CN106762875B - A kind of thermal power plant's coal pulverizer hydraulic oil system and its start-up and shut-down control method - Google Patents
A kind of thermal power plant's coal pulverizer hydraulic oil system and its start-up and shut-down control method Download PDFInfo
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- CN106762875B CN106762875B CN201710046185.3A CN201710046185A CN106762875B CN 106762875 B CN106762875 B CN 106762875B CN 201710046185 A CN201710046185 A CN 201710046185A CN 106762875 B CN106762875 B CN 106762875B
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- oil pump
- cooler
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- 239000010720 hydraulic oil Substances 0.000 title claims abstract description 191
- 239000003245 coal Substances 0.000 title claims abstract description 124
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000003921 oil Substances 0.000 claims abstract description 55
- 230000008859 change Effects 0.000 claims abstract description 20
- 230000003993 interaction Effects 0.000 claims abstract description 9
- 238000000227 grinding Methods 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 8
- 238000012790 confirmation Methods 0.000 claims description 4
- 235000013399 edible fruits Nutrition 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 9
- 238000004590 computer program Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20576—Systems with pumps with multiple pumps
Abstract
The present invention provides a kind of thermal power plant's coal pulverizer hydraulic oil system and its start-up and shut-down control method, which includes：Hydraulic oil container, two accumulators, two coolers, hydraulic cylinder, switching solenoid valve, becomes load ratio spill valve, loads spill valve, ratio spill valve and a plurality of pipeline surely two hydraulic oil pumps；Two hydraulic oil pumps are arranged in the hydraulic oil container, are equipped with outlet non-return valve in the exit of two hydraulic oil pumps；Hydraulic oil pump is separately connected positive interaction room and reaction room by two-way oil supply pipe；Two accumulators are separately positioned on two oil supply pipes, are equipped with delivery valve in accumulator entrance, exit is equipped with pressure maintaining valve；Switching solenoid valve, change load ratio spill valve, load spill valve is arranged on the oil returning tube between hydraulic oil pump and positive interaction room surely, becomes load ratio spill valve for switching and loads spill valve surely；Ratio spill valve is arranged on the oil returning tube between hydraulic oil pump and reaction room；Two oil returning tubes are connected with hydraulic tank after converging through cooler.
Description
Technical field
The present invention relates to thermal power generating technology field more particularly to a kind of thermal power plant's coal pulverizer hydraulic oil system and its start and stop
Control method.
Background technique
The existing coal pulverizer hydraulic oil system of thermal power plant mainly by motor, gear pump, ratio spill valve, overflow valve, change
To valve, multiple hydraulic cylinders, flow control valve, check valve, cooler, filter, pressure transmitter etc. and oil cylinder accumulator group
Deng composition.Each hydraulic cylinder pulls stiffness-strengthened story by pull rod respectively, and the coal of feeder outlet is fallen in by central coal conduit
On intermediate mill, the grinding roller being connected on loading frame applies pressure to the coal seam on mill, and coal pulverizer hydraulic oil is to become load system
System, the hydraulic grinding forces of this system be it is adjustable, can be adjusted to corresponding best grinding forces under different operating conditions, pass through change
The input of proportional pressure control valve electric signal is adjusted, and when coal quality changes or meets quick variation, grinding forces can be fast
Velocity modulation section, hydraulic loaded coal pulverizer have better service condition.But existing thermal power plant is in coal pulverizer hydraulic oil system full cut-off
Under state, the automatic starting of coal pulverizer hydraulic oil system cannot achieve, it also can not be under coal pulverizer hydraulic oil system operating status
Realize that coal pulverizer hydraulic oil system is automatically stopped, and when coal pulverizer hydraulic oil system startup program is run to a certain step,
If the step sequence condition is unsatisfactory for, the operation of startup program can not be continued.That is, the operation and stopping of existing coal pulverizer hydraulic oil system
It is required to human intervention, this considerably increases workloads and human cost, and if cannot start or stop in time coal pulverizer
Hydraulic oil system then will affect unit normal operation.
Summary of the invention
In order to solve the above technical problems, the embodiment of the invention provides a kind of thermal power plant's coal pulverizer hydraulic oil system and its opening
Stop control method.
