CN205314233U

CN205314233U - Multi -functional sump pit structure in power station

Info

Publication number: CN205314233U
Application number: CN201620012282.1U
Authority: CN
Inventors: 董志浩; 宋文武; 董宏成; 符杰
Original assignee: Xihua University
Current assignee: Xihua University
Priority date: 2016-01-07
Filing date: 2016-01-07
Publication date: 2016-06-15
Anticipated expiration: 2026-01-07

Abstract

The utility model discloses a multi -functional sump pit structure in power station. Including overhauing sump pit and seepage sump pit, the drain line that overhauls competent setting between sump pit and the seepage sump pit is by the seepage sump pit to overhauing the one -way UNICOM of sump pit, drain line bottom elevation is the same with the alarm water level of seepage sump pit, the drain line that the level set up is including imported drain pipe, check valve, long handle gate valve and the export drain pipe connected in proper order. The utility model discloses structure unit in keeping the power station main building examine and repair in sump pit and the factory seepage sump pit separately the function with act on unchangeable basis on, function and effect behind interior two sump pits intercommunication of main building had both fully been excavated out, in order to increase operation rate, can suitably reduce the effective volume of seepage sump pit and the drainage flow of seepage drain pump again, capacity and quantity, cancel interim drain pump, reduce the investment, the power consumption consumes and maintenance cost, prevent that the serious accident from taking place, ensure hydroelectric power plant's safe operation and economic benefits's performance.

Description

A kind of power station multifunctional water collecting well structure

Technical field

This utility model technology belongs to Hydraulic and Hydro-Power Engineering technical field, relates to the structural design of unit maintenance sump and seepage from powerhouse sump in the main building of power station.

Background technology

Have in the power station main building of reaction water turbine generating set at device, be typically provided with unit maintenance sump and seepage from powerhouse sump.

Before reaction water turbine maintenance for generation companies, need to first close inlet gate (or water inlet main valve) and tail lock, entering in unit maintenance sump by the water in Turbine Flow Passage (including spiral case and draft tube) by unit maintenance water discharging valve and drain pipe and collector drain, the water-level gauge in recycling sump automatically controls drainage for overhaul pump and the water in Turbine Flow Passage and sump is drained into downstream. Owing to turbine-generator units needs lasting of the low and each draining of probability of drainage for overhaul also shorter, therefore unit maintenance sump and pumping equipment thereof the most of the time at ordinary times is only for getting rid of leaking on a small quantity of unit maintenance drain valve, lying substantially in " free time " state, utilization rate is very low.

Seepage from powerhouse sump is mainly used in the draining of percolating water and equipment lubrication, the cooling etc. collecting Factory Building hydraulic structure and turbine chamber, and the water-level gauge in recycling sump automatically controls seepage drainage pump and the water in sump is drained into downstream. When flood season the too big or seepage drainage pump of too big or turbine chamber the water amount of seepage of Factory Building hydraulic structure water percolating capacity and discharge pipe line break down time, the water in seepage from powerhouse sump is likely to cause the serious accident of water logging Factory Building because discharging in time.

Owing to unit maintenance sump is to have kill-job, namely during unit maintenance draining, sump top board to be subject to hydraulic pressure effect, and seepage from powerhouse sump is without kill-job, and therefore two sumps are usually individually separated, are independently arranged.

Owing to turbine-generator units needs lasting of the low and each draining of probability of drainage for overhaul also shorter, therefore unit maintenance sump and pumping equipment thereof the most of the time at ordinary times is only for getting rid of leaking on a small quantity of unit maintenance drain valve, lying substantially in " free time " state, utilization rate is very low;And on the other hand, in order to avoid it may happen that in the main building of power station the water in seepage sump cause the serious accident of water logging Factory Building because discharging in time, generally the dischargeable capacity of seepage sump in main building is arranged very big, and strengthen drain discharge and the capacity of seepage drainage pump, increase the quantity of draining pump or temporary drainage pump is set. So both fail fully to excavate out in main building be individually separated, function after two sumps connections being independently arranged and effect; Also add the investment of civil engineering and electromechanical equipment, increase consumption and the equipment operation maintenance expense of station service, be unfavorable for energy-saving and cost-reducing and hydroelectric power plant's economic benefit performance.

At present and the immediate solution the problems referred to above implementation of this utility model technology be: in order to avoid it may happen that in the main building of power station the water in seepage sump cause the serious accident of water logging Factory Building because discharging in time, generally the dischargeable capacity of seepage sump in factory is arranged very big, and strengthen drain discharge and the capacity of seepage drainage pump, increase the quantity of draining pump or temporary drainage pump is set.

