A demonstration experiment device for compensating increase and decrease of energy loss of water flow in a pipeline

Abstract

The application discloses a pipeline water flow energy loss increase and decrease compensation demonstration experiment device, which comprises a bottom water storage tank, an upper water supply tank, an overflow plate, a water pump, a water pump upper water pipe, a tail flow backwater pipe, a first pipeline, a second pipeline, a tail water tank and a water pressure display plate; the first pipeline is sequentially connected by a first pipeline first straight line section, a first pipeline contraction section, a first pipeline expansion section and a first pipeline second straight line section; the second pipeline is sequentially connected by a second pipeline first straight line section, a U-shaped section and a second pipeline second straight line section; a booster pipe is connected between the first pipeline second straight line section and the second pipeline second straight line section; and a connecting hose one is arranged between the first pipeline contraction section and the U-shaped section of the second pipeline. Compared with the prior art, the pipeline water flow energy loss increase and decrease design is adopted to compensate the water flow energy loss of each pipeline and the flow between the pipelines, a more multi-dimensional and visual demonstration is realized, the structure is simple, the use cost is lower, and the engineering demonstration effect is obvious.

Description

TECHNICAL FIELD

[0001] The application is a pipeline water flow energy loss increase and decrease compensation demonstration experiment device, which belongs to the technical field of water power and water supply engineering. BACKGROUND

[0002] In the current pipeline water flow energy loss demonstration model, the water flow energy loss demonstration model is relatively single when the water body flows in the pipeline, and the boundary changes along the pipeline, the water flow energy loss of each pipeline, and the flow compensation between each pipeline are not made more diversified and visual demonstration. SUMMARY

[0003] The technical problem to be solved by the application is to provide a pipeline water flow energy loss increase and decrease compensation demonstration experiment device with diversified demonstration content.

[0004] The technical solution of the application is as follows:

[0005] A pipeline water flow energy loss increase and decrease compensation demonstration experiment device, characterized in that it comprises a bottom water storage tank, an upper water supply tank, an overflow plate, a water pump, a water pump upper water pipe, a tail flow backwater pipe, a first pipeline, a second pipeline, a tail water tank and a water pressure display plate.

[0006] One end of the first pipeline is connected to the upper water supply tank, and the other end of the first pipeline is connected to the tail water tank.

[0007] The first pipeline is composed of a first pipeline first straight line segment, a first pipeline contraction segment, a first pipeline expansion segment and a first pipeline second straight line segment connected in sequence; a first pipeline tail valve is arranged on the first pipeline second straight line segment.

[0008] The second pipeline is composed of a second pipeline first straight line segment, a U-shaped segment and a second pipeline second straight line segment connected in sequence; a second pipeline tail valve is arranged on the second pipeline second straight line segment.

[0009] A booster pipe is connected between the first pipeline second straight line segment and the second pipeline second straight line segment, and a booster pipe valve is arranged on the booster pipe.

[0010] A connecting hose one and a valve for controlling the opening or closing of the connecting hose one are arranged between the first pipeline contraction segment and the U-shaped segment of the second pipeline.

[0011] A plurality of water pressure display pipes are arranged on the water pressure display plate.

[0012] A pipe pressure measuring orifice is arranged in each of the first straight pipe section, the first pipe expansion section, the second straight pipe section, the first straight pipe section, the U-shaped section and the second straight pipe section, and each is connected with the water pressure display pipe through a hose.

[0013] The device comprises three parts: a circulating water supply part, a water pressure display board and a pipe water flow energy loss supplement mechanism. In the circulating water supply part, a bottom water storage tank, an upper water supply tank, an overflow plate, a tail water tank and a tail flow backwater pipe are arranged. The working mechanism is as follows: the water pump is used to make the water in the bottom water storage tank enter the upper water supply tank through the water pump outlet, the water in the upper water supply tank enters the pipe network, and finally flows into the tail water tank through the tail valve outlet, and then flows back to the bottom water storage tank through the tail flow backwater pipe. In the water pressure display board part, a water pressure display pipe is arranged. The working mechanism is as follows: the water pressure display pipe is connected with a hose, the orifice at a specified pipe position is connected with the water pressure display pipe, and the water pressure values at different positions of the pipe are measured. In the pipe water flow energy loss supplement mechanism part, a first pipe contraction section, a second pipe straight section, a U-shaped section, a connecting hose, a booster pipe, a contraction section valve, a U-shaped section top valve, a first pipe tail valve, a second pipe tail valve and a booster pipe valve are arranged. The working mechanism is as follows: the water pressure display pipe is used to measure the water flow energy loss value when the water flow passes through different boundaries. The lowest point of the U-shaped section top pipe is slightly lower or higher than the water surface line of the upper water supply tank, and the water flow in the pipe cannot pass through the U-shaped section. Due to the energy loss of the water flow in the flowing process, the water pressure at the top of the U-shaped section is insufficient to make the water flow pass through, which is the so-called low water pressure phenomenon. When the water pressure is lower than or slightly higher than the lowest point of the top of the U-shaped section, the tap water cannot flow normally in the pipe. In order to make the water flow pass through the U-shaped section, the first pipe contraction section is used to convert the water flow energy to generate negative pressure, and then the booster pipe is used to return to the U-shaped section to supplement the water pressure in the pipe after the U-shaped section, so that the negative pressure continuous flow in the U-shaped section is realized.

