CN109353924A - A kind of door opening machine for elevator protective device - Google Patents

A kind of door opening machine for elevator protective device Download PDF

Info

Publication number
CN109353924A
CN109353924A CN201811432756.8A CN201811432756A CN109353924A CN 109353924 A CN109353924 A CN 109353924A CN 201811432756 A CN201811432756 A CN 201811432756A CN 109353924 A CN109353924 A CN 109353924A
Authority
CN
China
Prior art keywords
unit
door opening
elevator
opening machine
circuit
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
Application number
CN201811432756.8A
Other languages
Chinese (zh)
Other versions
CN109353924B (en
Inventor
胡宏宝
刘经高
罗丽龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Endsheng Elevator Co Ltd
Original Assignee
Guangdong Endsheng Elevator Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guangdong Endsheng Elevator Co Ltd filed Critical Guangdong Endsheng Elevator Co Ltd
Priority to CN201811432756.8A priority Critical patent/CN109353924B/en
Publication of CN109353924A publication Critical patent/CN109353924A/en
Application granted granted Critical
Publication of CN109353924B publication Critical patent/CN109353924B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66BELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B13/00Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
    • B66B13/02Door or gate operation
    • B66B13/14Control systems or devices
    • B66B13/143Control systems or devices electrical
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66BELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B3/00Applications of devices for indicating or signalling operating conditions of elevators
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66BELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/0006Monitoring devices or performance analysers
    • B66B5/0018Devices monitoring the operating condition of the elevator system
    • B66B5/0031Devices monitoring the operating condition of the elevator system for safety reasons
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66BELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Indicating And Signalling Devices For Elevators (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Elevator Control (AREA)

Abstract

The invention discloses a kind of door opening machine for elevator protective devices; including casing; the casing internal is fixed with partition; the partition bottom is fixed with control unit, timing unit and connecting and disconnecting of the circuit unit and top is fixed with current detecting unit, voltage detection unit, rectification unit and seamless unit, and the connecting pin of described control unit is equipped with alarm unit.The present invention forms the triple protection of half-closed loop control mode in electric current, voltage and conduction time tripartite in face of door opening machine for elevator; effectively door opening machine for elevator is avoided to be burned; to reduce maintenance cost; shorten the time required for repairing; elevator situation deactivated for a long time is avoided, the influence caused by people's production, life and work is reduced.

