CN206245390U - A culvert pipe diversion pump station - Google Patents

Abstract

The utility model discloses a culvert pipe water diversion type pumping station, which comprises a pump house provided with a centrifugal pump and a vacuum pump, a water diversion culvert pipe and a water intake head, the water diversion culvert pipe is connected with the water intake head and the centrifugal pump; Incline to the river channel, then extend to the bottom of the river along the river slope at 45°, set the water intake head at the bottom of the water intake culvert pipe, and set up a trash cage outside the water intake head, the water intake culvert pipe is perpendicular to the river channel at 90° to draw water, and the water enters through the water intake head converging into the water diversion culvert pipe In the pump room, the centrifugal pump drives the water circulation. According to the characteristics of farmland irrigation, the utility model rationally designs and arranges corresponding water intake engineering facilities to ensure the safety of water intake, which not only reduces project investment, but also reduces operating costs. The irrigation pump station form is worth popularizing in similar areas, and will generate huge economic benefits.

Description

A culvert pipe diversion pump station

technical field

The utility model relates to a culvert pipe water diversion device, which belongs to the technical field of farmland irrigation.

Background technique

The layout of the irrigation pump station water intake project is divided into two types: diversion type and shore type. The water diversion of irrigation pump stations is mostly taken from rivers and ditches. ; When the slope of the river course is mostly gentle, and in order to meet the flood control requirements, the irrigation pump station should adopt the diversion type arrangement. At present, the diversion type pumping station generally adopts open channel water diversion (as shown in Figure 1), and the open channel water diversion is composed of the diversion open channel and the forebay. Although it has the advantages of simple structure, this form is very easy to cause silt in the diversion open channel and the forebay Blockage, especially in the irrigation areas of the Yellow River Diversion with large sediment content. Culvert pipe water diversion has the advantages of convenient construction, saving cultivated land and clean pipes. However, since the Yellow River is a silt-rich river, sediment deposition has become a key issue related to the safe operation of the pumping station. the main reason. After the Xiaolangdi Reservoir was completed and put into operation, the lower reaches of the Yellow River continued to be scoured. The chances of large-flow water diversion in the Yellow River irrigation area decreased, the chances of medium and small-flow water diversion increased, and the chance of water diversion carrying sand into the canal increased. Therefore, there are still many problems in culvert pipe diversion for the Yellow River irrigation area.

Contents of the invention

The technical problem to be solved by the utility model is to provide a culvert pipe water diversion type pumping station to solve the problem of culvert pipe water diversion siltation in the irrigation of the Yellow River.

In order to solve this technical problem, the utility model provides a culvert pipe water diversion pumping station, which includes a pump room equipped with a centrifugal pump and a vacuum pump, a water diversion culvert pipe and a water intake head, and the water diversion culvert pipe connects the water intake head and the centrifugal pump; the water diversion culvert pipe The end of the far water source is inclined to the river channel at a slope of 2%, and then extends to the river bottom along the river slope at 45°. The water intake head is set at the bottom of the diversion culvert pipe, and a trash cage is set outside the water intake head. The water intake head converges to the water diversion culvert pipe and enters the pump room, and the centrifugal pump drives the water cycle.

The water diversion culvert pipe is provided with multiple sand outlets, and a recoil outlet is provided at the bend junction of the water diversion culvert pipe.

The water intake head is provided with at least one water inlet.

The diameter of the vacuum tube of the vacuum pump is Φ50mm.

The water diversion culvert is formed by connecting multiple single culverts.

The water diversion culvert pipe is provided with townships every 10m, and the townships are made of plain concrete with grade C15.

A bottom valve is provided at the connection between the water diversion culvert and the water intake head, and the bottom valve is closed by its own gravity and opened when the centrifugal pump is working.

The trash cage is composed of Φ6 steel bars arranged at a distance of 2 cm, and the trash cage is placed at the bottom of the river.

A slope protection of 10m is provided upstream and downstream of the water intake.

