CN112811277A - 125% times rated load brake test protection device and method for traction elevator - Google Patents
125% times rated load brake test protection device and method for traction elevator Download PDFInfo
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- CN112811277A CN112811277A CN202110179725.1A CN202110179725A CN112811277A CN 112811277 A CN112811277 A CN 112811277A CN 202110179725 A CN202110179725 A CN 202110179725A CN 112811277 A CN112811277 A CN 112811277A
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- 238000012360 testing method Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- 238000001514 detection method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/3492—Position or motion detectors or driving means for the detector
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B3/00—Applications of devices for indicating or signalling operating conditions of elevators
- B66B3/002—Indicators
-
- 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)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses a 125% times rated load brake test protection device and method for a traction elevator, which comprises a controller, a non-body actuating mechanism, a Hall sensor and a distance measuring sensor, wherein the non-body actuating mechanism is used for braking a speed limiter steel wire rope in an elevator body, the Hall sensor is used for detecting the power supply state of a driving host and the open door state of an elevator flat floor, and the distance measuring sensor is used for detecting the running distance of the elevator in a shaft, the input end of the controller is connected with the output end of the Hall sensor and the output end of the distance measuring sensor, the output end of the controller is connected with the control end of the non-body actuating mechanism, and the device and the method can effectively avoid safety accidents caused by the uncontrolled sliding of a lift car when the 125% times rated load.
Description
Technical Field
The invention belongs to the field of elevators, and relates to a 125% times rated load brake test protection device and method for a traction elevator.
Background
The traction drive elevator has the outstanding advantages of energy conservation, large lifting distance and the like, and is the mainstream of the vertical lifting elevator of the modern building. Braking test requirements of the traction drive elevator: the car is loaded with 125% of rated load capacity, when the car runs at normal running speed, the power supply of the motor and the brake is cut off, the brake can stop the operation of the driving main machine, and the car is not obviously deformed and damaged after the test. During the braking test, it is often found that although the driving main machine can stop running after the power supply of the driving main machine is cut off, the traction steel wire rope slides on the traction sheave for a long distance, which means that the cage is out of control and slides for a long distance in the process, and the elevator descending braking test is unqualified. Elevator inspection rules require a down-going braking test: the car is loaded with 125% of rated load, descends to the lower part of the travel at normal running speed, cuts off the power supply of the motor and the brake, and the car should be stopped completely. The 2 tests have great safety risks while testing the comprehensive performances of the elevator such as traction capacity, braking characteristics and the like. Since the test is performed, a plurality of safety accidents such as too long low-speed sliding distance of the car and even the crouching bottom of the car caused by insufficient braking force and traction force, the crouching bottom of the car during loading and unloading of the car before and after the test and the like are reported in succession.
If no measures are taken in the braking test to effectively prevent and control the possible out-of-control sliding of the car, the car squat bottom can damage the car and pit equipment, and meanwhile, the counterweight can possibly rush to top to cause serious accidents; if the lift car is out of control and slides when loading and unloading loads, safety accidents such as shearing, extrusion and the like can be caused.
Along with the increasing of the number of elevators, the product quality is uneven along with price competition, and professional elevator maintenance technicians are relatively lack, so that the potential safety hazards are increasingly prominent. Therefore, it is of great significance to design a protection device for the uncontrolled sliding of the car in the 125% load braking test.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a 125% rated load brake test protection device and method for a traction elevator, which can effectively avoid safety accidents caused by the uncontrolled sliding of a lift car when a 125% rated load brake test is executed in the detection process of the traction elevator.
In order to achieve the aim, the 125% rated load brake test protection device for the traction elevator comprises a controller, a non-body actuating mechanism, a Hall sensor and a distance measuring sensor, wherein the non-body actuating mechanism is used for stopping a speed limiter steel wire rope in an elevator body, the Hall sensor is used for detecting the power supply state of a driving host machine and the horizontal floor opening state of the elevator, the distance measuring sensor is used for detecting the running distance of the elevator in a shaft, the input end of the controller is connected with the output end of the Hall sensor and the output end of the distance measuring sensor, and the output end of the controller is connected with the control end of the non-body.
