CN205975686U - Circulating water concrete duct inspection manhole is arranged to eclipsed form - Google Patents
Circulating water concrete duct inspection manhole is arranged to eclipsed form Download PDFInfo
- Publication number
- CN205975686U CN205975686U CN201620923634.9U CN201620923634U CN205975686U CN 205975686 U CN205975686 U CN 205975686U CN 201620923634 U CN201620923634 U CN 201620923634U CN 205975686 U CN205975686 U CN 205975686U
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- Prior art keywords
- manhole
- shaft
- drainage
- inspection
- circulating water
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Abstract
The utility model discloses a circulating water concrete duct inspection manhole is arranged to eclipsed form, inspection manhole pass through behind floor layer and the main building bottom plate layer and to be connected with two or many circulating pipe through the manhole pipe laying, and inspection manhole and circulating pipe junction adoption manhole cover plate carry out the shutoff, inspection manhole includes the inspection manhole platform, lifts by crane equipment, the inspection shaft passageway, and the setting of inspection manhole platform is increased more than the 0.5m at the off -lying sea highest water level, and the elevation is less than elevation at the bottom of the circulating pipe of below at the bottom of the inspection manhole. When the unit shut down needs maintenance circulating pipe, to open the second and overhaul the drain valve, the water in the circulating pipe passes through drainage pipe entering sump pit, and the drain pump that is located the sump pit carries out high liquid level automatically according to the liquid level value who sets for and opens pump, low liquid level termination of pumping, high liquid level warning. The utility model provides a current inspection manhole problem of arranging position constraint, and when the semi -underground formula of main building is arranged, still can satisfy the maintenance requirement.
Description
Technical field
This utility model is related to manhole shaft research field in cyclic hydrostatic pressure hydraulic piping, particularly to a kind of eclipsed form cloth
Put recirculated water concrete duct manhole shaft.
Background technology
Increasing with generating set capacity, the increase of particularly nuclear power generating sets capacity, required quantity of circulating water
Increasing, existing finished product pipe diameter is difficult to meet demand, and increasing power plant cycle waterpipe adopts cast in place reinforced bar
Concrete duct.Due to the restriction of arrangement condition, most cast-in-situ steel reinforced concrete pipelines adopt eclipsed form arrangement, pipe
Road pattern adopts inner circle external square type.
According to design specification requirement, cyclic hydrostatic pressure hydraulic piping should arrange manhole shaft, to facilitate maintenance.For eclipsed form
Arrangement cast-in-situ steel reinforced concrete manhole shaft, prior art all arranges a manhole shaft, ginseng using every pipeline
See Fig. 1, manhole shaft 101 is arranged in the pipe head of circulating water pipe 102.The a diameter of DN800mm of inspection shaft, section configuration is
Circle, is provided with square inspection chamber, inspection chamber and the square manhole of ground junction 800mm × 800mm at ground, above sets
Cast iron flat.The program has the disadvantage that：
1) manhole shaft position is fixed, and can only be arranged in circulating water pipe end, easily sets with ground in main building
Standby arrangement is mutually conflicted.
2) manhole shaft aperture is less, and circulating water pipeline buried depth is deeper, maintainer's upper and lower distance in inspection manhole
Longer, and cannot rest.
3) during the semi-underground arrangement of main building, full of water it is impossible to open manhole shaft cover plate it is impossible to examine in manhole shaft
Repair, and maintainer cannot confirm water level height in inspection manhole, there is potential safety hazard.
4) must assure that below manhole shaft to be whole pipeline minimum point it is impossible to change recirculated water caliber, lead to pipeline
End flow velocity is low.
Utility model content
The purpose of this utility model is to overcome the shortcoming of prior art and deficiency, provides a kind of eclipsed form arrangement recirculated water
Concrete duct manhole shaft, this inspection shaft solves existing eclipsed form arrangement cast-in-situ steel reinforced concrete pipe manhole inspection shaft
The problem that position limits, and when main building semi-underground type is arranged, still be able to meet maintenance requirement.
