Gas-water mixer for drilling and water pumping test of hydropower and hydraulic engineering

Abstract

The utility model relates to the technical field of water conservancy and hydropower construction geological survey, in particular to a gas-water mixer for a water conservancy and hydropower project drilling water pumping test, which comprises a steam-water mixer, a steam-water separator, an air pipe, a pressure measuring pipe and a sleeve. The casing pipe is arranged in a drilling well; a steam-water mixer is arranged in the sleeve; the steam-water mixer is vertically arranged in the sleeve; the bottom of the steam-water mixer communicates with a well; the top of the steam-water mixer is connected with a drain pipe; the other end of the drain pipe is connected with a steam-water separator; an air pipe is arranged beside the steam-water mixer; aeration valves are arranged at the tops of the air pipes; an aeration opening is formed in the bottom of the air pipe; the aeration opening is connected with an aeration plate; the aeration plate is arranged at the bottom of the steam-water mixer; a plurality of aeration holes are formed in the surface of the aeration plate; the problem of testing the geological dynamic water level and the water yield in the geological exploration process of water conservancy and hydropower construction is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of geological survey for water conservancy and hydropower construction, in particular to an air-water mixer used for drilling and pumping water tests in hydropower and water conservancy projects. Background Art

[0002] The two basic data obtained during the pumping test are: the water inflow, which can be directly measured by a water measuring weir or a measuring bucket; the depth drawdown, which needs to be obtained by the difference between the measured dynamic water level and the natural static water level. The working principle of air compressor pumping: when compressed air enters the borehole from the air duct, it is mixed with the water in the water lifting pipe through the mixer to form an air-water mixture. Compared with the water outside the pipe, the mixture has a lower specific gravity, so the liquid level rises under the action of the specific gravity difference inside and outside the water lifting pipe. At the same time, the compressed air mixed in the water releases energy, causing the bubbles in the water to gradually increase during the rising process. Thus, a strong "gas lift" force is formed to overcome the inertia of the liquid in the water lifting pipe to make the water column rise, to the surface, and to the nozzle, and then flow into the weir box through the air-water separator and measure the pumping volume through the triangular weir. At the same time, an electromagnetic flowmeter is installed at the outlet, and the electronic system consisting of a flowmeter + single-chip microcomputer + water volume display is used to dynamically measure the pumping volume.

[0003] As the water in the borehole is continuously brought out, the water level in the hole drops to produce a dynamic water level. When the dynamic water level is lower than the natural water level of the aquifer, a descending funnel will be formed to produce low pressure. Under the action of low pressure, when the amount of water supplied by the aquifer to the hole is equal to the amount of water left, the dynamic water level will remain stable. The depth of the dynamic water level can be measured in the pressure measuring tube with an electric water level gauge.

[0004] The type of air compressor used for the pumping test can be a diesel-powered air compressor or an electric air compressor according to the conditions of the work site. The air compressor pumping test requires air-water separation tee or air-water separation tee, air-water mixer, filter, electric water level gauge, triangular weir and other equipment and instruments. Due to the unreasonable design of the air outlet of the existing air-water mixer, the total area of ​​the air hole is small, the mixing surface of the compressed gas and water is small, and the pumping effect is not ideal. The type of air compressor used for the pumping test can be a diesel-powered air compressor or an electric air compressor according to the conditions of the work site.

[0005] The air compressor pumping test requires air-water separation tee or air-water separation tee, air-water mixer, filter, electric water level gauge, triangular weir and other equipment and instruments. Due to the unreasonable design of the air outlet of the existing air-water mixer, the total area of ​​the air hole is small, the mixing surface of the compressed gas and water is small, and the pumping effect is not ideal. Utility Model Content

[0006] The utility model aims to provide a gas-water mixer for drilling and pumping water test in hydropower and water conservancy projects, so as to solve the problem of testing geological dynamic water level and water output in the process of geological survey for water conservancy and hydropower construction.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] A gas-water mixer for drilling and pumping water tests in hydropower and water conservancy projects comprises a gas-water mixer, a gas-water separator, an air duct, a pressure measuring tube and a casing; the casing is arranged in a borehole; the gas-water mixer is arranged in the casing; the gas-water mixer is vertically arranged in the casing; the bottom of the gas-water mixer is connected to the borehole; the top of the gas-water mixer is connected to a drain pipe; the other end of the drain pipe is connected to a gas-water separator; an air duct is arranged next to the gas-water mixer; an aeration valve is arranged on the top of the air duct; an aeration port is arranged at the bottom of the air duct; the aeration port is connected to an aeration plate; the aeration plate is arranged at the bottom of the gas-water mixer; a plurality of aeration holes are arranged on the surface of the aeration plate; a pressure measuring tube is arranged on the other side of the gas-water mixer.