Description

A kind of door opening machine for elevator protective device
Technical field
The present invention relates to elevator technology field, in particular to a kind of door opening machine for elevator protective device.
Background technique
There are two types of control technologies for the door opening machine for elevator in elevator design, production, use at present, and one is use closed loop control The door opening machine for elevator of technical controlling processed is used primarily on passenger's elevator;It is another then be using open-loop control technology control electricity Terraced door lifter is used primarily on Cargo Lift and low side elevator, and the door opening machine for elevator of open-loop control technology control burns out and accounts for elevator and open 95% or more of door machine failure, once door lifter is burnt out, door lifter is replaced or repaired to only split door machine, exists simultaneously dimension Repair it is costly, deactivate elevator door time it is long the disadvantages of, cause to seriously affect to the production of people, life and work.
Therefore, it is necessary to solve the above problems to invent a kind of door opening machine for elevator protective device.
Summary of the invention
The purpose of the present invention is to provide a kind of door opening machine for elevator protective devices, by utilizing current detecting unit, voltage Current parameters, voltage parameter in detection unit and timing unit real-time detection door opening machine for elevator in driving unit current point in time And conduction time, to form the three of half-closed loop control mode in face of door opening machine for elevator in electric current, voltage and conduction time tripartite It protects again, effectively door opening machine for elevator is avoided to be burned, to reduce maintenance cost, shorten the time required for repairing, avoid making At the situation that elevator is deactivated for a long time, the influence caused by people's production, life and work is reduced, to solve above-mentioned background skill The problem of being proposed in art.
To achieve the above object, the invention provides the following technical scheme: a kind of door opening machine for elevator protective device, including machine Shell, the casing internal are fixed with partition, and the partition bottom is fixed with control unit, timing unit and connecting and disconnecting of the circuit list Member and top are fixed with current detecting unit, voltage detection unit, rectification unit and seamless unit, described control unit Connecting pin is equipped with alarm unit;
The output end of the timing unit, the output end of current detecting unit, voltage detection unit output end with control The input terminal of unit processed connects, the input of the input terminal of the connecting and disconnecting of the circuit unit, the input terminal of rectification unit and seamless unit End is connect with the output end of control unit;
Described control unit is used for the opening and closing of control circuit on-off unit, so that circuit turns between access and open circuit It changes, while control unit receives data that current detecting unit and voltage detection unit detect and carries out processing and root to it It is run according to processing result control rectification unit with seamless unit or alarm unit is alarmed;
The timing unit is for recording conduction time and record data being sent to control unit;
The connecting and disconnecting of the circuit unit is for converting circuit between access and open circuit;
The current detecting unit is used to detect the current values in power supply circuit;
The voltage detection unit is used to detect the voltage value in power supply circuit;
The rectification unit is for adjusting voltage value in power supply circuit;
The seamless unit is for adjusting current values in power supply circuit;
The alarm unit is for alarming.
Preferably, the alarm unit includes alarm and network interface, and the output end of the network interface is equipped with backstage Server.
Preferably, the output end of the background server is equipped with terminal, and the terminal includes computer and mobile phone.
Preferably, the input terminal of the current detecting unit is equipped with power supply, and the input terminal of the power supply is equipped with Door opening machine for elevator.
Preferably, it is equipped with driving unit inside the door opening machine for elevator, the driving unit is set as servo motor.
Preferably, it is equipped with heat sink on the outside of the casing, the heat sink is fixedly connected with casing.
Preferably, described control unit is set as programmable PLC, and the timing unit is set as timer, the circuit On-off unit is set as relay.
Preferably, the current detecting unit is set as ammeter, and the voltage detection unit is set as voltmeter, described Rectification unit is set as rectifier, and the seamless unit is set as seamless device.
Technical effect and advantage of the invention:
1, door opening machine for elevator is in door opening process for the first time and in door closing procedure, current detecting unit, voltage detection unit and Timing unit measures in door opening machine for elevator the current parameters, voltage parameter of driving unit relative point in time and conduction time simultaneously respectively The data forwarding that will test is to control unit, and control unit carries out preservation to the data and as template data, in electricity During the follow-up operation of terraced door lifter, current detecting unit, voltage detection unit and timing unit real-time detection door-opened elevator Current parameters, voltage parameter and conduction time and the data forwarding that will test in machine in driving unit current point in time are extremely controlled Unit processed, control unit compare the data with template data, reach setting numerical value when the data are differed with template data When, control unit control alarm unit is alarmed, while control circuit on-off unit is opened, so that power supply line is breaking, from And stop the operation of door opening machine for elevator, to form semiclosed loop in face of door opening machine for elevator in electric current, voltage and conduction time tripartite The triple protection of control mode, effectively avoids door opening machine for elevator from being burned, to reduce maintenance cost, shortens required for repairing Time avoids elevator situation deactivated for a long time, reduces the influence caused by people's production, life and work;
2, by being equipped with rectification unit and seamless unit, in order in the power supply circuit current parameters and voltage parameter and Template data difference within the set range when, in power supply circuit electric current and voltage be adjusted, to make in circuit Current values and the rated current numerical value and nominal voltage number of voltage value and door opening machine for elevator are similar, and elevator is effectively reduced The running wastage of door lifter extends the service life of door opening machine for elevator;
3, by being equipped with network interface, background server and terminal, in order to which when needing to alarm, control unit can be incited somebody to action Fault-signal, to background server, then is forwarded directly to overhaul by background server by network again by network interface transfers The mobile phone or computer of personnel, to realize the effect of remote alarms.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention.
Fig. 2 is system structure diagram of the invention.
Fig. 3 is alarm unit structural schematic diagram of the invention.
In figure: 1 casing, 2 partitions, 3 control units, 4 timing units, 5 connecting and disconnecting of the circuit units, 6 current detecting units, 7 electricity Press detection unit, 8 rectification units, 9 seamless units, 10 alarm units, 11 alarms, 12 network interfaces, 13 background servers, 14 Terminal, 15 power supplies, 16 door opening machine for elevator, 17 driving units, 18 heat sinks.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
Embodiment 1