The purpose of this utility model is realized by following technical scheme：Eclipsed form arranges recirculated water concrete duct manhole
Inspection shaft, passes through manhole pipe laying with two or more pieces circulating water pipe even after manhole shaft passing through floors layer and main building backplane level
Connect, manhole shaft is blocked using cover plate for manhole with circulating water pipe junction；Manhole shaft include inspection manhole platform,
Lifting appliance, inspection shaft passage, described inspection manhole platform is arranged on off-lying sea highest water level and increases more than 0.5m, described manhole inspection
Look into shaft bottom absolute altitude and be less than bottom circulating water pipe bottom absolute altitude.This utility model is arranged by said structure, can check manhole
Well is arranged in any position of circulating water pipeline lowest part, it is to avoid impact other equipment arrangement.It is simultaneously suitable for semi-underground type factory
Room, solves the problems, such as that off-lying sea water level is higher and cannot open manhole shaft.
Preferably, it is provided with half space in described inspection shaft passage centre position.For facilitating maintainer's bait.
Preferably, manhole shaft and circulating water pipe junction are blocked using flange manhole cover plate.Just ensure unit
When often running, the water in circulating water pipe will not enter in manhole shaft.
Preferably, described cover plate for manhole bottom is provided with a drainage system.
Further, described drainage system includes the first drainage for overhaul valve, pressure gauge, the second drainage for overhaul valve, draining
Pipeline, draining pump, liquid level detection device and control device, described cover plate for manhole is provided with a protruded tube, this protruded tube one end with
Circulating water pipe interior conduit connects, and described first drainage for overhaul valve, pressure gauge, the second drainage for overhaul valve are arranged at this protruded tube
On, when the second drainage for overhaul valve is opened, the water in circulating water pipe flows into catchmenting of manhole shaft bottom by drainage pipeline
Hole；Draining pump is arranged in catch pit, and liquid level detection device is used for monitoring the liquid level in catch pit；Described first drainage for overhaul
Valve, pressure gauge, the second drainage for overhaul valve, draining pump, liquid level detection device are respectively connected with control device.
Further, it is provided with manhole in circulating water pipeline side, at manhole, be provided with operating platform, described control dress
Put and be connected with operating platform, or setting is on the operational platform.Consequently facilitating maintainer is overhauled.
Preferably, in 3200～3700mm, width is in 1200～1700mm for described manhole shaft headroom dimensions length.
This utility model compared with prior art, has the advantage that and beneficial effect：
(1) this utility model may be arranged at any position of circulating water pipeline lowest part, can avoid affecting other equipment cloth
Put.
(2) this utility model is applied to semi-underground powerhouse, solve off-lying sea water level higher it is impossible to open manhole shaft
Problem.
(3) this utility model pass through arrange half space, solve circulating water pipe buried depth deeper when, maintainer cannot in
The problem of way rest.
(4) this utility model has complete drainage system, can protect maintainer well.
(5) this utility model is controlled using double drainage for overhaul valves, can effectively prevent draining service valve from damaging and lead to not
The problem of maintenance.
Brief description
Fig. 1 is the profile of manhole shaft in prior art.
Fig. 2 is the present embodiment cross-sectional view one.
Fig. 3 is the present embodiment cross-sectional view two.
Fig. 4 is the structural representation at drainage system in the present embodiment.
In Fig. 2-4：1 lifting appliance, 2 inspection manhole platforms, 3 inspection shaft passages, 4 floor layers, 5 main buildings
Backplane level, 6 circulating water pipes, 7 half spaces, 8 covers plate for manhole, 9 pressure gauges, 10 first drainage for overhaul valves, 11
Manhole pipe laying, 12 operating platforms, 13 band shield cage cat ladders, 14 draining pumps, 15 second drainage for overhaul valves.
