A flow device for pumping tests
By designing a flow control device and using regulating valves and return pipes to control the flow rate, the problem of unstable water flow in traditional water pumps during pumping tests was solved, achieving precise flow regulation and stability, and meeting the needs of multi-stage tests.
Patent Information
- Application Number
- CN202520242506.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-14
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-02-14
AI Technical Summary
Traditional water pumps have difficulty controlling the flow rate during pumping tests, leading to test failures, especially in aquifers with poor or weak water abundance where stable flow control is difficult to achieve.
Design a flow device including a frame, an inlet pipe, a drain pipe, a flow meter, an inlet valve, a drain valve, and a return pipe. The flow rate is controlled by adjusting the valves, and the flow meter and return pipe are combined to achieve precise adjustment and stability of the flow rate.
It achieves stable flow control and minimal fluctuations under different inflow rates, meeting the testing needs at different stages, and can acquire test data without the need for a specific water pump.
Smart Images
Figure CN224945493U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of flow detection equipment technology, and in particular to a flow device for pumping tests. Background Technology
[0002] In the investigation or exploration work of some hydrogeological, engineering geological and geotechnical engineering projects, it is necessary to conduct groundwater investigation by well pumping tests to test the following hydrogeological parameters of groundwater in a certain aquifer: inflow and corresponding drawdown, radius of influence, permeability coefficient, hydraulic conductivity, pressure transmission coefficient, elastic release coefficient, specific yield and other hydrogeological parameters.
[0003] During well pumping tests, three different drawdown phases are typically designed based on mission requirements. The proportional relationship between the water level drop depths in the three phases is: (1 / 3)*S, (2 / 3)*S, and S. At this point, it is necessary to control the water pump to perform three predetermined flow rates, from smallest to largest, so that the groundwater level in the well stabilizes approximately at the three designed drawdown depths after the initial drop.
[0004] However, the typical characteristics of a water pump's output are: a roughly fixed output with some fluctuations. Pumping tests require solving three major challenges: first, how to control the inflow rate to meet any three predetermined flow rates for any given test; second, how to stabilize any given inflow rate so that it fluctuates only within a very small range to achieve the desired test effect; and third, in aquifers with poor or weakly abundant water, the output rate of a typical water pump is very high, which could quickly drain the well water and cause the test to fail. Therefore, it is necessary to control and stabilize the inflow rate at a very small level for a three-stage test. Traditional water pumps, by directly pumping water, can hardly meet the test requirements. Therefore, there is an urgent need for a flow rate device for pumping tests to solve these problems. Utility Model Content
[0005] To address the problems associated with traditional water pump pumping tests, this application provides a flow rate device for water pumping tests.
[0006] The flow device for pumping tests provided in this application adopts the following technical solution: A flow device for pumping tests includes a frame with an inlet pipe and a drain pipe. Multiple flow meters are mounted on the frame. An inlet pipe connects the inlet end of each flow meter to the inlet pipe, and an inlet valve is installed on the inlet pipe. A drain pipe connects the outlet end of each flow meter to the drain pipe, and a drain valve is installed on the drain pipe. One end of the inlet pipe is connected to an inlet hose for connecting to the outlet end of a water pump. The end of the inlet pipe facing away from the inlet hose is connected to a return pipe for connecting to a pumping well.
[0007] By adopting the above technical solution, the worker first connects the inlet hose to the outlet of the water pump, then places the return pipe at the pumping well. Next, by adjusting the flow rates of the inlet valve and drain valve, the flow rate of the measuring flow meter is controlled. The water pump then draws water into the inlet pipe. Part of the water in the inlet pipe flows back to the pumping well via the return pipe, while the other part flows along the inlet pipe, inlet valve, measuring flow meter, drain valve, and drain pipe. The worker obtains test data by observing the flow rate of the measuring flow meter. Simultaneously, by closing part of the inlet valve, the worker can obtain test data at different flow rates and test flow fluctuation data at any given inflow rate. This process can obtain test data for different inflow rates without requiring a specific water pump.
[0008] Optionally, one end of the drain pipe is closed, a drain flow meter is installed on the frame, a drain hose is connected to the inlet end of the drain flow meter, the drain hose is used to communicate with the drain pipe, and a drain water hose is connected to the outlet end of the drain flow meter.
