Shore-side multi-water level combined water intake pump house water inlet pipe sediment flushing device and method

Abstract

The present invention belongs to the technical field of water supply systems, specifically a shore-based, multi-water-level combined water intake pump station inlet pipe sediment flushing device and method. The device comprises a pump station forebay, a water intake pump assembly, a gravity inlet pipe, a backwash main pipe, a backwash pipe, a control system, a monitoring system, and a flushing plug. The device can adapt to varying water intake levels, enabling flushing of the inlet pipe under various water intake conditions by controlling valve switching.

Description

Technical Field

[0001] The invention belongs to the technical field of water supply systems, and relates to a shore-type multi-water-level combined water intake pump house, in particular to a device and method for flushing sediments in a water inlet pipe of a shore-type multi-water-level combined water intake pump house. Background Art

[0002] Water resources are essential for human survival. With the rapid development of society and the improvement of people's living standards, water pumping stations are often needed to deliver high-quality raw water to meet domestic and industrial water needs. As a crucial component of urban water supply systems, water pumping stations are subject to high design requirements for water intake safety, energy-efficient operation, and stability. However, most rivers in my country suffer from severe soil erosion, resulting in large amounts of sediment being carried away by the riverbed during runoff. The inlet pipes of water pumping stations mostly use gravity flow, which is highly susceptible to sediment deposition within the pipes. Sediment within the pipes can cause wear and damage to the pipe walls and reduce the pipe's flow-through area, impacting the safety and economic efficiency of pipeline operation.

[0003] Currently, silt removal within water supply pipelines primarily relies on mechanical equipment to agitate the silt into turbid water for transport and extraction. However, this sediment removal technology is limited by long construction periods, high investment costs, and demanding operational requirements. Therefore, a device for removing sediment from the water inlet pipe, built into the pump station's own facilities, has been developed. This device, which can clean silt-laden pipes through simple valve manipulation, has significant implications for the optimized design of shore-based intake pumphouses and is a crucial tool for ensuring the safe and stable operation of pump stations. Summary of the Invention

[0004] The purpose of the present invention is to design a shore-side multi-water-level combined water intake pump room inlet pipe sediment flushing device, which reduces the sediment in the gravity water inlet pipe of the water intake pump station through simple valve control operation, reduces the pipeline friction, increases the flow cross-section, and maintains the water delivery effect of the water intake pump station.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows:

[0006] A shore-side multi-water-level combined water intake pump house inlet pipe sediment flushing device comprises a pump station forebay, a water intake pump group, a gravity water inlet pipe, a backwash main pipe, and a backwash pipe in a water intake pump station. The end of the backwash main pipe is externally connected to an outlet main pipe. The water intake pump group extracts water from the pump station forebay and transports it to the outlet main pipe. The backwash main pipe is divided into several backwash pipes before entering the pump station forebay. The pump station forebay is respectively connected to some backwash pipes, and the gravity water inlet pipes are respectively connected to other some backwash pipes. The backwash main pipe, backwash pipes and gravity water inlet pipes are all provided with control valves.

[0007] Furthermore, the backwash main pipe is divided into four backwash pipes before entering the pump station forebay, the pump station forebay is respectively connected to two backwash pipes, and the gravity water inlet pipe is respectively connected to the other two backwash pipes.

[0008] Furthermore, the backwash main pipe is provided with a first control valve and a valve well, the backwash pipe connected to the gravity water inlet pipe is provided with a second control valve, the backwash pipe connected to the pump station front pool is provided with a third control valve, and the tail of the gravity water inlet pipe is provided with a fourth control valve.

[0009] Furthermore, a sediment monitoring system is installed in the gravity water inlet pipe to monitor the thickness of sediment in the pipe.

[0010] Furthermore, a water level monitoring system is installed in the forebay of the pump station to monitor the water level in the forebay.

[0011] Furthermore, a flow rate monitoring system is installed in the backwash pipe to monitor the flow rate in the pipe.

[0012] Preferably, the flow rate monitoring system is an ultrasonic flow rate detector.

[0013] Furthermore, the backwash pipe is connected to a flushing plug before entering the pump station forebay to flush the top platform of the pump station forebay.

[0014] Furthermore, it also includes a control system, which is connected to the sediment monitoring system, the water level monitoring system, the flow rate monitoring system and the control valve respectively.