One aspect of the present invention provides a kind of thermal power plant's coal pulverizer hydraulic oil system, thermal power plant's coal pulverizer hydraulic oil system
System includes：Hydraulic oil container, the first hydraulic oil pump, the second hydraulic oil pump, the first accumulator, the second accumulator, the first cooler,
Two coolers, switching solenoid valve, become load ratio spill valve, load spill valve, ratio spill valve and a plurality of pipe surely hydraulic cylinder
Road；
First hydraulic oil pump and the second hydraulic oil pump are arranged in the hydraulic oil container, in going out for two hydraulic oil pumps
It is respectively equipped with hydraulic oil pump outlet non-return valve at mouthful, is equipped with contact pipeline in the oil outlet of the outlet non-return valve；Described first
Hydraulic oil pump is separately connected the positive interaction room and reaction room of the hydraulic cylinder by two-way oil supply pipe, and the hydraulic cylinder passes through
The grinding roller of connecting rod connection coal pulverizer；First accumulator and the second accumulator are separately positioned on two-way oil supply pipe, in institute
The inlet for stating the first accumulator and the second accumulator is respectively equipped with delivery valve, first accumulator and the second accumulator it is logical
A pressure maintaining valve is respectively equipped with to the exit of oil returning tube；
The switching solenoid valve, become load ratio spill valve, surely load spill valve setting first hydraulic oil pump with
On the first oil returning tube between hydraulic cylinder positive interaction room, the switching solenoid valve is for switching the change load ratio spill valve
And spill valve is loaded surely；Second between first hydraulic oil pump and hydraulic cylinder reaction room is arranged in the ratio spill valve
On oil returning tube；After first oil returning tube and the second oil returning tube converge, first cooler through being connected in parallel,
Two coolers are connect with the hydraulic oil container；It is electronic that entrance is respectively equipped at the both ends of first cooler, the second cooler
Door and outlet electrically operated gate；
The exit for becoming load ratio spill valve, loading spill valve surely is equipped with a positive force oil return non-return valve,
The exit of the ratio spill valve is equipped with a reaction force oil return non-return valve.
Another aspect of the present invention additionally provides a kind of thermal power plant's coal pulverizer hydraulic oil system start-up and shut-down control method, the thermoelectricity
Factory's coal pulverizer hydraulic oil system start-up and shut-down control method includes：
Judge whether that the first cooler entrance electrically operated gate and outlet electrically operated gate have been opened, and the second cooler entrance electrically operated gate
It has been closed with outlet electrically operated gate；If not, issuing the instruction opened the first cooler entrance electrically operated gate and export electrically operated gate, and close
It closes the second cooler entrance electrically operated gate and exports the instruction of electrically operated gate；
If the first cooler entrance electrically operated gate and outlet electrically operated gate have been opened, and the second cooler entrance electrically operated gate
It has been closed with outlet electrically operated gate, has judged whether that the first accumulator delivery valve and the second accumulator delivery valve have been opened；If first
Accumulator delivery valve and/or the second accumulator delivery valve are not opened, are issued and are opened the first accumulator delivery valve and the confession of the second accumulator
The instruction of oil valve；
If the first accumulator delivery valve and the second accumulator delivery valve have been opened, judge whether the first hydraulic oil pump
It has been turned on；If first hydraulic oil pump is inactive, the instruction of the first hydraulic oil pump of starting is issued；
If first hydraulic oil pump has been turned on, judge whether to have thrown hydraulic oil pump interlocking；If not throwing hydraulic oil pump
Interlocking issues the instruction for throwing hydraulic oil pump interlocking；
If having thrown hydraulic oil pump interlocking, judge whether that switching solenoid valve has charged；If the non-band of switching solenoid valve
Electricity is emitted to the instruction that the switching solenoid valve powers on, and loads spill valve surely with investment；
If the switching solenoid valve has charged, judge whether that positive force is invariable, and coal pulverizer hydraulic oil system
It works normally；
If positive force is invariable, and coal pulverizer hydraulic oil system works normally；Judge whether that switching solenoid valve loses
Electricity；If the non-power loss of switching solenoid valve, switching solenoid valve power down instructions are issued；
If switching solenoid valve power loss, judge whether to become the load ratio spill valve automatic gear of coal feeding amount, and
The ratio spill valve automatic gear of coal feeding amount；If becoming load ratio spill valve and/or the non-coal feeding amount automatic transmission of ratio spill valve
Position, the instruction of the automatic gear of load ratio spill valve coal feeding amount will be become by issuing, and by the automatic gear of ratio spill valve coal feeding amount
Instruction；
If the change load ratio spill valve automatic gear of coal feeding amount, and ratio spill valve also coal feeding amount automatic transmission
Position judges whether that the size of positive force and reaction force follows coal amount to change and change, and coal pulverizer hydraulic oil system works
Normally.
