CN214574538U - Water inlet tank of water delivery pump station with sediment self-precipitation function - Google Patents

Abstract

The utility model discloses a water inlet pool of a water transfer pump station with silt self-sedimentation function, which comprises a water inlet opposite to the water inlet pool of the water transfer pump station, wherein two sedimentation pools with the same structure are respectively arranged on the two sides of the water inlet pool symmetrically to the center line of the water flow of the water inlet, and the two sedimentation pools are respectively separated from the water inlet pool by a water retaining wall; the sedimentation tank consists of a sediment deposition area and a water diversion transition area, and the elevation of the bottom plate of the sediment deposition area is lower than that of the water diversion transition area and that of the bottom plate of the water inlet tank; a group of sand guide grooves are respectively arranged on the bottom plate of the water inlet and are symmetrical to the two sides of the water flow central line of the water inlet, each group of sand guide grooves respectively extend from the water inlet to the position of a water retaining wall of the sediment deposition area on the corresponding side, and are communicated with the sediment deposition area through flow guide holes arranged on the corresponding position of the water retaining wall; and bypass water guide pipes are respectively arranged in the two water guide transition areas and are respectively communicated with the water pumping pipes of the water delivery pump station through electric valves. The utility model discloses a water delivery pump station does not shut down when silt clearance, guarantees normal water supply.

Description

Water inlet tank of water delivery pump station with sediment self-precipitation function

Technical Field

The utility model belongs to the technical field of water delivery channel long distance water transfer engineering and specifically relates to a water delivery pump station intake pond that possesses silt self-precipitation.

Background

In the long-distance water transfer engineering of the great river canal, a water transfer pump station is indispensable, and the water transfer pump station provides water supply safety guarantee for the sustainable development of the city economy and the society. The water transfer pump station generally comprises: forebay, maintenance gate, intake pool, water pump house and auxiliary factory building. After the water delivery pump station is put into operation, workers need to enter the water inlet tank regularly to clean deposited silt, and the water pump is required to be stopped to interrupt water supply when the silt is cleaned. At present, the problem that the water delivery pump station staff meets and remains to be solved in the course of the work has:

1. sediment deposited in the water tank after the pump station operates for one year influences the flow state of the water body, and the operation efficiency of the pump station is reduced. Taking a No. 34 water pipeline iron-west pump station of south-to-north water transfer center line matching project as an example, the size of the water inlet pool is 31.9m in length, 6.3m in width and 9.8m in depth, and the depth of silt deposited every year is about 6m, namely two thirds of the net depth of the water inlet pool; the water flows into the intake basin to the water pump inlet tube from the forebay, and the bottom of the water in the intake basin is similar to the sandy beach that rises, and the water overflows effective cross-section less, and the roughness increases.

2. Along with the operation of a pump station, after sediment in the water inlet tank reaches a certain degree, the sediment velocity of the sediment is no longer the same as that of the initial operation of the water inlet tank, the sediment velocity of the sediment is reduced, most of the sediment brought by the water body enters the water pump and is pumped into the water pipeline, and then is deposited into the water pipeline; in addition, the machine-passing silt of the water pump can also accelerate the abrasion of the impeller of the water pump.

3. The silt deposited in the cleaning water inlet tank needs to be cleaned once every year, the water pump is required to stop running and water supply is interrupted when the silt is cleaned, and the annual average cost for cleaning the silt needs more than twenty thousand, so that the operation cost of a pump station is high.

4. Silt deposited in the water inlet tank contains algae organic matters, fermentation is started in 5 months every year, bubbles on the water surface are directly seen to emerge, and the silt is most serious in October and September and pollutes the water quality of a pump station.

