CN209448412U - One kind being applied to motor multifunctional intelligent remote monitoring and protects system - Google Patents
One kind being applied to motor multifunctional intelligent remote monitoring and protects system Download PDFInfo
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- CN209448412U CN209448412U CN201920486008.1U CN201920486008U CN209448412U CN 209448412 U CN209448412 U CN 209448412U CN 201920486008 U CN201920486008 U CN 201920486008U CN 209448412 U CN209448412 U CN 209448412U
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Abstract
The utility model relates to arrive a kind of electric motor protecting technical field, and in particular to protect system to a kind of motor multifunctional intelligent remote monitoring that is applied to.Including being detachably secured to the intracorporal wet sensitive probe of motor casing, vibration probe and water droplet probe, the left bearing ceiling temperature switch and left bearing limiting temperature switch of induction left bearing temperature are removably fixed on the bearing holder (housing, cover) of motor left end cap, the right bearing ceiling temperature switch and right bearing limiting temperature switch of induction right bearing temperature are removably fixed on the bearing holder (housing, cover) of motor right end cap, the end turn of motor stator is removably fixed with coil ceiling temperature switch, and the electric machine casing annular on the outside of end turn is fixed with heating tape.The utility model; have automatic monitoring defencive function, can each position operation conditions of real-time monitoring motor, and superior control unit Real-time Feedback; all kinds of hidden danger and failure because that cannot find to occur in motor operation course in time can be effectively avoided, and causes motor damage and burns.
Description
Technical field
The utility model relates to arrive a kind of electric motor protecting technical field, and in particular to be applied to motor multifunctional intelligence to a kind of
It can long-range monitor protective system.
Background technique
Motor has been widely used in industries such as machining, metallurgy, coal, petroleum, chemical industry and household electrical appliances.
Motor in actual use, the working condition of severe running environment and super technical indicator is to lead to all kinds of electricity of motor
The main reason for gas failure generates, electrical fault or damage bring direct and consequential damage are quite huge.According to incomplete
Statistics, national middle size motor about 20,000,000 used, the motor burnt every year account for about 16%, about 3,200,000, are averaged every
1000 yuan of the maintenance cost of platform, total cost are 3,200,000,000 yuan or so.
Now with, for column, for many years always field control is respectively recovered the oil joint in each oil recovery factory's production process in Zhongyuan Oil Field
It stands the start and stop of well site motor, goes from strength to strength with production-scale, well site and oil recovery factory's multi-purpose station distance are more and more remote, while by
On site requirement of explosion proof, place limitation etc. factors restriction, each multi-purpose station in present oil recovery factory well site operation substantially nobody
It is on duty, it is gradually replaced by wireless video monitoring system, although there is video monitoring, motor occurred in the process of running
Stream, undercurrent, disconnected phase, stall, turn-to-turn short circuit, phase fault, over-voltage, under-voltage, electric leakage, leak, humidity, vibration, three-phase imbalance,
When the hidden danger of overheat, bearing wear, rotor eccentric wear, winding aging etc. occurs, failure can not find and exclude in time, lead to electricity
Burning for machine but happens occasionally, and is especially blowing hard, is raining heavily, snowing heavily etc. in special circumstances, needs employee to pass through control
When cabinet starts and stops motor operation, employee, which can not operate, under such conditions dare not also be operated, can to the life security of employee
It can cause greatly to threaten, under the overall situation of the depressed crude oil price decline of oil field production yields, increase cost for oil production.
It, can after being applied to motor multifunctional (remote control or cable) connection intelligent remote monitoring protection system now with one kind
With very good solution this problem.The advantages that it is rapid with installation, monitoring is convenient, command range is remote, and protection motor is not damaged,
Therefore multi-functional (remote control or cable) the connection intelligent monitoring remote protecting system of large-size machine especially adapts to unattended well site
And other places.In the case of special weather, starting and stopping for control cabinet can be remotely operated, makes the more steady safety of motor
Operation, while the safety of employee is ensured, the safety of employee is improved, and is reduced the motor burnt, is repaired motor
Number is also reduced, and reduces unit employment cost, all extremely important no matter from production, operation and management aspect.