Beneficial effects: According to the characteristics of farmland irrigation, the utility model rationally designs and arranges corresponding water intake engineering facilities to ensure the safety of water intake, which not only reduces engineering investment, but also reduces operating costs. The irrigation pump station form is worth popularizing in similar areas. generate huge economic benefits.

Description of drawings

Fig. 1 is the structural representation of prior art open channel water diversion;

Fig. 2 is a structural schematic diagram of the utility model.

In the figure: 1 pump room, 2 diversion culvert pipe, 3 water intake head, 4 trash cage, 5 sand discharge outlet, 6 recoil outlet, 7 bottom valve, 8 township pier.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail.

Fig. 2 shows the structural representation of the utility model.

The utility model comprises a pump room 1 provided with a centrifugal pump 9 and a vacuum pump 10, a water diversion culvert pipe 2 and a water intake head 3, and the water diversion culvert pipe 2 is connected to the water intake head 3 and the centrifugal pump 9, and its length is determined by the distance between the water intake head and the pump room.

The water diversion culvert pipe 2 is composed of multiple single culvert pipes connected, the diameter of the water diversion culvert pipe 2 is determined according to the system flow rate, and the length of the diversion pipe is determined by conditions such as topography and landform.

The water diversion culvert pipe 2 is provided with townships 8 every 10m, and the townships 8 are made of plain concrete with grade C15.

The water intake head 3 is provided with at least one water inlet.

A bottom valve 7 is provided at the joint between the water diversion culvert pipe 2 and the water intake head 3, and the bottom valve 7 is closed by its own gravity and opened when the centrifugal pump 9 is working.

The water intake pipe of the water intake head 3 is orthogonal to the river channel at 90° to draw water, and a 10m slope protection is provided upstream and downstream of the water intake point; the water flows through the water intake head 3 into the water diversion culvert pipe 2 and enters the pump room 1, and the centrifugal pump 9 drives the water cycle.

Since the start of the centrifugal pump 9 relies on the vacuum pump 10 to extract air from the pipeline in front of the pump, causing the vacuum at the suction port of the pump to operate, the culvert-type water diversion increases the length of the pipeline in front of the pump and increases the amount of gas in the pipeline. The pipe diameter is changed from Φ25 to Φ50mm, which greatly shortens the opening time of the centrifugal pump 9 and enables the centrifugal pump 9 to work normally.

Contain a large amount of organic matter in the Yellow River silt, as long-term deposition in the water diversion culvert pipe 2, will produce silt compaction phenomenon, for this reason, the utility model adopts following technical scheme:

In order to prevent dirt from entering, a circular trash cage 4 is arranged on the outside of the water intake head 3, and the trash cage 4 is formed by an arrangement of steel bars with a Φ6 spacing of 2 cm. The trash cage 4 is placed at the bottom of the river to prevent the inhalation of debris such as aquatic plants.

The far water source end of the diversion culvert pipe 2 is inclined to the river course with a 2% gradient, so as to minimize the storage of water and silt in the diversion culvert pipe 2, and then extend to the bottom of the river along the river slope at 45 °, and the bottom of the diversion culvert pipe 2 is provided with a water intake head 3, After the machine pump is out of service, it is beneficial for the sediment to flow back with the water.

A recoil outlet 6 is provided at the bending junction of the water diversion culvert pipe 2, and a portable pump can be used to wash and silt when the water intake head 3 is silted up.

The water diversion culvert pipe 2 is provided with multiple sand discharge outlets 5, if the water diversion culvert pipe 2 is long, the sand discharge outlet 5 is reasonably set to provide convenient conditions for the water diversion culvert pipe desilting.

Control the flow velocity in the water diversion culvert pipe 2 to not less than 1.0m/s, and the suspended sand enters the field with the water, which will not cause sediment deposition in the water diversion culvert pipe 2.

Example:

Downstream of a Yellow River irrigation area, the average sediment content of the diversion water is 1.01-10kg/m ³ , the irrigated area is 3541 mu, involving 3 villages, and the crops are winter wheat and summer corn. For transportation, the pumping station is located on the west bank of River A, with a river bottom elevation of 17.50m and a riverbank elevation of 22.00m.