The reason for the defects is mainly that the flowing water contains silt and algae bacteria, the overflowing area of the water is increased after the water enters the water inlet pool, the flow speed is reduced, and conditions are created for silt deposition. Carefully observe that the relative sediment from the water inlet maintenance gate to the main overflow area of the water pump is less, the water inlet of the water pump almost forms a funnel shape, and the sediment is pumped away by the water pump. Look up present current design standard, do not have design standard and standard to water transfer pump station intake sump clearance silt specially, also do not have the provision requirement of water transfer pump station intake sump clearance silt in the relevant architectural design standard. Therefore, the method is suitable for the requirement of long-distance water supply engineering construction for cleaning silts deposited in the water inlet tank.

Disclosure of Invention

An object of the utility model is to provide a water transfer pump station intake chamber that possesses silt self-precipitation utilizes the kinetic energy behind the water entering intake chamber and the kinetic energy that the water pump leading water pipe provided, realizes not shutting down the clearance of siltation.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

the water inlet pool with silt self-sedimentation of the water transfer pump station comprises a water inlet which is opposite to the water transfer pump station, two sedimentation pools with the same structure are respectively arranged on the two sides of the water inlet pool symmetrically at the center line of water flow of the water inlet, and the two sedimentation pools are respectively separated from the water inlet pool by a water retaining wall; the sedimentation tank consists of a sediment deposition area and a water diversion transition area, the sediment deposition area is positioned at one side close to the water inlet, and the water diversion transition area is positioned at one side close to the water delivery pump station; the elevation of the bottom plate of the sediment deposition area is lower than that of the bottom plate of the water diversion transition area and the water inlet pool; a group of sand guide grooves are respectively arranged on the bottom plate of the water inlet tank and are symmetrical to the two sides of the water flow central line of the water inlet, each group of sand guide grooves respectively extend from the water inlet to the position of the water retaining wall of the sediment deposition area on the corresponding side of the water flow central line of the water inlet, and are communicated with the sediment deposition area through flow guide holes arranged on the corresponding positions of the water retaining wall; and bypass water pipes are respectively arranged in the two water diversion transition areas and are respectively communicated with the water pumping pipes of the water delivery pump station through electric valves.

Preferably, the bottom plate of the sediment deposition area is a horizontal plane, the bottom plate of the water diversion transition area is an inclined plane which is inclined downwards towards the sediment deposition area, and the gradient is 5-7% so as to be beneficial to keeping sediment in the sediment deposition area; the setting principle of the elevation difference that the elevation of the bottom plate of the sediment deposition area is lower than that of the floor of the diversion transition area is as follows: the capacity of sediment deposition in one week of the water transfer pump station is met.

Preferably, the bottom plate of the sand guide groove is of an arc-shaped structure, and the flow guide holes formed in the two water retaining walls are both square flow guide holes.

Preferably, the bottom plate of the water inlet pool is an inclined plane which is called as the water flow center line of the water inlet and is inclined downwards towards the sedimentation pool, and the gradient is 2-3%.

The utility model discloses the advantage embodies in following aspect:

1. reduce the interior sediment deposit of water transfer pump station intake pond, improve the water flow state in the intake pond, the water overflows effective cross-section and stabilizes, improves water transfer pump station operating efficiency.

2. Reduce the silt of the water pump and the abrasion of the water pump impeller.

3. The working procedure of regularly cleaning the sediment deposited in the water inlet tank of the water transfer pump station is simple, and the mud pump truck is adopted to perform centralized sediment cleaning on the sediment area of the sediment deposition tank, so that the labor force is reduced, and the working efficiency is improved; meanwhile, the water delivery pump station is not stopped, and normal water supply is guaranteed.

4. Sediment deposited in a water inlet tank of the water delivery pump station is cleaned in time, and the pollution of algae organic matters in the deposited sediment to the water quality of the pump station is restrained.

5. The large-area work of cleaning deposited silt in the water inlet pool of the water transfer pump station is avoided, and the operating cost of the pump station is saved; the special cost for cleaning sediment deposition of one existing running water transfer pump station is about 25 ten thousand yuan per year; preliminary calculating adopts the utility model discloses achievement pump station clearance deposit silt is once every week cleared up, and the cost of clearing up is about 1000 yuan, and annual clearance cost 5 ten thousand 4 thousand yuan, but also enough guarantee that the pump station can long-term, continuous operation, improve water supply reliability and water supply quality.

