CN203835784U - Machine halt sealing device of nuclear power unit concrete volute pump - Google Patents
Machine halt sealing device of nuclear power unit concrete volute pump Download PDFInfo
- Publication number
- CN203835784U CN203835784U CN201420102179.7U CN201420102179U CN203835784U CN 203835784 U CN203835784 U CN 203835784U CN 201420102179 U CN201420102179 U CN 201420102179U CN 203835784 U CN203835784 U CN 203835784U
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- China
- Prior art keywords
- pump
- sealing device
- nuclear power
- pressure bladder
- spiral casing
- 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 - Lifetime
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 22
- 239000000463 material Substances 0.000 abstract description 5
- 238000011144 upstream manufacturing Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 description 9
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 210000004712 air sac Anatomy 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model belongs to a structural design of a hydraulic mechanical device, and particularly relates to a machine halt sealing device of a nuclear power unit concrete volute pump. The machine halt sealing device comprises sealing air bags arranged at the periphery of a pump shaft above a pump cover of the nuclear power unit concrete volute pump, and the sealing air bags are fixed to the pump cover through supporting frames and connected with compressed air pipelines. According to the machine halt sealing device, when the concrete volute pump needs to be checked and maintained, the sealing air bags are used to prevent water from entering, and an upstream flow channel of the pump does not need to be drained; the sealing air bags are designed to be of sectioned structures, rubber materials are adopted, and installation can be achieved just through bonding, and the machine halt sealing device is simple and easy to operate.
Description
Technical field
The utility model belongs to the structural design of hydraulic mechanical equipment, is specifically related to a kind of shutdown sealing device of nuclear power generating sets concrete spiral casing pump.
Background technique
Nuclear power plant's concrete spiral casing pump is that the capital equipment of cooling water is provided for steam turbine factory building, and nuclear power plant is generated electricity at full capacity and plays vital effect, and can it steady in a long-termly move the economic benefit that directly affects nuclear power plant.
Nuclear power plant's concrete spiral casing pump water inlet runner is connected with water inlet open channel or intake tunnel, although be provided with bulkhead gate in pump house inlet channel, but in the runner between water pump upstream and bulkhead gate, still there is large water gaging, wanting emptying water pump is overhauled of this part water is a no small engineering, need to consume a large amount of manpower and materials.In order to pursue the economic benefit of lower cost of production and Geng Gao, nuclear power plant wishes to shorten equipment repair and maintenance time and power plant's overhaul time as far as possible, with raising equipment, exerts oneself.
Concrete spiral casing pump is a main equipment, comprises motor, gear-box, pump housing three parts, and the widgets of pump group is countless.Just, because it is bulky, parts are various, pump group breaks down needs the probability of maintenance also corresponding higher.In order to shorten the repair time as far as possible; maintenance condition is simplified; can consider that pump shaft arranges seal arrangement around above water pump cover; for during termination of pumping maintenance work, water pump is sealed; it is stop sealing; so just can, in the not emptying situation of water pump upstream canal, guarantee that current do not enter pump cover top, thereby realize the maintenance to concrete spiral casing pump.
Model utility content
The purpose of this utility model is to provide a kind of shutdown sealing device of nuclear power generating sets concrete spiral casing pump, in the situation that the runner internal water accumulation between not emptying water pump upstream and bulkhead gate during maintenance work seals water pump.
The technical solution of the utility model is as follows: a kind of shutdown sealing device of nuclear power generating sets concrete spiral casing pump; comprise and be arranged on the axial pressure bladder of concrete spiral casing pump pump cover top pump; pressure bladder is fixed on pump cover by support frame, and described pressure bladder is connected with compressed air line.
Further, the shutdown sealing device of nuclear power generating sets concrete spiral casing pump as above, wherein, described pressure bladder has two, by support frame, independently arranges.
Further, the shutdown sealing device of nuclear power generating sets concrete spiral casing pump as above, wherein; described compressed air line comprises a house steward; house steward is provided with two branch roads, and each branch road is connected with a pressure bladder respectively, is respectively equipped with valve and pressure gauge on the pipeline of each branch road.
Further, the shutdown sealing device of nuclear power generating sets concrete spiral casing pump as above, wherein, described support frame is the assemblying body of many group seal rings and support ring.
The beneficial effects of the utility model are as follows: the utility model cuts off water inlet with pressure bladder when concrete spiral casing pump need to overhaul, needn't emptying water pump upstream canal; If one pressure bladder is damaged, as another standby road pressure bladder, still can carry out orderly closedown sealing function; If one pressure bladder is damaged, can independently change, needn't twice change together; Pressure bladder is designed to splitted structure, adopts rubber material, by bonding, can complete installation, simple.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment's structural representation;
Fig. 2 is pressure bladder and seal ring and support ring tangent plane enlarged view;
Fig. 3 is the structural representation of compressed air line.
In figure: 1. support frame (seal ring+support ring); 2. pump shaft; 3. axle sleeve; 4. pressure bladder (air shroud); 5,6. air sac sealing interface; 7. pump cover; 8. protecting jacket; 9. control valve; 10. pressure gauge; 11. pressure gauges and pressure switch; 12. outlet valves; 13. impellers; 14. support rings; 15. upper sealing rings; Seal ring in 16.; 17. lower sealing rings.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in detail.
