Flow increasing device for long-distance gravity flow water delivery line

Abstract

The utility model discloses a long-distance gravity flow water delivery line flow increasing device which comprises a water pump unit, one end of the water pump unit is connected with a water inlet pipeline, the other end of the water pump unit is respectively connected with a waterproof hammer air tank and a water outlet pipeline through pipelines, and the other end of the waterproof hammer air tank is connected with a water drain pipe. The flow increasing device for the long-distance gravity flow water delivery line solves the problem that water supply flow cannot be increased in a long-distance gravity flow water supply project in the prior art.

Description

Technical Field

[0001] The utility model belongs to the technical field of water conservancy and hydropower engineering, and particularly relates to a device for increasing the flow rate of a long-distance gravity-flow water conveyance line. Background Art

[0002] In outdoor water supply projects, for a long-distance water supply pipeline that takes water from a reservoir and supplies water in a gravity-flow manner, when the water level difference between the inlet and outlet, the pipeline diameter, and the pipe material are determined, the flow capacity is a constant value. If it is necessary to increase the water supply flow rate, the conventional methods are to increase the pipe diameter, lay a double line, raise the water level of the water inlet, etc. For long-distance water supply, when the pipe diameter, pipe material, and water levels at the inlet and outlet are determined, it is impossible to replace the pipe diameter, lay a double line, or raise the water level of the water inlet, thus it is impossible to increase the water supply flow rate. Content of the Utility Model

[0003] The purpose of the utility model is to provide a device for increasing the flow rate of a long-distance gravity-flow water conveyance line, which solves the problem that the water supply flow rate cannot be increased in the existing long-distance gravity-flow water supply project.

[0004] The technical solution adopted by the utility model is that a device for increasing the flow rate of a long-distance gravity-flow water conveyance line includes a water pump unit. One end of the water pump unit is connected with a water inlet pipe, and the other end of the water pump unit is respectively connected with a water hammer air tank and a water outlet pipe through pipelines. The other end of the water hammer air tank is connected with a drain pipe.

[0005] The utility model is further characterized in that

[0006] The water pump unit includes a first water pump and a second water pump, and the first water pump and the second water pump are respectively connected with the water inlet pipe.

[0007] A first valve is arranged between the water inlet pipe and the first water pump, and a

[0008] second valve is arranged between the water inlet pipe and the second water pump.

[0009] The first water pump and the second water pump are jointly connected with the water hammer air tank and the water outlet pipe through pipelines respectively.

[0010] A flow meter and a third valve are arranged on the pipeline connecting the first water pump and the second water pump to the water hammer air tank.

[0011] The third valve is arranged at the port near the connection of the water hammer air tank to the water outlet pipe.

[0012] The first water pump, the second water pump, the water hammer air tank, the first valve, the second valve and the third valve are respectively connected with a control cabinet.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] (1) The flow rate increasing device for long-distance gravity flow water conveyance line provided by the utility model can greatly save investment without expanding the pipe diameter or adding another new pipeline.

[0015] (2) The flow rate increasing device for long-distance gravity flow water conveyance line provided by the utility model has a simple structure, convenient layout and low investment cost.

[0016] (3) The flow rate increasing device for long-distance gravity flow water conveyance line provided by the utility model is simple in construction and installation, can realize automatic control and is convenient to operate. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the flow rate increasing device for long-distance gravity flow water conveyance line of the utility model;

[0018] In the figure, 1. water inlet pipe; 2. first water pump; 3. second water pump; 4. first valve; 5. second valve; 6. water hammer air tank; 7. flowmeter; 8. third valve; 9. water outlet pipe; 10. drain pipe; 11. control cabinet. Detailed Description of the Preferred Embodiment

[0019] The utility model will be described in detail below with reference to the drawings and specific embodiments.

[0020] The utility model provides a flow rate increasing device for long-distance gravity flow water conveyance line, as Figure 1 shown, which includes a water pump unit. One end of the water pump unit is connected with a water inlet pipe 1, and the other end of the water pump unit is respectively connected with a water hammer air tank 6 and a water outlet pipe 9 through pipelines. The other end of the water hammer air tank 6 is connected with a drain pipe 10. The water pump unit includes a first water pump 2 and a second water pump 3. The first water pump 2 and the second water pump 3 are respectively connected with the water inlet pipe 1. A first valve 4 is arranged between the water inlet pipe 1 and the first water pump 2, and a second valve 5 is arranged between the water inlet pipe 1 and the second water pump 3. The first water pump 2 and the second water pump 3 are jointly connected with the water hammer air tank 6 and the water outlet pipe 9 through pipelines respectively. A flowmeter 7 and a third valve 8 are arranged on the pipeline connecting the first water pump 2 and the second water pump 3 with the water hammer air tank 6. The third valve 8 is arranged at the port near the connection of the water hammer air tank 6 to the water outlet pipe. The first water pump 2, the second water pump 3, the water hammer air tank 6, the first valve 4, the second valve 5 and the third valve 8 are respectively connected with a control cabinet 11.