[0014] Compared with the prior art, the present application adopts a pipe water flow energy loss supplement mechanism, which can make the model intensive, visualize the energy loss of the pipe water flow along the pipeline and locally, display the negative pressure flow and reverse flow by using the negative pressure area and the backflow area, and provide a water pipe wiring scheme for the top floor residents without using a booster pump, thereby expanding the demonstration content, making a more multi-dimensional and visual demonstration, and having a simple structure, a low use cost and an obvious engineering demonstration effect. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic diagram of the device of the present application.

[0016] Figure 2 is a schematic diagram of the first pipe structure.

[0017] Figure 3 is a schematic view of a second pipe structure.

[0018] Wherein: 1, the bottom water storage tank, 2, the upper water supply tank, 3, overflow plate, 4, water pump, 5, water pump water pipe, 6, the wake backwater pipe, 7, the first pipe contraction section, 8, the second pipe straight section, 9, the contraction section valve, 10, connecting hose one, 11, the first pipe expansion section, 12, U section top valve, 13, water pressure display tube connecting hose, 14, booster pipe, 15, U section, 16, booster pipe valve, 17, water pressure display plate, 18, tail water tank, 19, the first pipe tail valve, 20, the second pipe tail valve, 21, water pressure display tube. DETAILED DESCRIPTION

[0019] The accompanying drawings Figure 1 , the present application is a pipe water flow energy loss increase and decrease compensation demonstration experiment device, including bottom water storage tank 1, upper water supply tank 2, overflow plate 3, water pump 4, water pump water pipe 5, wake backwater pipe 6, first pipe, second pipe, tail water tank 18 and water pressure display board 17;First pipe by first pipe first straight section, first pipe contraction section 7, first pipe expansion section 11 and first pipe second straight section in turn connected to constitute;Second pipe by second pipe first straight section 8, U section 15 and second pipe second straight section in turn connected to constitute. Water pump 4 is placed in the bottom water storage tank 1, the water outlet of water pump 4 is connected with the lower end of water pump water pipe 5, the upper end of water pump water pipe 5 is connected with upper water supply tank 2, the bottom water storage tank 1 is connected with upper water supply tank 2, overflow plate 3 is placed in the upper water supply tank 2, the left end of wake backwater pipe 6 is connected with the bottom water storage tank 1, the right end of wake backwater pipe 6 is connected with tail water tank 18, the front gradual change section of first pipe contraction section 7 is connected with equal diameter straight pipe, equal diameter straight pipe is connected with upper water supply tank 2, contraction section valve 9 is arranged on first pipe contraction section 7, the rear of first pipe contraction section 7 is connected with expansion pipe straight section, the rear of expansion pipe straight section is connected with reduced equal diameter pipe, reduced equal diameter pipe is provided with first pipe tail valve 19, the outlet wake end of first pipe tail valve 19 and the outlet wake end of second pipe tail valve 20 are placed in tail water tank 18, one end of second pipe straight section 8 is connected with upper water supply tank 2, the other end of second pipe straight section 8 is connected with the left end of U section, the right end of U section is connected with the front pipe of second pipe tail valve 20, contraction section valve 9 and U section top valve 12 are connected with connecting hose one 10, the front straight pipe of booster pipe 14 is connected with the front straight pipe of first pipe tail valve 19, the rear straight pipe of booster pipe 14 is connected with the front straight pipe of second pipe tail valve 20, one end of water pressure display tube connecting hose 13 is connected with water pressure display tube 21, the other end of water pressure display tube connecting hose 13 is connected with along line pipe pressure measuring orifice, water pressure display tube 21 is placed on water pressure display board 17.

