CN113682932A - Dedicated control system of explosion-proof ladder - Google Patents
Dedicated control system of explosion-proof ladder Download PDFInfo
- Publication number
- CN113682932A CN113682932A CN202110940363.3A CN202110940363A CN113682932A CN 113682932 A CN113682932 A CN 113682932A CN 202110940363 A CN202110940363 A CN 202110940363A CN 113682932 A CN113682932 A CN 113682932A
- Authority
- CN
- China
- Prior art keywords
- safety
- circuit
- loop
- explosion
- control system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000004888 barrier function Effects 0.000 claims description 44
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 4
- 238000004880 explosion Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/02—Door or gate operation
- B66B13/14—Control systems or devices
- B66B13/143—Control systems or devices electrical
-
- 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
- B66B1/36—Means for stopping the cars, cages, or skips at predetermined levels
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Computer Networks & Wireless Communication (AREA)
- Elevator Control (AREA)
Abstract
The invention discloses a special control system for an explosion-proof ladder, which comprises a ground protection safety circuit, a leveling control circuit (6) connected in parallel on the ground protection safety circuit, a pair of overhaul bypass contacts (51) respectively connected in series on an overhaul safety circuit (5) and a pair of input bypass contacts (53) connected in series on a comprehensive input safety circuit (52). The invention has the characteristics of wider application range, high operation safety and convenient maintenance.
Description
Technical Field
The invention relates to an elevator control system, in particular to a control system special for an explosion-proof elevator.
Background
The explosion-proof ladder is an elevator with an explosion-proof function, and has very high requirements on safety performance. At present, the highest standard floor of an explosion-proof ladder is low, generally has only 6-8 floors, cannot meet the use requirement of high floors, and is relatively limited in application; the bypass function is not supported, so that the maintenance is troublesome, the abuse of short-circuit wires and the equipment damage and casualties caused by forgetting to remove the short-circuit wires after use are easy to occur, and the safety performance of the explosion-proof ladder is reduced; in addition, to the present circuit board design of opening the door in advance of elevator, not only the design is comparatively complicated, and the cost is higher moreover, and the security is also not enough, can not use well in explosion-proof ladder. Therefore, the existing explosion-proof ladder has the problems of limited application, insufficient safety performance and troublesome maintenance.
Disclosure of Invention
The invention aims to provide a control system special for an explosion-proof ladder. The invention has the characteristics of wider application range, high operation safety and convenient maintenance.
The technical scheme of the invention is as follows: the utility model provides a dedicated control system of explosion-proof ladder, includes ground protection safety circuit, and the last parallel connection of ground protection safety circuit has leveling control circuit again, still includes a pair of maintenance bypass contact and a pair of input bypass contact of establishing ties on synthesizing the input safety circuit of establishing ties on overhauing the safety circuit respectively.
In the special control system for the explosion-proof ladder, the ground protection safety circuit comprises a relay and a total safety barrier, the power end of the relay is connected with a power supply, the grounding end of the relay is connected with the ground, the output end of the relay is respectively connected with the input ends of the total safety barrier and the safety barrier circuit, the output end of the total safety barrier is respectively connected with the intrinsic safety circuit and the safety barrier circuit, and the power end of the total safety barrier is connected with the power supply.
In the control system special for the explosion-proof ladder, the intrinsic safety circuit comprises a landing door lock loop, a car door lock loop and a switch safety loop, the safety barrier circuit comprises a first sub safety barrier, a second sub safety barrier and a third sub safety barrier which are respectively and correspondingly connected with the landing door lock loop, the car door lock loop and the switch safety loop, and the output end of the main safety barrier is respectively connected with the landing door lock loop, the car door lock loop, the switch safety loop, the first sub safety barrier, the second sub safety barrier and the third sub safety barrier.
In the control system special for the explosion-proof ladder, a pair of landing door bypass contacts is connected in parallel to the landing door lock loop, and a pair of car door bypass contacts is connected in parallel to the car door lock loop.
In the special control system for the anti-explosion ladder, the re-leveling control circuit comprises a contactor KM1, a contactor KM2, a contactor KM3 and a contactor KM4 which are connected in parallel, wherein the contactor KM1 is connected with a power supply end, the contactor KM2 and the contactor KM3 are connected with a short-circuit safety loop, the contactor KM4 is connected with a door area signal loop, and the door area signal loop is further connected with the short-circuit safety loop.