[0009] Furthermore, a drain valve is arranged on the drain pipe; a separator drain port is arranged at the bottom of the steam-water separator; and a separator drain valve is arranged on the separator drain port.

[0010] Furthermore, the aeration plate is an annular structure arranged on the inner wall of the steam-water mixer; and the surface of the aeration plate is provided with multiple layers of aeration holes.

[0011] Furthermore, a water level gauge is provided in the pressure measuring tube.

[0012] Furthermore, the length of the soda mixer is 0.3m-0.9m; the diameter of the soda mixer is 25mm-65mm.

[0013] Furthermore, the aeration hole is arranged in a conical structure; the diameter of the bottom pipe opening of the aeration hole is 3mm-5mm; the diameter of the top pipe opening of the aeration hole is 5mm-8mm.

[0014] Compared with the prior art, the utility model can achieve one of the following beneficial effects:

[0015] 1. A soda mixer is arranged in the casing; the soda mixer is arranged vertically in the casing; the bottom of the soda mixer is connected to the well; the top of the soda mixer is connected to a drain pipe; the other end of the drain pipe is connected to a soda separator; an air duct is arranged next to the soda mixer; an aeration valve is arranged on the top of the air duct; an aeration port is arranged at the bottom of the air duct; the aeration port is connected to an aeration plate; the aeration plate is arranged at the bottom of the soda mixer; a plurality of aeration holes are arranged on the surface of the aeration plate; a pressure measuring tube is arranged on the other side of the soda mixer, so that the soda mixer arranged in the casing can be immersed below the groundwater level through the soda mixer, and the air duct is arranged at the bottom of the soda mixer. When testing, high-pressure gas is introduced into the air duct, and the high-pressure gas is ejected from the plurality of aeration holes on the surface of the aeration plate. The gas pressure presses the water column inside the soda mixer upward, and the buffer of the soda separator is connected through the arranged drain pipe, and then the groundwater output is measured through the soda separator.

[0016] 2. The drain pipe is horizontally arranged in the drain pipe; a drain valve is arranged on the drain pipe; the other end of the drain pipe is connected to the steam-water separator; a separator drain port is arranged at the bottom of the steam-water separator; a separator drain valve is arranged on the separator drain port, so that the groundwater extracted during the test can be quickly discharged through the arranged separator drain valve, and the accuracy can be retested through the amount of groundwater released by the separator drain valve.

[0017] 3. The aeration plate is an annular structure arranged on the inner wall of the gas-water separator; the surface of the aeration plate is provided with multiple layers of aeration holes, which can improve the efficiency of aeration and water pumping through the arranged multiple layers of aeration holes, and prevent the air pressure from being insufficient to press out the water level in the gas-water mixer when the groundwater output is large. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is the structural schematic diagram of the aeration plate;

[0020] Figure 3 This is a schematic diagram of the structure of a soda mixer. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] Example 1

[0023] A gas-water mixer for drilling and pumping test of hydropower and water conservancy projects, comprising a gas-water mixer 1, a gas-water separator 2, an air duct 3, a pressure measuring tube 4 and a casing 5; the casing 5 is arranged in a well; the gas-water mixer 1 is arranged in the casing 5; the gas-water mixer 1 is vertically arranged in the casing 5; the bottom of the gas-water mixer 1 is connected to the well; the top of the gas-water mixer 1 is connected to a drain pipe 101; the other end of the drain pipe 101 is connected to the gas-water separator 2; an air duct 3 is arranged beside the gas-water mixer 1; an aeration valve 301 is arranged at the top of the air duct 3; an aeration port 302 is arranged at the bottom of the air duct 3; the aeration port 302 is connected to an aeration plate 6; the aeration plate 6 is arranged at the bottom of the gas-water mixer 1; a plurality of aeration holes 601 are arranged on the surface of the aeration plate 6; the gas-water mixer 1 A pressure measuring tube 4 is provided on the other side, which can be realized by immersing the soda mixer below the groundwater level through the soda mixer provided in the casing, and by providing an air duct at the bottom of the soda mixer, when testing, high-pressure gas is introduced into the air duct.