[0021] The working principle of the utility model is as follows:

[0022] After adding the flow rate increasing device for long-distance gravity flow water conveyance line provided by the utility model to the water supply line, the water supply flow rate is increased by increasing the working head in the pipeline through the boost of the water pump unit and thus increasing the water flow velocity in the pipeline. The calculation formula is as follows:

[0023] H = V 2 / 2g (1);

[0024] Wherein, H represents the working head in the pipeline in m; V represents the flow velocity in the pipeline in m / s; G represents the acceleration of gravity in m / s2.

[0025] It can be seen from formula (1) that by increasing the working head in the pipeline, the flow velocity in the pipeline can be increased in a square relationship.

[0026] Q = A × V (2);

[0027] Wherein, Q represents the flow rate in the pipeline in m3 / s; A represents the flow-through area of the pipeline in m2;

[0028] It can be seen from formula (2) that when the flow-through cross-section of the water supply pipeline remains unchanged, increasing the flow velocity in the pipeline can achieve an increase in the flow-through capacity.

[0029] Operating principle:

[0030] Operating condition 1: When supplying water at the original designed flow rate, the overall pressurization system does not work, and the original pipeline water supply operation is maintained.

[0031] Operating condition 2: When the water supply flow rate increases during operation, all valves are in the open state. Through valve switching, the water in the original water supply pipeline enters the pressurization device, and any one of the two pump units is started for pressurized operation, and the other unit is in standby.

[0032] Accident condition: When the power supply is suddenly interrupted, the pump units will suddenly stop running, and water pressure fluctuations will occur in the water supply pipeline. When the fluctuations change greatly, it will cause harm to the pipeline system. The system absorbs and eliminates the water hammer pressure fluctuations in the pipeline system through the water hammer air tank to ensure the safety of the pipeline system.

[0033] Example 1

[0034] This example provides a device for increasing the flow rate of a long-distance gravity flow water conveyance line, as Figure 1 shown, including pump units. One end of the pump units is connected to the inlet pipeline 1, and the other end of the pump units is respectively connected to the water hammer air tank 6 and the outlet pipeline 9 through pipelines. The other end of the water hammer air tank 6 is connected to the drain pipe 10.

[0035] Example 2

[0036] This example provides a device for increasing the flow rate of a long-distance gravity flow water conveyance line, as Figure 1As shown in the figure, it includes a water pump unit. One end of the water pump unit is connected to an inlet pipeline 1, and the other end of the water pump unit is respectively connected to a water hammer air tank 6 and an outlet pipeline 9 through pipelines. The other end of the water hammer air tank 6 is connected to a drain pipe 10. The water pump unit includes a first water pump 2 and a second water pump 3. The first water pump 2 and the second water pump 3 are respectively connected to the inlet pipe 1. A first valve 4 is provided between the inlet pipe 1 and the first water pump 2, and a second valve 5 is provided between the inlet pipe 1 and the second water pump 3.

[0037] Embodiment 3

[0038] This embodiment provides a device for increasing the flow rate of a long-distance gravity flow water conveyance line, as Figure 1 shown in the figure, it includes a water pump unit. One end of the water pump unit is connected to an inlet pipeline 1, and the other end of the water pump unit is respectively connected to a water hammer air tank 6 and an outlet pipeline 9 through pipelines. The other end of the water hammer air tank 6 is connected to a drain pipe 10. The water pump unit includes a first water pump 2 and a second water pump 3. The first water pump 2 and the second water pump 3 are respectively connected to the inlet pipe 1. A first valve 4 is provided between the inlet pipe 1 and the first water pump 2, and a second valve 5 is provided between the inlet pipe 1 and the second water pump 3. The first water pump 2 and the second water pump 3 are jointly connected to the water hammer air tank 6 and the outlet pipeline 9 through pipelines respectively. A flow meter 7 and a third valve 8 are provided on the pipeline connecting the first water pump 2 and the second water pump 3 to the water hammer air tank 6.