In the control system special for the explosion-proof ladder, the overhaul safety loop, the comprehensive input safety loop and the short-circuit safety loop are all connected with the explosion-proof safety barrier.
In the control system special for the explosion-proof ladder, the control system further comprises a frequency converter, and the frequency converter is connected with the permanent magnet synchronous host.
Compared with the prior art, the grounding protection safety circuit adopts the optimization design of the combination of the relay and the total safety barrier, has the grounding protection functions of safety, reliability and sensitive response, expands the application floors of the elevator, and greatly improves the operation stability and the use safety of the elevator system;
bypass contacts are arranged in the overhaul safety circuit, the comprehensive input safety circuit and the grounding protection safety circuit, so that a bypass function is realized, a multiple protection effect is achieved, the maintenance of the elevator is more convenient, and the working efficiency is improved;
parallel connection's the flat bed control circuit again on having designed ground protection safety circuit, realize the function of opening a door in advance, fine motion flat bed, the function is various, improves operating efficiency and elevator operation security, convenience of customers goods business turn over elevator, and circuit structure is simple, and cost reduction is fit for extensive application.
Therefore, the invention has the characteristics of wider application range, high operation safety and convenient maintenance.
Drawings
FIG. 1 is a schematic diagram of a ground protection safety circuit;
FIG. 2 is a schematic diagram of the structure of the service safety loop;
FIG. 3 is a schematic diagram of the structure of the integrated input safety loop;
fig. 4 is a schematic diagram of the structure of the re-leveling control circuit.
The labels in the figures are: 1. a relay; 2. a total safety barrier; 3. an intrinsic safe circuit; 31. a landing door lock loop; 32. a car door lock loop; 33. switching a safety loop; 4. a barrier circuit; 41. a first sub-safety barrier; 42. a second sub-safety barrier; 43. a third division of safety barrier; 5. overhauling a safety loop; 51. overhauling the bypass contact; 52. a comprehensive input safety loop; 53. an input bypass contact; 54. a landing door bypass contact; 55. a car door bypass contact; 6. a re-leveling control circuit; 61. short-circuit the safety loop; 62. a gate area signal loop; 63. an explosion-proof safety barrier.
Detailed Description
The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention.
Example (b):
as shown in fig. 1 to 4, a control system dedicated for an explosion-proof ladder comprises a ground protection safety circuit, a leveling control circuit 6 connected in parallel to the ground protection safety circuit, a pair of inspection bypass contacts 51 respectively connected in series to the inspection safety circuit 5, and a pair of input bypass contacts 53 connected in series to the integrated input safety circuit 52.
A pair of overhauling bypass contacts 51 connected in series on the overhauling safety loop 5 plays a role in protection, and when the elevator is in a bypass state, the elevator is in an overhauling state and cannot normally run to prevent accidents; when the signal is connected, the auxiliary input bypass contact 53 connected in series on the integrated input safety loop 52 makes the integrated input safety loop 52 in a bypass state and unable to normally operate to prevent accidents, and plays a role in double protection by overhauling the bypass contact 51 and the input bypass contact 53.
The ground protection safety circuit comprises a relay 1 and a total safety grid 2, wherein the power end of the relay 1 is connected with a power supply, the grounding end of the relay 1 is connected with the ground, the output end of the relay 1 is respectively connected with the input ends of the total safety grid 2 and a safety grid circuit 4, the output end of the total safety grid 2 is respectively connected with an intrinsic safety circuit 3 and a safety grid circuit 4, and the power end of the total safety grid 2 is connected with the power supply.
The power supply of the intrinsic safety circuit 3 and the safety barrier circuit 4 is controlled through the normally closed contact of the relay 1, when the intrinsic safety circuit 3 is grounded due to air moisture or water inlet short circuit, the relay 1 is attracted, the normally closed contact is disconnected, the safety barrier circuit 4 loses a power supply, the intrinsic safety circuit 3 is disconnected and fails, the elevator loses a protection function, the elevator alarms, and the intrinsic safety circuit cannot normally run, so that casualties or property damage caused by accidents is prevented. The ground protection safety circuit adopts the optimization design of the relay 1 and the total safety grid 2, realizes the isolation of the circuit, prevents the high-current voltage from generating spark explosion or personal electric shock in the intrinsic safety circuit 3, has the safe and reliable response sensitive ground protection function, and greatly improves the running stability of an elevator system.