The present invention provides a kind of door opening machine for elevator protective device as shown in Figs. 1-3, including casing 1, in the casing 1 Portion is fixed with partition 2, and 2 bottom of partition is fixed with control unit 3, timing unit 4 and connecting and disconnecting of the circuit unit 5 and top Portion is fixed with current detecting unit 6, voltage detection unit 7, rectification unit 8 and seamless unit 9, the company of described control unit 3 It connects end and is equipped with alarm unit 10;
The output end of the timing unit 4, the output end of current detecting unit 6, voltage detection unit 7 output end with The input terminal of control unit 3 connects, the input terminal of the connecting and disconnecting of the circuit unit 5, the input terminal of rectification unit 8 and seamless unit 9 Input terminal connect with the output end of control unit 3;
Described control unit 3 is used for the opening and closing of control circuit on-off unit 5, so that circuit is between access and open circuit Conversion, while control unit 3 receives the data that detect with voltage detection unit 7 of current detecting unit 6 and handles it And rectification unit 8 is controlled according to processing result and is alarmed with the operation of seamless unit 9 or alarm unit 10;
The timing unit 4 is for recording conduction time and record data being sent to control unit 3;
The connecting and disconnecting of the circuit unit 5 is for converting circuit between access and open circuit;
The current detecting unit 6 is used to detect the current values in power supply circuit;
The voltage detection unit 7 is used to detect the voltage value in power supply circuit;
The rectification unit 8 is for adjusting voltage value in power supply circuit;
The seamless unit 9 is for adjusting current values in power supply circuit;
The alarm unit 10 is for alarming.
As can be seen from the above embodiments: door opening machine for elevator 16 is in door opening process for the first time and in door closing procedure, current detecting list Member 6, voltage detection unit 7 and timing unit 4 measure the electric current of 17 relative point in time of driving unit in door opening machine for elevator 16 respectively Parameter, voltage parameter and conduction time and the data forwarding that will test to control unit 3, control unit 3 carry out the data It saves and as template data, during the follow-up operation of door opening machine for elevator 16, current detecting unit 6, voltage detecting Current parameters, voltage ginseng in 4 real-time detection door opening machine for elevator 16 of unit 7 and timing unit in 17 current point in time of driving unit To control unit 3, control unit 3 carries out the data and template data pair for several and conduction time and the data forwarding that will test Than when the data are differed with template data reaches setting numerical value, control unit 3 controls alarm unit 10 and alarms, simultaneously Control circuit on-off unit 5 is opened so that power supply line is breaking, to stop the operation of door opening machine for elevator 16, thus electric current, Voltage and conduction time tripartite form the triple protection of half-closed loop control mode in face of door opening machine for elevator 16, effectively elevator are avoided to open Door machine 16 is burned, to reduce maintenance cost, shortens the time required for repairing, and avoids elevator feelings deactivated for a long time Condition reduces the influence caused by people's production, life and work.
Embodiment 2
Further, in above-described embodiment 1, the alarm unit 10 includes alarm 11 and network interface 12, described The output end of network interface 12 is equipped with background server 13, by being equipped with network interface 12, background server 13 and terminal 14, with Convenient for when needing to alarm, fault-signal can be transferred to background server 13 by network interface 12 by control unit 3, then The mobile phone or computer of service personnel are forwarded directly to by network by background server 13 again, to realize the effect of remote alarms Fruit.
Further, in above-described embodiment 1, the output end of the background server 13 is equipped with terminal 14, the terminal 14 include computer and mobile phone.
Further, in above-described embodiment 1, the input terminal of the current detecting unit 6 is equipped with power supply 15, described The input terminal of power supply 15 is equipped with door opening machine for elevator 16.
Further, in above-described embodiment 1, driving unit 17, the driving are equipped with inside the door opening machine for elevator 16 Unit 17 is set as servo motor.
Further, in above-described embodiment 1, heat sink 18, the heat sink 18 and casing are equipped on the outside of the casing 1 1 is fixedly connected.
Further, in above-described embodiment 1, described control unit 3 is set as programmable PLC, and the timing unit 4 is set It is set to timer, the connecting and disconnecting of the circuit unit 5 is set as relay.
Further, in above-described embodiment 1, the current detecting unit 6 is set as ammeter, the voltage detecting list Member 7 is set as voltmeter, and the rectification unit 8 is set as rectifier, and the seamless unit 9 is set as seamless device.
Working principle of the present invention:
Referring to Figure of description 1 and attached drawing 2, when work, operation need to carry out self study operation, i.e. door opening machine for elevator 16 for the first time In door opening process for the first time and in door closing procedure, current detecting unit 6, voltage detection unit 7 and timing unit 4 measure electricity respectively Current parameters, voltage parameter and the conduction time of 17 relative point in time of driving unit and the data that will test in terraced door lifter 16 It is forwarded to control unit 3, control unit 3 carries out preservation to the data and as template data, in door opening machine for elevator 16 During follow-up operation, driven in 4 real-time detection door opening machine for elevator 16 of current detecting unit 6, voltage detection unit 7 and timing unit Current parameters, voltage parameter and conduction time in 17 current point in time of moving cell and the data forwarding that will test are to controlling list Member 3, control unit 3 compares the data with template data, when the data are differed with template data reaches setting numerical value, Control unit 3 controls alarm unit 10 and alarms, while control circuit on-off unit 5 is opened, so that power supply line is breaking, from And stop the operation of door opening machine for elevator 16, to form half in face of door opening machine for elevator 16 in electric current, voltage and conduction time tripartite The triple protection of close-loop control mode effectively avoids door opening machine for elevator 16 from being burned, to reduce maintenance cost, shortens REPSH repair shop The time needed avoids elevator situation deactivated for a long time, reduces the shadow caused by people's production, life and work It rings;
Referring to Figure of description 1 and attached drawing 2, by being equipped with rectification unit 8 and seamless unit 9, in order to work as power supply circuit In current parameters when differing within the set range with voltage parameter with template data, to the electric current and voltage in power supply circuit It is adjusted, to make the rated current numerical value of current values in circuit and voltage value and door opening machine for elevator 16 and specified Voltage value is similar, and the running wastage of door opening machine for elevator 16 is effectively reduced, and extends the service life of door opening machine for elevator 16;
Referring to Figure of description 3, by being equipped with network interface 12, background server 13 and terminal 14, in order to when needs When alarm, fault-signal can be transferred to background server 13 by network interface 12 by control unit 3, then again by taking from the background Business device 13 is forwarded directly to the mobile phone or computer of service personnel by network, to realize the effect of remote alarms.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention, Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features, All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention Within protection scope.