The beneficial effect of the embodiment of the present invention is：Thermal power plant's coal pulverizer hydraulic oil system provided in an embodiment of the present invention and
Its start-up and shut-down control method can realize oneself of coal pulverizer hydraulic oil system under thermal power plant's coal pulverizer hydraulic oil system full cut-off state
Dynamic starting；Under thermal power plant's coal pulverizer hydraulic oil system operating status, being automatically stopped for coal pulverizer hydraulic oil system is realized；And
Artificial judgement is taken into account, the leapfrog operation of thermal power plant's coal pulverizer hydraulic oil system programed logic may be implemented, work as process control
Whether the service condition of a certain step of logic is that when meeting to cause step sequence that can not carry out, Rule of judgment can artificially can ignore simultaneously
Leapfrog movement is operated, continues the operation of programed logic until starting finishes.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of thermal power plant of embodiment of the present invention coal pulverizer hydraulic oil system；
Fig. 2 is the Booting sequence schematic diagram of thermal power plant of embodiment of the present invention coal pulverizer hydraulic oil system；
Fig. 3 is the stopping flow diagram of thermal power plant of embodiment of the present invention coal pulverizer hydraulic oil system.
Appended drawing reference
1. 2. second hydraulic oil pump of the first hydraulic oil pump
3. 4. second hydraulic oil pump outlet non-return valve of the first hydraulic oil pump outlet non-return valve
5. switching solenoid valve 6. becomes load ratio spill valve
7. loading 8. positive force oil return non-return valve of spill valve surely
9. 10. reaction force oil return non-return valve of ratio spill valve
11. 12. first accumulator pressure maintaining valve of the first accumulator delivery valve
13. 14. second accumulator pressure maintaining valve of the second accumulator delivery valve
15. 16. first cooler entrance electrically operated gate of hydraulic cylinder
17. 18. first cooler outlet electrically operated gate of the first cooler
19. 20. second cooler of the second cooler entrance electrically operated gate
21. 22. hydraulic oil container of the second cooler outlet electrically operated gate
23. 24. second accumulator of the first accumulator
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.
As shown in Figure 1, the embodiment of the invention provides a kind of thermal power plant's coal pulverizer hydraulic oil system, which is mainly wrapped
It includes：Hydraulic oil container 22, the first hydraulic oil pump 1, the second hydraulic oil pump 2, the first accumulator 23, the second accumulator 24, first are cooling
Device 17, the second cooler 20, hydraulic cylinder 15, switching solenoid valve 5, change load ratio spill valve 6, load spill valve 7, ratio are overflow surely
Oil valve 9 and a plurality of pipeline.
Wherein, the first hydraulic oil pump 1 and the second hydraulic oil pump 2 are arranged in hydraulic oil container 22, in two hydraulic oil pumps
Exit be respectively equipped with the first hydraulic oil pump outlet non-return valve 3 and the second hydraulic oil pump outlet non-return valve 4, in the first hydraulic oil
The oil outlet of pump discharge non-return valve 3 and the second hydraulic oil pump outlet non-return valve 4 is equipped with contact pipeline.First hydraulic oil pump 1 passes through
Two-way oil supply pipe is separately connected the positive interaction room and reaction room of hydraulic cylinder 15, and hydraulic cylinder 15 connects coal pulverizer by connecting rod
Grinding roller, to drive grinding roller to do work.First accumulator 23 and the second accumulator 24 are separately positioned on two-way oil supply pipe, first
The inlet of accumulator 23 and the second accumulator 24 is respectively equipped with accumulator delivery valve 11 and 13, also, in the first accumulator 23
And second accumulator 24 lead to the exit of oil returning tube and be respectively equipped with an energy-storing pressure-stabilizing valve 12 and 14.
