CN109798804A - A kind of guide bearing cooler back-flushing method - Google Patents
A kind of guide bearing cooler back-flushing method Download PDFInfo
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- CN109798804A CN109798804A CN201811578961.5A CN201811578961A CN109798804A CN 109798804 A CN109798804 A CN 109798804A CN 201811578961 A CN201811578961 A CN 201811578961A CN 109798804 A CN109798804 A CN 109798804A
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- guide bearing
- valve
- bearing cooler
- water
- proximal end
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Abstract
The present invention relates to guide bearing cooler protection technique fields; especially a kind of guide bearing cooler back-flushing method is switching guide bearing cooler water inlet and water outlet connecting pipe, so that cooling water is entered guide bearing cooler from water outlet, leaves guide bearing cooler from water inlet.It can realize in the state of keeping water flowing to the online backflushing of guide bearing cooler, avoid guide bearing cooler in back flushing process because of security risk caused by water shortage, without shutting down the recoil that can be realized to bearing cooler.
Description
Technical field
The present invention relates to guide bearing cooler protection technique field, especially a kind of guide bearing cooler back-flushing method.
Background technique
Guide bearing cooler is to enter cooler using water and need to carry out cooling oil to carry out heat exchange in cooler,
To realize the cooling to oil.In hydroelectric generation, guide bearing cooler is for cooling down water wheel motor guide bearing cooling oil.But
In the long-term use, cooler pipeline is easy fouling, will lead to the reduction of supply and discharge water pipe caliber after fouling, thus supply and discharge water pipe
Flow is reduced.So as to cause cooling effect variation.It is chronically at high limit operation so as to cause water wheel motor guide bearing temperature, gives machine
The safe and stable operation of group brings very big security risk.
When unit watt temperature, oil temperature generally increase, compressed air need to be used to purge guide bearing cooler, just can guarantee
Unit watt temperature is in control range；Meanwhile guide bearing cooler will cause and lead in purge using compressed air
The of short duration water shortage of bearing cooler, causes Wa Wen, oil temperature to increase, easily causes burning accident, there are severe compromises.Cause
When this at this stage purges guide bearing cooler, generally require to shut down progress.
Summary of the invention
The purpose of the present invention is to provide a kind of guide bearing cooler back-flushing methods, can not turn off the situation into water
The lower online backwashing for realizing guide bearing cooler.
Purpose to realize the present invention, the technical solution used is a kind of guide bearing cooler back-flushing method is to generate electricity
When normal operation, switching guide bearing cooler water inlet and water outlet connecting pipe make cooling water enter guide bearing from water outlet
Cooler leaves guide bearing cooler from water inlet.
Further, cooling water enters guide bearing cooler with compressed air.
Preferably, opening backwash after the appearance of one of following situations:
1) when guide bearing cooler discharge pressure is greater than setting backwash discharge pressure；
2) when watt temperature is higher than setting backwash temperature；
3) operation is higher than setting back-flushing operation number of days.
Further, the described backwash discharge pressure that sets is 0.2MPa.
Further, the described backwash temperature that sets is 54 DEG C.
Further, described to set back-flushing operation number of days as 30 days.
Preferably, the switching guide bearing cooler water inlet and water outlet connecting pipe use electrical control.
Further, the guide bearing cooler back-flushing method is implemented using guide bearing back purge system, and described leads
Bearing cooler back purge system, including intaking along the distal end that guide bearing cooler water (flow) direction is successively installed on water inlet pipe
Valve, proximal end inlet valve and the proximal end outlet valve successively installed on outlet pipe, distal end outlet valve, it is the distal end inlet valve, close
End inlet valve, proximal end outlet valve, distal end outlet valve are all made of two position three way directional control valve, the distal end inlet valve by reversely into
Water pipe connects proximal end outlet valve, and the proximal end inlet valve connects distal end outlet valve by reversed outlet pipe.
The guide bearing cooler back purge system is integral combination valve, and the entire combination valve includes combination valve
Body and the distal end inlet valve being arranged on combinaing valve body, proximal end inlet valve, distal end outlet valve, proximal end outlet valve and each valve body of connection
Between reversed water inlet pipe, reversed outlet pipe, water inlet pipe, outlet pipe.
Further, the reversed water inlet pipe connects compressed gas source by tracheae.Compression can be accessed simultaneously in recoil
Air makes compressed air and water collective effect recoil, and promotes recoil cleaning effect.
Preferably, being provided on the tracheae by the check valve on compressed gas source to reversed water inlet pipe.It can be effective
Water flow is avoided to enter tracheae.
Preferably, being provided with safety valve on the tracheae, safety valve set pressure is technical water supply highest work pressure
Power.Effective protection guide bearing cooler and a valve, avoid hypertonia.
Further, the safety valve is arranged between check valve and compressed gas source.
Further, the three-way diverter valve uses Electromagnetic Control, preferably, the check valve uses Electromagnetic Control.
Further, it is provided with controller and the distal end inlet valve, proximal end inlet valve, proximal end outlet valve, distal end is discharged
Valve, the connection of unidirectional valve signal.The automatic switchover that conventional line and the route that recoils can be effectively realized by controller is reduced artificial
Operation.
Using guide bearing cooler back-flushing method of the present invention, the cooling of guide bearing cooler can be effectively ensured
Efficiency, and be during the backwash process not in guide bearing cooler water shortage status, to effectively avoid in backwash process watt
Temperature increases, and can be realized without shutting down.
Detailed description of the invention
Fig. 1 is the structural schematic diagram after a kind of guide bearing cooler back purge system installation provided by the invention.
Specific embodiment
The present invention is described in further detail below by specific implementation example and in conjunction with Fig. 1.
Embodiment 1: certain power plant is provided with multiple guide bearing temperature detector measuring points, when certain test point detects that watt temperature is higher than 54 DEG C
Afterwards, to guide bearing cooler 3 backwash, back-flushing method be generator operate normally, switch 3 water inlet of guide bearing cooler and
Water outlet connecting pipe makes cooling water enter guide bearing cooler from water outlet, leaves guide bearing cooler 3 from water inlet, cold
But water enters guide bearing cooler 3 with compressed air.
3 water inlet of switching guide bearing cooler and water outlet connecting pipe use electrical control.
The guide bearing cooler back-flushing method is implemented using guide bearing back purge system, the guide bearing cooler
Back purge system, including successively installed on water inlet pipe 1 along 3 water (flow) direction of guide bearing cooler distal end inlet valve 4, proximal end into
Water valve 5 and the proximal end outlet valve 6 successively installed on outlet pipe 2, distal end outlet valve 7, the distal end inlet valve 4, proximal end into
Water valve 5, proximal end outlet valve 6, distal end outlet valve 7 are all made of two position three way directional control valve, the distal end inlet valve 4 by reversely into
Water pipe 10 connects proximal end outlet valve 6, and the proximal end inlet valve 5 connects distal end outlet valve 7 by reversed outlet pipe 11.
The guide bearing cooler back purge system is integral combination valve, and the entire combination valve includes combination valve
Body and the distal end inlet valve 4 being arranged on combinaing valve body, proximal end inlet valve 5, distal end outlet valve 7, proximal end outlet valve 6 and connection are each
Reversed water inlet pipe 10, reversed outlet pipe 11, water inlet pipe 1, outlet pipe 2 between valve body.
The reversed water inlet pipe 10 connects compressed gas source 9 by tracheae 8.
It is provided on the tracheae 8 by the check valve 12 on compressed gas source 9 to reversed water inlet pipe 10.
Safety valve 13 is provided on the tracheae 8,13 set-pressure of safety valve is 0.6MPa.
The safety valve 13 is arranged between check valve 12 and compressed gas source 9.
The two position three way directional control valve and check valve 12 uses Electromagnetic Control.
Be provided with controller and the distal end inlet valve 4, proximal end inlet valve 5, proximal end outlet valve 6, distal end outlet valve 7,
The connection of 12 signal of check valve.
Backwash front and back monitoring point watt temperature is as follows:
| Measuring point | Temperature (DEG C) before backwashing | Temperature (DEG C) after backwash | The temperature difference (DEG C) |
| 1 | 49.53 | 42.28 | 7.25 |
| 2 | 50.18 | 43.10 | 7.08 |
| 3 | 52.93 | 45.97 | 6.96 |
| 4 | 54.13 | 47.46 | 6.67 |
| 5 | 50.45 | 43.37 | 7.08 |
| 6 | 51.43 | 44.69 | 6.74 |
| 7 | 49.88 | 42.75 | 7.13 |
| 8 | 49.53 | 42.51 | 7.02 |
It can effectively be removed after method described herein backwashes guide bearing cooler as seen from the above table
Sundries in guide bearing cooler guarantees the cooling efficiency of guide bearing cooler, while scale removal process generator is just producing operation.
