CN206753882U - Industrial water pump control loop system - Google Patents
Industrial water pump control loop system Download PDFInfo
- Publication number
- CN206753882U CN206753882U CN201720400891.9U CN201720400891U CN206753882U CN 206753882 U CN206753882 U CN 206753882U CN 201720400891 U CN201720400891 U CN 201720400891U CN 206753882 U CN206753882 U CN 206753882U
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- China
- Prior art keywords
- water pump
- switch
- industrial water
- frequency
- pump motor
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- 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.)
- Expired - Fee Related
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- Control Of Positive-Displacement Pumps (AREA)
Abstract
The utility model proposes a kind of industrial water pump control loop system, including：Industrial water pump switch input terminal in first switch cabinet is connected to the second bus, industrial water pump output switching terminal is connected to frequency converter, the output end of frequency converter is connected to the input of variable frequency pump motor, the input of second control power supply is connected to industrial water pump switch, the output end of second control power supply is connected to the input of VFC module, and the output end of VFC module is connected to PLC control modules；Industrial water pump switch and the first A.C. contactor in second switch cabinet are series between the first bus and the first main frequency water pump motor, backup circuit breaker input is connected to the first bus, the input of first control power supply is connected to backup circuit breaker output end, the output end of first control power supply is connected to the input of VFC module, and the output end of VFC module is connected to PLC control modules.The utility model has the characteristics of security performance is high, radiating efficiency is high, energy-conservation.
Description
Technical field
Industrial water pump technical field is the utility model is related to, more particularly to a kind of industrial water pump control loop system.
Background technology
At present, the working method of variable frequency pump and main frequency water pump is in industrial water pump：PLC is automatically controlled：First, frequency conversion
Pump startup is run；When flow increases, when ductwork pressure is less than lower limit value, main frequency water pump parallel running is opened in PLC delays, if pipe
When net pressure is also less than lower limit value, another main frequency water pump parallel running is opened in PLC delays.Reach when pipe network flow reduces frequency
When setting lower limit, PLC, which can be delayed, stops main frequency water pump, and when pipe network flow, which also reduces frequency, reaches setting lower limit, PLC, which can be delayed, to stop
Another main frequency water pump, if frequency converter failure meeting all pumps of full cut-off now occur, wait failture evacuation just to restart, cause nothing
Industrial water supply.
In the prior art, for main frequency water pump using star angle Starting mode, every main frequency water pump connects 6 contactors on the spot,
During normal work, main frequency water pump can frequent start-stop, cause 6 contactor frequent switchings, contactor easily burns.
In addition, the adjacent frequency converter installation of PLC device in PLC control cabinet, is unfavorable for frequency converter radiating；During summer high temperature, lead
The frequent excess temperature tripping operation of frequency converter is caused, while cabinet internal wiring is more, space for maintenance is narrow, is brought to maintainer's defect processing very big
It is difficult.
Wherein, power supply is only controlled all the way in industrial water pump control loop, be derived from the power switch of variable frequency pump, once variable frequency pump
Power switch is tripped, and main frequency water pump will be caused to be stopped, whole control loop systemic breakdown, cause very big loss, and bring
Inconvenience.Also, the only single protection of thermocouple relay in existing industrial water pump control loop, Judging fault and excision failure
Time is grown, it is possible to causes failure propagation, shortens the service life of motor and frequency converter.
In addition, existing PLC control cabinet is typically mounted at below 0 meter of pump house, surrounding is entirely industrial waterpipe, in the rainy day
Or during pump house interior conduit leak, cabinet is easily intake, the also safe operation to industry water brings very big hidden danger.
Utility model content
The purpose of this utility model is intended at least solve one of described technological deficiency.
Therefore, the purpose of this utility model is to propose a kind of industrial water pump control loop system, industrial water pump control
Circuit system has the characteristics of security performance is high, radiating efficiency is high, energy-conservation.