Switching solenoid valve 5, become load ratio spill valve 6, surely load spill valve 7 setting the first hydraulic oil pump 1 with it is hydraulic
On the first oil returning tube between the positive interaction room of cylinder 15, wherein switching solenoid valve 5 becomes load ratio spill valve 6 for switching
And spill valve 7 is loaded surely.Second between the first hydraulic oil pump 1 and the reaction room of hydraulic cylinder 15 is arranged in ratio spill valve 9
On oil returning tube.After first oil returning tube and the second oil returning tube converge, the first cooler 17, second through being connected in parallel is cooling
Device 20 is connect with hydraulic oil container 22.The first cooler entrance electrically operated gate 16 and first is respectively equipped at the both ends of the first cooler 17
Cooler outlet electrically operated gate 18 is similarly also respectively equipped with the second cooler entrance electrically operated gate at the both ends of the second cooler 20
19 and the second cooler outlet electrically operated gate 21.
In addition, becoming load ratio spill valve 6, loading the exit of spill valve 7 surely equipped with a positive force oil return non-return valve
8, a reaction force oil return non-return valve 10 is equipped in the exit of ratio spill valve 9.
As shown in Figure 1, being additionally provided with other necessary pipelines, valve in power plant boiler fuel system of the embodiment of the present invention
And related thermal technology's measuring point etc..For example, pressure-measuring-pointTemperature pointAnd liquid level measuring point
Coal pulverizer is by the active force between grinding roller and mill come grinding powder coal in the process of running, in response to
Grinding demand under different load, different coal amounts, needs to apply different size of active force to grinding roller.Utilize the embodiment of the present invention
Thermal power plant's coal pulverizer hydraulic oil system of offer can be applied to hydraulic cylinder positive force and anti-in coal pulverizer operational process
Active force is ultimately applied on grinding roller, to respond demand of the coal pulverizer under different load to positive and negative active force.
First hydraulic oil pump 1 or the second hydraulic oil pump 2 take oily boosting from hydraulic oil container 22, are divided into two-way and send to hydraulic cylinder
15 positive interaction room and reaction room, forms hydraulic positive force and reaction force, is ultimately applied to grinding roller, meet different load
Under coal pulverizer active force demand.
Wherein, positive force one routes the first hydraulic oil pump 1 (or second hydraulic oil pump 2) and pumps out, by the first hydraulic oil
Pump discharge non-return valve 3 (or second hydraulic oil pump outlet non-return valve 4), send to the positive force room of hydraulic cylinder 15；Positive force oil
For pressure by determining load spill valve 7 and becoming load ratio spill valve 6 to adjust on oil return line, their aperture determines oil return
Amount, so as to adjust charge oil pressure, the switching between them is determined by the electrification and power loss of switching solenoid valve 5.Wherein, when
When coal pulverizer hydraulic oil system operates normally, switching solenoid valve 5 is generally in power failure state, this time-varying loads ratio spill valve 6
Conducting, when becoming load ratio 6 failure of spill valve, switching solenoid valve 5 is powered on, and is loaded spill valve 7 surely and is connected.Reaction force is all the way
It is pumped out by the first hydraulic oil pump 1 (or second hydraulic oil pump 2), by the first hydraulic oil pump outlet non-return valve 3 (or the second hydraulic oil
Pump discharge non-return valve 4), it send to the reaction-force chamber of hydraulic cylinder 15；Reaction-force oil pressure passes through the ratio oil spilling on oil return line
Valve 9 is adjusted.Two-way oil feed line is both provided with accumulator, and the effect of accumulator is to stablize oil pressure.Two-way oil return line converge to
After one piece, hydraulic oil container 22 is back to by a pair of of cooler group.Cooler group a preparation and a use, cooler conducting side pass through cooling water
Oil return heat is taken away.
Above-mentioned the first hydraulic oil pump 1 and the second hydraulic oil pump 2 mutual backup under normal circumstances such as only puts into a liquid
When pressure oil pump is not able to satisfy hydraulic system pressure, two hydraulic oil pumps can be put into simultaneously.
In one embodiment, above-mentioned thermal power plant's coal pulverizer hydraulic oil system further includes：Coal pulverizer hydraulic oil system program
Control logic operation button A1, hydraulic oil pump interlocking throw standby button A2, manual confirmation and load spill valve button A3 working properly surely
And manual confirmation becomes load ratio spill valve button A4 working properly.Above-mentioned button for example can be set in distributed AC servo system system
On the control panel of system.