The non-body executing mechanism comprises a support and an electromagnetic type clamping mechanism used for clamping a speed limiter steel wire rope, wherein the support is fixed on a car guide rail in the elevator body, the electromagnetic type clamping mechanism is fixed on the support, and the output end of the controller is connected with the control end of the electromagnetic type clamping mechanism.
The electromagnetic type clamping mechanism comprises an electromagnetic clamping block, an adjusting screw rod, an adjusting nut and an adjusting spring, wherein the speed limiter steel wire rope penetrates through the electromagnetic clamping block, the end part of the adjusting screw rod is connected with a clamping part in the electromagnetic clamping block, the adjusting nut is sleeved on the adjusting screw rod, the adjusting spring is positioned between a shell of the electromagnetic clamping block and the adjusting nut, and the controller is connected with a power supply control end of the electromagnetic clamping block.
The device also comprises a resetting mechanism, wherein the resetting mechanism is connected with the controller.
The controller is connected with the resetting mechanism through a resetting mechanism control line.
The controller is connected with the non-body actuating mechanism through an electromagnetic clamping block control line.
A125% rated load brake test protection method for a traction elevator comprises the following steps:
before and after the elevator performs the 125% load brake test, the elevator car stops at the loading and unloading floor, then the door is opened, and 1.25 times of the elevator car is loaded and unloadedThe lift car is in a braking state under the rated load, in the process, the controller measures the distance h between the distance measuring sensor and the lift car through the distance measuring sensor, meanwhile, the hall sensor detects that the lift door is opened in a flat layer after reaching the floor of the pre-loading and unloading load, and when the loading and unloading load is carried out, the distance h between the bridge car and the distance measuring sensor at the current time is recorded0Then h and h are calculated0The difference value is used as the sliding distance L of the car, and the sliding distance L of the car is compared with the preset allowable sliding distance [ L ]a]Comparing when L is greater than [ L ]a]When the elevator is out of control, the controller sends an action instruction to the non-body executing mechanism to trigger the electromagnetic clamping block to act, so that the speed limiter steel wire rope and the safety tongs in the elevator body are pulled to stop, the elevator car continues to pull the speed limiter steel wire rope to move downwards until the elevator car safety tongs are lifted to block the elevator car guide rail, and finally the elevator car is stopped.
In the process that the load of the lift car is 1.25 times of the rated load and the lift car descends at the rated speed, the power supply of the driving host and the brake is cut off to carry out the braking test of the lift car, the controller detects the distance h between the lift car and the distance measuring sensor through the distance measuring sensor, meanwhile, the power supply condition of the driving host is detected through the Hall sensor, and when the controller detects the power loss of the driving host through the Hall sensor, the controller acquires the distance h between the current lift car and the distance measuring sensor0Then h and h are calculated0The difference value is used as the car sliding distance L, and when the car sliding distance L is larger than the preset allowable sliding distance [ L ]b]When the elevator is out of control, the controller sends an action instruction to the non-body executing mechanism to trigger the electromagnetic clamping block to mechanically act, so that the steel wire rope of the speed limiter and the safety tongs pull the linkage mechanism to stop, the lift car continuously pulls the steel wire rope of the speed limiter to descend at the moment until the safety tongs of the lift car are lifted to clamp the guide rail of the lift car, and finally the lift car stops.
Further comprising: the controller displays the sliding distance and the instantaneous speed of the car when sending the action command through the display.
The invention has the following beneficial effects:
when the 125% rated load braking test protection device and the method for the traction elevator are operated specifically, the controller detects the power supply state of the driving host and the opening state of the elevator flat floor through the Hall sensor, detects the running distance of the elevator in the shaft through the distance measuring sensor, judges whether the elevator is out of control according to the detected quantity, and when the elevator is out of control, the elevator is braked through the non-body execution mechanism, so that the safety accident caused by the out-of-control sliding of the elevator car when the 125% rated load braking test is executed in the detection process of the traction elevator is effectively avoided.