To achieve these goals, the embodiment of the utility model one side provides a kind of industrial water pump control loop system
System, including：Variable frequency pump motor, the first main frequency water pump motor, the second main frequency water pump motor, first switch cabinet, second switch cabinet,
3rd switch cubicle, the first bus, the second bus, the first control power supply, the second control power supply, PLC control cabinet, wherein, the PLC
Switch board includes：Frequency converter, PLC control modules,
The first switch cabinet includes industrial water pump switch, VFC module, and the three-phase of the industrial water pump switch is defeated
Enter three phase lines that end is respectively connecting to second bus, the three-phase output end of the industrial water pump switch is respectively connecting to institute
State the three-phase input end of frequency converter, the three-phase that the three-phase output end of the frequency converter is respectively connecting to the variable frequency pump motor is defeated
Enter end, the input of the second control power supply is connected to a wherein phase line for the industrial water pump switch, second control
The output end of power supply processed is connected to the input of the VFC module, and the output end of the VFC module is connected to institute
State PLC control modules；
The second switch cabinet includes industrial water pump switch, the VFC module, the first A.C. contactor, standby
With switch, the industrial water pump switch is sequentially connected in series in first bus and first work with first A.C. contactor
Between frequency pump motor, the three-phase input end of the backup circuit breaker is connected to the first bus, the input of the first control power supply
End is connected to the three-phase output end of the backup circuit breaker, and the output end of the first control power supply is connected to the VFC mould
The input of block, the output end of the VFC module are connected to the PLC control modules；
3rd switch cubicle includes industrial water pump switch, the second A.C. contactor, industrial water pump switch with
Second A.C. contactor is sequentially connected in series between second bus and the second main frequency water pump motor.
Further, the first control power supply and the second control power supply composition interlock, wherein, first control
System
Power supply includes the first control power switch, two the first relays, the first relay coils, the second control electricity
Source
Power switch, two the second relays, the second relay coils are controlled including second,
The first control power switch and one of them first relay are series at the backup circuit breaker and the frequency conversion
Between control module, the second control power switch and one of them second relay are sequentially connected in series and opened in the main frequency water pump
Close between the VFC module, the series circuit of another second relay and the second relay coil composition is connected in parallel on
The series circuit of the input of the first control power switch, another first relay and the first relay coil composition is simultaneously
It is associated in the input of the second control power switch.
Further, the VFC module includes selecting switch, frequency conversion emergency light, water source signal lamp, power frequency water
Pump motor frequency variation signal lamp, the selecting switch are used to select manual, automatic and stopped, the frequency conversion emergency light, water source
Signal lamp, main frequency water pump motor frequency conversion signal lamp are in parallel, for indicating whether frequency converter work is normal.
Further, the second switch cabinet also includes the secondary connection circuit of the first main frequency water pump motor, and the described 3rd opens
Closing cabinet also includes the secondary connection circuit of the second main frequency water pump motor, the secondary connection circuit of the first main frequency water pump motor
Three-phase input end is connected to 220V three-phase electricities, the three-phase output end connection of the secondary connection circuit of the first main frequency water pump motor
To the PLC control modules, the connection of the secondary connection circuit of the second main frequency water pump motor is the same as first main frequency water pump
The secondary connection circuit of motor.
Further, protection circuit, the protection are equipped with the first switch cabinet, second switch cabinet, the 3rd switch cubicle
Circuit on one side connects the variable frequency pump motor, the first main frequency water pump motor, the second main frequency water pump motor, other end connection respectively
The PLC control modules.
Further, the protection circuit comprises at least overheating protection circuit, Lock protective circuit, ground protection circuit.
Further, the PLC control modules are installed with the frequency converter interval.
Further, the PLC control modules are fixed in the PLC control cabinet with the frequency converter using punching channel-section steel.
Further, the PLC control cabinet and the first switch cabinet, second switch cabinet, the 3rd switch cubicle are separately mounted to
In the switchgear house of pump house.