[0009] By adopting the above technical solution, workers can accurately control the flow rate on the drain pipe by connecting the drain hose to the drain pipe and adjusting the inlet and outlet valves corresponding to multiple flow meters, which facilitates fine-tuning by workers.
[0010] Optionally, a reflux valve is provided on the reflux pipe.
[0011] By adopting the above technical solution, workers can decide whether to open the return valve on the return pipe and whether to place the water outlet of the return pipe in the pumping well, based on the actual situation of the test. At the same time, the return valve makes it convenient for workers to control the flow of water in the inlet pipe to the liquid inlet pipe.
[0012] Optionally, the inlet hose may be detachably equipped with an adapter for connecting to the outlet end of the water pump.
[0013] By adopting the above technical solution, workers can adapt to different models of water pumps simply by changing the adapters of different sizes, which helps to improve adaptability to different water pumps.
[0014] Optionally, the flow meter is equipped with a control valve.
[0015] By adopting the above technical solution, workers can easily fine-tune the flow meter, thereby meeting the requirement of conducting tests under small-volume water flow.
[0016] In summary, this application includes at least one of the following beneficial technical effects: 1. The worker first connects the inlet hose to the outlet of the water pump, then places the return pipe at the pumping well. The flow rate of the measuring flow meter is controlled by adjusting the flow rates of the inlet and outlet valves. The water pump then draws water into the inlet pipe. Part of the water in the inlet pipe flows back to the pumping well via the return pipe, while the other part flows along the inlet pipe, inlet valve, measuring flow meter, outlet valve, and outlet pipe. The worker obtains test data by observing the flow rate of the measuring flow meter. Simultaneously, by closing some of the inlet valves, the worker can obtain test data at different flow rates and test flow fluctuation data at any given inflow rate. This process can obtain test data at different inflow rates without requiring a specific water pump. 2. Workers can decide whether to open the return valve on the return pipe and whether to place the outlet of the return pipe in the pumping well based on the actual situation of the experiment. At the same time, the return valve makes it convenient for workers to control the flow of water in the inlet pipe to the liquid inlet pipe. Attached Figure Description
[0017] Figure 1 This is a structural schematic diagram of an embodiment of this application.
[0018] Figure 2 This is a structural schematic diagram showing the positional relationship between the flow meter, control valve, and frame in an embodiment of this application.
[0019] Explanation of reference numerals in the attached diagram: 1. Frame; 2. Inlet pipe; 3. Drain pipe; 4. Measuring flow meter; 5. Liquid inlet pipe; 6. Liquid inlet valve; 7. Drain pipe; 8. Drain valve; 9. Liquid inlet hose; 10. Return pipe; 11. Drain flow meter; 12. Drain hose; 13. Drain hose; 14. Return valve; 15. Adaptor connector; 16. Control valve. Detailed Implementation
[0020] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.
[0021] This application discloses a flow device for pumping tests.
[0022] Reference Figure 1 A flow device for pumping tests includes a frame 1, an inlet pipe 2 and a drain pipe 3 connected to the frame 1, one end of the drain pipe 3 being closed, and multiple flow meters 4 connected to the frame 1, each flow meter 4 having its own control valve 16.
[0023] Reference Figure 1 , Figure 2The inlet end of the flow meter 4 is connected to the inlet pipe 2 by an inlet pipe 5, and an inlet valve 6 is attached to the inlet pipe 5. The outlet end of the flow meter 4 is connected to the drain pipe 3 by a drain pipe 7, and a drain valve 8 is attached to the drain pipe 7. One end of the inlet pipe 2 is connected to an inlet hose 9, and an adapter 15 is attached to the inlet hose 9. The adapter 15 is used to connect to the outlet end of the water pump.
[0024] Reference Figure 1 , Figure 2 One end of the inlet pipe 2 facing away from the inlet hose 9 is connected to a return pipe 10. The return pipe 10 is used to connect to the pumping well. A return valve 14 is bolted to the return pipe 10. A drain flow meter 11 is bolted to the frame 1. The inlet end of the drain flow meter 11 is connected to a drain hose 12. The drain hose 12 is used to be bolted to the end of the drain pipe 3. The outlet end of the drain flow meter 11 is connected to a drain hose 13.
[0025] The worker first connects the adapter 15 on the inlet hose 9 to the outlet end of the water pump, then places the outlet end of the return pipe 10 into the pumping well. The water pump then pumps the water in the well to the inlet pipe 2. Part of the water in the inlet pipe 2 flows back to the pumping well through the return pipe 10, and the other part flows along the direction of the inlet pipe 5, the inlet valve 6, the flow meter 4, the drain valve 8, and the drain pipe 7.
[0026] Then the worker changes the switches of the inlet valve 6 and the drain valve 8 to adjust the flow rate of the corresponding flow meter 4. At the same time, the worker fine-tunes the flow rate at the outlet of the flow meter 4 through the control valve 16 to keep the water flowing out of the drain pipe 7 at a relatively stable flow rate. The worker then obtains test data by observing the flow rate of the flow meter 4.
[0027] Afterwards, the workers closed part of the inlet valve 6 and the drain valve 8, and changed the flow rate of the drain pipe 7 to obtain test data under different flow rates. At the same time, by fine-tuning the control valve 16, the flow rate fluctuation data could be obtained under any flow rate. Then, by adjusting the flow rate and repeating the process multiple times, test data under different stages of the test could be obtained.
[0028] The implementation principle of a flow device for pumping tests according to an embodiment of this application is as follows: the worker first connects the conversion connector 15 on the inlet hose 9 to the outlet end of the water pump, and then places the outlet end of the return pipe 10 into the pumping well. After that, the water pump pumps the water in the well to the inlet pipe 2. Part of the water in the inlet pipe 2 flows back to the pumping well through the return pipe 10, and the other part of the water flows along the direction of the inlet pipe 5, the inlet valve 6, the measuring flow meter 4, the drain valve 8 and the drain pipe 7.
[0029] Then the worker changes the switches of the inlet valve 6 and the drain valve 8 to adjust the flow rate of the corresponding flow meter 4. At the same time, the worker fine-tunes the flow rate at the outlet of the flow meter 4 through the control valve 16 to keep the water flowing out of the drain pipe 7 at a relatively stable flow rate. The worker then obtains test data by observing the flow rate of the flow meter 4.
[0030] Afterwards, the workers closed part of the inlet valve 6 and the drain valve 8, and changed the flow rate of the drain pipe 7 to obtain test data under different flow rates. At the same time, by fine-tuning the control valve 16, the flow rate fluctuation data could be obtained under any flow rate. Then, by adjusting the flow rate and repeating the process multiple times, test data under different stages of the test could be obtained.
[0031] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A flow device for a pumping test, characterized in that: The device includes a frame (1), on which an inlet pipe (2) and a drain pipe (3) are installed. Multiple flow meters (4) are installed on the frame (1). The inlet end of the flow meter (4) is connected to the inlet pipe (2) via an inlet pipe (5). An inlet valve (6) is installed on the inlet pipe (5). The outlet end of the flow meter (4) is connected to the drain pipe (3) via a drain pipe (7). A drain valve (8) is installed on the drain pipe (7). One end of the inlet pipe (2) is connected to an inlet hose (9). The inlet hose (9) is used to connect to the outlet end of the water pump. The end of the inlet pipe (2) facing away from the inlet hose (9) is connected to a return pipe (10). The return pipe (10) is used to connect to a pumping well.
2. A flow device for pumping test according to claim 1, characterized in that: One end of the drain pipe (3) is closed, a drain flow meter (11) is provided on the frame (1), the inlet end of the drain flow meter (11) is connected to a drain hose (12), the drain hose (12) is used to communicate with the drain pipe (3), and the outlet end of the drain flow meter (11) is connected to a drain hose (13).
3. The flow device for pumping test according to claim 1, characterized in that: A reflux valve (14) is provided on the reflux pipe (10).
4. The flow device for pumping test according to claim 1, characterized in that: The inlet hose (9) is detachably equipped with a conversion connector (15), which is used to connect to the outlet end of the water pump.
5. The flow device for a pumping test according to claim 2, characterized in that: The flow meter (4) is equipped with a control valve (16).