CN206409448U - A kind of thermal power plant's coal pulverizer hydraulic oil system - Google Patents
A kind of thermal power plant's coal pulverizer hydraulic oil system Download PDFInfo
- Publication number
- CN206409448U CN206409448U CN201720079592.XU CN201720079592U CN206409448U CN 206409448 U CN206409448 U CN 206409448U CN 201720079592 U CN201720079592 U CN 201720079592U CN 206409448 U CN206409448 U CN 206409448U
- Authority
- CN
- China
- Prior art keywords
- hydraulic oil
- valve
- hydraulic
- spill valve
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000010720 hydraulic oil Substances 0.000 title claims abstract description 145
- 239000003245 coal Substances 0.000 title claims abstract description 84
- 239000003921 oil Substances 0.000 claims abstract description 51
- 230000008859 change Effects 0.000 claims abstract description 14
- 230000003993 interaction Effects 0.000 claims abstract description 12
- 238000000227 grinding Methods 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 4
- 238000012790 confirmation Methods 0.000 claims description 3
- 239000002828 fuel tank Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
Landscapes
- Disintegrating Or Milling (AREA)
Abstract
The utility model provides a kind of thermal power plant's coal pulverizer hydraulic oil system, and the system includes：Hydraulic oil container, two hydraulic oil pumps, two accumulators, two coolers, hydraulic cylinder, switching solenoid valve, surely change loading ratio spill valve, loading spill valve, ratio spill valve and a plurality of pipeline；Two hydraulic oil pumps are arranged in the hydraulic oil container, and outlet non-return valve is equipped with the exit of two hydraulic oil pumps；Hydraulic oil pump connects positive interaction room and reaction room respectively by two-way oil supply pipe；Two accumulators are separately positioned on two oil supply pipes, and delivery valve is provided with accumulator entrance, and exit is provided with pressure maintaining valve；Switching solenoid valve, become loading ratio spill valve, surely loading spill valve be arranged on the oil returning tube between hydraulic oil pump and positive interaction room, become loading ratio spill valve for switching and load 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 after converging through cooler with hydraulic oil container.
Description
Technical field
The utility model is related to thermal power generating technology field, more particularly to a kind of thermal power plant's coal pulverizer hydraulic oil system.
Background technology
The existing coal pulverizer hydraulic oil system of thermal power plant it is main 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 bar respectively, and the coal of feeder outlet is fallen by central coal conduit
On middle 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 loading
System, the hydraulic pressure grinding forces of this system are adjustable, corresponding optimal grinding forces are can be adjusted under different operating modes, by changing
The input of proportional pressure control valve electric signal is adjusted, and when ature of coal changes or meets quick change, grinding forces can be fast
Velocity modulation section, hydraulic loaded coal pulverizer has more preferable service condition.But, existing thermal power plant is in coal pulverizer hydraulic oil system full cut-off
, also can not be under coal pulverizer hydraulic oil system running status under state, it is impossible to realize the automatic start of coal pulverizer hydraulic oil system
Being automatically stopped for coal pulverizer hydraulic oil system is realized, and when coal pulverizer hydraulic oil system startup program is run to a certain step,
If the step sequence condition is unsatisfactory for, it is impossible to continue the operation of startup program.That is, the operation and stopping of existing coal pulverizer hydraulic oil system
Human intervention is required to, this considerably increases workload and human cost, and if can not start or stop in time coal pulverizer
Hydraulic oil system, then can influence unit normally to run.
Utility model content
In order to solve the above technical problems, the utility model embodiment provides a kind of thermal power plant's coal pulverizer hydraulic oil system,
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,
Second accumulator, the first cooler, the second cooler, hydraulic cylinder, switching solenoid valve, change loading ratio spill valve, fixed loading are overflow
Fuel tap, ratio spill valve and a plurality of pipeline；
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
Hydraulic oil pump outlet non-return valve is respectively equipped with mouthful, contact pipeline is provided with the oil-out of the outlet non-return valve；Described first
Hydraulic oil pump connects the positive interaction room and reaction room of the hydraulic cylinder by two-way oil supply pipe respectively, and the hydraulic cylinder passes through
Connecting rod connects the grinding roller of coal pulverizer；First accumulator and the second accumulator are separately positioned on two-way oil supply pipe, in institute
The porch 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 loading ratio spill valve, surely loading spill valve be arranged on first hydraulic oil pump with
On the first oil returning tube between hydraulic cylinder positive interaction room, the switching solenoid valve is used to switch the change loading ratio spill valve
And spill valve is loaded surely；The ratio spill valve is arranged on second between first hydraulic oil pump and hydraulic cylinder reaction room
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 connected with the hydraulic oil container；It is electronic that entrance is respectively equipped with the two ends of first cooler, the second cooler
Door and outlet electrically operated gate；
The change loading ratio spill valve, the surely exit of loading spill valve are provided with a positive force oil return non-return valve,
The exit of the ratio spill valve is provided with a reaction force oil return non-return valve.
The beneficial effect of the utility model embodiment is：Thermal power plant's coal pulverizer hydraulic pressure that the utility model embodiment is provided
Oil system can realize the automatic start of coal pulverizer hydraulic oil system under thermal power plant's coal pulverizer hydraulic oil system full cut-off state；
Under thermal power plant's coal pulverizer hydraulic oil system running status, being automatically stopped for coal pulverizer hydraulic oil system is realized；And take into account people
To judge, it is possible to achieve the leapfrog operation of thermal power plant's coal pulverizer hydraulic oil system programed logic, when programed logic
When the service condition of one step is that satisfaction causes step sequence not carry out, artificially Rule of judgment whether can ignore and operate jump
Step is acted, and is continued the operation of programed logic and is finished until starting.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the utility model embodiment thermal power plant coal pulverizer hydraulic oil system；
Fig. 2 walks sequence schematic diagram for the startup of the utility model embodiment thermal power plant coal pulverizer hydraulic oil system；
Fig. 3 walks sequence schematic diagram for the stopping of the utility model embodiment thermal power plant coal pulverizer hydraulic oil system.
1. the hydraulic oil pump of the first hydraulic oil pump 2. first
3. the hydraulic oil pump outlet non-return valve pump of the first hydraulic oil pump outlet non-return valve pump 4. first
5. switching solenoid valve 6. becomes loading ratio spill valve
7. the positive force oil return non-return valve of spill valve 8. is loaded surely
9. the reaction force oil return non-return valve of ratio spill valve 10.
11. the accumulator pressure maintaining valve of the first accumulator delivery valve 12. first
13. the accumulator pressure maintaining valve of the second accumulator delivery valve 14. second
15. the cooler entrance electrically operated gate of hydraulic cylinder 16. first
17. the cooler outlet electrically operated gate of the first cooler 18. first
19. the cooler of the second cooler entrance electrically operated gate 20. second
21. the hydraulic oil container of the second cooler outlet electrically operated gate 22.
23. the accumulator of the first accumulator 24. second
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
As shown in figure 1, the utility model embodiment provides a kind of thermal power plant's coal pulverizer hydraulic oil system, the system is main
Including：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 cold
But device 17, the second cooler 20, hydraulic cylinder 15, switching solenoid valve 5, become loading ratio spill valve 6, surely loading spill valve 7, ratio
Spill 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 hydraulic oil pump outlet non-return valve 3 and 4, hydraulic oil pump outlet non-return valve 3 and 4 oil-out provided with connection
Network pipeline.First hydraulic oil pump 1 distinguishes the positive interaction room and reaction room of connection liquid cylinder pressure 15, hydraulic pressure by two-way oil supply pipe
Cylinder 15 connects the grinding roller of coal pulverizer by connecting rod, to drive grinding roller to do work.First accumulator 23 and the second accumulator 24 are set respectively
Put on two-way oil supply pipe, accumulator delivery valve 11 is respectively equipped with the porch of the first accumulator 23 and the second accumulator 24
With 12, also, it is steady in the exit that the first accumulator 23 and the second accumulator 24 lead to oil returning tube to be respectively equipped with an accumulation of energy
Pressure valve 12 and 14.
Switching solenoid valve 5, become loading ratio spill valve 6, surely loading spill valve 7 be arranged on the first hydraulic oil pump 1 and hydraulic pressure
On the first oil returning tube between the positive interaction room of cylinder 15, wherein, switching solenoid valve 5, which is used to switch, becomes loading ratio spill valve 6
And spill valve 7 is loaded surely.Ratio spill valve 9 is arranged on second between the first hydraulic oil pump 1 and the reaction room of hydraulic cylinder 15
On oil returning tube.After first oil returning tube and the second oil returning tube converge, the first cooler 17, second cooling through being connected in parallel
Device 20 is connected with hydraulic oil container 22.Entrance electrically operated gate 16 and outlet electrically operated gate 18 are respectively equipped with the two ends of the first cooler 17,
Similarly, entrance electrically operated gate 19 and outlet electrically operated gate 21 are also respectively equipped with the two ends of the second cooler 20.
In addition, becoming loading ratio spill valve 6, loading the exit of spill valve 7 surely provided with a positive force oil return non-return valve
8, it is provided with a reaction force oil return non-return valve 10 in the exit of ratio spill valve 9.
As shown in figure 1, be additionally provided with the utility model embodiment power plant boiler fuel system other necessary pipelines,
Valve and related thermal technology's measuring point etc..For example, pressure-measuring-pointTemperature pointAnd liquid level measuring point
Coal pulverizer in the process of running, be by the active force between grinding roller and mill come grinding powder coal, in response to
Grinding demand under different load, different coal amounts to grinding roller, it is necessary to apply different size of active force.It is real using the utility model
Thermal power plant's coal pulverizer hydraulic oil system of example offer is provided, the positive positive interaction of hydraulic cylinder can be applied in coal pulverizer running
Power and reaction force, are ultimately applied on grinding roller, thus respond coal pulverizer aligned under different load, the demand of reaction force.
Hydraulic oil pump 1 or 2 takes oily boosting from hydraulic oil container 22, is divided into two-way and delivers to the positive interaction room of hydraulic cylinder 15 and anti-
Application chamber, forms hydraulic pressure positive force and reaction force, is ultimately applied to grinding roller, meets the coal pulverizer active force under different load
Demand.
Wherein, positive force one route hydraulic oil pump 1 (or hydraulic oil pump 2) pump out, by outlet non-return valve 3 (or outlet
Non-return valve 4), deliver to the positive force room of hydraulic cylinder 15；Positive force oil pressure on return line by determining the He of loading spill valve 7
Become loading ratio spill valve 6 to adjust, their aperture determines recirculating oil quantity, so as to adjust charge oil pressure, between them
Switching is determined by the powered and dead electricity of switching solenoid valve 5.Wherein, when coal pulverizer hydraulic oil system is normally run, switching electricity
Magnet valve 5 is generally in power failure state, and this time-varying loading ratio spill valve 6 is turned on, and when becoming loading ratio 6 failure of spill valve, is cut
Change electric on magnetic valve 5, spill valve 7 is loaded surely and is turned on.The route hydraulic oil pump 1 of reaction force one (or hydraulic oil pump 2) is pumped out, and is passed through
Outlet non-return valve 3 (or outlet non-return valve 4), delivers to the reaction-force chamber of hydraulic cylinder 15；Reaction-force oil pressure passes through return line
On ratio spill valve 9 adjust.Two-way oil feed line is both provided with accumulator, and the effect of accumulator is to stablize oil pressure.Two-way
Return line is converged to after one piece, and hydraulic oil container 22 is back to by a pair of cooler groups.Cooler group a preparation and a use, cooler conducting
Oil return heat is taken away by cooling water side.
Two above-mentioned hydraulic oil pumps 1 and 2 are standby each other under normal circumstances, and such as only putting into a hydraulic oil pump can not meet
During 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 also 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 loading ratio spill valve button A4 working properly.Above-mentioned button can for example be arranged on distributed AC servo system system
On the control panel of system.
Using above-mentioned block push button, equipment interlocking can be automatically engaged.After input is interlocked, if wherein a certain equipment is jumped
During lock, another equipment can interlocked startup rapidly, maintain system operation normal.For example, when standby button is thrown in hydraulic oil pump interlocking
After A2 is pressed, if the first hydraulic oil pump 1 trips, then the second hydraulic oil pump 2 can rapid interlocked startup.
Fig. 2 walks program flow diagram for the startup of the utility model embodiment thermal power plant coal pulverizer hydraulic oil system, such as Fig. 2 institutes
Show, startup step sequence is mainly included the following steps that：
2. and the step S101, judge whether that 1. the first cooler entrance electrically operated gate 16 and outlet electrically operated gate 18 have been opened,
Two cooler entrance electrically operated gates 19 and outlet electrically operated gate 21 have been closed.If above-mentioned two condition has a condition to be unsatisfactory for, or
Two conditions of person are all unsatisfactory for, then carry out step S102, send the first cooler entrance electrically operated gate of unlatching 16 and outlet electrically operated gate
18 instruction, and close the instruction of the second cooler entrance electrically operated gate 19 and outlet electrically operated gate 21.If the first cooler entrance
Electrically operated gate 16 and outlet electrically operated gate 18 have been opened, and the second cooler entrance electrically operated gate 19 and outlet electrically operated gate 21 have been closed, and are entered
Row 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
Individual accumulator delivery valve has one to be not switched on or two are not switched on, then carries out step S104, sends the first accumulator of unlatching and supplies
The instruction of the accumulator delivery valve 13 of fuel tap 11 and second.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 not actuated, walked
Rapid S106, sends the instruction for starting the first hydraulic oil pump 1.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, sends the instruction for throwing hydraulic oil pump interlocking.If having thrown hydraulic oil pump interlocking, step S109 is carried out.
Step S107-S108 purpose be input hydraulic oil pump interlocking, input interlocking after, when run into system pressure it is low or
, can another hydraulic oil pump of automatic linkage, maintenance system oil pressure stabilization during one hydraulic oil pump tripping operation.
Step S109, judge whether that switching solenoid valve 5 is powered.If switching solenoid valve 5 is not powered, step is carried out
S110, is emitted to instruction electric on switching solenoid valve 5, to put into fixed loading spill valve 7.If switching solenoid valve 5 is powered, throw
Enter after loading spill valve 7 input surely, carry out step S111.
2. and coal pulverizer hydraulic oil system normal work step S111, judge whether that 1. positive force is invariable,.Such as
Fruit input is surely after loading spill valve 7, and positive force is invariable, and coal pulverizer hydraulic oil system normal work, carries out step
S112。
Step S112, judge whether the dead electricity of switching solenoid valve 5.If the non-dead electricity of switching solenoid valve 5, carries out step
S113, sends the power down instructions of switching solenoid valve 5.If the dead electricity of switching solenoid valve 5, step S114 is carried out.
2. and ratio spill valve 9 step S114, judge whether 1. to become the automatic gear of coal feeding amount of loading ratio spill valve 6,
The automatic gear of coal feeding amount.If becoming the either automatic gear of non-coal feeding amount of ratio spill valve 9 or two of loading ratio spill valve 6
The non-automatic gear of coal feeding amount of spill valve, then carry out step S115, and the automatic gear of coal feeding amount of loading ratio spill valve 6 will be become by sending
Instruction, and by the instruction of the automatic gear of the coal feeding amount of ratio spill valve 9.If becoming loading 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 is met simultaneously, terminate.
In one embodiment, the enabled condition of startup step sequence is：1. cooling water system is normally run；2. hydraulic oil container 22
Interior liquid level is normal.That is, it is necessary to prejudge the first cooling hydrophone and the second cooling of thermal power plant before step S101 is carried out
Whether device normally runs, and whether the liquid level in hydraulic oil container 22 is normal, when above-mentioned two condition is met simultaneously,
Just coal pulverizer hydraulic oil system is allowed to start.
Fig. 3 walks program flow diagram for the stopping of the utility model embodiment thermal power plant coal pulverizer hydraulic oil system, such as Fig. 3 institutes
Show, stopping step sequence is mainly included the following steps that：
Step S201, judge whether to become loading ratio spill valve 6 and ratio spill valve 9 to have released coal amount automatic.If
Become loading ratio spill valve 6 and/or ratio spill valve 9 does not release coal amount automatically, then carry out step S202, send releasing and become loading
Ratio spill valve 6 and the coal amount of ratio spill valve 9 are automatically instructed.If becoming loading ratio spill valve 6 and ratio spill valve 9 being equal
Release coal amount automatic, carry out step S103.
Step S203, judge whether to have released hydraulic oil pump interlocking.If not releasing hydraulic oil pump interlocking, step is carried out
S204, sends 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
The hydraulic oil pump 2 of pressure oil pump 1 and/or second is not out of service, then carries out step S206, send the first hydraulic oil pump 1 out of service
With the instruction of the second hydraulic oil pump 2.
In one embodiment, the enabled condition of stopping step sequence is：Coal pulverizer is out of service.That is, step S201 is being carried out
Before, it is necessary to which whether prejudge coal pulverizer out of service, only in the case where coal pulverizer is out of service, just allow to stop
Only.
Start-up and shut-down control method shown in Fig. 2 and Fig. 3 is the utility model embodiment moderate heat power plant coal hydraulic oil system
Programed logic.Following functions can be realized using the programed logic：In thermal power plant's coal pulverizer hydraulic oil system
Under full cut-off state, the automatic start of coal pulverizer hydraulic oil system is realized；Under thermal power plant's coal pulverizer hydraulic oil system running status,
Realize being automatically stopped for coal pulverizer hydraulic oil system；When thermal power plant, coal pulverizer hydraulic oil system startup program is run to a certain step
When, condition is unsatisfactory for, if artificially judging, the condition can ignore that, the fortune that leapfrog action continues startup program can be carried out manually
OK, finished until coal pulverizer hydraulic oil system starts.
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
Next step；If do not received, instruction is sent, to be feedback receive is waited.When not receiving due feedback signal, programme-control is patrolled
The step can be rested on by collecting, and wait operative.Power plant operations staff can find the current operation step unreceived feedback signal of sequence,
Artificially judge whether unreceived feedback signal influences continuing executing with for program programed logic.If the feedback signal does not influence
Present procedure control logic proceeds, and operations staff can operate leapfrog action to continue the execution of programed logic；If
The feedback signal influences proceeding 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 executing with 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 start of coal pulverizer hydraulic oil system；Under thermal power plant's coal pulverizer hydraulic oil system running status, coal pulverizer is realized
Hydraulic oil system is automatically stopped.
Specific embodiment is applied in the utility model to be set forth principle of the present utility model and embodiment, with
The explanation of upper embodiment is only intended to help and understands structure of the present utility model and its core concept；Simultaneously for this area
Those skilled in the art, according to thought of the present utility model, will change in specific embodiments and applications, comprehensive
Upper described, this specification content should not be construed as to limitation of the present utility model.
Claims (5)
1. a kind of thermal power plant's coal pulverizer hydraulic oil system, it is characterised in that thermal power plant's coal pulverizer hydraulic oil system includes：Liquid
Press oil case, 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, surely change loading ratio spill valve, loading spill valve, ratio spill valve and a plurality of pipeline；
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
Hydraulic oil pump outlet non-return valve is respectively equipped with, contact pipeline is provided with the oil-out of the outlet non-return valve；First hydraulic pressure
Oil pump connects the positive interaction room and reaction room of the hydraulic cylinder by two-way oil supply pipe respectively, 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 porch 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 loading ratio spill valve, surely loading spill valve be arranged on first hydraulic oil pump and hydraulic pressure
On the first oil returning tube between cylinder positive interaction room, the switching solenoid valve is used to switch the change loading ratio spill valve and fixed
Load spill valve；The ratio spill valve is arranged on the second oil return between first hydraulic oil pump and hydraulic cylinder reaction room
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 connected with the hydraulic oil container；Be respectively equipped with the two ends of first cooler, the second cooler entrance electrically operated gate and
Export electrically operated gate；
The change loading ratio spill valve, the surely exit of loading spill valve are provided with a positive force oil return non-return valve, described
The exit of ratio spill valve is provided with a reaction force oil return non-return valve.
2. thermal power plant's coal pulverizer hydraulic oil system according to claim 1, it is characterised in that the liquid in the hydraulic oil container
After force feed is boosted through hydraulic oil pump, by hydraulic oil pump outlet non-return valve, the positive interaction room of hydraulic cylinder is delivered to, hydraulic pressure is formed and just makees
Firmly, the size of the hydraulic pressure positive force loads ratio spill valve by the change on first oil returning tube and fixed loading is overflow
The aperture of fuel tap is adjusted.
3. thermal power plant's coal pulverizer hydraulic oil system according to claim 1, it is characterised in that the liquid in the hydraulic oil container
Force feed is after hydraulic oil pump boosts, by hydraulic oil pump outlet non-return valve, delivers to the positive interaction room of hydraulic cylinder, forms hydraulic pressure reverse
Active force, the size of the hydraulic pressure reaction force is adjusted by the aperture of the ratio spill valve on second oil returning tube.
4. thermal power plant's coal pulverizer hydraulic oil system according to claim 1, it is characterised in that first oil returning tube and
Hydraulic oil oil return in second oil returning tube is back to the hydraulic pressure after first cooler and/or the cooling of the second cooler
Fuel tank.
5. thermal power plant's coal pulverizer hydraulic oil system according to claim 1, it is characterised in that thermal power plant's coal pulverizer liquid
Compressed-oil system also includes：Coal pulverizer hydraulic oil system programed logic operation button, hydraulic oil pump interlocking are thrown for button, manually
Confirm that loading spill valve button working properly surely and manual confirmation become loading ratio spill valve button working properly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720079592.XU CN206409448U (en) | 2017-01-22 | 2017-01-22 | A kind of thermal power plant's coal pulverizer hydraulic oil system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720079592.XU CN206409448U (en) | 2017-01-22 | 2017-01-22 | A kind of thermal power plant's coal pulverizer hydraulic oil system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206409448U true CN206409448U (en) | 2017-08-15 |
Family
ID=59556297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720079592.XU Expired - Fee Related CN206409448U (en) | 2017-01-22 | 2017-01-22 | A kind of thermal power plant's coal pulverizer hydraulic oil system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206409448U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762875A (en) * | 2017-01-22 | 2017-05-31 | 华北电力科学研究院有限责任公司 | A kind of thermal power plant's coal pulverizer hydraulic oil system and its start-up and shut-down control method |
-
2017
- 2017-01-22 CN CN201720079592.XU patent/CN206409448U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762875A (en) * | 2017-01-22 | 2017-05-31 | 华北电力科学研究院有限责任公司 | A kind of thermal power plant's coal pulverizer hydraulic oil system and its start-up and shut-down control method |
| CN106762875B (en) * | 2017-01-22 | 2018-11-27 | 华北电力科学研究院有限责任公司 | A kind of thermal power plant's coal pulverizer hydraulic oil system and its start-up and shut-down control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104163385B (en) | A kind of winch hydraulic control system | |
| CN109737295A (en) | Intelligent compressor dilute oil lubrication station | |
| CN206409448U (en) | A kind of thermal power plant's coal pulverizer hydraulic oil system | |
| CN107013534B (en) | Aero-engine key component inertia friction welder fluid power system | |
| DE102016224661A1 (en) | Heating system and method for operating a heating system | |
| CN106088208A (en) | Excavator revolution hydraulic control system | |
| CN103573584A (en) | Compressed air heat energy recovery and control system | |
| CN106762875A (en) | A kind of thermal power plant's coal pulverizer hydraulic oil system and its start-up and shut-down control method | |
| CN106151135B (en) | A kind of concrete pumping hydraulic control system and concrete pumping machinery | |
| CN105114687B (en) | A kind of more hydraulic butterfly valves open and close control hydraulic control system | |
| CN206174035U (en) | Water circulating system of thermal power plant | |
| CN106120954A (en) | Thermal power plant's water circulation system | |
| CN208059166U (en) | A kind of constant pressure arrangement for air conditioner water circulating system | |
| CN206152449U (en) | Anti fuel oil system of thermal power plant's high pressure | |
| CN205505183U (en) | Two water tank structure's water supply system | |
| CN110966273B (en) | Intelligent coal vertical mill single-pump bidirectional loading hydraulic system | |
| CN106196226A (en) | Tall building direct connection heating energy conserving system | |
| CN206830552U (en) | Supercharging Servocontrol device on superposing type force standard machine | |
| CN102632553B (en) | Additive supply system of building material preparation device | |
| CN207261371U (en) | Aero-engine key component inertia friction welder fluid power system | |
| CN219433827U (en) | Cooling water temperature control and circulation system | |
| CN218864301U (en) | Clean low-carbon heating device capable of utilizing geothermal energy in multiple stages | |
| CN204456120U (en) | Mortar leakage prevention cycle intelligent slurrying mud jacking system | |
| CN210740506U (en) | Heat exchange unit | |
| CN217463406U (en) | Valve well photovoltaic electro-hydraulic remote control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20170815 |