Summary of the invention

This utility model discloses a kind of power station multifunctional water collecting well structure according to the deficiencies in the prior art. Problem to be solved in the utility model is to provide a kind of multi-functional, sump structure that combinative structure, utilization rate are higher.

This utility model is achieved through the following technical solutions:

Power station multifunctional water collecting well structure, including for the maintenance sump of unit maintenance and the seepage sump for seepage from powerhouse draining, it is characterised in that: there is horizontally disposed discharge pipe line by seepage sump to overhauling the unidirectional UNICOM of sump between described maintenance sump and seepage sump.

Described discharge pipe line Bottom Altitude is identical with the alarm water level of seepage sump.

Described horizontally disposed discharge pipe line includes the import drain pipe, check-valves, long handle gate valve and the outfall drain pipe that are linked in sequence.

Described outfall drain pipe is fixedly arranged in the structure between maintenance sump and seepage sump, and import drain pipe, check-valves or long handle gate valve are fixed on structure by suspension bracket.

The utility model discloses a kind of power station multifunctional water collecting well structure, this structure is keeping in power station main building on the constant basis of seepage sump each function and effect in unit maintenance sump and factory, both the function after two sumps in main building connect and effect had fully been excavated out, to improve the utilization rate of unit maintenance sump and pumping equipment thereof, can suitably reduce again the dischargeable capacity of seepage sump and the drain discharge of seepage drainage pump, capacity and quantity, cancel temporary drainage pump, reduce the investment of civil engineering and electromechanical equipment, the consumption of station service and equipment operation maintenance expense, the serious accident preventing water logging Factory Building occurs, guarantee that hydroelectric power plant's long-term safety runs the performance with economic benefit.

Advantages of the present invention is as follows:

It is additionally arranged a horizontal connecting pipeline between seepage sump in unit maintenance sump and factory in the main building of power station, keeping in power station main building on the constant basis of seepage sump each function and effect in unit maintenance sump and factory, both the function after two sumps in main building connect and effect had fully been excavated out, to improve the utilization rate of unit maintenance sump and pumping equipment thereof, can suitably reduce again the dischargeable capacity of seepage sump and the drain discharge of seepage drainage pump, capacity and quantity, cancel temporary drainage pump, reduce the investment of civil engineering and electromechanical equipment, the consumption of station service and equipment operation maintenance expense, the serious accident preventing water logging Factory Building occurs, guarantee that hydroelectric power plant's long-term safety runs the performance with economic benefit.

The check-valves arranged on connecting pipeline is one safety devices, namely ensures that current can only flow into maintenance sump from seepage sump and not allow reverse flow, in order to avoid there is misoperation and water logging Factory Building.

The long handle gate valve arranged on connecting pipeline is another road safety convenient facility; this valve was both prone to regular job because long handle stretches out sump top board; prevent the pressure water in maintenance sump to flow into seepage sump by connecting pipeline during in turn, ensuring that unit maintenance because of reliable closedown of this valve; in order to avoid misoperation occurs and water logging Factory Building, and safety shut-off valve when can keep in repair as check-valves.

Accompanying drawing explanation

Fig. 1 is this utility model power station multifunctional water collecting well design structural representation.

In figure, 1 is maintenance sump, and 2 is seepage sump, and 3 is long handle gate valve, and 4 is check-valves, and 5 is import drain pipe, and 6 is alarm water level, and 7 is suspension bracket, and 8 is outfall drain pipe, and 9 is sealing steel ring, and in figure, the direction of arrow is water (flow) direction.

Detailed description of the invention

By the examples below the present invention is specifically described; embodiment is served only for the present invention is further detailed; it is not intended that limiting the scope of the invention, some nonessential improvement and adjustment that those skilled in the art makes according to present disclosure fall within the scope of protection of the invention.

In conjunction with Fig. 1.

Power station multifunctional water collecting well structure, including for the maintenance sump 1 of unit maintenance and the seepage sump 2 for seepage from powerhouse draining, having horizontally disposed discharge pipe line by seepage sump 2 to overhauling the unidirectional UNICOM of sump 1 between maintenance sump 1 and seepage sump 2.

Described discharge pipe line Bottom Altitude is identical with the alarm water level 6 of seepage sump 2.

Described horizontally disposed discharge pipe line includes the import drain pipe 5, check-valves 4, long handle gate valve 3 and the outfall drain pipe 8 that are linked in sequence.

Described outfall drain pipe 8 is fixedly arranged in the structure between maintenance sump 1 and seepage sump 2, and import drain pipe 5, check-valves 4 or long handle gate valve 3 are fixed on structure by suspension bracket 7.