The intrinsic safety circuit 3 comprises a landing door lock loop 31, a car door lock loop 32 and a switch safety loop 33, the safety barrier circuit 4 comprises a first sub safety barrier 41, a second sub safety barrier 42 and a third sub safety barrier 43 which are respectively and correspondingly connected with the landing door lock loop 31, the car door lock loop 32 and the switch safety loop 33, and the output end of the main safety barrier 2 is respectively connected with the landing door lock loop 31, the car door lock loop 32, the switch safety loop 33, the first sub safety barrier 41, the second sub safety barrier 42 and the third sub safety barrier 43.
A pair of landing door bypass contacts 54 is connected in parallel to the landing door lock loop 31, and a pair of car door bypass contacts 55 is connected in parallel to the car door lock loop 32.
The arrangement of landing door bypass contacts 54 and car door bypass contacts 55 can short circuit the landing and car doors so that the elevator can bypass. The overhaul bypass contact 51, the input bypass contact 53, the landing door bypass contact 54 and the car door bypass contact 55 are all connected to the bypass plug-in, so that maintenance and repair of elevator maintenance personnel on the elevator are facilitated, the working efficiency of workers is improved, and abuse of short-circuit wires and forgetting to remove after use to cause equipment damage and casualties are prevented.
The re-leveling control circuit 6 comprises a contactor KM1, a contactor KM2, a contactor KM3 and a contactor KM4 which are connected in parallel, wherein the contactor KM1 is connected with a power supply end, the contactor KM2 and the contactor KM3 are connected with a short-circuit safety loop 61, the contactor KM4 is connected with a door area signal loop 62, and the door area signal loop 62 is respectively connected with the layer door lock loop 31, the car door lock loop 32 and the short-circuit safety loop 61. The output ends of the re-leveling control circuit 6 and the gate area signal loop 62 are also connected with the frequency converter respectively.
A power supply end provides 24v power to supply power to the leveling control circuit 6, a contactor KM1 is attracted, a door zone signal loop 62 sends a door zone signal to the leveling control circuit 6 through a short-circuit safety loop 61, when the leveling control circuit 6 receives door zone signals FL1 and FL2, the contactor KM2 and the contactor KM3 are also attracted, at the moment, a door zone signal SX1 of the door zone signal loop 62 is input to a frequency converter, and the frequency converter adopts NICE1000newThe frequency converter outputs a door sealing contactor signal SY to the re-leveling control circuit 6 through the door area signal loop 62, the contactor KM4 is attracted, the frequency converter receives a door sealing feedback signal SX2 at the moment and sends an instruction to the elevator, and the short circuit safety loop 61 and the door lock loop realize the micro motion of the elevator under the condition of opening the door, namely the functions of opening the door in advance and leveling the micro motion.
The re-leveling control circuit 6, the short-circuit safety circuit 61 and the door zone signal circuit 62 are combined and used in an elevator control system to realize leveling and micro-leveling functions when an elevator door is opened. Under the condition that the door is opened, the flat-layer door opening function is commonly called as the advance door opening function, the waiting time is shortened, and the operation efficiency is improved. The elevator has the advantages that the elevator has a micro leveling function under the condition that the door is opened, so that the elevator car is displaced up and down due to the fact that a traction steel wire rope stretches when goods or a transport vehicle enters and exits the elevator car, the elevator car sill and the landing sill are kept horizontal, and the goods or the vehicle can enter and exit the elevator conveniently.
And the overhaul safety loop 5, the comprehensive input safety loop 52 and the short circuit safety loop 61 are all connected with an explosion-proof safety barrier 63.
The control system further comprises a frequency converter, and the frequency converter is connected with the permanent magnet synchronous host. The permanent magnet synchronous host is adopted as a main dragging system, compared with an asynchronous host, the production cost is reduced, the size is small, the space of a machine room is saved, the structure is simple, the maintenance cost is reduced, and the running efficiency of the elevator is improved without a reduction gearbox. By utilizing the design of the safety barrier circuit 4, the explosion-proof safety barrier 63 and the permanent magnet synchronous host and matching with an elevator frequency converter, the application floor of the explosion-proof elevator is higher, can be expanded to 16 floors, and has wider application range.
The power supply adopts a 24V power supply.
Claims (7)
1. The utility model provides a dedicated control system of explosion-proof ladder which characterized in that: the ground protection safety circuit is connected with a rebating control circuit (6) in parallel, and further comprises a pair of overhaul bypass contacts (51) which are respectively connected in series on an overhaul safety loop (5) and a pair of input bypass contacts (53) which are connected in series on a comprehensive input safety loop (52).