[0039] Embodiment 4

[0040] This embodiment provides a device for increasing the flow rate of a long-distance gravity flow water conveyance line, as Figure 1 shown in the figure, it includes a water pump unit. One end of the water pump unit is connected to an inlet pipeline 1, and the other end of the water pump unit is respectively connected to a water hammer air tank 6 and an outlet pipeline 9 through pipelines. The other end of the water hammer air tank 6 is connected to a drain pipe 10. The water pump unit includes a first water pump 2 and a second water pump 3. The first water pump 2 and the second water pump 3 are respectively connected to the inlet pipe 1. A first valve 4 is provided between the inlet pipe 1 and the first water pump 2, and a second valve 5 is provided between the inlet pipe 1 and the second water pump 3. The first water pump 2 and the second water pump 3 are jointly connected to the water hammer air tank 6 and the outlet pipeline 9 through pipelines respectively. A flow meter 7 and a third valve 8 are provided on the pipeline connecting the first water pump 2 and the second water pump 3 to the water hammer air tank 6. The third valve 8 is arranged at a port close to the connection between the water hammer air tank 6 and the outlet pipeline.

[0041] Embodiment 5

[0042] This embodiment provides a device for increasing the flow rate of a long-distance gravity flow water conveyance line, as Figure 1As shown in the figure, it includes a water pump unit. One end of the water pump unit is connected to an inlet pipeline 1. The other end of the water pump unit is respectively connected to a water hammer air chamber 6 and an outlet pipeline 9 through pipelines. The other end of the water hammer air chamber 6 is connected to a drain pipe 10. The water pump unit includes a first water pump 2 and a second water pump 3. The first water pump 2 and the second water pump 3 are respectively connected to the inlet pipe 1. A first valve 4 is provided between the inlet pipe 1 and the first water pump 2. A second valve 5 is provided between the inlet pipe 1 and the second water pump 3. The first water pump 2 and the second water pump 3 are jointly connected to the water hammer air chamber 6 and the outlet pipeline 9 through pipelines respectively. A flowmeter 7 and a third valve 8 are provided on the pipeline connecting the first water pump 2 and the second water pump 3 to the water hammer air chamber 6. The third valve 8 is provided at the port where the water hammer air chamber 6 is connected to the outlet pipeline. The first water pump 2, the second water pump 3, the water hammer air chamber 6, the first valve 4, the second valve 5 and the third valve 8 are respectively connected to a control cabinet 11.

[0043] The flow rate increasing device for a long-distance gravity flow water conveyance line provided by the present utility model realizes the increase of the water supply flow rate by increasing the working head in the pipeline through the pressurization of the water pump unit, thereby increasing the water flow velocity in the pipeline.

Claims

1. Long-distance gravity flow water conveyance line flow rate increasing device, characterized in that It includes a water pump unit. One end of the water pump unit is connected to a water inlet pipe (1). The other end of the water pump unit is respectively connected to a water hammer prevention air tank (6) and a water outlet pipe (9) through pipelines. The other end of the water hammer prevention air tank (6) is connected to a drain pipe (10).

2. The long-distance gravity flow water conveyance line flow rate increasing device according to claim 1, characterized in that, The water pump unit includes a first water pump (2) and a second water pump (3). The first water pump (2) and the second water pump (3) are respectively connected to the water inlet pipe (1).

3. The long-distance gravity flow water conveyance line flow rate increasing device according to claim 2, characterized in that, A first valve (4) is provided between the water inlet pipe (1) and the first water pump (2). A second valve (5) is provided between the water inlet pipe (1) and the second water pump (3).

4. The flow rate increasing device for a long-distance gravity flow water conveyance line according to claim 3, characterized in that The first water pump (2) and the second water pump (3) are jointly connected to the water hammer prevention air tank (6) and the water outlet pipe (9) respectively through pipelines.

5. The long-distance gravity flow water conveyance line flow rate increasing device according to claim 4, characterized in that, A flow meter (7) and a third valve (8) are provided on the pipeline connecting the first water pump (2) and the second water pump (3) to the water hammer prevention air tank (6).

6. The flow rate increasing device for a long-distance gravity flow water conveyance line according to claim 5, wherein, The third valve (8) is provided at the port where the water hammer prevention air tank (6) is connected to the water outlet pipe, close to it.

7. The flow rate increasing device for a long-distance gravity flow water conveyance line according to claim 5, wherein The first water pump (2), the second water pump (3), the water hammer prevention air tank (6), the first valve (4), the second valve (5) and the third valve (8) are respectively connected to a control cabinet (11).

Images