Claims (8)

1. a kind of door opening machine for elevator protective device, including casing (1), it is characterised in that: be fixed with inside the casing (1) every Plate (2), partition (2) bottom are fixed with control unit (3), timing unit (4) and connecting and disconnecting of the circuit unit (5) and top It is fixed with current detecting unit (6), voltage detection unit (7), rectification unit (8) and seamless unit (9), described control unit (3) connecting pin is equipped with alarm unit (10);
The output end of the timing unit (4), the output end of current detecting unit (6), the output end of voltage detection unit (7) are equal It is connect with the input terminal of control unit (3), the input terminal of the connecting and disconnecting of the circuit unit (5), the input terminal of rectification unit (8) and whole The input terminal of pressure unit (9) is connect with the output end of control unit (3);
Described control unit (3) is used for the opening and closing of control circuit on-off unit (5), so that circuit is between access and open circuit Conversion, at the same control unit (3) receive data that current detecting unit (6) and voltage detection unit (7) detect and to its into Row is handled and is alarmed according to processing result control rectification unit (8) and seamless unit (9) operation or alarm unit (10);
The timing unit (4) is for recording conduction time and record data being sent to control unit (3);
The connecting and disconnecting of the circuit unit (5) is for converting circuit between access and open circuit;
The current detecting unit (6) is used to detect the current values in power supply circuit;
The voltage detection unit (7) is used to detect the voltage value in power supply circuit;
The rectification unit (8) is for adjusting voltage value in power supply circuit;
The seamless unit (9) is for adjusting current values in power supply circuit;
The alarm unit (10) is for alarming.
2. a kind of door opening machine for elevator protective device according to claim 1, it is characterised in that: alarm unit (10) packet Alarm (11) and network interface (12) are included, the output end of the network interface (12) is equipped with background server (13).
3. a kind of door opening machine for elevator protective device according to claim 2, it is characterised in that: the background server (13) Output end be equipped with terminal (14), the terminal (14) includes computer and mobile phone.
4. a kind of door opening machine for elevator protective device according to claim 1, it is characterised in that: the current detecting unit (6) input terminal is equipped with power supply (15), and the input terminal of the power supply (15) is equipped with door opening machine for elevator (16).
5. a kind of door opening machine for elevator protective device according to claim 4, it is characterised in that: the door opening machine for elevator (16) Inside is equipped with driving unit (17), and the driving unit (17) is set as servo motor.
6. a kind of door opening machine for elevator protective device according to claim 1, it is characterised in that: set on the outside of the casing (1) Have heat sink (18), the heat sink (18) is fixedly connected with casing (1).
7. a kind of door opening machine for elevator protective device according to claim 1, it is characterised in that: described control unit (3) is set It is set to programmable PLC, the timing unit (4) is set as timer, and the connecting and disconnecting of the circuit unit (5) is set as relay.
8. a kind of door opening machine for elevator protective device according to claim 1, it is characterised in that: the current detecting unit (6) it is set as ammeter, the voltage detection unit (7) is set as voltmeter, and the rectification unit (8) is set as rectifier, The seamless unit (9) is set as seamless device.
CN201811432756.8A 2018-11-28 2018-11-28 Elevator door operator protection device Active CN109353924B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811432756.8A CN109353924B (en) 2018-11-28 2018-11-28 Elevator door operator protection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811432756.8A CN109353924B (en) 2018-11-28 2018-11-28 Elevator door operator protection device