Using above-mentioned block push button, equipment interlocking can be automatically engaged.After interlocking investment, if wherein a certain equipment is jumped
When lock, another equipment can rapid interlocked startup, maintain system normal operation.For example, when standby button is thrown in hydraulic oil pump interlocking
After A2 is pressed, if the first hydraulic oil pump 1 trips, the second hydraulic oil pump 2 can rapid interlocked startup.
The embodiment of the invention also provides a kind of start-up and shut-down control method of thermal power plant's coal pulverizer hydraulic oil system, the start and stop controls
The executing subject of method processed can be computer system or dcs.As shown in Fig. 2, the start-up and shut-down control method is main
Include the following steps：
Step S101, judge whether that 1. the first cooler entrance electrically operated gate 16 and the first cooler outlet electrically operated gate 18 are
It opens, 2. and the second cooler entrance electrically operated gate 19 and the first cooler outlet electrically operated gate 21 have been closed.If above-mentioned two condition
Have that a condition is unsatisfactory for or two conditions are all unsatisfactory for, then carry out step S102, issues and open the first cooler entrance electricity
The instruction of dynamic door 16 and the first cooler outlet electrically operated gate 18, and close the second cooler entrance electrically operated gate 19 and the second cooler
Export the instruction of electrically operated gate 21.If the first cooler entrance electrically operated gate 16 and the first cooler outlet electrically operated gate 18 have been opened,
And second cooler entrance electrically operated gate 19 and the second cooler outlet electrically operated gate 21 closed, carry out step S103.
Step S103, judge whether that the first accumulator delivery valve 11 and the second accumulator delivery valve 13 have been opened.If two
A accumulator delivery valve has one to be not switched on or two are not switched on, then carries out step S104, issues and opens the confession of the first accumulator
The instruction of oil valve 11 and the second accumulator delivery valve 13.If two accumulator delivery valves have been opened, step S105 is carried out.
Step S105, judge whether that the first hydraulic oil pump 1 has been turned on.If the first hydraulic oil pump 1 is inactive, walked
Rapid S106 issues the instruction of the first hydraulic oil pump 1 of starting.If the first hydraulic oil pump 1 has been turned on, step S107 is carried out.
Step S107, judge whether to have thrown hydraulic oil pump interlocking.If not throwing hydraulic oil pump interlocking, step is carried out
S108 issues the instruction for throwing hydraulic oil pump interlocking.If having thrown hydraulic oil pump interlocking, step S109 is carried out.
The purpose of step S107-S108 be investment hydraulic oil pump interlocking, investment interlocking after, when encounter system pressure it is low or
When one hydraulic oil pump tripping, meeting another hydraulic oil pump of automatic linkage maintains system oil pressure to stablize.
Step S109, judge whether that switching solenoid valve 5 has charged.If switching solenoid valve 5 does not charge, step is carried out
S110 is emitted to the instruction that switching solenoid valve 5 powers on, and loads spill valve 7 surely to put into.If switching solenoid valve 5 has charged, throw
After entering load spill valve 7 investment surely, step S111 is carried out.
Step S111, judge whether that 1. positive force is invariable, 2. and coal pulverizer hydraulic oil system works normally.Such as
After fruit investment loads spill valve 7 surely, positive force is invariable, and coal pulverizer hydraulic oil system works normally, and carries out step
S112。
Step S112, judge whether the power loss of switching solenoid valve 5.If the non-power loss of switching solenoid valve 5, carries out step
S113 issues 5 power down instructions of switching solenoid valve.If the power loss of switching solenoid valve 5 carries out step S114.
2. and ratio spill valve 9 step S114, judge whether 1. to become the automatic gear of coal feeding amount of load ratio spill valve 6,
The automatic gear of coal feeding amount.If becoming the perhaps automatic gear of the non-coal feeding amount of ratio spill valve 9 or two of load ratio spill valve 6
The non-automatic gear of coal feeding amount of spill valve then carries out step S115, and the 6 automatic gear of coal feeding amount of load ratio spill valve will be become by issuing
Instruction, and by the instruction of the automatic gear of 9 coal feeding amount of ratio spill valve.If becoming load ratio spill valve 6 coal feeding amount and ratio
The example spill valve 9 automatic gear of coal feeding amount, then carry out step S116.