The utility model compared with prior art, has the beneficial effect that：
1st, the first main frequency water pump motor of the present utility model and the second main frequency water pump motor with industrial water pump respectively by opening
Connected between pass the first A.C. contactor and the second A.C. contactor, realize and individually directly initiate, it is therefore prevented that in the prior art
Contactor often burns caused by the Starting mode of star angle, greatlys save cost, and if frequency converter breaks down, as long as
Individually stop variable frequency pump motor, the first main frequency water pump motor and the second main frequency water pump motor still can be with normal operations.
2nd, the utility model includes the first control power supply, the second control power supply, the first control power supply and the second control power supply
Interlock is formed, if the first control power failure, the second control power supply automatic start, realize dual power supply and cut automatically
Change.
3rd, protection circuit is equipped with first switch cabinet of the present utility model, second switch cabinet, the 3rd switch cubicle, carried significantly
Timely discriminating power during high failure, quick excision fault time is shortened, the service life of each motor is extended, reduces
The possibility of failure propagation.
4th, in the switchgear house of the pump house of PLC control cabinet installation of the present utility model on the ground, it is therefore prevented that prior art
The drawbacks of middle underground installation.
5th, PLC control modules of the present utility model and the installation of frequency converter interval, the radiating efficiency of frequency converter is improved.
The additional aspect of the utility model and advantage will be set forth in part in the description, partly by from following description
In become obvious, or by it is of the present utility model practice recognize.
Brief description of the drawings
Of the present utility model above-mentioned and/or additional aspect and advantage will in the description from combination accompanying drawings below to embodiment
Become obvious and be readily appreciated that, wherein：
Fig. 1 is the structure chart of industrial water pump control loop system of the present utility model；
Fig. 2-1 is the major loop electric diagram of industrial water pump control loop system of the present utility model；
Fig. 2-2 is the major loop electric diagram of industrial water pump control loop system of the present utility model；
Fig. 3 is that the two-way of industrial water pump control loop system of the present utility model controls the electric diagram of power supply；
Fig. 4 is the electric diagram of the VFC module of industrial water pump control loop system of the present utility model；
Fig. 5 is the schematic diagram of the PLC control modules of industrial water pump control loop system of the present utility model；
Fig. 6-1 is the first main frequency water pump motor and the second power frequency water of industrial water pump control loop system of the present utility model
The electric diagram of the secondary connection circuit of pump motor；
Fig. 6-2 is the first main frequency water pump motor and the second power frequency water of industrial water pump control loop system of the present utility model
The electric diagram of the secondary connection circuit of pump motor；
Fig. 7 is that a kind of installation of embodiment of the PLC control cabinet of industrial water pump control loop system of the present utility model is shown
It is intended to.
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model
Limitation.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning in the utility model.
As shown in Figure 1 and Figure 2, a kind of industrial water pump control loop system of the utility model embodiment, including：Frequency conversion water
Pump motor M1, the first main frequency water pump motor M2, the second main frequency water pump motor M3, first switch cabinet 1, second switch cabinet the 2, the 3rd are opened
Close cabinet 3, the first bus A, the second bus B, the first control power supply 4, second and control power supply 5, PLC control cabinet 8, wherein, PLC controls
Cabinet 8 includes：Frequency converter 7, PLC control modules 6,
First switch cabinet 1 includes industrial water pump switch Q1, VFC module 9, and industrial water pump switchs Q1 three-phase input
End is respectively connecting to the second bus B three phase line A phase, B phase, C phases, and industrial water pump switch Q1 three-phase output end connects respectively
To the three-phase input end of frequency converter 7, the three-phase output end of frequency converter 7 is respectively connecting to variable frequency pump motor M1 three-phase input end
U phases, V phases, W phases, the input of the second control power supply 5 are connected to an industrial water pump switch Q1 wherein phase line, the second control
The output end of power supply 5 is connected to the input of VFC module 9, and the output end of VFC module 9 is connected to PLC control moulds
Block 6, the schematic diagram of PLC control modules 6 are as shown in Figure 5.
