River sediment deposition testing system

Abstract

The utility model provides a riverway sediment deposition test system, which is characterized in that a third damping grid and an overflow plate are sequentially arranged in a reservoir at the upstream of a riverway to divide the interior of the reservoir into a front end, a flat water tank and a rear end; the front end is connected with a submersible sewage pump in the circulating water tank; the bottom of the flat pool is connected with the water inlet end of the static pool; the bottom of the rear end is connected with the circulating water tank; a first damping grid, a second damping grid and a fourth sand blocking ridge are sequentially arranged in the still water tank; three valve banks are arranged at the third sand blocking ridge, and the valve banks are connected with the submersible pump in the circulating water pool; and the combined sand blocking pool is arranged at the downstream and is connected with the circulating water pool through a water return channel. According to the utility model, cyclic detection of the sediment deposition condition of the river channel can be realized at low cost, so that the sediment deposition process and condition of the river channel can be predicted, and an accurate estimation result and guidance can be provided for cleaning and renovation of a water environment.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of measurement technology, and relates to a riverway silt deposition testing system, which is a testing method and testing device for silt deposition of various water environments, especially a riverway silt deposition testing method and testing device for a reservoir discharge riverway. BACKGROUND

[0002] The determination of silt deposition is one of important indexes for controlling whether a riverway is unobstructed and estimating the service life of a reservoir. In the process of discharge power generation, silt is mixed in a water environment and moves downstream to be discharged, and gradually deposits in a riverway, which causes the riverway to become shallower and hinders the flow of silt and water downstream, and causes problems such as the reduction of power generation efficiency of a hydropower station and the increase of the probability of water flooding a plant. Therefore, it is very important to estimate the silt deposition in a riverway to prevent economic losses. The existing testing system has the disadvantages of complicated setting, complex operation, high assembly cost, etc., while the testing system principle of the utility model is simple and reliable, the testing process is time-saving and labor-saving, and the detection accuracy is high. CONTENT OF THE UTILITY MODEL

[0003] In view of the above technical problems, the utility model provides a riverway silt deposition testing system, which can effectively determine the silt deposition in a riverway, solve the problems of difficult testing and low testing accuracy caused by turbulent water flow and high silt content, and has the advantages of simple testing system principle, low construction and assembly cost, etc.

[0004] The specific technical scheme is as follows:

[0005] A riverway silt deposition testing system comprises a water storage tank, a still water tank and a circulating water tank arranged at the upstream of a riverway.

[0006] The water storage tank is provided with a third rectifier grid and an overflow plate in sequence, and is divided into a front end, a flat water tank and a rear end; the front end is connected with a submersible sewage pump in the circulating water tank through a first water pump, a first check valve and a first water outlet regulating valve; the bottom of the flat water tank is connected with the bottom of the water inlet end of the still water tank through a water supply pipe, a third water outlet regulating valve and a second electromagnetic flowmeter; and the bottom of the rear end is connected with the circulating water tank through a drainage channel.

[0007] The still water tank is provided with a first rectifier grid, a second rectifier grid and a fourth sand trap in sequence, and is divided into a water outlet end, a rectifier grid gap, a still water tank main body and a water inlet end in sequence; the height of the top of the fourth sand trap is located between the top of the riverway and the bottom of the riverway.

[0008] The still water tank is provided with a first rectifier grid, a second rectifier grid and a fourth sand trap in sequence, and is divided into a water outlet end, a rectifier grid gap, a still water tank main body and a water inlet end in sequence; the height of the top of the fourth sand trap is located between the top of the riverway and the bottom of the riverway.

[0009] The combined sand retaining pool is provided with a second sand retaining dam and a first sand retaining dam in sequence, and a sand settling pool is arranged between the second sand retaining dam and the first sand retaining dam.

[0010] The submersible pump is installed in the circulating pool through a pump support.

[0011] The first water pumping pipe is installed through a pipe support.