Publications (2)

Publication Number Publication Date
CN109353924A true CN109353924A (en) 2019-02-19
CN109353924B CN109353924B (en) 2021-07-02

Family

ID=65343330

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811432756.8A Active CN109353924B (en) 2018-11-28 2018-11-28 Elevator door operator protection device

Country Status (1)

Country Link
CN (1) CN109353924B (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2595781Y (en) * 2002-12-31 2003-12-31 顾玉生 Special frequency changer for lift door machine
JP2005104667A (en) * 2003-09-30 2005-04-21 Mitsubishi Electric Corp Control device for elevator door
CN102923538A (en) * 2012-07-06 2013-02-13 天津大学 Elevator health management and maintenance system based on Internet of things and collection and assessment method
CN103922214A (en) * 2014-03-11 2014-07-16 深圳市海浦蒙特科技有限公司 Elevator door motor control method
CN105490608A (en) * 2015-12-30 2016-04-13 上海贝思特门机有限公司 Permanent-magnet elevator door motor controller and control method thereof
CN106629354A (en) * 2016-12-14 2017-05-10 杭州法维莱科技有限公司 Door machine controller with double permanent magnet motors
CN106946132A (en) * 2017-05-04 2017-07-14 上海贝思特门机有限公司 The Elevator Door Control device of automatic identification door quality

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2595781Y (en) * 2002-12-31 2003-12-31 顾玉生 Special frequency changer for lift door machine
JP2005104667A (en) * 2003-09-30 2005-04-21 Mitsubishi Electric Corp Control device for elevator door
CN102923538A (en) * 2012-07-06 2013-02-13 天津大学 Elevator health management and maintenance system based on Internet of things and collection and assessment method
CN103922214A (en) * 2014-03-11 2014-07-16 深圳市海浦蒙特科技有限公司 Elevator door motor control method
CN105490608A (en) * 2015-12-30 2016-04-13 上海贝思特门机有限公司 Permanent-magnet elevator door motor controller and control method thereof
CN106629354A (en) * 2016-12-14 2017-05-10 杭州法维莱科技有限公司 Door machine controller with double permanent magnet motors
CN106946132A (en) * 2017-05-04 2017-07-14 上海贝思特门机有限公司 The Elevator Door Control device of automatic identification door quality

Also Published As

Publication number Publication date
CN109353924B (en) 2021-07-02

Similar Documents

Publication Publication Date Title
AU2010321499B2 (en) Live welding method and device for aluminum electrolytic cell overhauling under series full current
CN102158129B (en) Solar photovoltaic system and fault detection method thereof
CN203806884U (en) Elevator cloud system allowing manufacturers to be responsible for elevators for life
CN106532962B (en) Multiterminal flexible direct current converter station centralized control method, device and system
CN106229996A (en) A kind of system realizing the operation of SVG device multi-machine parallel connection and control method thereof
CN207184325U (en) A kind of high-voltage direct current (DC) power system and control device
CN108588763A (en) Electrolytic cell and its crust-breaking & baiting system
CN102722156B (en) Method for displaying fault of control system and controlling fault tolerance in production process of metallurgy industry
CN201820129U (en) Intelligent controller of transformer cooling system
CN109353924A (en) A kind of door opening machine for elevator protective device
CN106597346A (en) Electronic current transformer laser energy supply self-diagnosis method and system thereof
CN111509779B (en) Parallel bus multi-output power supply and switching control system of diesel generating set
CN207861647U (en) A kind of hoistway door closed state detecting system
CN107482667B (en) A kind of control method preventing equipment over-voltage and control device
CN106026370A (en) PLC-based 110kV transformer substation DC power supply system backup device
CN205039548U (en) Low -voltage reactive power compensation device
CN208479176U (en) A kind of short-circuit protection template of frequency converter
CN208158236U (en) Intelligent building total management system
CN209930228U (en) ECC management system for industrial enterprise comprehensive energy management and control
CN109861179A (en) A kind of bus protection voltage-switching method suitable for powering mode of handing in hand
CN202956649U (en) Variable frequency energy-saving control and remote wireless management system for air compressor
CN104836332A (en) Parallel power supplying method of electrolytic aluminum different-power-supply-point direct-current sides
CN213476048U (en) Oil quenching tank
CN219592164U (en) Control system for grid connection and disconnection of diesel generating set and commercial power
CN209472219U (en) A kind of intelligent power distribution cabinet

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