Concrete spiral casing pump shutdown sealing device provided by the utility model is comprised of three seal rings (upper sealing ring 15, in seal ring 16, lower sealing ring 17) and assemblying body (support frame 1) and two pressure bladders 4 of support ring 14, as shown in Figure 2.Pressure bladder 4 also claims air shroud, by rubber material, is made; Support ring 14 had both shielded to pressure bladder, can prevent from again occurring seize phenomenon after pressure bladder from losing heart.Two pressure bladders and support frame are completely independent, standby each other, if a wherein breakage can independently be changed.The air feed of two seals air bag derives from a pneumatic manifold, is divided into two branch roads before air inlet capsule, and on each lateral, valving and pressure gauge are controlled monitoring respectively.
As shown in Figure 1, seal ring+support ring+pressure bladder forms complete shutdown sealing device, and the completely independently pressure bladder 4 of two-track tape support frame 1 is arranged on pump shaft 2 outsides, is bolted on the pump cover 7 of impeller 13 tops.Between shutdown sealing device and pump cover 7, will seal, pump shaft 2 is outer is provided with axle sleeve 3 and protecting jacket 8, between the protecting jacket 8 of shutdown sealing device and pump shaft, needs to keep certain interval.
Pressure bladder 4 is connected with air feed bypass line separately by air sac sealing interface 5,6.On each lateral, be respectively equipped with control valve 9, outlet valve 12 and pressure gauge and pressure switch 11, control valve 9 and pressure gauge 10 be also set on house steward, as shown in Figure 3.
Pressure bladder, as one of critical piece of stop sealing mechanism, should have following characteristic:
1) pressure bladder should bearing certain pressure, and its required force value of bearing should be determined according to water pump actual operating conditions;
2) pressure bladder should keep normal performance under the various working temperature conditions of water pump;
3) pressure bladder should have certain intensity, and the phenomenon that should not leak air;
4) material of pressure bladder should adapt with its working medium and working environment.
When concrete spiral casing pump is normally worked, the emptying of two seals air bags, the pressure gauge on inflation arm should have correct status and numerical value to show.Now the gap between shutdown sealing device and protecting jacket has water to exist.
Concrete spiral casing pump shuts down in the time of need to overhauling, and opens the valve of inflation on arm one pressure bladder wherein inflated.After airbag aeration acquires a certain degree, just the gap between shutdown sealing device and protecting jacket is cut off, current cannot pass through this gap, can not arrive pump cover top.The pressure gauge of now inflating on arm should have correct status and numerical value to show, at this moment possesses water pump maintenance condition.If gas-flow closure failure, the valve of opening on another road inflation arm is inflated backup seal air bag, creates water pump maintenance condition.
After maintenance finishes, the gas in pressure bladder is released, recover in the gap between shutdown sealing device and protecting jacket, and water pump also returns to normal working.
Stop sealing also may lose efficacy at water pump normal operation period, and roughly reason may be:
(1) pressure bladder damages;
(2) loading line valve state mistake causes the inflation of pressure bladder mistake;
(3) operator's misoperation causes mistake inflation.
For addressing these problems, on pressure bladder loading line, pressure switch is set, set alarming value, signal is transferred to master-control room, online detection to guarantee that pressure bladder can not inflated because of misoperation causes seize phenomenon to occur.
Obviously, those skilled in the art can carry out various changes and modification and not depart from spirit and scope of the present utility model the utility model.Like this, if of the present utility model these are revised and within modification belongs to the scope of the utility model claim and equivalent technology thereof, the utility model is also intended to comprise these changes and modification interior.
Claims (4)
1. the shutdown sealing device of a nuclear power generating sets concrete spiral casing pump; it is characterized in that: comprise and be arranged on the concrete spiral casing pump pump cover top axial pressure bladder of pump (4); it is upper that pressure bladder is fixed on pump cover (7) by support frame (1), and described pressure bladder (4) is connected with compressed air line.
2. the shutdown sealing device of nuclear power generating sets concrete spiral casing pump as claimed in claim 1, is characterized in that: described pressure bladder (4) has two, by support frame (1) is independent, arranges.
3. the shutdown sealing device of nuclear power generating sets concrete spiral casing pump as claimed in claim 2; it is characterized in that: described compressed air line comprises a house steward; house steward is provided with two branch roads; each branch road is connected with a pressure bladder respectively, is respectively equipped with valve (9) and pressure gauge (11) on the pipeline of each branch road.
4. the shutdown sealing device of the nuclear power generating sets concrete spiral casing pump as described in claim 1 or 2 or 3, is characterized in that: described support frame (1) is the assemblying body of many group seal rings and support ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420102179.7U CN203835784U (en) | 2014-03-07 | 2014-03-07 | Machine halt sealing device of nuclear power unit concrete volute pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420102179.7U CN203835784U (en) | 2014-03-07 | 2014-03-07 | Machine halt sealing device of nuclear power unit concrete volute pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203835784U true CN203835784U (en) | 2014-09-17 |
Family
ID=51513632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420102179.7U Expired - Lifetime CN203835784U (en) | 2014-03-07 | 2014-03-07 | Machine halt sealing device of nuclear power unit concrete volute pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203835784U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107620715A (en) * | 2017-10-16 | 2018-01-23 | 上海阿波罗机械股份有限公司 | The main cooling water pump of used in nuclear power station |
| CN108597631A (en) * | 2018-04-27 | 2018-09-28 | 三门核电有限公司 | A kind of water source partition method of nuclear power plant's Coolant Pump |
-
2014
- 2014-03-07 CN CN201420102179.7U patent/CN203835784U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107620715A (en) * | 2017-10-16 | 2018-01-23 | 上海阿波罗机械股份有限公司 | The main cooling water pump of used in nuclear power station |
| CN108597631A (en) * | 2018-04-27 | 2018-09-28 | 三门核电有限公司 | A kind of water source partition method of nuclear power plant's Coolant Pump |
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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: 20140917 |