CN202597249U - Pump cover for PCS (Process Control System) recycling pump - Google Patents
Pump cover for PCS (Process Control System) recycling pump Download PDFInfo
- Publication number
- CN202597249U CN202597249U CN 201220118686 CN201220118686U CN202597249U CN 202597249 U CN202597249 U CN 202597249U CN 201220118686 CN201220118686 CN 201220118686 CN 201220118686 U CN201220118686 U CN 201220118686U CN 202597249 U CN202597249 U CN 202597249U
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- CN
- China
- Prior art keywords
- pump cover
- pump
- hole
- pcs
- cooling
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a pump cover for a PCS (Process Control System) recycling pump. According to the pump cover, two axial ends of the pump cover are respectively the first end face and the second end face; an axial through hole axially passing through the pump cover is arranged at the centre of the pump cover; and moreover, a cooling through hole is formed in the pump cover, with the first end positioned on the first end face; and the second end of the cooling through hole is positioned on the wall of the axial through hole. The pump cover has the technical effects that the cooling through hole is arranged in the pump cover, thereof, the water in a pumping chamber can be introduced into a mechanical sealing chamber for flushing the mechanical seal so as to reduce the temperature of the upper seal end face of the mechanical seal, and the stable operation of the PCS recycling pump can be ensured.
Description
Technical field
The utility model relates to the pump cover of a kind of PCS of being used for recirculating pump in nuclear power equipment field.
Background technique
The PCS recirculating pump is to be used in a kind of recirculating pump that often uses in the pcs system of nuclear power station; Pcs system is also referred to as and is non-passive safety shell cooling system; The effect of this system is: when coolant loss (LOCA) or main steam pipe cut (MSLB) accident take place, derive heat in the safety in containment, reduce the temperature and pressure of containment; Reduce the pressure reduction of containment atmosphere and external environment condition, the release of radioactive material after the restriction accident.Also as the nourishment source in spentnuclear fuel pond, the pcs system critical piece comprises PCS: non-passive safety shell cooling water container (PCCWST), air deflection plate (airbaffle), air inlet and air outlet slit, water distribution system.In addition, also have the auxiliary water storage tank (PCCAWST) of non-passive safety shell cooling and two PCS recirculating pumps, use the PCS recirculating pump to pcs system extra cooling water to be provided at the scene, can also the reserve moisturizing be provided for the antidetonation water tower of fire-fighting system from PCCAWST.
Because the PCS recirculating pump is mounted in the AP1000 system module, so its size is restricted.On the PCS recirculating pump; The mechanical seal of said pump cover and said PCS recirculating pump all is socketed on the pump shaft of said PCS recirculating pump; First end face of said pump cover is towards pumping chamber; Second end face of said pump cover forms sealed chamber towards the mechanical seal of said PCS recirculating pump between said pump cover and the said mechanical seal.At said PCS in recycle pump; The seal face of said mechanical seal must cool off because frictional heat, and traditional cooling chamber that on said pump cover, is provided with; Cooling line need be set; Utilize external cooling water or pumped medium that said sealed chamber is cooled off, such technological scheme has increased the volume of said PCS recirculating pump, so and is not suitable on the PCS recirculating pump.
The model utility content
The purpose of the utility model is in order to overcome the deficiency of existing technology, a kind of pump cover of the PCS of being used for recirculating pump to be provided, the technical problem that its mechanical sealing surface that can solve the PCS recirculating pump can't cool off.
A kind of technological scheme that realizes above-mentioned purpose is:. a kind of pump cover of the PCS of being used for recirculating pump; The axial two ends of said pump cover are respectively first end face and second end face; The center of said pump cover is provided with the axial hole that axially runs through said pump cover; Also have the cooling through hole on the said pump cover, the first end of said cooling through hole is positioned on said first end face, and the second end of said cooling through hole is positioned on the hole wall of said axial hole.