Drawings
Fig. 1 is a layout view of the present invention in a traction elevator;
FIG. 2 is a protection flow chart under working conditions;
FIG. 3 is a protection flow chart under condition 2;
FIG. 4 is a schematic layout of a non-self-actuating mechanism.
The elevator safety system comprises a car 1, a car safety gear 2, a car guide rail 3, a safety gear lifting linkage mechanism 4, a hoisting steel wire rope 5, a speed governor 6, a speed governor steel wire rope 7, a speed governor steel wire rope tension pulley 8, a tension device counterweight 9, a counterweight guide rail 10, a counterweight 11, a floor plate 12, a guide pulley 13, a hoisting machine base 14, a traction sheave 15, a control cabinet 16, a hoisting machine power line 17, a hall sensor 18, a controller 19, a distance measurement sensor 20, a non-body actuator 21, a bracket 210, an electromagnetic clamping block 211, an adjusting screw 212, an adjusting nut 213, an adjusting spring 214, an electromagnetic clamping block control line 215, a resetting mechanism control line 216, a resetting mechanism 217 and an electromagnetic clamping mechanism 218.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, in an elevator body, a car guide rail 3 and a counterweight guide rail 10 are mounted on a concrete wall of an elevator shaft wall through a guide rail bracket, for an elevator with a machine room, a traction machine base 14 and a speed limiter 6 are disposed in an elevator machine room, and for an elevator without a machine room, the traction machine base 14 and a traction sheave 15 may be disposed inside the elevator shaft or at other positions; overspeed governor 6 is located elevator well top and installs on the support of well inner wall, two car safety tongs 2 and safety tong carry and draw link gear 4 and locate car 1 on, overspeed governor wire rope 7 carry with safety tong and draw link gear 4 and be connected, overspeed governor wire rope 7 bypasses overspeed governor 6 and overspeed governor wire rope take-up pulley 8, two car safety tongs 2 set up respectively in car 1's both sides and cooperate with car guide rail 3, make overspeed governor wire rope 7 compress tightly the overspeed governor rope sheave through the counter weight of overspeed governor wire rope take-up pulley 8 to ensure that overspeed governor wire rope 7 and rope sheave have sufficient frictional force in order to drive the rotation of overspeed governor rope sheave.
When the elevator normally operates, the car 1 pulls the overspeed governor steel wire rope 7 to drive the rotation of the overspeed governor rope, when the elevator exceeds 1.15 times of rated downlink, the overspeed governor 6 triggers the braking mechanism of the overspeed governor steel wire rope 7 to act and brakes the overspeed governor steel wire rope 7 and the safety gear lifting linkage mechanism 4, at the moment, the car 1 continues to pull the overspeed governor steel wire rope 7 to downlink, the car safety gear 2 can be lifted to clamp the car guide rail 3, the car 1 is finally braked, and the downlink safety protection device of the elevator body can only possibly play a role when the downlink speed of the elevator exceeds 1.15 times of the rated value.
Referring to fig. 1, the 125% rated load braking test protection device for a traction elevator comprises a controller 19, a non-body actuator 21 for stopping a speed governor steel wire rope 7 in an elevator body, a hall sensor 18 for detecting a power supply state of a driving host machine and a door opening state of an elevator flat floor, and a distance measuring sensor 20 for detecting a running distance of the elevator in a hoistway, wherein an input end of the controller 19 is connected with an output end of the hall sensor 18 and an output end of the distance measuring sensor 20, and an output end of the controller 19 is connected with a control end of the non-body actuator 21.
Referring to fig. 4, the non-body actuator 21 includes a bracket 210 and an electromagnetic clamping mechanism 218 for clamping the governor rope 7, wherein the bracket 210 is fixed to the car guide rail 3 in the elevator body, the electromagnetic clamping mechanism 218 is fixed to the bracket 210, and an output end of the controller 19 is connected to a control end of the electromagnetic clamping mechanism 218, wherein the electromagnetic clamping mechanism 218 includes an electromagnetic clamping block 211, an adjusting screw 212, an adjusting nut 213, and an adjusting spring 214, wherein the governor rope 7 passes through the electromagnetic clamping block 211, an end of the adjusting screw 212 is connected to a clamping member in the electromagnetic clamping block 211, the adjusting nut 213 is sleeved on the adjusting screw 212, the adjusting spring 214 is located between a housing of the electromagnetic clamping block 211 and the adjusting nut 213, and the controller 19 is connected to a power supply control end of the electromagnetic clamping block 211.
The present invention further includes a reset mechanism 217, wherein the reset mechanism 217 is coupled to the controller 19.
The controller 19 is connected with a resetting mechanism 217 through a resetting mechanism control line 216; the controller 19 is connected to the non-body actuator 21 via an electromagnetic clamp block control line 215.
The 125% rated load brake test protection method for the traction elevator comprises the following steps:
referring to fig. 2, in the working condition 1, before and after the elevator performs a 125% load braking test, the car 1 stops at a loading and unloading floor and then is opened, 1.25 times of rated load is loaded and unloaded into the car 1, so that the car 1 is in a braking state, in the process, the controller 19 measures the distance h between the distance measuring sensor 20 and the car 1 through the distance measuring sensor 20, simultaneously detects that the elevator reaches the loading and unloading floor through the hall sensor 18 and then is opened at a flat floor, and records the distance h between the bridge car 1 and the distance measuring sensor 20 at the current time when the elevator is loaded and unloaded0Then h and h are calculated0The difference value is used as the sliding distance L of the car, and the sliding distance L of the car is compared with the preset allowable sliding distance [ L ]a]Comparing when L is greater than [ L ]a]When the elevator is out of control, the controller 19 sends an action command to the non-body execution mechanism 21 to trigger the electromagnetic clamping block 211 to act, so that the speed governor steel wire rope 7 and the safety gear lifting linkage mechanism 4 in the elevator body are stopped, at the moment, the car 1 continues to pull the speed governor steel wire rope 7 to move downwards until the car safety gear 2 is lifted to clamp the car guide rail 3, and finally the car 1 is stopped.
Referring to the figure, condition 2, the load on the car 1 is 1.25 timesDuring the process that the rated load descends at the rated speed, the power supply of the driving main engine and the brake is cut off to carry out the braking test of the car 1, the controller 19 detects the distance h between the car 1 and the distance measuring sensor 20 through the distance measuring sensor 20, meanwhile, the power supply condition of the driving main engine is detected through the Hall sensor 18, when the controller 19 detects the power loss of the driving main engine through the Hall sensor 18, the controller 19 obtains the distance h between the current car 1 and the distance measuring sensor 200Then h and h are calculated0The difference between the two is taken as 1 car sliding distance L, and when the car sliding distance L is larger than the preset allowable sliding distance [ L ]b]When the elevator is out of control, the controller 19 sends an action command to the non-body execution mechanism 21 to trigger the electromagnetic clamping block 211 to mechanically act, so that the speed governor steel wire rope 7 and the safety gear lifting linkage mechanism 4 are stopped, at the moment, the car 1 continues to pull the speed governor steel wire rope 7 to move downwards until the car safety gear 2 is lifted to clamp the car guide rail 3, and finally the car 1 is stopped.
The invention also includes: the controller 19 displays the sliding distance and the instantaneous speed of the car 1 when the motion command is sent on the display.
When the protection device is operated under the working condition 1 or the working condition 2 and after a related technician removes the danger potential danger of elevator runaway, the controller 19 controls the reset mechanism 217 to drive the electromagnetic clamping block 211 to compress the adjusting spring 214 so as to recover the state before the mechanical action and lock the position of the electromagnetic clamping block; the electromagnetic clamping block 211 and the reset mechanism 217 are respectively controlled by the controller 19 through corresponding control lines or wireless control, and the two ways of control are electrically interlocked to avoid simultaneous action.
Claims (8)
1. The 125% rated load brake test protection device for the traction elevator is characterized by comprising a controller (19), a non-body actuating mechanism (21) used for stopping a speed governor steel wire rope (7) in an elevator body, a Hall sensor (18) used for detecting the power supply state of a driving host and the horizontal floor opening state of the elevator, and a distance measuring sensor (20) used for detecting the running distance of the elevator in a hoistway, wherein the input end of the controller (19) is connected with the output end of the Hall sensor (18) and the output end of the distance measuring sensor (20), and the output end of the controller (19) is connected with the control end of the non-body actuating mechanism (21).
2. The 125% rated load brake test protection device for the traction elevator is characterized in that the non-body actuator (21) comprises a support (210) and an electromagnetic clamping mechanism (218) for clamping a speed governor steel wire rope (7), wherein the support (210) is fixed on a car guide rail (3) in the elevator body, the electromagnetic clamping mechanism (218) is fixed on the support (210), and the output end of the controller (19) is connected with the control end of the electromagnetic clamping mechanism (218).
3. The 125% rated load brake test protection device of the traction elevator according to claim 1, wherein the electromagnetic clamping mechanism (218) comprises an electromagnetic clamping block (211), an adjusting screw (212), an adjusting nut (213) and an adjusting spring (214), wherein the speed governor steel wire rope (7) penetrates through the electromagnetic clamping block (211), the end of the adjusting screw (212) is connected with a clamping part in the electromagnetic clamping block (211), the adjusting nut (213) is sleeved on the adjusting screw (212), the adjusting spring (214) is located between a shell of the electromagnetic clamping block (211) and the adjusting nut (213), and the controller (19) is connected with a power supply control end of the electromagnetic clamping block (211).
4. The 125% load rated brake test protection device for the traction elevator according to claim 1, further comprising a reset mechanism (217), wherein the reset mechanism (217) is connected with the controller (19).
5. The 125% load rated brake test protection device for a traction elevator according to claim 1, characterized in that the controller (19) is connected to the reset mechanism (217) via a reset mechanism control line (216).
6. The 125% load rating brake test protection device for a traction elevator according to claim 1, wherein the controller (19) is connected to the non-body actuator (21) via an electromagnetic clamping block control line (215).
7. A125% rated load brake test protection method for a traction elevator is characterized by comprising the following steps:
before and after an elevator performs a 125% load braking test, a car (1) stops at a loading and unloading floor and then is opened, 1.25 times of rated load is unloaded into the car (1) to enable the car (1) to be in a braking state, in the process, a controller (19) measures the distance h between a distance measuring sensor (20) and the car (1) through the distance measuring sensor (20), meanwhile, a Hall sensor (18) detects that the elevator reaches the pre-loading and unloading floor and then is opened in a flat layer, and when the loading and unloading are carried out, the distance h between the bridge car (1) and the distance measuring sensor (20) at the current time is recorded0Then h and h are calculated0The difference value is used as the sliding distance L of the car, and the sliding distance L of the car is compared with the preset allowable sliding distance [ L ]a]Comparing when L is greater than [ L ]a]When the elevator is out of control, the controller (19) sends an action command to the non-body execution mechanism (21) to trigger the electromagnetic clamping block (211) to act, so that a speed governor steel wire rope (7) and a safety gear lifting linkage mechanism (4) in the elevator body are stopped, the elevator car (1) continues to pull the speed governor steel wire rope (7) to descend until the safety gear (2) of the elevator car is lifted to block the elevator car guide rail (3), and finally the elevator car (1) is stopped;
in the process that the load of the car (1) is 1.25 times of the rated load and the car descends at the rated speed, the power supply of a driving host and a brake is cut off to carry out a braking test of the car (1), a controller (19) detects the distance h between the car (1) and a distance measuring sensor (20) through a distance measuring sensor (20), meanwhile, the power supply condition of the driving host is detected through a Hall sensor (18), and when the controller (19) detects the power loss of the driving host through the Hall sensor (18), the controller (19) obtains the distance h between the current car (1) and the distance measuring sensor (20)0Then h and h are calculated0The difference between the two is taken as 1 car sliding distance L, and when the car sliding distance L is larger than the preset allowable sliding distance [ L ]b]When the elevator is out of control, the controller (19) executes the operation to the non-bodyThe mechanism (21) sends an action command to trigger the electromagnetic clamping block (211) to mechanically act, so that the speed limiter steel wire rope (7) and the safety gear lifting linkage mechanism (4) are stopped, at the moment, the car (1) continues to pull the speed limiter steel wire rope (7) to descend until the car safety gear (2) is lifted to clamp the car guide rail (3), and finally the car (1) is stopped.