Step S116, judge whether that the size of 1. positive force and reaction force follows coal amount to change and change, 2. and grind
Coal machine hydraulic oil system is working properly.If above-mentioned two condition meets simultaneously, terminate.
Start-up and shut-down control method shown in Fig. 2 is used to control the starting of thermal power plant's coal pulverizer hydraulic oil system, therefore shown in Fig. 2
Start-up and shut-down control method is referred to as the starting step of thermal power plant's coal pulverizer hydraulic oil system.
In one embodiment, the enabled condition of starting step sequence is：1. cooling water system operates normally；2. in hydraulic oil container 22
Liquid level it is normal.That is, needing to prejudge the first cooling hydrophone and the second cooler of thermal power plant before carrying out step S101
Whether normal operation and whether the liquid level in hydraulic oil container 22 is normal, under the case where above-mentioned two condition meets simultaneously,
Coal pulverizer hydraulic oil system is allowed to start.
The embodiment of the present invention also provides a kind of start-up and shut-down control method of thermal power plant's coal pulverizer hydraulic oil system, the start-up and shut-down control
The executing subject of method can be computer system or dcs.As shown in figure 3, the start-up and shut-down control method is mainly wrapped
Include following steps：
Step S201, it is automatic to judge whether that change load ratio spill valve 6 and ratio spill valve 9 have released coal amount.If
Becoming load ratio spill valve 6 and/or ratio spill valve 9, not release coal amount automatic, then carries out step S202, issues to release and becomes load
Ratio spill valve 6 and 9 coal amount of ratio spill valve automatically instruct.If becoming load ratio spill valve 6 and ratio spill valve 9
It is automatic to release coal amount, carries out step S203.
Step S203, judge whether to have released hydraulic oil pump interlocking.If not releasing hydraulic oil pump interlocking, step is carried out
S204 issues the instruction for releasing hydraulic oil pump interlocking.If having released hydraulic oil pump interlocking, step S205 is carried out.
Step S205, judge whether that the first hydraulic oil pump 1 and the second hydraulic oil pump 2 are out of service.If the first liquid
Pressure oil pump 1 and/or the second hydraulic oil pump 2 be not out of service, then carries out step S206, issues the first hydraulic oil pump 1 out of service
With the instruction of the second hydraulic oil pump 2.
Start-up and shut-down control method shown in Fig. 3 is used to control the stopping of thermal power plant's coal pulverizer hydraulic oil system, therefore the start and stop of Fig. 3
Control method is properly termed as the stopping step of thermal power plant's coal pulverizer hydraulic oil system.
In one embodiment, the enabled condition of stopping step sequence is：Coal pulverizer is out of service.That is, carrying out step S201
Before, it needs to prejudge coal pulverizer and run whether it has stopped, only in the case where coal pulverizer is out of service, just allow to stop
Only.
Fig. 2 and start-up and shut-down control method shown in Fig. 3 are the journey of moderate heat of embodiment of the present invention power plant coal hydraulic oil system
Sequence control logic.Following functions may be implemented using the programed logic：In thermal power plant's coal pulverizer hydraulic oil system full cut-off
Under state, the automatic starting of coal pulverizer hydraulic oil system is realized；Under thermal power plant's coal pulverizer hydraulic oil system operating status, realize
Coal pulverizer hydraulic oil system is automatically stopped；When thermal power plant's coal pulverizer hydraulic oil system startup program is run to a certain step, item
Part is unsatisfactory for, if artificially judging, the condition be can ignore that, can carry out the operation that leapfrog movement continues startup program manually, until
The starting of coal pulverizer hydraulic oil system finishes.
Each step in start-up and shut-down control method shown in Fig. 2 and Fig. 3, first judges whether feedback receives, and continues if receiving
In next step；If do not received, instruction is issued, waits to be feedback receive.When not receiving due feedback signal, process control is patrolled
The step can be rested on by collecting, and wait worker operation.Power plant operations staff can find the current operation step unreceived feedback signal of sequence,
Artificially judge whether unreceived feedback signal influences continuing to execute for program programed logic.If the feedback signal does not influence
Present procedure control logic continues, and operations staff can operate the execution that leapfrog movement continues programed logic；If
The feedback signal influences continuing for present procedure control logic, then operations staff can not meet according to each found
Feedback signal, targetedly go investigation problem, until receive the feedback signal, continue to execute programed logic.