2. The special control system for the explosion-proof ladder according to claim 1, characterized in that: the ground protection safety circuit comprises a relay (1) and a total safety grid (2), wherein a power end of the relay (1) is connected with a power supply, a grounding end of the relay (1) is connected with the ground, an output end of the relay (1) is respectively connected with input ends of the total safety grid (2) and a safety grid circuit (4), an output end of the total safety grid (2) is respectively connected with an intrinsic safety circuit (3) and the safety grid circuit (4), and a power end of the total safety grid (2) is connected with the power supply.
3. The special control system for the explosion-proof ladder according to claim 2, characterized in that: this ampere of circuit (3) is including layer door lock return circuit (31), sedan-chair door lock return circuit (32) and switch safety circuit (33), safety barrier circuit (4) including with layer door lock return circuit (31), sedan-chair door lock return circuit (32) and switch safety circuit (33) correspond first branch safety barrier (41) of being connected respectively, second branch safety barrier (42) and third branch safety barrier (43), the output of total safety barrier (2) respectively with layer door lock return circuit (31), sedan-chair door lock return circuit (32), switch safety circuit (33), first branch safety barrier (41), second branch safety barrier (42) and third branch safety barrier (43) are connected.
4. A special control system for an explosion-proof ladder according to claim 3, characterized in that: a pair of landing door bypass contacts (54) are connected in parallel on the landing door lock loop (31), and a pair of car door bypass contacts (55) are connected in parallel on the car door lock loop (32).
5. The special control system for the explosion-proof ladder according to claim 1, characterized in that: the re-leveling control circuit (6) comprises a contactor KM1, a contactor KM2, a contactor KM3 and a contactor KM4 which are connected in parallel, wherein the contactor KM1 is connected with a power supply end, the contactor KM2 and the contactor KM3 are connected with a short-circuit safety loop (61), the contactor KM4 is connected with a door area signal loop (62), and the door area signal loop (62) is also connected with the short-circuit safety loop (61).
6. The special control system for the explosion-proof ladder according to claim 5, characterized in that: and the overhaul safety loop (5), the comprehensive input safety loop (52) and the short circuit safety loop (61) are all connected with an explosion-proof safety barrier (63).
7. The special control system for the explosion-proof ladder according to claim 1, characterized in that: the control system further comprises a frequency converter, and the frequency converter is connected with the permanent magnet synchronous host.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110940363.3A CN113682932B (en) | 2021-08-17 | 2021-08-17 | Dedicated control system of explosion-proof ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110940363.3A CN113682932B (en) | 2021-08-17 | 2021-08-17 | Dedicated control system of explosion-proof ladder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113682932A true CN113682932A (en) | 2021-11-23 |
| CN113682932B CN113682932B (en) | 2023-04-28 |
Family
ID=78580190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110940363.3A Active CN113682932B (en) | 2021-08-17 | 2021-08-17 | Dedicated control system of explosion-proof ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113682932B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2101659U (en) * | 1991-03-04 | 1992-04-15 | 上海市房屋设备工程公司 | Safety electrical equipment of explosion-proof elevator |
| JPH08113440A (en) * | 1994-10-18 | 1996-05-07 | Mitsubishi Denki Bill Techno Service Kk | Safety device for work on elevator car |
| CN201857174U (en) * | 2010-10-13 | 2011-06-08 | 沈阳优力维特电梯制造厂 | Fully parallel mainboard control device for Ex elevator |
| CN202057999U (en) * | 2011-03-04 | 2011-11-30 | 湖北弘仪电子科技有限公司 | Explosion-proof distributed hanging type quantitive loading controller |
| CN103077632A (en) * | 2012-11-22 | 2013-05-01 | 郑州万特电气有限公司 | Isolation disconnecting link electric operating mechanism training device |
| CN106395518A (en) * | 2016-11-11 | 2017-02-15 | 西继迅达（许昌）电梯有限公司 | Elevator running control panel used for controlling priorities of maintenance devices |