Embodiment 2: a kind of 3 back-flushing method of guide bearing cooler be generate electricity operate normally when, switching guide bearing is cooling
3 water inlet of device and water outlet connecting pipe, make cooling water enter guide bearing cooler 3 from water outlet, leave guide shaft from water inlet
Cooler 3 is held, cooling water enters guide bearing cooler 3 with compressed air.
Backwash is opened after following situations appearance, when 3 discharge pressure of guide bearing cooler is greater than setting backwash draining
Pressure, described sets backwash discharge pressure as 0.2MPa.
3 water inlet of switching guide bearing cooler and water outlet connecting pipe use electrical control.
Embodiment 3: a kind of 3 back-flushing method of guide bearing cooler be generate electricity operate normally when, switching guide bearing is cooling
3 water inlet of device and water outlet connecting pipe, make cooling water enter guide bearing cooler 3 from water outlet, leave guide shaft from water inlet
Hold cooler 3.
Backwash is opened after days running is higher than 30 days.
Embodiment 4: a kind of 3 back-flushing method of guide bearing cooler uses cooling with lower guide bearing as described in Example 2
Device back purge system carry out, including successively installed on water inlet pipe 1 along 3 water (flow) direction of guide bearing cooler distal end inlet valve 4,
Proximal end inlet valve 5 and the proximal end outlet valve 6 successively installed on outlet pipe 2, distal end outlet valve 7, the distal end inlet valve 4,
Proximal end inlet valve 5, proximal end outlet valve 6, distal end outlet valve 7 are all made of two position three way directional control valve, and the distal end inlet valve 4 passes through
Reversed water inlet pipe 10 connects proximal end outlet valve 6, and the proximal end inlet valve 5 connects distal end outlet valve 7 by reversed outlet pipe 11.
The guide bearing cooler back purge system is integral combination valve, and the entire combination valve includes combination valve
Body and the distal end inlet valve 4 being arranged on combinaing valve body, proximal end inlet valve 5, distal end outlet valve 7, proximal end outlet valve 6 and connection are each
Reversed water inlet pipe 10, reversed outlet pipe 11, water inlet pipe 1, outlet pipe 2 between valve body.
The reversed water inlet pipe 10 connects compressed gas source 9 by tracheae 8.
It is provided on the tracheae 8 by the check valve 12 on compressed gas source 9 to reversed water inlet pipe 10.
Safety valve 13 is provided on the tracheae 8,13 set-pressure of safety valve is technical water supply maximum working pressure.
Embodiment 5: a kind of 3 back-flushing method of guide bearing cooler uses cooling with lower guide bearing as described in Example 3
Device back purge system carries out, and the guide bearing cooler back purge system includes intaking along 3 water (flow) direction of guide bearing cooler
Distal end inlet valve 4, proximal end inlet valve 5 and the proximal end outlet valve 6 successively installed on outlet pipe 2 successively installed on pipe 1, distal end
Outlet valve 7, the distal end inlet valve 4, proximal end inlet valve 5, proximal end outlet valve 6, distal end outlet valve 7 are all made of two-position three way and change
To valve, the distal end inlet valve 4 connects proximal end outlet valve 6 by reversed water inlet pipe 10, and the proximal end inlet valve 5 passes through anti-
Distal end outlet valve 7 is connected to outlet pipe 11.
The two position three way directional control valve uses Electromagnetic Control.
It is provided with controller and the distal end inlet valve 4, proximal end inlet valve 5, proximal end outlet valve 6, distal end outlet valve 7 connects
It connects.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, there can be various modifications and variations in the spirit and principles in the present invention, these equivalent variation or replacement etc.,
It is all included in the scope of protection of the present invention.
Claims (10)
1. a kind of guide bearing cooler back-flushing method, it is characterised in that: for when generator operates normally, switching guide bearing is cold
But device water inlet and water outlet connecting pipe, make cooling water enter guide bearing cooler from water outlet.
2. a kind of guide bearing cooler back-flushing method according to claim 1, it is characterised in that: cooling water is with compression
Air enters guide bearing cooler.