[0015] The present invention also provides a method for flushing sediments in the water inlet pipe of a shore-side multi-water-level combined water intake pump room: the flushing device is divided into a low-water-level flushing mode and a high-water-level flushing mode. When the sediment monitoring system detects that the sediment thickness in the pipeline exceeds the set value, the control valve in the corresponding mode is operated according to the water intake level to start gravity water inlet pipe flushing. When the flushing is completed, the normal operating condition of the pump room is restored by switching the control valve.

[0016] Furthermore, when the water intake level is low, the liquid level in the forebay of the pump station is increased, and the pipeline is flushed using the liquid level difference inside and outside the pump station. The specific steps include:

[0017] Close the valve of the main water pipe that discharges water from the water intake pump group to the water plant;

[0018] Open the first and third control valves, keep the second control valve closed, and keep the fourth control valve open. The water intake pump group draws water from the pump station forebay and returns it to the pump station forebay through the backwash pipe to increase the liquid level difference inside and outside the pump station.

[0019] Monitor the liquid level in the forebay of the pump station, determine the flushing needs of the gravity inlet pipe based on the sediment thickness and water intake level, adjust the third control valve to control the liquid level in the forebay, and choose to close the first and third control valves according to the sediment conditions in the inlet pipe to end the flushing.

[0020] Furthermore, when the water level is high, the water pump group is used to pressurize the water to flush the pipeline. The specific steps include:

[0021] Close the valve of the main water pipe that discharges water from the water intake pump group to the water plant;

[0022] Open the first and second control valves, keep the third control valve closed, close the fourth control valve, and use the water pump group to extract water from the forebay of the pump station and send it directly back to the gravity water inlet pipe of the pump station through the backwash pipe;

[0023] The flushing demand of the gravity inlet pipe is judged by the thickness of the sediment and the influence of the pressure flushing water discharged into the river, the second control valve is adjusted to control the flushing flow rate in the pipeline, and the first control valve and the second control valve are closed according to the sediment situation in the water inlet pipe to end the flushing.

[0024] This invention utilizes the existing pump system of a shore-based water intake station, adding backwash piping and control valves to create a multi-level flushing system for the station's gravity-fed inlet pipes. The flushing system can switch operating modes based on different operating conditions to remove sediment from the inlet pipes. This allows for flexible operation based on the amount of sediment in the pipes, saving on sediment removal costs.

[0025] Compared with the prior art, the beneficial effects of the present invention are embodied in the following aspects:

[0026] 1) Efficiently utilize existing facilities, with minimal impact and investment in flushing operations.

[0027] 2) The device of the present invention is simple to operate, easy to control, and convenient to manage, and its safety is particularly outstanding.

[0028] 3) Pipeline sediments are removed significantly with good and quick results.

[0029] 4) It can be applied to pump stations of different specifications, and the device has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a plan view of the flushing device of the present invention;

[0031] Figure 2 This is a cross-sectional view of the backwash pipe connected to the pump station forebay;

[0032] Figure 3 It is a cross-sectional view of the backwash pipe connected to the gravity water inlet pipe.

[0033] Numbers in the figure: 1-4 backwash pipe; 5, backwash main pipe; 6, pump station forebay; 7, water intake pump group; 8, outlet main pipe; 9, flushing plug; 10, gravity water inlet pipe;

[0034] Control valves: 100, first control valve; 200, second control valve; 300, third control valve; 400, fourth control valve. DETAILED DESCRIPTION

[0035] The invention will be further described in detail below using specific embodiments in conjunction with the accompanying drawings. It should be noted that the descriptions of these embodiments are intended to aid understanding of the invention and do not constitute limitations of the invention. Furthermore, the technical features involved in the various embodiments of the invention described below may be combined with one another as long as they do not conflict with one another.

[0036] The device of the present invention realizes the removal of sediment in the water inlet pipe by utilizing the water output of the water intake pump room pump group, such as Figure 1 As shown. The pipe flushing system includes:

[0037] The water intake pump station includes a pump station forebay 6, a water intake pump group 7, a gravity water inlet pipe 10, a backwash main pipe 5, backwash pipes 1-4, a control system, a monitoring system and a flushing plug 9; a sediment monitoring system and a control valve are installed in the gravity water inlet pipe 10; a liquid level monitoring system is installed in the pump station forebay 6; control valves are installed in the backwash main pipe 5 and the backwash pipes 1-4; and a flow rate monitoring system is installed in the backwash pipes 1-4.