| CN106829678A (en) * | 2017-03-03 | 2017-06-13 | 北京索德电气工业有限公司 | Multifunctional elevator car accidental movement protection system and method |
| CN110299703A (en) * | 2019-07-29 | 2019-10-01 | 南京市特种设备安全监督检验研究院 | A kind of lightning surge protection circuit of elevator door-motor |
| DE102018010197A1 (en) * | 2018-12-18 | 2020-06-18 | GRID INVENT gGmbH | Electronic element and electrically controlled display element |
| CN215797735U (en) * | 2021-08-17 | 2022-02-11 | 恒达富士电梯有限公司 | Dedicated control circuit of explosion-proof ladder |
-
2021
- 2021-08-17 CN CN202110940363.3A patent/CN113682932B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2101659U (en) * | 1991-03-04 | 1992-04-15 | 上海市房屋设备工程公司 | Safety electrical equipment of explosion-proof elevator |
| JPH08113440A (en) * | 1994-10-18 | 1996-05-07 | Mitsubishi Denki Bill Techno Service Kk | Safety device for work on elevator car |
| CN201857174U (en) * | 2010-10-13 | 2011-06-08 | 沈阳优力维特电梯制造厂 | Fully parallel mainboard control device for Ex elevator |
| CN202057999U (en) * | 2011-03-04 | 2011-11-30 | 湖北弘仪电子科技有限公司 | Explosion-proof distributed hanging type quantitive loading controller |
| CN103077632A (en) * | 2012-11-22 | 2013-05-01 | 郑州万特电气有限公司 | Isolation disconnecting link electric operating mechanism training device |
| CN106395518A (en) * | 2016-11-11 | 2017-02-15 | 西继迅达（许昌）电梯有限公司 | Elevator running control panel used for controlling priorities of maintenance devices |
| CN106829678A (en) * | 2017-03-03 | 2017-06-13 | 北京索德电气工业有限公司 | Multifunctional elevator car accidental movement protection system and method |
| DE102018010197A1 (en) * | 2018-12-18 | 2020-06-18 | GRID INVENT gGmbH | Electronic element and electrically controlled display element |
| CN110299703A (en) * | 2019-07-29 | 2019-10-01 | 南京市特种设备安全监督检验研究院 | A kind of lightning surge protection circuit of elevator door-motor |
| CN215797735U (en) * | 2021-08-17 | 2022-02-11 | 恒达富士电梯有限公司 | Dedicated control circuit of explosion-proof ladder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113682932B (en) | 2023-04-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210652699U (en) | Power supply interlocking control device for railway vehicle workshop | |
| CN215797735U (en) | Dedicated control circuit of explosion-proof ladder | |
| CN107187967B (en) | Safe elevator maintenance control device | |
| CN113682932A (en) | Dedicated control system of explosion-proof ladder | |
| CN106678129B (en) | Automatic telescopic for police service platform controls hydraulic system and control circuit | |
| CN208120487U (en) | A kind of elevator rescue system | |
| CN208666831U (en) | Shallow pit elevator electrical safety circuit | |
| WO2023123793A1 (en) | Elevator controller and elevator | |
| CN212655312U (en) | Elevator safety control system | |
| CN109650203B (en) | Shallow pit installs elevator additional and electrical system thereof | |
| CN210339971U (en) | Elevator subtracts stroke function safety circuit | |
| CN111115401B (en) | Additional elevator safety loop and elevator safety system | |
| CN212354005U (en) | Medium-low speed magnetic suspension turnout lock pin device | |
| CN209974022U (en) | Shallow pit installs elevator additional and electrical system thereof | |
| CN204897065U (en) | Construction elevator with trouble display device | |
| CN108298417A (en) | Passenger transportation system and its start-up and shut-down control method | |
| CN201169475Y (en) | Elevator control cabinet without machine room | |
| CN209113274U (en) | A kind of synchronous and asynchronous elevator functional universal safe circuit board | |
| CN212258817U (en) | Small-size mining soft starter | |
| CN212315236U (en) | Bistable electromagnetic safety device for elevator | |
| CN208932724U (en) | A kind of elevator installation circumscribed IC card operation control system | |
| CN211826993U (en) | Power transformer cooler control box | |
| CN216583676U (en) | Double-door safety window | |
| CN217705716U (en) | Shelter top cover platform control circuit | |
| CN210667449U (en) | Subway power supply simulation sand table |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A Special Control System for Explosion proof Ladders Effective date of registration: 20231111 Granted publication date: 20230428 Pledgee: Nanxun Rural Commercial Bank of Zhejiang, Limited by Share Ltd. Pledgor: HENGDA FUJI ELEVATOR Co.,Ltd. Registration number: Y2023330002600 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |