CN202597275U - Flushing pipeline for mechanical seal of cooling agent drain tank pump - Google Patents
Flushing pipeline for mechanical seal of cooling agent drain tank pump Download PDFInfo
- Publication number
- CN202597275U CN202597275U CN 201220118932 CN201220118932U CN202597275U CN 202597275 U CN202597275 U CN 202597275U CN 201220118932 CN201220118932 CN 201220118932 CN 201220118932 U CN201220118932 U CN 201220118932U CN 202597275 U CN202597275 U CN 202597275U
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- China
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- machine sealing
- flow path
- mechanical seal
- chamber body
- sealing chamber
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- Expired - Lifetime
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Abstract
The utility model discloses a flushing pipeline for a mechanical seal of a cooling agent drain tank pump, which comprises a flushing pipe and a water outlet pipe, wherein the flushing pipe is connected with a machine sealing cavity body, the two ends of the water outlet pipe are respectively connected with the flushing pipe and a pressurized water chamber in a pump body, an injection flow path and a drainage flow path are arranged in the machine sealing cavity body and are provided with flushing water, a water inlet of the injection flow path is positioned on the outer circumferential face of the machine sealing cavity body, a water outlet of the injection flow path is positioned under the inner circumferential face of the machine sealing cavity body, the water outlet is connected with the water inlet of the injection flow path, a drainage hole of the drainage flow path is positioned on the inner circumferential face of the machine sealing cavity body, and a water return hole of the drainage flow path is positioned on the lower end face of the machine sealing cavity body. By the flushing pipe, the structure of a pump set can be simplified, and the machine seal can be cooled and flushed to the greatest extent.
Description
Technical field
The utility model relates to a kind of reactor with freezing mixture drain tank pump, is specifically related to a kind of flushing line that is used for the mechanical seal of freezing mixture drain tank pump.
Background technique
The function of reactor coolant drain tank pump (abbreviation main pump) is to make freezing mixture form forced circulation, thereby is sent to steam generator to the heat energy that produces in the reactor, to produce steam, the driving steam turbine acting.Basic demand to it is:
1) can under the unmanned maintenance condition, work safely and reliably for a long time; Be convenient to maintenance, auxiliary system is simple;
2) Runner assembly should be able to provide enough rotary inertias, so that under the station blackout situation, utilizes the running down of main pump that enough flows are provided, and makes reactor core obtain suitable cooling;
3) to lack with the leakage rate of radioactive freezing mixture.
Usually the reactor coolant drain tank pump adopts little, the reliable sealing mechanical seal of leakage rate; The purpose of the flushing of mechanical seal is to prevent the impurity aggregation, prevents that air bag from forming, and keeps and improves the lubricated etc. of mechanical sealing surface; When irrigating fluid temperature is low, have cooling action concurrently.The outer flushing pipeline that existing reactor coolant drain tank pump adopts makes pump structure huge, and receives extraneous condition influence big.
Summary of the invention
The purpose of the utility model is in order to overcome the deficiency of existing technology, a kind of flushing line that is used for the mechanical seal of freezing mixture drain tank pump to be provided, and it can simplify the structure of pump group, and can make mechanical seal farthest cooled off and wash.
The technological scheme that realizes above-mentioned purpose is: a kind of flushing line that is used for the mechanical seal of freezing mixture drain tank pump; Comprise the cleaning hose that is connected with the machine sealing chamber body and two ends respectively with the cleaning hose and the pump housing in the outlet pipe that is connected of pumping chamber; Wherein, be provided with the injection stream and discharge stream of sparge water in the said machine sealing chamber body;
The water inlet of said injection stream is positioned at the top of the outer circumferential face of machine sealing chamber body, and the water outlet that injects stream is positioned at the bottom of said machine sealing chamber body inner peripheral surface, and said outlet pipe is connected with the water inlet of said injection stream;
The drain opening of said discharge stream is positioned at the top of the inner peripheral surface of said machine sealing chamber body, and the backwater mouth of discharging stream is positioned on the lower end surface of said machine sealing chamber body.
The flushing line of the above-mentioned mechanical seal that is used for freezing mixture drain tank pump, wherein, said cleaning hose is a fin tube.