[0038] When the thickness of the sediment in the gravity pipe reaches a set value (set according to the actual situation of the system), the water inlet pipe flushing process is started. When the water level is low (the liquid level of the pump station forebay 6 can be increased to use the liquid level difference inside and outside the pump station to flush the pipe), the method for removing sediment from the gravity water inlet pipe 10 using the device of the present invention includes the following steps:

[0039] Step 1: Close the valve of the main outlet pipe of the water intake pump group 7 toward the water plant.

[0040] Step 2: Open the first control valve 100 and the third control valve 300 (as shown in FIG. Figure 2 As shown, control backwash pipes 3 and 4), keep the second control valve 200 closed (as Figure 3 As shown, the backwash pipes 1 and 2 are controlled to keep the fourth control valve 400 open.

[0041] Step three, monitor the liquid level of the pump station forebay 6, adjust the third control valve 300 according to the flushing requirements of the gravity water inlet pipe 10 (determined by the sediment thickness and water intake level), control the liquid level of the forebay, and choose to close the first control valve 100 and the third control valve 300 according to the sediment situation in the water inlet pipe to end the flushing.

[0042] When the water level is high (using the pressure of the water pump group 7 to flush the pipe), the method of using the device of the present invention to remove sediment from the gravity water inlet pipe 10 includes the following steps:

[0043] Step 1: Close the valve of the main outlet pipe of the water intake pump group 7 toward the water plant.

[0044] Step 2: Open the first control valve 100 and the second control valve 200 (as Figure 3 As shown, control backwash pipes 1 and 2), keep the third control valve 300 (as Figure 2 As shown, the backwash pipes 3 and 4 are controlled to be closed, and the fourth control valve 400 is closed.

[0045] Step 3: According to the flushing requirements of the gravity water inlet pipe 10 (determined by the thickness of the sediment and the influence of the pressure flushing water discharge into the river), adjust the second control valve 200 to control the flushing flow rate in the pipeline, and choose to close the first control valve 100 and the second control valve 200 according to the sediment conditions in the water inlet pipe to end the flushing.

[0046] The principle of the flushing method of the present invention is:

[0047] In the low water level pipeline flushing mode, the first control valve 100 is opened, the third control valve 300 and the fourth control valve 400 are opened and the second control valve 200 is closed. The water intake pump group 7 draws water from the pump station forebay 6 and sends it back to the pump station forebay 6 through the backwash pipes 3 and 4. The height difference between the water level in the pump station forebay 6 and the low water level of the water intake is used to achieve the flushing of the gravity water inlet pipe 10.

[0048] In the high water level pipeline flushing mode, the first control valve 100 is opened, the second control valve 200 is opened, and the third control valve 300 and the fourth control valve 400 are closed. At this time, due to the high water level outside the pump station, the water intake pump group 7 draws water from the pump station front pool 6 and directly sends it back to the pump station gravity water inlet pipe 10 through the backwash pipes 1 and 2. The water outlet pressure of the water intake pump group 7 is used to achieve the flushing of the gravity water inlet pipe 10.

[0049] In the present invention, the water intake pump group 7, the pump station forebay 6 and other supporting equipment are all basic facilities of a general water intake pump room and can be applied to the water inlet pipe hydraulic flushing system without special modification. The water intake pump group 7, the pump station forebay 6 and other supporting equipment can be used directly without modification.

[0050] The water inlet pipe flushing device is easy to implement during the actual construction process, does not affect the operating function of the water intake pump station, and does not occupy additional land. The device can be operated by controlling the valve switching operation to adapt to different water intake water level conditions. It is flexible to operate and reduces the impact of the flushing process on various aspects of the pump station.

[0051] The monitoring system includes pipeline sediment monitoring, pump station forebay water level monitoring, backwash pipe flow rate monitoring, etc. The control system controls each valve and can open and close the flushing process according to the pipeline sediment situation.