By the start-up and shut-down control method in Fig. 2 and Fig. 3, can under thermal power plant's coal pulverizer hydraulic oil system full cut-off state,
Realize the automatic starting of coal pulverizer hydraulic oil system；Under thermal power plant's coal pulverizer hydraulic oil system operating status, coal pulverizer is realized
Hydraulic oil system is automatically stopped.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Specific embodiment is applied in the present invention, and principle and implementation of the present invention are described, above embodiments
Explanation be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art,
According to the thought of the present invention, there will be changes in the specific implementation manner and application range, in conclusion in this specification
Appearance should not be construed as limiting the invention.
Claims (4)
1. a kind of thermal power plant's coal pulverizer hydraulic oil system start-up and shut-down control method, which is characterized in that thermal power plant's coal pulverizer is hydraulic
Oil system, including：Thermal power plant's coal pulverizer hydraulic oil system includes：Hydraulic oil container, the first hydraulic oil pump, the second hydraulic oil
Pump, the first accumulator, the second accumulator, the first cooler, the second cooler, hydraulic cylinder, switching solenoid valve, change load ratio are overflow
Oil valve loads spill valve, ratio spill valve, a plurality of pipeline, coal pulverizer hydraulic oil system programed logic operation button, liquid surely
Pressure oil pump interlocking throws standby button, manual confirmation and loads spill valve button working properly and manual confirmation change load ratio spill valve surely
Button working properly；
First hydraulic oil pump and the second hydraulic oil pump are arranged in the hydraulic oil container, in the exit of two hydraulic oil pumps
It is respectively equipped with hydraulic oil pump outlet non-return valve, is equipped with contact pipeline in the oil outlet of the outlet non-return valve；Described first is hydraulic
Oil pump is separately connected the positive interaction room and reaction room of the hydraulic cylinder by two-way oil supply pipe, and the hydraulic cylinder passes through connecting rod
Connect the grinding roller of coal pulverizer；First accumulator and the second accumulator are separately positioned on two-way oil supply pipe, described
The inlet of one accumulator and the second accumulator is respectively equipped with delivery valve, and first accumulator and the second accumulator lead to back
The exit of oil-piping is respectively equipped with a pressure maintaining valve；
The switching solenoid valve, become load ratio spill valve, surely load spill valve setting first hydraulic oil pump with it is hydraulic
On the first oil returning tube between cylinder positive interaction room, the switching solenoid valve is for switching the change load ratio spill valve and determining
Load spill valve；The second oil return between first hydraulic oil pump and hydraulic cylinder reaction room is arranged in the ratio spill valve
On pipeline；It is first cooler through being connected in parallel, second cold after first oil returning tube and the second oil returning tube converge
But device is connect with the hydraulic oil container；The both ends of first cooler, the second cooler be respectively equipped with entrance electrically operated gate and
Export electrically operated gate；
The exit for becoming load ratio spill valve, loading spill valve surely is equipped with a positive force oil return non-return valve, described
The exit of ratio spill valve is equipped with a reaction force oil return non-return valve；
Thermal power plant's coal pulverizer hydraulic oil system start-up and shut-down control method includes：
Judge whether that the first cooler entrance electrically operated gate and the first cooler outlet electrically operated gate have been opened, and the second cooler entrance
Electrically operated gate and the second cooler outlet electrically operated gate have been closed；The first cooler entrance electrically operated gate and first is opened if not, issuing
The instruction of cooler outlet electrically operated gate, and close the finger of the second cooler entrance electrically operated gate and the second cooler outlet electrically operated gate
It enables；
If the first cooler entrance electrically operated gate and the first cooler outlet electrically operated gate have been opened, and the second cooler entrance
Electrically operated gate and the second cooler outlet electrically operated gate have been closed, and judge whether the first accumulator delivery valve and the second accumulator delivery valve
Open；If the first accumulator delivery valve and/or the second accumulator delivery valve are not opened, issues and open the first accumulator delivery valve
And second accumulator delivery valve instruction；
If the first accumulator delivery valve and the second accumulator delivery valve have been opened, judge whether that the first hydraulic oil pump has opened
