Method for dredging water supply pipeline at water intake

Abstract

The present invention discloses a method for dredging a water supply pipeline at a water intake, comprising: shutting down the first and second water pumps of the zero-order No. 1 pump station; operating the fifth and seventh water pumps of the zero-order No. 2 pump station; closing the 2-meter gate plate between the 1# grid and the 3# connecting well, and closing the 2-meter gate plate between the 2# grid and the 3# connecting well; adjusting the operation of two or three water pumps of the zero-order No. 2 pump station according to the water volume of the two gravity steel pipes at the 2# water intake; shutting down the pump group when the water level in the water inlet chamber is too low and leakage occurs on the upper wall of the water inlet pipe; and after the water level reaches the same level as the Yellow River, restarting the fifth and eighth water pump groups to pump water from the suction well, paying attention to the water volume and speed of the pumping; if the pumping speed is too slow, it will be difficult to dredge the pipeline; and repeating this process until the water level no longer changes during the operation of the pump group. The present invention utilizes relevant knowledge of fluid mechanics to dredge pipelines blocked by flow, thereby achieving the purpose of safe water intake.

Description

Technical Field

[0001] The invention relates to a method for dredging a water intake water delivery pipeline. Background Art

[0002] In recent years, the Yellow River has experienced an increase in construction projects upstream and downstream, and due in part to natural conditions, the main river channel has shifted. A company had three water intakes built along the river for its main production operations. Due to the shifting river course, one or two of these intakes became stranded, with large amounts of silt and weeds clogging the intakes and even entering the pipes, rendering water impossible to draw. Because the pipes are located within the river, they cannot be cleared with high-pressure water guns or manually, as is the case with conventional buried or overhead pipelines, posing significant challenges.

[0003] Closest reference: CN106988392A A pipe dredging device and a pipe dredging method

[0004] Comparative analysis: Although both are methods for studying pipeline dredging, the research methods and techniques are different. This patent mainly adjusts the valve and uses the pressure difference to dredge, while patent CN106988392A provides a pipeline dredging device and a pipeline dredging method, which mainly performs physical dredging through related instruments. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for unblocking a water supply pipeline at a water intake, which utilizes relevant knowledge of fluid mechanics to unblock pipelines blocked in a flow state, thereby achieving the purpose of safe water intake.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The present invention provides a method for dredging a water intake water pipeline, comprising:

[0008] 1) The first and second water pumps of the zero-order pump station No. 1 are out of service; the fifth and seventh water pumps of the zero-order pump station No. 2 are in operation;

[0009] 2) Close the 2-meter gate valve from the 1# grid to the 3# connecting well, and close the 2-meter gate valve from the 2# grid to the 3# connecting well;

[0010] 3) According to the water volume of the two gravity steel pipes of the 2# water intake, adjust the operation of the three water pumps of the zero-order No. 2 pump station. When the water level in the water inlet chamber is too low and the upper wall of the water inlet pipe leaks, stop the pump group. After the water level is flush with the water level of the Yellow River, add the fifth and eighth water pump groups to pump water from the suction well. Pay attention to the amount of water pumped and the speed. It will be difficult to clear the blockage if the pumping speed is too slow. Repeat this process until the water level no longer changes during the operation of the pump group.

[0011] 4) Pay close attention to the changes in water level, sediment content, and sand piles between the 2# grids, and adjust the water purification system to enter the radiation sedimentation tank as much as possible.

[0012] Furthermore, in the above 2): consider whether to close the 1.6-meter gates of the two 1# water intake gravity pipes between the 1# grids based on the gate leakage. If the gate leakage is large, consider using divers to block the gates.

[0013] Compared with the prior art, the present invention has the following beneficial technical effects:

[0014] The method of the present invention utilizes relevant knowledge of fluid mechanics to dredge pipelines blocked in a flow state, thereby achieving the purpose of safe water extraction.

[0015] The water level difference is created through operation adjustment, which is repeated many times until it is connected and the water level is balanced. The operation mode is maintained to create a stable pumping space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 A framework diagram of a method for dredging a water intake water pipeline according to the present invention;

[0018] Explanation of the accompanying drawings: 101, first water pump; 102, second water pump; 103, third water pump; 104, fourth water pump; 201, fifth water pump; 202, sixth water pump; 203, seventh water pump; 204, eighth water pump. DETAILED DESCRIPTION Example

[0019] like Figure 1 As shown, a method for dredging a water intake water pipeline comprises:

[0020] 1) The first water pump 101 and the second water pump 102 of the zero-order pump station No. 1 are shut down; the fifth water pump 201 and the seventh water pump 203 of the zero-order pump station No. 2 are in operation;

[0021] 2) Close the 2-meter gate valve from the 1# grid to the 3# connecting well, and close the 2-meter gate valve from the 2# grid to the 3# connecting well;

[0022] 3) According to the water volume of the two gravity steel pipes of the 2# water intake, adjust the operation of the three water pumps of the zero-order 2 pump station. When the water level in the water inlet chamber is too low and the upper wall of the water inlet pipe leaks, stop the pump group. After the water level is flush with the water level of the Yellow River, add the sixth water pump 202 and the eighth water pump 204 pump group to extract water from the suction well. Pay attention to the amount of water extracted and the speed. It is difficult to clear the blockage if the speed is too slow. Repeat this process until the water level no longer changes during the operation of the pump group.

[0023] 4) Pay close attention to the changes in water level, sediment content, and sand piles between the 2# grids, and adjust the water purification system to enter the radiation sedimentation tank as much as possible.

[0024] In the above 2): consider whether to close the 1.6m gates of the two 1# water intake gravity pipes between the 1# grids based on the gate leakage. If the gate leakage is large, consider using divers to block the gates.

[0025] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A method for dredging a water intake water pipeline, characterized in that: include: 1) The first water pump (101) and the second water pump (102) of the zero-time pump station No. 1 are out of service; The fifth water pump (201) and the seventh water pump (203) of the zero-second pump station are running; 2) Close the 2-meter gate valve from the 1# grid to the 3# connecting well, and close the 2-meter gate valve from the 2# grid to the 3# connecting well; 3) According to the water volume of the two gravity steel pipes at the 2# water intake, adjust the operation of the three water pumps at the zero-order 2 pump station. When the water level in the water inlet chamber is too low and the upper wall of the water inlet pipe leaks, stop the pump group. After the water level reaches the same level as the Yellow River, open the previously stopped pump group and then open the sixth water pump (202) and the eighth water pump (204) to pump water from the suction well. Repeat this process until the water level no longer changes during the operation of the pump group. 4) Pay close attention to the changes in water level, sediment content, and sand piles between grids 2#, and adjust the water purification system to enter the radiation sedimentation tank.

2. The method for dredging a water intake water pipeline according to claim 1, characterized in that: In the above 2): consider whether to close the 1.6m gates of the two 1# water intake gravity pipes between the 1# grids based on the gate leakage. If the gate leakage is large, consider using divers to block the gates.

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