[0012] The riverway silt accumulation testing system can realize the cyclic detection of the riverway silt accumulation condition at low cost, and can predict the riverway silt accumulation process and condition based on the testing principle and with the aid of a testing system, so as to provide accurate prediction results and guidance for the cleaning and regulation of the water environment. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a structural schematic view of the utility model;

[0014] Figure 2 is a front view of the water storage pool;

[0015] Figure 3 is a front view of the still water pool. DETAILED DESCRIPTION

[0016] The specific technical scheme of the utility model is described in combination with the drawings.

[0017] As shown in Figure 1 , a riverway silt accumulation testing system comprises a water storage pool A arranged at an upstream of a riverway, a still water pool B, and a circulating pool 7 arranged at a side of the riverway;

[0018] As shown in Figure 1 and Figure 2 , the water storage pool A is provided with a third flow regulating grid 37 and an overflow plate 39 in sequence, and is divided into a front end, a flat water pool 38 and a rear end; the front end is connected with a submersible pump 2 in the circulating pool 7 through a first water pumping pipe 6, a first check valve 5 and a first water outlet regulating valve 4; the bottom of the flat water pool 38 is connected with the bottom of an inlet end of the still water pool B through a water supply pipe 36, a third water outlet regulating valve 35 and a second electromagnetic flowmeter 34; the bottom of the rear end is connected with the circulating pool 7 through a drainage channel 1;

[0019] As shown in Figure 1 and Figure 3 , the still water pool B is provided with a first flow regulating grid 30, a second flow regulating grid 31 and a fourth sand retaining dam 33 in sequence, and is divided into an outlet end, a flow regulating grid gap, a still water pool main body 32 and an inlet end in sequence; the height of the top of the fourth sand retaining dam 33 is located between a riverway top 41 and a riverway bottom 42;

[0020] It also includes the third sand-retaining embankment 27, which is located at the tailrace channel 28 of the groyne 29 in the middle reaches of the river. Figure 1 As shown, there are factory outline 16, highway outline 17, and bridge outline 18 here. At the third sand retaining embankment 27, there are three valve groups 15. The valve groups 15 are connected to the second pumping pipe 10 via valve 14 and four-way pipe 13 respectively. The second pumping pipe 10 is connected to the submersible pump 8 in the circulating water pool 7 via the second check valve 12, the first electromagnetic flow meter 11, and the second outlet regulating valve 9.

[0021] It also includes combined sediment traps located downstream, such as... Figure 1 As shown, the right side line 19 of the river channel, the right side line 20 of the model, the left side line 25 of the model, and the left side line 26 of the river channel form a river bend. The combined sand-trapping pool is equipped with a second sand-trapping sill 24 and a first sand-trapping sill 22 in sequence. The sedimentation pool 23 is located between the second sand-trapping sill 24 and the first sand-trapping sill 22. The combined sand-trapping pool is connected to the circulating water pool 7 through a return water channel 21.

[0022] Submersible sewage pump 2 is installed in circulating water tank 7 via pump bracket 3.

[0023] The first pumping pipe 6 is installed via pipe support 40.

[0024] This utility model is a recirculating testing system. A submersible pump 2 draws water from the circulating water tank 7 into the first pumping pipe 6, which then flows through the outlet regulating valve 4 and the first anti-backflow check valve 5 into the storage tank A. As the water level in storage tank A rises, the unstable water flow is rectified and buffered by the rectifier grid 37 before flowing into the level water tank 38. When the water level rises and approaches the overflow plate 39, the water flows smoothly through the water supply pipe 36, through the outlet regulating valve 35 and the electromagnetic flowmeter 34, into the still water tank B. When the water level in storage tank A continues to rise, the overflow plate 39 blocks the overflow of sediment, and the water flows back into the circulating water tank 7 through the drainage channel 1. When the water flows through the still water tank B, the water flow is intercepted by the sand-blocking sill 33 before entering the still water tank body 32. After being rectified by the rectifier grids 31 and 30, the water flows out of the still water tank B and into the river channel. At the same time, sand is added at the river channel inlet, forming a mixed sand-water mixture with the water flowing out of the still water tank B. Submersible pump 8 draws water from circulating water tank 7 into the second pumping pipe 10, then through outlet regulating valve 9, electromagnetic flow meter 11, and second check valve 12 before entering the four-way pipe 13. The water then flows into the river channel through valve 14 and regulating valve group 15. At this point, the water flows through the sediment trap 27 to intercept sediment before entering the river channel and mixing with the upstream water flow downstream. Finally, it flows out of the river channel and into sediment trap 24 to intercept sediment again before entering the sedimentation tank 23. After sediment is settled, the water flows through sediment trap 22 into the return channel 21 and back into circulating water tank 7, thus achieving the purpose of measuring river sediment deposition and allowing for repeated testing.