[0052] The above merely describes the embodiments of the present invention, and while the description is relatively specific and detailed, it should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A method for flushing sediment from the water inlet pipe of a shore-side multi-water-level combined water intake pump house, characterized in that: The flushing device has two modes: low-water-level flushing mode and high-water-level flushing mode. When the sediment monitoring system detects that the sediment thickness in the pipeline exceeds the set value, the control valve in the corresponding mode is operated according to the water intake level to start gravity water inlet pipe flushing. When the flushing is completed, the normal operation of the pump room is restored by switching the control valve. When the water level is low, the specific steps include: Close the valve of the main water pipe that discharges water from the water intake pump group to the water plant; Open the first and third control valves, keep the second control valve closed, and keep the fourth control valve open. The water intake pump group draws water from the pump station forebay and returns it to the pump station forebay through the backwash pipe to increase the liquid level difference inside and outside the pump station. Monitor the liquid level in the forebay of the pump station, determine the need for flushing the gravity inlet pipe based on the sediment thickness and water intake level, adjust the third control valve to control the liquid level in the forebay, and close the first and third control valves according to the sediment conditions in the inlet pipe to end the flushing; A shore-side multi-water-level combined water intake pump house inlet pipe sediment flushing device includes a pump station forebay, a water intake pump group, a gravity water inlet pipe, a backwash main pipe, and a backwash pipe in a water intake pump station. The device is characterized in that the end of the backwash main pipe is externally connected to an outlet main pipe, and the water intake pump group extracts water from the pump station forebay and transports it to the outlet main pipe; the backwash main pipe is divided into several backwash pipes before entering the pump station forebay, the pump station forebay is respectively connected to some backwash pipes, and the gravity water inlet pipe is respectively connected to other parts of the backwash pipes; the backwash main pipe, backwash pipe, and gravity water inlet pipe are all provided with control valves; The backwash main pipe is divided into four backwash pipes before entering the pump station forebay. The pump station forebay is connected to two backwash pipes respectively, and the gravity water inlet pipe is connected to the other two backwash pipes respectively.

2. The method for flushing sediment from the water inlet pipe of a shore-side multi-water-level combined water intake pump house according to claim 1, characterized in that: When the water intake level is low, increase the liquid level in the forebay of the pump station and use the liquid level difference inside and outside the pump station to flush the pipeline.

3. The method for flushing sediment from the water inlet pipe of a shore-side multi-water level combined water intake pump house according to claim 1, characterized in that: When the water level is high, the water intake pump group is used to discharge pressure water for pipeline flushing.

4. The method for flushing sediment from the water inlet pipe of a shore-side multi-water level combined water intake pump house according to claim 1, characterized in that: When the water level is high, the specific steps include: Close the valve of the main water pipe that discharges water from the water intake pump group to the water plant; Open the first and second control valves, keep the third control valve closed, close the fourth control valve, and use the water pump group to extract water from the forebay of the pump station and send it directly back to the gravity water inlet pipe of the pump station through the backwash pipe; The flushing demand of the gravity inlet pipe is judged by the thickness of the sediment and the influence of the pressure flushing water discharged into the river, the second control valve is adjusted to control the flushing flow rate in the pipeline, and the first control valve and the second control valve are closed according to the sediment situation in the water inlet pipe to end the flushing.

5. The method for flushing sediment from the water inlet pipe of a shore-side multi-water-level combined water intake pump house according to claim 1, characterized in that: The backwash main pipe is provided with a first control valve and a valve well, the backwash pipe connected to the gravity water inlet pipe is provided with a second control valve, the backwash pipe connected to the pump station front pool is provided with a third control valve, and the tail of the gravity water inlet pipe is provided with a fourth control valve.

6. The method for flushing sediment from the water inlet pipe of a shore-side multi-water-level combined water intake pump house according to claim 1, characterized in that: A sediment monitoring system is installed in the gravity water inlet pipe to monitor the thickness of sediment in the pipe.

7. The method for flushing sediment from the water inlet pipe of a shore-side multi-water level combined water intake pump house according to claim 1, characterized in that: A water level monitoring system is installed in the forebay of the pump station to monitor the water level in the forebay.

8. The method for flushing sediment from the water inlet pipe of a shore-side multi-water-level combined water intake pump house according to claim 1, characterized in that: A flow rate monitoring system is installed in the backwash pipe to monitor the flow rate in the pipe.

9. The method for flushing sediment from the water inlet pipe of a shore-side multi-water-level combined water intake pump house according to claim 1, characterized in that: It also includes a control system, which is connected to the sediment monitoring system, the water level monitoring system, the flow rate monitoring system and the control valve respectively.

Images