3. a kind of guide bearing cooler back-flushing method according to claim 1 or 2, which is characterized in that in following situations
One of occur after open backwash:
1) when guide bearing cooler discharge pressure is greater than setting backwash discharge pressure；
2) when watt temperature is higher than setting backwash temperature；
3) operation is higher than setting back-flushing operation number of days.
4. a kind of guide bearing cooler back-flushing method according to claim 3, it is characterised in that: the setting recoil
Washing discharge pressure is 0.2MPa, and described sets backwash temperature as 54 DEG C, and described set back-flushing operation number of days as 30 days.
5. a kind of guide bearing cooler back-flushing method according to claim 1, it is characterised in that: the switching guide bearing
Cooler water inlet and water outlet connecting pipe use electrical control.
6. a kind of guide bearing cooler back-flushing method according to claim 1, it is characterised in that: recoiled using guide bearing
Cleaning device is implemented, the guide bearing cooler back purge system, including along guide bearing cooler water (flow) direction on water inlet pipe
Distal end inlet valve, proximal end inlet valve and the proximal end outlet valve successively installed on outlet pipe, distal end outlet valve successively installed, institute
Distal end inlet valve, proximal end inlet valve, proximal end outlet valve, the distal end outlet valve stated are all made of two position three way directional control valve, and described is remote
Inlet valve is held to connect proximal end outlet valve by reversed water inlet pipe, the proximal end inlet valve is gone out by reversed outlet pipe connection distal end
Water valve.
7. a kind of guide bearing cooler back-flushing method according to claim 6, it is characterised in that: the guide bearing is cold
But device back purge system is integral combination valve, and the entire combination valve includes combinaing valve body and is arranged on combinaing valve body
It is reversed water inlet pipe between distal end inlet valve, proximal end inlet valve, distal end outlet valve, proximal end outlet valve and each valve body of connection, reversed
Outlet pipe, water inlet pipe, outlet pipe.
8. a kind of guide bearing cooler back-flushing method according to claim 6 or 7, it is characterised in that: described is reversed
Water inlet pipe connects compressed gas source by tracheae.
9. a kind of guide bearing cooler back-flushing method according to claim 8, it is characterised in that: set on the tracheae
It is equipped with by the check valve on compressed gas source to reversed water inlet pipe.
10. a kind of guide bearing cooler back-flushing method according to claim 9, it is characterised in that: on the tracheae
It is provided with safety valve, safety valve set pressure is technical water supply maximum working pressure.
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| CN201811578961.5A CN109798804A (en) | 2018-12-24 | 2018-12-24 | A kind of guide bearing cooler back-flushing method |
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| CN201811578961.5A CN109798804A (en) | 2018-12-24 | 2018-12-24 | A kind of guide bearing cooler back-flushing method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112129160A (en) * | 2019-06-24 | 2020-12-25 | 上海梅山钢铁股份有限公司 | Online circulation cleaning device of heat exchanger |
| CN112378287A (en) * | 2020-11-16 | 2021-02-19 | 中国石油天然气集团有限公司 | Hot washing device for heat exchanger containing oil medium |
| CN113073712A (en) * | 2021-03-05 | 2021-07-06 | 中国电建集团华东勘测设计研究院有限公司 | Hydropower station cooling water supply system with tail water cooler cleaning function |
| CN113123409A (en) * | 2021-03-05 | 2021-07-16 | 中国电建集团华东勘测设计研究院有限公司 | Hydropower station cooling water supply system with tail water cooler purging function |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112129160A (en) * | 2019-06-24 | 2020-12-25 | 上海梅山钢铁股份有限公司 | Online circulation cleaning device of heat exchanger |
| CN112378287A (en) * | 2020-11-16 | 2021-02-19 | 中国石油天然气集团有限公司 | Hot washing device for heat exchanger containing oil medium |
| CN113073712A (en) * | 2021-03-05 | 2021-07-06 | 中国电建集团华东勘测设计研究院有限公司 | Hydropower station cooling water supply system with tail water cooler cleaning function |
| CN113123409A (en) * | 2021-03-05 | 2021-07-16 | 中国电建集团华东勘测设计研究院有限公司 | Hydropower station cooling water supply system with tail water cooler purging function |
| CN113073712B (en) * | 2021-03-05 | 2022-04-22 | 中国电建集团华东勘测设计研究院有限公司 | Hydropower station cooling water supply system with tail water cooler cleaning function |
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Application publication date: 20190524 |