric safety device or the stop device action of overspeed governor, electric safety circuit disconnection, safety circuit relay release simultaneously drives the trigger action, and switching signal of release gives CPU, triggers CPU and begins to record elevator braking process's data, obtains speed through the displacement differential, and the speed differential reachs the deceleration.
Use the utility model discloses a method that detection device detected as follows:
a) in the maintenance state of the elevator, the electric safety loop should be disconnected by artificially actuating the uplink overspeed electric safety device of the speed limiter;
b) the elevator is restored to a normal state, the empty car is stopped at the lower part of the elevator stroke, the car runs upwards at the maintenance speed in an empty way, an electrical safety loop is manually disconnected, an up-going overspeed electrical safety device or a stopping device of the speed limiter acts, and the car can stop running;
c) restoring the elevator to a normal state, stopping the empty-load car at the lower part of the elevator stroke, taking measures to prevent the car from moving, fixing a device for detecting the overspeed of the car ascending near a steel wire rope of a machine room, aligning a laser displacement sensor to the steel wire rope, starting the elevator, and setting parameters such as the pitch distance d of the steel wire rope, the rope winding ratio and the like;
d) the lift car moves upwards at a rated speed, and an upward overspeed electric safety device or a stopping device of the speed limiter is manually operated to trigger a speed reducing device to operate;
e) adjusting operation parameters of an elevator control system or other methods to enable the maximum operation speed of the car to be greater than the action speed of the speed limiter, and enabling the car to accelerate and ascend to the speed limiter to trigger the speed reducer to act;
f) and after the test is finished, the elevator is restored to a normal state.
g) And checking the action speed and the deceleration value of the elevator on the detection device, and comparing the action speed and the deceleration value with the national standard value to obtain a final detection result.
As shown in fig. 2-4, when the elevator runs at a constant speed, the thread data of the steel wire rope 3 collected by the laser displacement sensor 5 is an equidistant voltage sine wave; when the elevator is stopped emergently, the running speed of the steel wire rope 3 is reduced until the steel wire rope stops, and the thread data of the steel wire rope 3, which is acquired by the laser displacement sensor 5, is a waveform with constant voltage amplitude and gradually-lengthened wavelength.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021679630.3U CN213294343U (en) | 2020-08-13 | 2020-08-13 | Device for online detecting ascending overspeed protection function of elevator car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021679630.3U CN213294343U (en) | 2020-08-13 | 2020-08-13 | Device for online detecting ascending overspeed protection function of elevator car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213294343U true CN213294343U (en) | 2021-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021679630.3U Active CN213294343U (en) | 2020-08-13 | 2020-08-13 | Device for online detecting ascending overspeed protection function of elevator car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213294343U (en) |
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2020
- 2020-08-13 CN CN202021679630.3U patent/CN213294343U/en active Active
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