As shown in Figure 1, a horizontal connecting pipeline is set up between seepage sump 2 in unit maintenance sump 1 and factory in the main building of power station, this BOP elevation is identical with the alarm water level 6 of seepage sump 2, check-valves 4 and long handle gate valve 3 are arranged in seepage sump 2, long handle gate valve 3 passes sump top board by the action bars lengthened and makes manipulator take turns to be positioned on top board, so that installing and regular job is safeguarded, and suspension bracket 7 is set by sump top board fixes water discharging valve and steel pipe. Connecting pipeline, from being positioned at the water inlet of seepage sump 2 to the outlet being positioned at unit maintenance sump 1, is import drain pipe 5, suspension bracket 7, check-valves 4, suspension bracket 7, long handle gate valve 3 and outfall drain pipe 8 along water (flow) direction successively. The design pressure of the draining steel pipe of connecting pipeline, check-valves 4 and long handle gate valve 3 is 1.0MPa, it is sized to DN300～DN500, the sump of big volume or jumbo draining pump adopt big connecting pipeline, and the sump of little volume or the draining pump of low capacity adopt little connecting pipeline. A set of pipeline suspension bracket 7 is made up of one block of supporting plate, two screwed suspension rods in one end, four nuts, four packing rings, one piece of soleplate and four expansion bolts, and soleplate is fixed on sump top board with four expansion bolts, and suspension rod is welded on soleplate.

Utility model works principle: before (1) unit maintenance and during maintenance, long handle gate valve 3 should manually reliably be closed, then two sumps are kept, because connecting pipeline is blocked, the function and the effect that are each independently of the others. (2) long handle gate valve 3 is normally open at ordinary times.When in seepage sump 2 come the water yield less than design leak flow time, water-level gauge in sump automatically controls seepage drainage pump and the water in well is drained into downstream in time, the water level of sump will not arrive alarm water level 6, therefore the also connecting pipeline that cannot pass through between two wells of the water in seepage sump 2 enters in unit maintenance sump 1, and namely two sumps still keep the function and the effect that are each independently of the others; When flood season the too big or seepage drainage pump of too big or turbine chamber the water amount of seepage of Factory Building hydraulic structure water percolating capacity and discharge pipe line break down time, when water in seepage sump 2 makes water level arrive alarm water level 6 because discharging in time, aquiform stool in seepage sump 2 can be passed through the connecting pipeline between two sumps and enter maintenance sump 1, and by overhaul in sump 1 water-level gauge automatically control drainage for overhaul pump the water in well drained into downstream in time, it is to avoid there is the serious accident of water logging Factory Building. (3) check-valves 4 on connecting pipeline is one safety devices, namely ensures that current can only flow into maintenance sump 1 from seepage sump 2 and not allow reverse flow, in order to avoid there is misoperation and water logging Factory Building; Long handle gate valve 3 on connecting pipeline is another road safety convenient facility; this valve both action bars because lengthening pass sump top board to be made manipulator take turns to be positioned on top board; it is easily installed and safeguards with regular job; prevent the pressure water in maintenance sump 1 to flow into seepage sump 2 by connecting pipeline during in turn, ensuring that unit maintenance because of reliable closedown of this valve; in order to avoid misoperation occurs and water logging Factory Building, and safety shut-off valve when can keep in repair as check-valves 4. Therefore after setting up a horizontal connecting pipeline between two sumps, both function and effect that two sumps under normal circumstances are each independently of the others had been maintained, fully excavate out again the function after two sump connections and effect, unit maintenance sump 1 and pumping equipment thereof is made to become supplementing and standby of seepage from powerhouse drainage system, improve the utilization rate of maintenance sump 1 and pumping equipment thereof, substantially increase motility and safety that hydroelectric power plant runs.

Claims

1. a power station multifunctional water collecting well structure, including the maintenance sump (1) for unit maintenance and the seepage sump (2) for seepage from powerhouse draining, it is characterised in that: there is horizontally disposed discharge pipe line by seepage sump (2) to overhauling sump (1) unidirectional UNICOM between described maintenance sump (1) and seepage sump (2).

2. power station according to claim 1 multifunctional water collecting well structure, it is characterised in that: described discharge pipe line Bottom Altitude is identical with the alarm water level (6) of seepage sump (2).

3. power station according to claim 2 multifunctional water collecting well structure, it is characterised in that: described horizontally disposed discharge pipe line includes the import drain pipe (5), check-valves (4), long handle gate valve (3) and the outfall drain pipe (8) that are linked in sequence.

4. power station according to claim 3 multifunctional water collecting well structure, it is characterized in that: described outfall drain pipe (8) is fixedly arranged in the structure between maintenance sump (1) and seepage sump (2), and import drain pipe (5), check-valves (4) or long handle gate valve (3) are fixed on structure by suspension bracket (7).