The technological scheme of the flushing line of the mechanical seal that is used for freezing mixture drain tank pump of the utility model adopts from flushing, penetration type flushing scheme.Promptly introduce the sparge water of mechanical seal from the pumping chamber of pump, in the water inlet of the bottom of mechanical seal, the top water outlet can make mechanical seal washed fully and cool off.More make pump group structure simpler, reduce the influence of external uncertain factor.
Description of drawings
Fig. 1 is the flushing line structural representation of the mechanical seal that is used for freezing mixture drain tank pump of the utility model.
Embodiment
In order to understand the technological scheme of the utility model better, below through embodiment particularly and combine accompanying drawing at length to explain:
See also Fig. 1, the flushing line of the mechanical seal that is used for freezing mixture drain tank pump of the utility model comprises an outlet pipe 1, a cleaning hose 2 and is located at the injection stream 4 of the sparge water in the machine sealing chamber body 3 and discharges stream 5, wherein:
One end of outlet pipe 1 is connected with the interior pumping chamber of the pump housing, and the other end is connected on the base plate 10 through flange;
One end of cleaning hose 2 is connected with outlet pipe 1 on the base plate 10 through flange, and the other end is connected with the water inlet 41 of the injection stream 4 of machine sealing chamber body 3;
The water inlet 41 that injects stream 4 is positioned at the top of the outer circumferential face of machine sealing chamber body 3, and the water outlet 42 that injects stream is positioned at the bottom of machine sealing chamber body 3 inner peripheral surfaces;
The drain opening 51 of discharging stream 5 is positioned at the top of the inner peripheral surface of machine sealing chamber body 3, and the backwater mouth 52 of discharging stream 5 is positioned on the lower end surface of machine sealing chamber body 3.
The mechanical seal of freezing mixture drain tank pump adopts PLAN11 from the flushing scheme, from delivery side of pump introduction machine envelope sparge water, and in bottom's water inlet of machine sealing chamber body, the top water outlet, this can make mechanical seal washed fully and cool off.Because this pump fed sheet of a media temperature is 10 ℃～121.1 ℃, the cleaning hose 2 in the flushing line adopts fin tube, can effectively increase heat diffusion area in addition.Backwater mouth 52 is positioned on the lower end surface of machine sealing chamber body 3 and can be communicated with connecting tube 6, and sparge water is flowed back in the jar, efficiently solves the sealing difficulty of bringing because of external flushing line.
Those of ordinary skill in the art will be appreciated that; Above embodiment is used for explaining the utility model; And be not with the qualification of doing the utility model; As long as in the connotation scope of the utility model, all will drop in claims scope of the utility model the above embodiment's variation, modification.
Claims (2)
1. flushing line that is used for the mechanical seal of freezing mixture drain tank pump; Comprise the cleaning hose that is connected with the machine sealing chamber body and two ends respectively with the cleaning hose and the pump housing in the outlet pipe that is connected of pumping chamber; It is characterized in that, be provided with the injection stream and discharge stream of sparge water in the said machine sealing chamber body;
The water inlet of said injection stream is positioned at the top of the outer circumferential face of machine sealing chamber body, and the water outlet that injects stream is positioned at the bottom of said machine sealing chamber body inner peripheral surface, and said outlet pipe is connected with the water inlet of said injection stream;
The drain opening of said discharge stream is positioned at the top of the inner peripheral surface of said machine sealing chamber body, and the backwater mouth of discharging stream is positioned on the lower end surface of said machine sealing chamber body.
2. the flushing line that is used for the mechanical seal of freezing mixture drain tank pump according to claim 1 is characterized in that said cleaning hose is a fin tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220118932 CN202597275U (en) | 2012-03-27 | 2012-03-27 | Flushing pipeline for mechanical seal of cooling agent drain tank pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220118932 CN202597275U (en) | 2012-03-27 | 2012-03-27 | Flushing pipeline for mechanical seal of cooling agent drain tank pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202597275U true CN202597275U (en) | 2012-12-12 |
Family
ID=47314822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220118932 Expired - Lifetime CN202597275U (en) | 2012-03-27 | 2012-03-27 | Flushing pipeline for mechanical seal of cooling agent drain tank pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202597275U (en) |
-
2012
- 2012-03-27 CN CN 201220118932 patent/CN202597275U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121212 |
|
| CX01 | Expiry of patent term |