Specific embodiment
With reference to embodiment and accompanying drawing, this utility model is described in further detail, but enforcement of the present utility model
Mode not limited to this.
Embodiment 1
Referring to Fig. 2,3, the present embodiment eclipsed form arrangement recirculated water concrete duct manhole shaft is it is adaptable to two or many
The cast-in-situ steel reinforced concrete circulating water pipe of bar arranged superposed.This two or more pieces circulating water pipe shares a manhole shaft, people
It is connected with circulating water pipe 6 by manhole pipe laying 11 after hole inspection shaft passing through floors layer 4 and main building backplane level 5, wherein manhole inspection
Look into shaft bottom absolute altitude and be less than bottom circulating water pipe bottom absolute altitude.Manhole shaft headroom size is about 3500mm × 1500mm.Manhole
Inspection shaft includes inspection manhole platform 2, lifting appliance 1, inspection shaft passage 3, is provided with band shield cage cat ladder 13 in inspection shaft passage 3.
Described inspection manhole platform 2 is arranged on off-lying sea highest water level and increases more than 0.5m, during preventing circulating water pipeline maintenance, outside
Sea water enters main building.
In the present embodiment, in manhole shaft, it is provided with half space 7, facilitate maintainer's bait.
In the present embodiment, manhole shaft is blocked using flange manhole cover plate 8 with circulating water pipe junction.
Referring to Fig. 4, in the present embodiment, it is provided with drainage system in cover plate for manhole bottom, drainage system includes the first maintenance row
Water valve 10, pressure gauge 9, the second drainage for overhaul valve 15, drainage pipeline, draining pump 14, liquid level detection device and control device, described
Cover plate for manhole is provided with a protruded tube, and this protruded tube one end is connected with circulating water pipe interior conduit, described first drainage for overhaul valve, pressure
Power table, the second drainage for overhaul valve are arranged on this protruded tube, and when the second drainage for overhaul valve is opened, the water in circulating water pipe leads to
Cross the catch pit that drainage pipeline flows into manhole shaft bottom；Draining pump is arranged in catch pit, and liquid level detection device is used for supervising
Survey the liquid level in catch pit；Described first drainage for overhaul valve, pressure gauge, the second drainage for overhaul valve, draining pump, liquid level detection device
Respectively it is connected with control device.
In the present embodiment, it is provided with manhole in circulating water pipeline side, at manhole, be provided with operating platform 12, described control
Device is arranged on the operational platform.
Eclipsed form described in the present embodiment arranges the method for work of recirculated water concrete duct manhole shaft, including step：
1st, when unit normally runs, due to the presence of cover plate for manhole, the water in circulating water pipeline will not enter manhole inspection
In well, inspection shaft can be kept to be in dry type state, the first drainage for overhaul valve is in normally open, and the second drainage for overhaul valve is in
Normally off, monitors hydraulic pressure in circulating water pipeline by pressure gauge.
2nd, when compressor emergency shutdown needs to overhaul circulating water pipe, open the second drainage for overhaul valve, the water in circulating water pipe passes through
Drainage pipeline enters catch pit, and the draining pump in catch pit automatically carries out high level according to the level value setting and opens pump, low
Liquid level termination of pumping, high high liquid level warning；
Once generation alarm signal, then quick closedown the second drainage for overhaul valve, cut-out current overhaul to draining pump；
If draining pump is out of service, but gage pressure value is not zero, then close the first drainage for overhaul valve and to second
Drainage for overhaul valve and pressure gauge are overhauled；
If draining pump is out of service and gage pressure value is zero, maintainer opens cover plate for manhole and enters recirculated water
Overhauled in pipeline.
When opening the second drainage for overhaul valve, manometric pressure value can be read by control device, then according to pressure
Value, automatically controls the aperture of the second drainage for overhaul valve.