Drawings

Fig. 1 is the arrangement schematic diagram of the water delivery pump station, the water inlet pool and the sedimentation pool of the utility model.

Fig. 2 is a sectional view taken along the direction N-N of fig. 1 (rotated by 90 ° clockwise).

Fig. 3 is a sectional view (rotated 90 ° clockwise) from K1 to K1 of fig. 1.

Fig. 4 is a sectional view (rotated 90 ° clockwise) taken from the direction K2-K2 of fig. 1.

Detailed Description

The embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following embodiments.

As shown in fig. 1-4, the water intake pool of the water pump station with sediment self-sedimentation of the utility model comprises a water inlet 2.1 facing the water intake pool 2 of the water pump station 1, two sedimentation pools 3 with the same structure are respectively arranged on the two sides of the water intake pool 2 symmetrically to the water inlet water flow central line 2.2, the two sedimentation pools 3 are respectively separated from the water intake pool 2 by a retaining wall 4, and the sum of the areas of the two sedimentation pools 3 is 20% of the area of the water intake pool 2; the bottom plate of the water inlet pool 2 is an inclined plane which is called as the water flow central line 2.2 of the water inlet and inclines downwards towards the sedimentation pools 3 at two sides, and the gradient is 2-3%.

The sedimentation tank 3 consists of a sediment deposition area 3.1 and a water diversion transition area 3.2, wherein the sediment deposition area 3.1 is positioned at one side close to the water inlet 2, and the water diversion transition area 3.2 is positioned at one side close to the water delivery pump station 1; the bottom plate of the sediment deposition area 3.1 is a horizontal plane, the bottom plate of the water diversion transition area 3.2 is an inclined plane which is inclined downwards towards the sediment deposition area 3.1, and the gradient is 5% so as to be beneficial to keeping sediment in the sediment deposition area; the bottom plate elevation of sediment deposit district 3.1 is less than the bottom plate elevation of diversion transition district 3.2 and intake pond, and specifically, the difference in elevation design principle that sediment deposit district 3.1 bottom plate elevation is less than diversion transition district 3.2 floor elevation is: the standard is to satisfy the volume of sediment in water delivery pump station 1 week, generally 3 ~ 5 meters.

According to the width of a water inlet 2.1 of a water inlet pool 2, two sides, which are symmetrical to a water flow central line 2.2 of the water inlet, of a bottom plate of the water inlet pool 2 are respectively provided with a group of sand guide grooves, each group of sand guide grooves consists of three sand guide grooves 2.3, the bottom planes of the three sand guide grooves are arc-shaped, each group of sand guide grooves respectively extends to a position of a water retaining wall 4 of a sediment deposition area 3.1 on one side corresponding to the water flow central line 2.2 of the water inlet from the water inlet 2.1, and is communicated with the sediment deposition area 3.1 through a square flow guide hole 4.1 arranged on the water retaining wall 4 at the corresponding position.

The sum of the flow areas of the square diversion holes 4.1 on each side water retaining wall 4 is equal to the flow area of the bypass water diversion pipe 3.3 arranged in the corresponding side water diversion transition area 3.2; the width of each group of sand guide grooves is selected to meet the requirement of the width range of surrounding the water inlet 2.1.

Preferably, when the width of the water inlet 2.1 is less than or equal to 3m, each group of sand guide grooves consists of three sand guide grooves 2.3; when the width of the water inlet 2.1 is more than 3 meters and less than or equal to 4 meters, each group of sand guide grooves consists of four sand guide grooves 2.3; when the width of the water inlet 2.1 is more than 4 meters, each group of sand guide grooves consists of five sand guide grooves 2.3.