Second switch cabinet 2 includes industrial water pump switch Q1, VFC module 9, the first A.C. contactor Q2, backup circuit breaker
YOBHN0601, industrial water pump switch Q1 and the first A.C. contactor Q2 are sequentially connected in series in the first bus A and the first main frequency water pump electricity
Between machine M2, backup circuit breaker YOBHN0601 three-phase input end is connected to the first bus A, and the input of the first control power supply 4 connects
Backup circuit breaker YOBHN0601 three-phase output end is connected to, the output end of the first control power supply 4 is connected to VFC module 9
Input, the output end of VFC module 9 are connected to PLC control modules 6.
As shown in figure 3, the first control power supply 4 and second controls power supply 5 to form interlock, wherein, the first control power supply
4 include the first control power switch QF1, two the first relay K12, the first relay coil K12, the second control
Power supply 5 processed includes the second control power switch QF2, two the second relay K21, the second relay coil K21,
First control power switch QF1 and one of them first relay k12 is series at backup circuit breaker YOBHN0601 and change
Between frequency control module 31, the second control power switch QF2 and one of them second relay K21 is sequentially connected in series in main frequency water pump
Switch between Q1 and VFC module 11, the series electrical of another the second relay K21 and the second relay coil K21 compositions
Road is connected in parallel on the first control power switch QF1 input, another the first relay block K12 and the first relay coil K12
The series circuit of composition is connected in parallel on the second control power switch QF2 input.If the first control failure of power supply 4, second
The automatic start of power supply 5 is controlled, realizes Dual-power automatic switching, is avoided because control power loss causes three water pump electricity all the way
The all non-serviceable operating mode of machine.
As shown in fig. 6, second switch cabinet 2 also includes the first main frequency water pump motor M2 secondary connection circuit, the first power frequency
The three-phase input end of pump motor M2 secondary connection circuit is connected to 220V three-phase electricities, and the first main frequency water pump motor M2's is secondary
The three-phase output end of connection circuit is connected to PLC control modules 6.
3rd switch cubicle 3 includes industrial water pump switch Q1, the second A.C. contactor Q3, and industrial water pump switch Q1 and second is handed over
Stream contactor Q3 is sequentially connected in series between the second bus B and the second main frequency water pump motor M3.As shown in fig. 6, the 3rd switch cubicle 3 is also
Include the second main frequency water pump motor M3 secondary connection circuit, the connection of the second main frequency water pump motor M3 secondary connection circuit is same
First main frequency water pump motor M2 secondary connection circuit.
First main frequency water pump motor M2 and the second main frequency water pump motor M3 between industrial water pump switch Q1 respectively by going here and there
Join the first A.C. contactor Q2 and the second A.C. contactor Q3, realize and individually directly initiate, it is therefore prevented that in the prior art because of star
Contactor caused by the Starting mode of angle often burns, and greatlys save cost, and if frequency converter 7 breaks down, as long as single
Solely stopping variable frequency pump motor M1, the first main frequency water pump motor M2 and the second main frequency water pump motor M2 still can normally transport
OK.
In addition, being equipped with protection circuit in first switch cabinet 1, second switch cabinet 2, the 3rd switch cubicle 3, event is substantially increased
Timely discriminating power during barrier, quick excision fault time is shortened, the service life of each motor is extended, reduces failure expansion
Big possibility.Protection circuit one end connects variable frequency pump motor M1, the first main frequency water pump motor M2, the second main frequency water pump respectively
Motor M3, the other end connection PLC control module 6.Specifically, protection circuit comprises at least overheating protection circuit, rotation-clogging protection electricity
Road, ground protection circuit.
As shown in figure 4, VFC module 9 includes selecting switch, frequency conversion emergency light, water source signal lamp, power frequency water
Pump motor frequency variation signal lamp, selecting switch are used to select manual, automatic and stopped, frequency conversion emergency light, water source signal lamp, work
Frequency pump motor frequency variation signal lamp is in parallel, for indicating that it is whether normal that frequency converter 7 works.