[0025] The specific operating method is as follows:

[0026] 1) Turn on the power box, start the sewage pump 2, open and adjust the outlet valve 4;

[0027] 2) When the water level in the reservoir A is close to the overflow plate 39, open and adjust the outlet valve 35, start the electromagnetic flowmeter 34;

[0028] 3) When the water flow in the still water pool B starts to flow into the river channel, start to add sand at the river channel inlet, the amount of sand added is V1;

[0029] 4) When the water flow in the river channel passes through the sand trap 27, start the submersible pump 8, open and adjust the outlet valve 9, start the electromagnetic flowmeter 11, and open the valve group 15;

[0030] 5) After a period of time, the water flow in the drainage channel 1 and the backwater channel 21 flows back into the circulating pool 7;

[0031] 6) After the system is stable, collect and store the data;

[0032] 7) After the data collection is completed, close the valve group 15 and the outlet valves 4, 9, 35, turn off the power box, stop the operation of the sewage pump 2 and the submersible pump 8, and close the electromagnetic flowmeters 11 and 34;

[0033] 8) Read the sediment accumulation depth h in the sand settling tank 23, calculate the sediment accumulation volume V2 (the area of the sand settling tank bottom * the sediment accumulation depth), and the backflow sediment volume V = V1-V2;

[0034] 9) Repeat steps 1) - 7) to perform the next test.

Claims

1. A riverbed sediment deposition testing system, characterized in that, It includes a reservoir (A) and a stilling water tank (B) located upstream of the river, as well as a circulating water tank (7) located beside the river. The water storage tank (A) is equipped with a third rectifier grid (37) and an overflow plate (39) in sequence, which divides the interior of the water storage tank (A) into a front end, a level water tank (38) and a rear end; the front end is connected to the submersible sewage pump (2) in the circulating water tank (7) through the first pumping pipe (6), the first check valve (5) and the first outlet regulating valve (4); the bottom of the level water tank (38) is connected to the bottom of the inlet end of the still water tank (B) through the water supply pipe (36), the third outlet regulating valve (35) and the second electromagnetic flow meter (34); the bottom of the rear end is connected to the circulating water tank (7) through the drainage ditch (1); The still water pool (B) is provided with a first rectifier (30), a second rectifier (31), and a fourth sand-blocking sill (33) in sequence, dividing the still water pool (B) into the outlet end, the gap between the rectifiers, the main body of the still water pool (32), and the inlet end in sequence; the height of the top of the fourth sand-blocking sill (33) is between the top of the river (41) and the bottom of the river (42); It also includes the third sand-blocking embankment (27), which is located at the tailwater channel (28) of the groyne (29) in the middle reaches of the river. The third sand-blocking embankment (27) is equipped with three valve groups (15), which are connected to the second pumping pipe (10) via valve (14), four-way pipe (13), and the second pumping pipe (10) via the second check valve (12), the first electromagnetic flow meter (11), and the second outlet regulating valve (9). It also includes a combined sand-trapping pool located downstream, which is equipped with a second sand-trapping sill (24) and a first sand-trapping sill (22) in sequence. Between the second sand-trapping sill (24) and the first sand-trapping sill (22) is a sedimentation pool (23). The combined sand-trapping pool is connected to the circulating water pool (7) through a return water channel (21).

2. The riverbed sedimentation testing system according to claim 1, characterized in that, The submersible pump (2) is installed in the circulating water tank (7) via a pump bracket (3).

3. The riverbed sedimentation testing system according to claim 1, characterized in that, The first water pumping pipe (6) is installed via a pipe support (40).

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