[0024] The high-pressure gas is ejected from multiple aeration holes on the surface of the aeration plate. The gas pressure pushes the water column inside the gas-water mixer upward, and is connected to the buffer of the gas-water separator through the set drain pipe. The groundwater output is then measured through the gas-water separator.

[0025] Example 2

[0026] On the basis of Example 1, a drain valve 102 is provided on the drain pipe 101; the other end of the drain pipe 101 is connected to the steam-water separator 2; a separator drain port 202 is provided at the bottom of the steam-water separator 2; a separator drain valve 201 is provided on the separator drain port 202, so that the groundwater extracted during the test can be quickly discharged through the provided separator drain valve, and the accuracy can be retested through the amount of groundwater released by the separator drain valve.

[0027] Example 3

[0028] On the basis of Example 1, the aeration plate 6 is an annular structure arranged on the inner wall of the soda mixer 1; the surface of the aeration plate 6 is provided with multiple layers of aeration holes 601, which can improve the efficiency of aeration and pumping through the multiple layers of aeration holes, and prevent the air pressure from being insufficient to press the water level in the soda mixer out when the groundwater output is large.

[0029] Example 4

[0030] On the basis of Example 1, a water level gauge 401 is provided in the pressure measuring tube 4, so that the depth of groundwater outflow can be quickly detected by floating the water level gauge in the pressure measuring tube.

[0031] Although the utility model is described herein with reference to a plurality of illustrative embodiments of the utility model, it should be understood that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the disclosure, drawings, and claims of the present application, various modifications and improvements may be made to the components and / or layout of the subject combination layout. In addition to the modifications and improvements made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. An air-water mixer for drilling and pumping test in hydropower and water conservancy projects, characterized by: The invention comprises a soda mixer (1), a soda separator (2), an air duct (3), a pressure measuring tube (4) and a casing (5); the casing (5) is arranged in a well; the soda mixer (1) is arranged in the casing (5); the soda mixer (1) is arranged vertically in the casing (5); the bottom of the soda mixer (1) is connected to the well; the top of the soda mixer (1) is connected to a drainage pipe (101); the other end of the drainage pipe (101) is connected to the soda separator (2); an air duct (3) is arranged beside the soda mixer (1); an aeration valve (301) is arranged at the top of the air duct (3); an aeration port (302) is arranged at the bottom of the air duct (3); the aeration port (302) is connected to an aeration plate (6); the aeration plate (6) is arranged at the bottom of the soda mixer (1); a plurality of aeration holes (601) are arranged on the surface of the aeration plate (6); and a pressure measuring tube (4) is arranged on the other side of the soda mixer (1).

2. The gas-water mixer for drilling and pumping test of hydropower and water conservancy projects according to claim 1, characterized in that: The drainage pipe (101) is provided with a drainage valve (102); the bottom of the steam-water separator (2) is provided with a separator drainage port (202); and the separator drainage port (202) is provided with a separator drainage valve (201).

3. The gas-water mixer for drilling and pumping test of hydropower and water conservancy projects according to claim 1, characterized in that: The aeration plate (6) is an annular structure and is arranged on the inner wall of the soda mixer (1); a plurality of layers of aeration holes (601) are arranged on the surface of the aeration plate (6).

4. The gas-water mixer for drilling and pumping test of hydropower and water conservancy projects according to claim 1, characterized in that: A water level gauge (401) is arranged in the pressure measuring tube (4).

5. The gas-water mixer for drilling and pumping test of hydropower and water conservancy projects according to claim 1, characterized in that: The length of the soda-water mixer (1) is 0.3 m-0.9 m; the diameter of the soda-water mixer (1) is 25 mm-65 mm.

6. The gas-water mixer for drilling and pumping test of hydropower and water conservancy projects according to claim 1, characterized in that: The aeration hole (601) is arranged in a conical structure; the diameter of the bottom pipe opening of the aeration hole (601) is 3 mm to 5 mm; the diameter of the top pipe opening of the aeration hole (601) is 5 mm to 8 mm.

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