Wherein, PLC control modules 6 are installed with the interval of frequency converter 7, preferably a kind of embodiment, as shown in fig. 7, frequency converter 7
The middle and upper part of PLC control cabinet 8 is installed on, PLC control modules 6 are arranged on the right lower quadrant of PLC control cabinet 8, apart from frequency converter 7 and row
Fan has certain distance, improves the radiating efficiency of frequency converter 7.
Specifically, PLC control modules 6 are fixed in PLC control cabinet 8 with frequency converter 7 using punching channel-section steel.
In addition, PLC control cabinet 8 and first switch cabinet 1, second switch cabinet 2, the 3rd switch cubicle 3 are separately mounted to pump house
Switchgear house in, it is therefore prevented that in the prior art underground install the drawbacks of, such as：PLC caused by pipe leakage or roof leaking rainy days
The water inlet of switch board 8 brings potential safety hazard.
First main frequency water pump motor of the present utility model and the second main frequency water pump motor with industrial water pump respectively by switching
Between connect the first A.C. contactor and the second A.C. contactor, realize and individually directly initiate, it is therefore prevented that in the prior art because
Contactor caused by the Starting mode of star angle often burns, and greatlys save cost, and if frequency converter breaks down, as long as single
Solely stop variable frequency pump motor, the first main frequency water pump motor and the second main frequency water pump motor still can be with normal operations；First
Power supply and the second control power supply composition interlock are controlled, if the first control power failure, the second control power supply opens automatically
It is dynamic, realize Dual-power automatic switching；Protection circuit is equipped with first switch cabinet, second switch cabinet, the 3rd switch cubicle, significantly
Timely discriminating power when improving failure, the service life for shortening quick excision fault time, extending each motor, reduce
The possibility of failure propagation；In the switchgear house of the pump house of PLC control cabinet installation on the ground, it is therefore prevented that in the prior art
The drawbacks of lower installation；PLC control modules and the installation of frequency converter interval, improve the radiating efficiency of frequency converter.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present utility model.In this manual, to the schematic table of above-mentioned term
State and be not necessarily referring to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be
Combined in an appropriate manner in any one or more embodiments or example.
Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is
Exemplary, it is impossible to it is interpreted as not departing from the utility model to limitation of the present utility model, one of ordinary skill in the art
Principle and objective in the case of above-described embodiment can be changed in the scope of the utility model, change, replace and
Modification.The scope of the utility model is by appended claims and its equivalent limits.
Claims (9)
- A kind of 1. industrial water pump control loop system, it is characterised in that including：Variable frequency pump motor, the first main frequency water pump motor, Second main frequency water pump motor, first switch cabinet, second switch cabinet, the 3rd switch cubicle, the first bus, the second bus, the first control Power supply, the second control power supply, PLC control cabinet, wherein, the PLC control cabinet includes：Frequency converter, PLC control modules,The first switch cabinet includes industrial water pump switch, VFC module, the three-phase input end of the industrial water pump switch Three phase lines of second bus are respectively connecting to, the three-phase output end of the industrial water pump switch is respectively connecting to the change The three-phase input end of frequency device, the three-phase output end of the frequency converter are respectively connecting to the three-phase input of the variable frequency pump motor End, the input of the second control power supply are connected to a wherein phase line for the industrial water pump switch, second control The output end of power supply is connected to the input of the VFC module, and the output end of the VFC module is connected to described PLC control modules；The second switch cabinet includes industrial water pump switch, the VFC module, the first A.C. contactor, standby opened Close, the industrial water pump switch is sequentially connected in series in first bus and the first power frequency water with first A.C. contactor Between pump motor, the three-phase input end of the backup circuit breaker is connected to the first bus, and the input of the first control power supply connects The three-phase output end of the backup circuit breaker is connected to, the output end of the first control power supply is connected to the VFC module Input, the output end of the VFC module are connected to the PLC control modules；3rd switch cubicle includes industrial water pump switch, the second A.C. contactor, industrial water pump switch with it is described Second A.C. contactor is sequentially connected in series between second bus and the second main frequency water pump motor.