[0020] Working process: A certain amount of water is added to the bottom water storage tank 1, and the water pump 4 is started. The water body enters the water pump upper water pipe 5 through the outlet of the water pump 4, flows into the upper water supply tank 2, and forms a stable water level at the top of the overflow plate 3. Part of the water body flows back to the bottom water storage tank 1 through the overflow plate 3. Another part of the water body enters the pipeline network, adjusts various valves, demonstrates the energy loss of water flow along the pipeline and at the boundary of the pipeline, and shows flow compensation and back pressure. Close the booster pipe valve 16 and the contraction section valve 9. Part of the water body passes through the first pipeline contraction section 7 front end first pipeline first equal diameter section, enters the first pipeline contraction section 7 and first pipeline expansion section 11, and then enters the first pipeline second equal diameter section before the first pipeline tail valve 19. Finally, it flows into the tail pipe through the first pipeline tail valve 19 after the valve and flows into the tail water tank 18. Through the tail water tank 18, the water flow flows into the tail flow return pipe 6 and flows back to the bottom water storage tank 1. Another part of the water body passes through the second pipeline first straight section 8, enters the left vertical pipe of the U-shaped section 15, and the top pipe wall of the U-shaped section 15 is slightly lower or higher than the overflow water level surface of the upper water supply tank 2. The water flow cannot pass through the U-shaped section 15, and the second pipeline tail valve has no water. Through the water pressure display pipe 21 on the water pressure display plate 17 connected by the connecting hose 13, the water flow energy loss value at different positions of the pipeline is displayed. Open the booster pipe valve 16, the contraction section valve 9 and the U-shaped section top valve 12. The water flow from the first pipeline second equal diameter section before the first pipeline tail valve 19, part of which flows back to the right vertical vertical pipe of the U-shaped section 15, and another part flows into the second pipeline second equal diameter section before the second pipeline tail valve 20, and flows into the tail water tank 18 through the second pipeline tail valve 20 tail pipe. Through the tail water tank 18, the water flow flows into the tail flow return pipe 6 and flows back to the bottom water storage tank 1. At this time, the water surface in the right vertical vertical pipe of the U-shaped section 15 is rising, and there is still some gas at the top of the U-shaped section 15. The water flow cannot pass through the U-shaped section 15 temporarily, but the remaining gas at the top of the U-shaped section 15 is gradually decreasing. This part of gas is sucked away by the negative pressure formed by the first pipeline contraction section 7 through the connecting hose one 10. When the gas in the U-shaped section 15 is completely sucked away, the water flow passes through the U-shaped section 15 and starts to flow. Adjust various valves, make different on-off combinations, observe and record the water pressure changes in the water pressure display pipe 21 on the water pressure display plate 17.

Claims

1. A demonstration experimental device for compensating for increases and decreases in energy loss during pipeline water flow, characterized in that: It includes a bottom water storage tank (1), an upper water supply tank (2), an overflow plate (3), a water pump (4), a water pump inlet pipe (5), a tail flow return pipe (6), a first pipe, a second pipe, a tail water tank (18), and a water pressure display plate (17); the upper water supply tank (2) is located above the bottom water storage tank (1), the overflow plate (3) is located inside the upper water supply tank (2), the water pump (4) is located inside the bottom water storage tank (1), the lower end of the water pump inlet pipe (5) is connected to the outlet of the water pump (4), and the upper end of the water pump inlet pipe (5) is located inside the bottom of the upper water supply tank (2); One end of the first pipe is connected to the upper water supply tank (2), and the other end of the first pipe is connected to the tailwater tank (18). The first pipeline is composed of a first straight section, a first constriction section (7), a first expansion section (11), and a second straight section connected in sequence; a first tail valve (19) is provided on the second straight section of the first pipeline. The second pipeline is composed of a first straight section, a U-shaped section (15), and a second straight section connected in sequence; a second tail valve (20) is provided in the second straight section of the second pipeline. A booster pipe (14) is connected between the second straight section of the first pipe and the second straight section of the second pipe, and a booster pipe valve (16) is provided on the booster pipe (14). A connecting hose (10) and a valve for controlling the opening or closing of the connecting hose (10) are provided between the first constriction section (7) of the pipe and the U-shaped section (15) of the second pipe; Multiple water pressure display tubes (21) are provided on the water pressure display panel (17); A pressure testing port is provided in the first straight section of the first pipeline, the first expanded section of the first pipeline (11), the second straight section of the first pipeline, the first straight section of the second pipeline, the U-shaped section (15), and the second straight section of the second pipeline, and is connected to a water pressure display tube (21) through a connecting hose 2. The lowest point inside the top pipe of the U-shaped section is slightly lower than or higher than the water level line of the upper water supply tank. The valves used to control the opening or closing of the connecting hose one (10) include a contraction section valve (9) provided on the first pipe contraction section (7) and a U-section top valve (12) provided on the U-section (15) of the second pipe; one end of the connecting hose one (10) is connected to the contraction section valve (9) and the other end is connected to the U-section top valve (12); Open the booster valve, the contraction section valve, and the top valve of the U-shaped section. Water flows from the second equal-diameter section of the first pipe before the tail valve of the first pipe. Part of the water flows back to the vertical pipe on the right side of the U-shaped section, and the other part flows into the second equal-diameter section of the second pipe before the tail valve of the second pipe. It then flows into the tailwater tank through the tail pipe of the tail valve of the second pipe. Through the tailwater tank, the water flows into the tail return pipe and back to the bottom storage tank. At this time, the water level in the vertical pipe on the right side of the U-shaped section is rising. There is still some gas at the top of the U-shaped section, so the water cannot pass through the U-shaped section temporarily. However, the gas remaining at the top of the U-shaped section is gradually decreasing. This gas is sucked away by the negative pressure formed by the contraction section of the first pipe through the first connecting hose. When the gas in the U-shaped section is completely sucked away, the water begins to flow through the U-shaped section.

2. The experimental device for compensating for the increase or decrease in energy loss of pipeline water flow according to claim 1, characterized in that: The valve used to control the opening or closing of the connecting hose one (10) is a valve provided on the connecting hose one (10).

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