It is dynamic；If first hydraulic oil pump is inactive, the instruction of the first hydraulic oil pump of starting is issued；
If first hydraulic oil pump has been turned on, judge whether to have thrown hydraulic oil pump interlocking；If not throwing hydraulic oil pump interlocking,
Issue the instruction for throwing hydraulic oil pump interlocking；
If having thrown hydraulic oil pump interlocking, judge whether that switching solenoid valve has charged；If the switching solenoid valve does not charge, hair
The instruction powered on out to the switching solenoid valve loads spill valve with investment surely；
If the switching solenoid valve has charged, judge whether that positive force is invariable, and coal pulverizer hydraulic oil system is normal
Work；
If positive force is invariable, and coal pulverizer hydraulic oil system works normally；Judge whether switching solenoid valve power loss；Such as
The non-power loss of switching solenoid valve described in fruit issues switching solenoid valve power down instructions；
If switching solenoid valve power loss, judge whether to become the load ratio spill valve automatic gear of coal feeding amount, and ratio
The spill valve automatic gear of coal feeding amount；If becoming load ratio spill valve and/or the automatic gear of the non-coal feeding amount of ratio spill valve, hair
The instruction of the automatic gear of load ratio spill valve coal feeding amount will be become out, and by the instruction of the automatic gear of ratio spill valve coal feeding amount；
If the change load ratio spill valve automatic gear of coal feeding amount, and the ratio spill valve also automatic gear of coal feeding amount,
Judge whether that the size of positive force and reaction force follows coal amount to change and change, and the work of coal pulverizer hydraulic oil system is just
Often.
2. thermal power plant's coal pulverizer hydraulic oil system start-up and shut-down control method according to claim 1, which is characterized in that the fire
Power plant coal hydraulic oil system start-up and shut-down control method further includes：
It is automatic to judge whether that change load ratio spill valve and ratio spill valve have released coal amount；If becoming load ratio spill valve
And/or not release coal amount automatic for ratio spill valve, issues to release and becomes load ratio spill valve and ratio spill valve coal amount is automatic
Instruction；
If it is automatic that the change load ratio spill valve and ratio spill valve have released coal amount, judge whether to have released hydraulic oil
Pump interlocking；If not releasing hydraulic oil pump interlocking, the instruction for releasing hydraulic oil pump interlocking is issued；
If having released hydraulic oil pump interlocking, judge whether that the first hydraulic oil pump and the second hydraulic oil pump are out of service；Such as
First hydraulic oil pump and/or the second hydraulic oil pump described in fruit be not out of service, issues the first hydraulic oil pump out of service and second
The instruction of hydraulic oil pump.
3. thermal power plant's coal pulverizer hydraulic oil system start-up and shut-down control method according to claim 1, which is characterized in that judging
Whether the first cooler entrance electrically operated gate and the first cooler outlet electrically operated gate have been opened, and the second cooler entrance electrically operated gate and
Before second cooler outlet electrically operated gate has been closed, thermal power plant's coal pulverizer hydraulic oil system start-up and shut-down control method further includes：
Judge whether the first cooler and the second cooler normal operation, and the liquid level in hydraulic oil container is normal；
If first cooler and the second cooler normal operation, and the liquid level in hydraulic oil container would be normal, then judges whether
First cooler entrance electrically operated gate and outlet electrically operated gate have been opened, and the second cooler entrance electrically operated gate and outlet electrically operated gate are
It closes.
4. thermal power plant's coal pulverizer hydraulic oil system start-up and shut-down control method according to claim 2, which is characterized in that judging
Whether change load ratio spill valve and ratio spill valve released coal amount it is automatic before, thermal power plant's coal pulverizer hydraulic oil system
System start-up and shut-down control method further include：
Judge whether that coal pulverizer is out of service；
If coal pulverizer is out of service, then judges whether that becoming load ratio spill valve and ratio spill valve has released coal amount certainly
It is dynamic.
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| CN201710046185.3A CN106762875B (en) | 2017-01-22 | 2017-01-22 | A kind of thermal power plant's coal pulverizer hydraulic oil system and its start-up and shut-down control method |
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| CN113713957B (en) * | 2021-08-12 | 2022-11-29 | 杭州意能电力技术有限公司 | Self-starting control method for pulverizing system of medium-speed roller type coal mill configured for thermal power generating unit |
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