Above-described embodiment be this utility model preferably embodiment, but embodiment of the present utility model be not subject to above-mentioned
The restriction of embodiment, other any without departing from the change made under spirit of the present utility model and principle, modify, replace
Generation, combination, simplification, all should be equivalent substitute mode, are included within protection domain of the present utility model.
Claims (7)
1. eclipsed form arrangement recirculated water concrete duct manhole shaft it is characterised in that manhole shaft passing through floors layer and
It is connected with two or more pieces circulating water pipe by manhole pipe laying after main building backplane level, manhole shaft and circulating water pipe junction
Blocked using cover plate for manhole；Manhole shaft includes inspection manhole platform, lifting appliance, inspection shaft passage, described maintenance
Manhole platform is arranged on off-lying sea highest water level and increases more than 0.5m, and described manhole shaft bottom absolute altitude is less than bottom circulating water pipe
Bottom absolute altitude.
2. eclipsed form according to claim 1 arrangement recirculated water concrete duct manhole shaft is it is characterised in that in institute
State inspection shaft passage centre position and be provided with half space.
3. eclipsed form according to claim 1 arrangement recirculated water concrete duct manhole shaft is it is characterised in that manhole
Inspection shaft is blocked using flange manhole cover plate with circulating water pipe junction.
4. eclipsed form according to claim 1 arrangement recirculated water concrete duct manhole shaft is it is characterised in that described
Cover plate for manhole bottom is provided with a drainage system.
5. eclipsed form according to claim 4 arrangement recirculated water concrete duct manhole shaft is it is characterised in that described
Drainage system includes the first drainage for overhaul valve, pressure gauge, the second drainage for overhaul valve, drainage pipeline, draining pump, liquid level detection device
And control device, described cover plate for manhole is provided with a protruded tube, and this protruded tube one end is connected with circulating water pipe interior conduit, and described
One drainage for overhaul valve, pressure gauge, the second drainage for overhaul valve are arranged on this protruded tube, when the second drainage for overhaul valve is opened,
Water in circulating water pipe flows into the catch pit of manhole shaft bottom by drainage pipeline；Draining pump is arranged in catch pit, liquid
Level detecting apparatus are used for monitoring the liquid level in catch pit；Described first drainage for overhaul valve, pressure gauge, the second drainage for overhaul valve, row
Water pump, liquid level detection device are respectively connected with control device.
6. eclipsed form arrangement recirculated water concrete duct manhole shaft according to claim 5 is it is characterised in that following
Ring waterpipe side is provided with manhole, is provided with operating platform at manhole, and described control device is connected with operating platform, or sets
Put on the operational platform.
7. eclipsed form according to claim 1 arrangement recirculated water concrete duct manhole shaft is it is characterised in that described
, in 3200～3700mm, width is in 1200～1700mm for manhole shaft headroom dimensions length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620923634.9U CN205975686U (en) | 2016-08-23 | 2016-08-23 | Circulating water concrete duct inspection manhole is arranged to eclipsed form |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620923634.9U CN205975686U (en) | 2016-08-23 | 2016-08-23 | Circulating water concrete duct inspection manhole is arranged to eclipsed form |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205975686U true CN205975686U (en) | 2017-02-22 |
Family
ID=58034229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620923634.9U Withdrawn - After Issue CN205975686U (en) | 2016-08-23 | 2016-08-23 | Circulating water concrete duct inspection manhole is arranged to eclipsed form |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205975686U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106088157A (en) * | 2016-08-23 | 2016-11-09 | 中国能源建设集团广东省电力设计研究院有限公司 | Eclipsed form arranges recirculated water concrete duct manhole shaft and inspection method thereof |
-
2016
- 2016-08-23 CN CN201620923634.9U patent/CN205975686U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106088157A (en) * | 2016-08-23 | 2016-11-09 | 中国能源建设集团广东省电力设计研究院有限公司 | Eclipsed form arranges recirculated water concrete duct manhole shaft and inspection method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170222 Effective date of abandoning: 20190730 |
|
| AV01 | Patent right actively abandoned |