- 2. industrial water pump control loop system according to claim 1, it is characterised in that the first control power supply and institute State the second control power supply composition interlock, wherein, the first control power supply include the first control power switch, two first Relay, the first relay coil, the second control power supply include the second control power switch, two the second relays, the Two relay coils,The first control power switch and one of them first relay are series at the backup circuit breaker and the VFC Between module, it is described second control power switch and one of them second relay be sequentially connected in series in the main frequency water pump switch and Between the VFC module, the series circuit of another second relay and the second relay coil composition is connected in parallel on described The series circuit of the input of first control power switch, another first relay and the first relay coil composition is connected in parallel on The input of the second control power switch.
- 3. industrial water pump control loop system according to claim 1, it is characterised in that the VFC module includes Selecting switch, frequency conversion emergency light, water source signal lamp, main frequency water pump motor frequency conversion signal lamp, the selecting switch are used to select Select manual, automatic and stop, the frequency conversion emergency light, water source signal lamp, main frequency water pump motor frequency conversion signal lamp are in parallel, use It is whether normal in instruction frequency converter work.
- 4. industrial water pump control loop system according to claim 1, it is characterised in that the second switch cabinet also includes The secondary connection circuit of first main frequency water pump motor, the 3rd switch cubicle also include the secondary connection of the second main frequency water pump motor Circuit, the three-phase input end of the secondary connection circuit of the first main frequency water pump motor are connected to 220V three-phase electricities, and described first The three-phase output end of the secondary connection circuit of main frequency water pump motor is connected to the PLC control modules, second main frequency water pump Secondary connection circuit of the connection of the secondary connection circuit of motor with the first main frequency water pump motor.
- 5. industrial water pump control loop system according to claim 1, it is characterised in that the first switch cabinet, second Protection circuit is equipped with switch cubicle, the 3rd switch cubicle, described protection circuit one end connects the variable frequency pump motor, respectively One main frequency water pump motor, the second main frequency water pump motor, the other end connect the PLC control modules.
- 6. industrial water pump control loop system according to claim 5, it is characterised in that the protection circuit comprises at least Overheating protection circuit, Lock protective circuit, ground protection circuit.
- 7. industrial water pump control loop system according to claim 1, it is characterised in that the PLC control modules and institute State the installation of frequency converter interval.
- 8. industrial water pump control loop system according to claim 7, it is characterised in that the PLC control modules and institute Frequency converter is stated to be fixed in the PLC control cabinet using punching channel-section steel.
- 9. industrial water pump control loop system according to claim 1, it is characterised in that the PLC control cabinet and described First switch cabinet, second switch cabinet, the 3rd switch cubicle are separately mounted in the switchgear house of pump house.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720400891.9U CN206753882U (en) | 2017-04-17 | 2017-04-17 | Industrial water pump control loop system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720400891.9U CN206753882U (en) | 2017-04-17 | 2017-04-17 | Industrial water pump control loop system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206753882U true CN206753882U (en) | 2017-12-15 |
Family
ID=60613047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720400891.9U Expired - Fee Related CN206753882U (en) | 2017-04-17 | 2017-04-17 | Industrial water pump control loop system |
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| Country | Link |
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| CN (1) | CN206753882U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109391176A (en) * | 2018-12-21 | 2019-02-26 | 荣成市固废综合处理与应用产业园有限公司 | A kind of industrial water pump motor work system |
-
2017
- 2017-04-17 CN CN201720400891.9U patent/CN206753882U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109391176A (en) * | 2018-12-21 | 2019-02-26 | 荣成市固废综合处理与应用产业园有限公司 | A kind of industrial water pump motor work system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171215 Termination date: 20200417 |