Further, the level height of said cooling through hole first end is higher than the level height of said cooling through hole the second end.
Adopted the technological scheme of pump cover of a kind of PCS of being used for recirculating pump of the utility model, the technological scheme of cooling through hole promptly has been set on said pump cover.Its technique effect is: through the cooling through hole is set on said pump cover; Water in the said pumping chamber is introduced said mechanical seal chamber; Wash the seal face of said mechanical seal, reduce the temperature of the seal face of said mechanical seal, guarantee the stable operation of PCS recirculating pump.
Description of drawings
Fig. 1 is a kind of structural representation that is used for the pump cover of PCS recirculating pump of the utility model.
Fig. 2 is a kind of scheme of installation that is used for the pump cover of PCS recirculating pump of the utility model.
Embodiment
See also Fig. 1 and Fig. 2, the utility model 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, a kind of pump cover that is used for the PCS recirculating pump of the utility model, the axial two ends of said pump cover 1 are respectively first end face 11 and second end face 12, the center of said pump cover is provided with the axial hole 13 that axially runs through said pump cover 1; Through said axial hole 13; Said pump cover 1 is socketed on the pump shaft of said PCS recirculating pump through said axial hole 13: also have cooling through hole 14 on the said pump cover 1; The first end of said cooling through hole 14 is positioned on said first end face 11, and the second end of said cooling through hole 14 is positioned on the hole wall of said axial hole 13.
See also Fig. 2; A kind of pump cover that is used for the PCS recirculating pump of the utility model; The mechanical seal 2 of said pump cover 1 and said PCS recirculating pump all is socketed on the pump shaft 3 of said PCS recirculating pump, and said first end face 11 of said pump cover 1 is towards pumping chamber 4, and said second end face 12 of said pump cover 1 is towards the mechanical seal chamber 5 of said PCS recirculating pump; The chamber that forms between said pump cover 1 and the said mechanical seal 2 is exactly described mechanical seal chamber 5; Through cooling through hole 14 is set on said pump cover 1, the water in the said pumping chamber 4 is introduced said mechanical seal chamber 5, wash the seal face of said mechanical seal 2; Reduce the temperature of the seal face of said mechanical seal 2, guarantee the stable operation of PCS recirculating pump.
Said cooling hole 11 is arranged at the top of said end cap 1; Must make the level height of said cooling through hole 14 first ends be higher than the level height of said cooling through hole 14 the second ends like this, the purpose that is provided with like this is to help the air emptying with in the said mechanical seal chamber 5.
Those of ordinary skill in the art will be appreciated that; Above embodiment is used for explaining the utility model; And be not the qualification that is used as 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. pump cover that is used for the PCS recirculating pump; The axial two ends of said pump cover (1) are respectively first end face (11) and second end face (12); The center of said pump cover is provided with the axial hole (13) that axially runs through said pump cover (1); It is characterized in that: also have cooling through hole (14) on the said pump cover (1), the first end of said cooling through hole (14) is positioned on said first end face (11), and the second end of said cooling through hole (14) is positioned on the hole wall of said axial hole (13).
2. a kind of pump cover that is used for the PCS recirculating pump according to claim 1 is characterized in that: the level height of said cooling through hole (14) first end is higher than the level height of said cooling through hole (14) the second end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220118686 CN202597249U (en) | 2012-03-27 | 2012-03-27 | Pump cover for PCS (Process Control System) recycling pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220118686 CN202597249U (en) | 2012-03-27 | 2012-03-27 | Pump cover for PCS (Process Control System) recycling pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202597249U true CN202597249U (en) | 2012-12-12 |
Family
ID=47314796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220118686 Expired - Lifetime CN202597249U (en) | 2012-03-27 | 2012-03-27 | Pump cover for PCS (Process Control System) recycling pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202597249U (en) |
-
2012
- 2012-03-27 CN CN 201220118686 patent/CN202597249U/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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121212 |