8. The method for protecting a 125% rated load brake test of a traction elevator according to claim 7, further comprising: the controller (19) displays the sliding distance and the instantaneous speed of the car (1) when sending the action command through the display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110179725.1A CN112811277B (en) | 2021-02-07 | 2021-02-07 | Braking test protection device and method for traction elevator with 125% times rated load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110179725.1A CN112811277B (en) | 2021-02-07 | 2021-02-07 | Braking test protection device and method for traction elevator with 125% times rated load |
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| Publication Number | Publication Date |
|---|---|
| CN112811277A true CN112811277A (en) | 2021-05-18 |
| CN112811277B CN112811277B (en) | 2024-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110179725.1A Active CN112811277B (en) | 2021-02-07 | 2021-02-07 | Braking test protection device and method for traction elevator with 125% times rated load |
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| CN (1) | CN112811277B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115352973A (en) * | 2022-08-05 | 2022-11-18 | 伊萨智能电梯有限公司 | Intelligent elevator with face recognition function |
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| JP2011148578A (en) * | 2010-01-21 | 2011-08-04 | Nippon Otis Elevator Co | Electromagnetic brake inspection device of elevator |
| CN203392664U (en) * | 2013-06-05 | 2014-01-15 | 北京升华电梯有限公司 | Speed governor device for straight-running elevator |
| CN212356184U (en) * | 2020-09-02 | 2021-01-15 | 天津市特种设备监督检验技术研究院(天津市特种设备事故应急调查处理中心) | Escalator braking distance on-line detection device |
| CN214359618U (en) * | 2021-02-07 | 2021-10-08 | 陕西省特种设备检验检测研究院 | 125% times rated load brake test protection device for traction elevator |
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2021
- 2021-02-07 CN CN202110179725.1A patent/CN112811277B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2008222394A (en) * | 2007-03-14 | 2008-09-25 | Hitachi Ltd | Elevator device |
| JP2011148578A (en) * | 2010-01-21 | 2011-08-04 | Nippon Otis Elevator Co | Electromagnetic brake inspection device of elevator |
| CN203392664U (en) * | 2013-06-05 | 2014-01-15 | 北京升华电梯有限公司 | Speed governor device for straight-running elevator |
| CN212356184U (en) * | 2020-09-02 | 2021-01-15 | 天津市特种设备监督检验技术研究院(天津市特种设备事故应急调查处理中心) | Escalator braking distance on-line detection device |
| CN214359618U (en) * | 2021-02-07 | 2021-10-08 | 陕西省特种设备检验检测研究院 | 125% times rated load brake test protection device for traction elevator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115352973A (en) * | 2022-08-05 | 2022-11-18 | 伊萨智能电梯有限公司 | Intelligent elevator with face recognition function |
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| CN112811277B (en) | 2024-08-20 |
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