The soil bulk density in the irrigation area is 1.47g/cm ³ , the field water holding rate is 23.8%, the irrigation cycle is 10 days, and the irrigation time is 14 hours per day. According to hydraulic calculation, the design flow rate is 1292m ³ /h, and the head is 27m. Three sets of KQSN300-M13/313 double-suction centrifugal pumps are used as water pumps, with an installed power of 225kW. The pump room is 16.5m long and 5.5m wide, and is divided into pump room, power distribution room, transformer room and management room.

According to the project budget, the construction cost of the open channel water diversion pumping station is 691,600 yuan, and that of the culvert pipe water diversion pumping station is 661,700 yuan. The latter saves investment by 29,900 yuan compared with the former.

From 2010 to 2012, 36 open channel diversion irrigation pump stations will be built in this area. Judging from the operation status, the open channel and forebay should be dredged at least once every two years. Due to the different water diversion channels, the cost of labor, machinery, and land occupation caused by dredging is between 15,000 and 50,000 yuan, resulting in an increase in project operation and management costs. Combining the above two factors, the culvert pipe diversion pumping station has advantages over the open channel diversion pump station in terms of project cost and operation management.

According to the characteristics of farmland irrigation, the utility model rationally designs and arranges corresponding water intake engineering facilities to ensure the safety of water intake, not only reduces engineering investment, but also reduces operating costs. The irrigation pump station form is worth popularizing in similar areas and will generate huge economic benefits. benefit.

The above-mentioned embodiments of the utility model are only examples, not the only ones, and all changes within the scope of the utility model or equivalent to the scope of the utility model are surrounded by the utility model.

Claims (9)

1. a kind of culvert pipe water channeling type pumping plant, it is characterised in that：Including being provided with the pump house (1) of centrifugal pump (9) and vavuum pump (10), drawing Water culvert pipe (2) and water intake (3), diversion culvert pipe (2) connect water intake (3) and centrifugal pump (9)；Diversion culvert pipe (2) far water Source is inclined by 2% gradient to river course, and then 45 ° of side slope stretches to river bed along the river, and diversion culvert pipe (2) bottom sets water intake (3), takes Set outside head (3) and block dirty cage (4), intake pipe 90 ° of water intakings orthogonal with river course of water intake (3), water is confluxed by water intake (3) Enter pump house (1) in diversion culvert pipe (2), centrifugal pump (9) drives water circulation.

2. culvert pipe water channeling type pumping plant according to claim 1, it is characterised in that：The diversion culvert pipe (2) is provided with many places Sediment ejection opening (5), recoil mouth (6) is provided with diversion culvert pipe (2) bending intersection.

3. culvert pipe water channeling type pumping plant according to claim 1, it is characterised in that：The water intake (3) is provided with least one Water inlet.

4. culvert pipe water channeling type pumping plant according to claim 1, it is characterised in that：The vacuum-pumping tube pipe of the vavuum pump (10) Footpath is Φ 50mm.

5. culvert pipe water channeling type pumping plant according to claim 1, it is characterised in that：The diversion culvert pipe (2) is single by many Culvert pipe is connected and composed.

6. culvert pipe water channeling type pumping plant according to claim 1, it is characterised in that：The diversion culvert pipe (2) and water intake (3) Junction is provided with bottom valve (7), and the bottom valve (7) is closed by self gravitation, is being opened when centrifugal pump (9) works.

7. culvert pipe water channeling type pumping plant according to claim 1, it is characterised in that：The dirty cage (4) that blocks is by the spacing 2cm of Φ 6 Arrangement of bar constitute, block dirty cage (4) and be placed in river bed.

8. culvert pipe water channeling type pumping plant according to claim 1, it is characterised in that：The diversion culvert pipe (2) sets town every 10m Pier (8), the anchor block (8) uses grade to be made for the plain concrete cast of C15.

9. the culvert pipe water channeling type pumping plant according to claim any one of 1-8, it is characterised in that：Upstream and downstream sets at the water intaking 10m bank protections.