Utility model content
The technical problem to be solved by the utility model is to one kind can remotely monitor inner shaft of motor hold, coil temperature,
Humidity and motor shock conditions inside electric machine casing and make that it stops operating in motor abnormality situation to be applied to motor more
Function intelligent remote monitoring protects system.
To achieve the goals above, technical solution provided by the utility model is:
One kind being applied to motor multifunctional intelligent remote monitoring and protects system, including to be detachably secured to motor casing intracorporal
Wet sensitive probe, vibration probe and water droplet are popped one's head in, and induction left bearing temperature is removably fixed on the bearing holder (housing, cover) of motor left end cap
Left bearing ceiling temperature switch and left bearing limiting temperature switch, and it is right that induction is removably fixed on the bearing holder (housing, cover) of motor right end cap
The right bearing ceiling temperature switch and right bearing limiting temperature switch, the end turn of motor stator of bearing temperature are detachably fixed
There is coil ceiling temperature switch, the electric machine casing annular on the outside of end turn is fixed with heating tape,
The wet sensitive probe passes through Vibration induction module and electricity by wet sensitive induction module and heating band connection, vibration probe
In machine control cabinet control motor start and stop start stop switch connection, left bearing limiting temperature switch by left bearing temperature relay with
The start stop switch connection of motor start-stop is controlled in motor controlling cabinet, right bearing limiting temperature is switched by there is bearing temperature relay
It is connect with the start stop switch for controlling motor start and stop in motor controlling cabinet, left bearing ceiling temperature switch, right bearing ceiling temperature are opened
It closes, coil ceiling temperature switch, the signal output end of wet sensitive induction module, the signal output end of water droplet induction module, vibratory sensation
Answer the signal output end of the signal output end of module, the signal output end of left bearing temperature relay and right bearing temperature relay
It is connect with eight road input terminals of tetra- tunnel eight way switch amount APP of the FY-GPRS-KL output remote alarm switch in control cabinet, FY-
Remote controllers, eight way switch of FY-GPRS-KL are provided in tetra- tunnel eight way switch amount APP of GPRS-KL output remote alarm switch
It is long-range by communication unit and background management system and motor and mobile phone terminal APP realization to measure tetra- tunnel APP output remote alarm switch
Signal transmission incudes mould with left bearing ceiling temperature switch, right bearing ceiling temperature switch, coil ceiling temperature switch and water droplet
Four road output ends of block corresponding tetra- tunnel eight way switch amount APP of FY-GPRS-KL output remote alarm switch respectively with motor control
The start stop switch connection of control motor start and stop in cabinet.
Specifically, tetra- tunnel eight way switch amount APP of the FY-GPRS-KL output remote alarm switch is connected with data storage
Unit.
Specifically, the wet sensitive probe is located at the intracorporal upper end of motor casing, water droplet probe is located at the intracorporal lower end of motor casing.
Specifically, the temperature sensor of the left bearing ceiling temperature switch and right bearing ceiling temperature inductive switch is greater than 80
Degree.
Specifically, the temperature sensor of the left bearing limiting temperature switch and right bearing limiting temperature switch is greater than 120 degree.
Specifically, the temperature sensor of the coil ceiling temperature switch is greater than 115 degree.
Compared with prior art, the utility model has the following beneficial effects:
The utility model has automatic monitoring defencive function, can each position operation conditions of real-time monitoring motor, and superior
Control unit Real-time Feedback, can effectively avoid all kinds of hidden danger because that cannot find to occur in motor operation course in time and therefore
Barrier, and cause motor damage and burn.When failure occurs, event can promptly and accurately and be rapidly handled according to specific alarm position
Barrier eliminates the time that maintenance personal searches the specific abort situation of motor, reduces unnecessary trouble, be conducive to quickly repair
Motor.Downtime is reduced, production efficiency is improved, is done one's bit for crude oil increase.Computerized monitor system and cell phone application can be passed through
Software carries out remote real-time monitoring to the operating condition of the utility model large-size machine, ensure that the safe and effective steady of motor
Operation.
Detailed description of the invention
Fig. 1 is to be used novel structural schematic diagram.
Fig. 2 is the logic diagram of the utility model.
Fig. 3 is Tthe utility model system overall structure diagram.
Specific embodiment
As shown in Figure 1, a kind of motor multifunctional intelligent remote monitoring that is applied to protects system, including it is detachably secured to electricity
Wet sensitive probe 3, vibration probe 2 and water droplet probe 4 in casing body 1, are detachably fixed thoughts on the bearing holder (housing, cover) 6 of motor left end cap
The left bearing ceiling temperature switch 7 and left bearing limiting temperature switch 8 of left bearing temperature are answered, on the bearing holder (housing, cover) 6 of motor right end cap
It is removably fixed with the right bearing ceiling temperature switch 9 and right bearing limiting temperature switch 10 of induction right bearing temperature, motor is fixed
The end turn of son 11 is removably fixed with coil ceiling temperature switch 5, and 1 annular of electric machine casing on the outside of end turn is fixed
There is heating tape 13, the wet sensitive probe 3 is located at the upper end in electric machine casing 1, and water droplet probe 4 is located at the lower end in electric machine casing 1.
As shown in Fig. 2, wet sensitive probe 3 is connect by wet sensitive induction module with heating tape 13, vibration probe 2 passes through vibratory sensation
Module is answered to connect with the start stop switch for controlling motor start and stop in motor controlling cabinet, left bearing limiting temperature switch 8 passes through left bearing
Temperature relay is connect with the start stop switch for controlling motor start-stop in motor controlling cabinet, and right bearing limiting temperature switch 10 is by having
Bearing temperature relay is connect with the start stop switch for controlling motor start and stop in motor controlling cabinet, left bearing ceiling temperature switch 7, the right side
Bearing ceiling temperature switch 9, coil ceiling temperature switch 5, the signal output end of wet sensitive induction module, water droplet induction module letter
Number output end, the signal output end of Vibration induction module, the signal output end of left bearing temperature relay and right bearing temperature after
The signal output end of electric appliance exports the eight of remote alarm switch with tetra- tunnel eight way switch amount APP of FY-GPRS-KL in control cabinet
The connection of road input terminal, tetra- tunnel eight way switch amount APP of FY-GPRS-KL export in remote alarm switch and are provided with remote controllers,
Tetra- tunnel eight way switch amount APP of FY-GPRS-KL export remote alarm switch by communication unit and background management system and motor and
Mobile phone terminal APP realizes remote signal transmission, tetra- tunnel eight way switch amount APP of the FY-GPRS-KL output remote alarm switch connection
There is data storage element.With left bearing ceiling temperature switch 7, right bearing ceiling temperature switch 9, coil ceiling temperature switch 5 and
The four road output ends difference of corresponding tetra- tunnel eight way switch amount APP of the FY-GPRS-KL output remote alarm switch of water droplet induction module
It is connect with the start stop switch for controlling motor start and stop in motor controlling cabinet.
9 temperature sensors of the left bearing ceiling temperature switch 7 and right bearing ceiling temperature inductive switch are greater than 80 degree.Institute
The temperature sensor for stating left bearing limiting temperature switch 8 and right bearing limiting temperature switch 10 is greater than 120 degree.The coil upper limit temperature
The temperature sensor for spending switch 5 is greater than 115 degree.
When motor works, left bearing ceiling temperature switch 7 and right bearing ceiling temperature switch 9 monitor motor Y-axis in real time
The temperature variations held, when left bearing ceiling temperature switch 7 reaches left bearing temperature upper limit (80 degree) value, the left bearing upper limit
Temperature switch 7 is connected, and remote controllers make fault pre-alarming and determine and issue left bearing ceiling temperature height to background management system
Alarm message information, and short message is received by Computerized monitor system and cell phone application software, maintenance personal is according to short message
Filling butter operation is carried out to left bearing, the service life of left bearing had both been extended in this way, and will not have been burnt because of left bearing oil starvation,
Cost is saved.
When right bearing ceiling temperature switch 9 reaches the bearing temperature upper limit (80 degree) value, right bearing ceiling temperature switch 9 is connect
Logical, same remote controllers make fault pre-alarming judgement, and short to background management system sending right bearing ceiling temperature height alarm
Letter information, and Computerized monitor system and cell phone application software is made to receive short message, maintenance personal is according to short message to right bearing
Carry out filling butter operation, both extended the service life of right bearing in this way, will not have been burnt because of right bearing oil starvation, saved at
This.
When motor works, left bearing limiting temperature switch 8 and right bearing limiting temperature switch 10 also monitor a motor left side in real time
The temperature variations of right bearing, when left bearing limiting temperature switch 8 reaches left bearing temperature extremes (120 degree), left axle
The connection of limiting temperature switch 8 is held, left bearing temperature relay is made to work, one way switch of left bearing temperature relay is to long-range control
Device makes fault pre-alarming judgement, and issues the high alarm message information of left bearing limiting temperature, back-stage management to background management system
System makes Computerized monitor system and cell phone application software receives short message, while another way switch of left bearing temperature relay (string
The stop button being coupled in motor controlling cabinet) it stops working to motor controlling cabinet, leave the motor off operation, while maintenance personal's root
Left bearing is replaced according to short message, protection motor will not cause rotor to wear or block up because of burning for left bearing
Turn, protects motor in this way, saved cost
When right bearing limiting temperature switch 10 reaches right bearing temperature extremes (120 degree), right bearing limiting temperature is opened
It closes 10 to connect, right bearing temperature relay is made to work, one way switch of right bearing temperature relay is out of order to remote controllers
Early warning determine, and to background management system issue the high alarm message information of right bearing limiting temperature, and make Computerized monitor system and
Cell phone application software receives short message, at the same another way switch of right bearing temperature relay (be series at the stopping of motor controlling cabinet by
Button) motor is stopped working, while maintenance personal replaces right bearing according to short message, and protection motor will not be because of
Burning for right bearing and cause rotor wear or stall, protect motor in this way, saved cost.
When motor works, electrical-coil ceiling temperature switch 5 monitors the temperature variations of coil in real time, when due to motor
In the process of running, it when there is overcurrent, undercurrent, disconnected phase, stall, short circuit, over-voltage, under-voltage, three-phase imbalance, winding aging, sends out
Generator turn-to-turn short circuit can make coil generate heat rapidly, further damage the insulation of adjacent wires, increase the number of turns of short circuit constantly
When more, failure propagation coil current increases, coil can occur partially or fully to generate heat, and coil ceiling temperature switch 5 reaches
When to temperature upper limit (115 degree), coil ceiling temperature switch 5 is connected, and remote controllers make fault alarm, and manage to backstage
Reason system issues the excessively high alarm message information of coil temperature, and Computerized monitor system and cell phone application software is made to receive short message, together
When remote controllers (relay switch is series at stop button in motor controlling cabinet) motor control control cabinet stop working, electricity
Machine stops working.Maintenance personal goes to processing according to short message.Only when the excessively high reason of coil temperature (undercurrent, break by overcurrent
Phase, stall, turn-to-turn short circuit, phase fault, over-voltage, under-voltage, three-phase imbalance, winding aging) thoroughly solve after, motor will not be because
Temperature continues to increase and burn.The service life for extending motor, improves work efficiency, and has saved cost.
When motor works, wet sensitive probe 3 monitors the humidity situation of change in motor in real time, in the case where not having moist operating condition,
3 resistance that is presented of wet sensitive probe be it is infinitely great, since the temperature difference at daytime and night is big, visited when being installed on wet sensitive inside motor
First 3, when detecting the moisture adsorption inside motor inside motor and on humidity-sensitive film, wet sensitive probe 3 experience due to moisture and
When generated resistance, the relay switch of wet sensitive induction module is acted, and the relay switch of wet sensitive induction module is given far all the way
Range controller makes fault pre-alarming judgement, and issues wetly alarm message information inside motor to background management system, and make
Computerized monitor system and cell phone application software receive short message, while the relay switch another way starting of wet sensitive induction module adds
The torrid zone, heating tape work increase the internal temperature of motor, and for the water mist in motor by high temperature evaporation, wet sensitive 3 resistance of probe are infinite
When big, wet sensitive induction module relay switch stops working, and heating tape also stops working, and does not have droplet shape inside such motor
At, and the coil short of motor is burnt, motor is protected, the service life of motor is extended, has saved cost.
When occurring under the inclement weather conditions such as violent storm, when motor is intake, in 4 monitoring motors of motor water droplet probe
Water inlet, when droplet is adsorbed on humidity-sensitive film, water droplet probe 4 is when experiencing the resistance due to caused by droplet, water droplet probe 4
Signal, which is amplified, acts the relay switch of water droplet induction module, and the relay switch of water droplet induction module gives long-range control all the way
Device processed makes fault pre-alarming judgement, and issues water droplet induction module alarm message information to background management system, and supervise computer
Control system and cell phone application software receive short message, while the relay switch another way of water droplet induction module (is series at motor control
Stop button in cabinet processed) stop working to motor controlling cabinet, leave the motor off operation, maintenance personal according to short message as early as possible
Go to processing.To protect motor the coil short of motor will not be made to burn because of water inlet.The service life of motor is extended,
Cost is saved.
Motor vibration probe 2, monitor the vibration situation of change of motor in real time, due to motor in use, can
It can occur to shake caused by due to loosened screw or belt aging are broken, when this happens, the signal quilt of vibration probe 2
Amplification acts the relay switch of shock sensor module, and the relay switch of Vibration induction module gives remote controllers all the way
Fault pre-alarming judgement is made, and issues Vibration induction module relay switch alarm short message to background management system, and make
Computerized monitor system and cell phone application software receive short message, while the relay switch another way of Vibration induction module (is series at
Stop button in motor controlling cabinet) it stops working to motor controlling cabinet, operation is left the motor off, maintenance personal believes according to short message
In-situ processing is gone in prompt as early as possible, tightens the screw or replace belt, and motor other equipment is avoided to damage, and causes bigger damage
It loses.
For motor when outlying area is commonly encountered exceedingly odious weather and heavy rain incessanly, operator not can enter motor
It, at this moment can be intelligently remote by motor multifunctional by Computerized monitor system and cell phone application software systems around control cabinet
Range monitoring protection internal system start and stop relay switch (starting relay be parallel to starting in motor controlling cabinet by
Button, slew relay switch the stop button being series in motor controlling cabinet), directly motor controlling cabinet is allowed to stop working, motor
Out of service, remote protecting motor makes the national wealth not suffer a loss.The safety of maintenance personal is improved simultaneously.Equally exist
In the normal situation of power system recovery, operator on duty can pass through electricity by Computerized monitor system and cell phone application software systems
The long-range monitor protective system of machine multifunctional intellectual remotely starts motor and restores to work normally.
Left bearing ceiling temperature switch 7 in motor, right bearing ceiling temperature switch 9, left bearing pole under special circumstances
Temperature switch 8, right bearing limiting temperature switch 10, coil ceiling temperature switch 5, vibration probe 2, wet sensitive probe 3, water droplet is limited to visit
First 4, system can be protected to connect with motor multifunctional intelligent remote monitoring by remote control mode, equally reach the work of protection motor
With.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (6)
1. one kind, which is applied to motor multifunctional intelligent remote monitoring, protects system, which is characterized in that including being detachably secured to electricity
Wet sensitive probe (3), vibration probe (2) and water droplet in casing body (1) are popped one's head in (4), removable on the bearing holder (housing, cover) (6) of motor left end cap
Unload the left bearing ceiling temperature switch (7) and left bearing limiting temperature switch (8) for being fixed with induction left bearing temperature, motor right end
The right bearing ceiling temperature switch (9) and the right bearing limit of induction right bearing temperature are removably fixed on the bearing holder (housing, cover) (6) of lid
Temperature switch (10), the end turn of motor stator (11) are removably fixed with coil ceiling temperature and switch (5), outside end turn
Electric machine casing (1) annular of side is fixed with heating tape (13),
The wet sensitive probe (3) is connect by wet sensitive induction module with heating tape (13), and vibration probe (2) passes through Vibration induction mould
Block is connect with the start stop switch for controlling motor start and stop in motor controlling cabinet, and left bearing limiting temperature switch (8) passes through left bearing temperature
Degree relay is connect with the start stop switch for controlling motor start-stop in motor controlling cabinet, and right bearing limiting temperature switch (10) is by having
Bearing temperature relay is connect with the start stop switch for controlling motor start and stop in motor controlling cabinet, left bearing ceiling temperature switch (7),
Right bearing ceiling temperature switchs (9), coil ceiling temperature switch (5), the signal output end of wet sensitive induction module, water droplet induction mould
The signal output end of block, the signal output end of Vibration induction module, left bearing temperature relay signal output end and right bearing
The signal output end of temperature relay is opened with tetra- tunnel eight way switch amount APP of the FY-GPRS-KL output remote alarms in control cabinet
The connection of eight road input terminal of Guan, tetra- tunnel eight way switch amount APP of FY-GPRS-KL export in remote alarm switch and are provided with long-range control
Device processed, tetra- tunnel eight way switch amount APP of FY-GPRS-KL export remote alarm switch by communication unit and background management system with
Motor and mobile phone terminal APP realize remote signal transmission, switch with left bearing ceiling temperature switch (7), right bearing ceiling temperature
(9), coil ceiling temperature switch (5) and corresponding tetra- tunnel eight way switch amount APP of the FY-GPRS-KL output of water droplet induction module are remote
Four road output ends of journey alarm switch are connect with the start stop switch for controlling motor start and stop in motor controlling cabinet respectively.
2. a kind of motor multifunctional intelligent remote monitoring that is applied to protects system according to claim 1, which is characterized in that institute
It states tetra- tunnel eight way switch amount APP of FY-GPRS-KL output remote alarm switch and is connected with data storage element.
3. a kind of motor multifunctional intelligent remote monitoring that is applied to protects system according to claim 1, which is characterized in that institute
The upper end that wet sensitive probe (3) is located in electric machine casing (1) is stated, water droplet probe (4) is located at the lower end in electric machine casing (1).
4. a kind of motor multifunctional intelligent remote monitoring that is applied to protects system according to claim 1, which is characterized in that institute
(9) temperature sensor for stating left bearing ceiling temperature switch (7) and right bearing ceiling temperature inductive switch is greater than 80 degree.
5. a kind of motor multifunctional intelligent remote monitoring that is applied to protects system according to claim 1, which is characterized in that institute
The temperature sensor for stating left bearing limiting temperature switch (8) and right bearing limiting temperature switch (10) is greater than 120 degree.
6. a kind of motor multifunctional intelligent remote monitoring that is applied to protects system according to claim 1, which is characterized in that institute
The temperature sensor for stating coil ceiling temperature switch (5) is greater than 115 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920486008.1U CN209448412U (en) | 2019-04-11 | 2019-04-11 | One kind being applied to motor multifunctional intelligent remote monitoring and protects system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920486008.1U CN209448412U (en) | 2019-04-11 | 2019-04-11 | One kind being applied to motor multifunctional intelligent remote monitoring and protects system |
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| Publication Number | Publication Date |
|---|---|
| CN209448412U true CN209448412U (en) | 2019-09-27 |
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ID=68034546
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920486008.1U Active CN209448412U (en) | 2019-04-11 | 2019-04-11 | One kind being applied to motor multifunctional intelligent remote monitoring and protects system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111006718A (en) * | 2019-12-10 | 2020-04-14 | 安徽银河物联通信技术有限公司 | Intelligent motor monitoring system and method |
| CN112582063A (en) * | 2019-09-30 | 2021-03-30 | 长沙昱旻信息科技有限公司 | BMI prediction method, device, system, computer storage medium, and electronic apparatus |
| CN115220507A (en) * | 2022-09-21 | 2022-10-21 | 山西万家寨水控水利机电科技服务有限公司 | Novel integrated motor with leakage protection device |
-
2019
- 2019-04-11 CN CN201920486008.1U patent/CN209448412U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112582063A (en) * | 2019-09-30 | 2021-03-30 | 长沙昱旻信息科技有限公司 | BMI prediction method, device, system, computer storage medium, and electronic apparatus |
| CN111006718A (en) * | 2019-12-10 | 2020-04-14 | 安徽银河物联通信技术有限公司 | Intelligent motor monitoring system and method |
| CN115220507A (en) * | 2022-09-21 | 2022-10-21 | 山西万家寨水控水利机电科技服务有限公司 | Novel integrated motor with leakage protection device |
| CN115220507B (en) * | 2022-09-21 | 2022-12-16 | 山西万家寨水控水利机电科技服务有限公司 | Novel integrated motor with leakage protection device |
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