And bypass water guide pipes 3.3 are respectively arranged in the two water guide transition areas 3.2, and the two bypass water guide pipes 3.3 are respectively communicated with a water pumping pipe 3.5 of the water delivery pump station 1 through electric valves 3.4.

The utility model discloses the theory of operation is as follows briefly:

when the water pumping pipe of the water delivery pump station 1 normally pumps water, the opening degrees of electric valves 3.4 of water guiding pipes 3.3 on two sides are synchronously adjusted, and through the combined action of a square diversion 4.1 and a sand guiding groove 2.3 arranged on a water retaining wall 4, a water head is formed between a water inlet pool 2 and a sediment deposition area 3.1, so that an effective overflowing channel between the water inlet 2.1 and the sediment deposition areas 3.1 on two sides is formed in the water inlet pool 2; on the one hand, silt brought by the water body at the water inlet 2.1 of the water inlet pool is pushed into the sand guide groove 2.3 by utilizing the kinetic energy of the water body at the water inlet 2.1, so that the silt is kept to move towards the silt settling areas 3.1 at two sides of the water flow central line 2.2 of the water inlet in the sand guide groove 2.3, and on the other hand, the sand pulling effect on the silt in the water inlet pool 2 is achieved by utilizing the water level difference between the two silt settling areas 3.1 and the water inlet pool 2, and the silt in the water inlet pool 2 is conveyed and settled in the two silt settling areas 3.1.

According to the sediment situation of 3.1 sediment in the two sediment deposition areas, the mud pump truck is regularly adopted to intensively clean the sediment in the two sediment deposition areas 3.1.

Claims (4)

1. The utility model provides a water transfer pump station intake pond that possesses silt is from deposiing, includes that the water inlet is just to the intake pond of water transfer pump station, its characterized in that: two sedimentation tanks with the same structure are respectively arranged on two sides of the water inlet tank and are symmetrical to the water flow central line of the water inlet, and the two sedimentation tanks are respectively separated from the water inlet tank through a water retaining wall; the sedimentation tank consists of a sediment deposition area and a water diversion transition area, the sediment deposition area is positioned at one side close to the water inlet, and the water diversion transition area is positioned at one side close to the water delivery pump station; the elevation of the bottom plate of the sediment deposition area is lower than that of the bottom plate of the water diversion transition area and the water inlet pool; a group of sand guide grooves are respectively arranged on the bottom plate of the water inlet tank and are symmetrical to the two sides of the water flow central line of the water inlet, each group of sand guide grooves respectively extend from the water inlet to the position of the water retaining wall of the sediment deposition area on the corresponding side of the water flow central line of the water inlet, and are communicated with the sediment deposition area through flow guide holes arranged on the corresponding positions of the water retaining wall; and bypass water pipes are respectively arranged in the two water diversion transition areas and are respectively communicated with the water pumping pipes of the water delivery pump station through electric valves.

2. The water intake pond of the water transfer pump station with sediment self-sedimentation function of claim 1, which is characterized in that: the bottom plate of the sediment deposition area is a horizontal plane, the bottom plate of the water diversion transition area is an inclined plane which is inclined downwards towards the sediment deposition area, and the gradient is 5-7% so as to be beneficial to keeping sediment in the sediment deposition area; the setting principle of the elevation difference that the elevation of the bottom plate of the sediment deposition area is lower than that of the floor of the diversion transition area is as follows: the capacity of sediment deposition in one week of the water transfer pump station is met.

3. The water intake pool of the water transfer pump station with sediment self-sedimentation function as claimed in claim 1 or 2, wherein: the sand guide groove bottom plate is of an arc-shaped structure, and the flow guide holes formed in the two water retaining walls are square flow guide holes.

4. The water intake pool of the water transfer pump station with sediment self-sedimentation function as claimed in claim 1 or 2, wherein: the bottom plate of the water inlet pool is an inclined plane which is called as the water flow central line of the water inlet and inclines downwards towards the sedimentation pool, and the gradient is 2-3%.

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