Extraction pipe air bag device

Abstract

The invention relates to the field of environmental protection engineering, in particular to a device used in the water pumping and air pumping process in an underground water well, and the device can divide the internal space of a well casing into two independent parts. The device comprises an extraction pipe 1, an air bag 2, a one-way valve 3, a movable rubber plug 4, a one-way valve 5, a movable rubber sheet 6 and the like. According to the device, the air bag 2 is inflated by injecting air, the outer wall of the air bag is completely attached to the extraction pipe 1, the inner space of the well casing is divided, and therefore the function of taking water / air in a layered mode is achieved. During air exhaust, the one-way valve 5 and the movable rubber sheet 6 work, the one-way valve 5 prevents air in the air bag from being exhausted out of the air bag, the movable rubber sheet 6 is opened, and water / air below the air bag in the well casing is exhausted. The existing solution is complex and high in cost. According to the device provided by the invention, time and cost can be saved, and an expected effect can be achieved.

Description

Technical Field

[0001] The invention relates to the field of environmental protection engineering, in particular to a device used in the process of pumping water and gas in a groundwater well, which can divide the inner space of a well pipe into two independent parts. Background Art

[0002] In the field of environmental protection engineering, when contaminated plots use extraction technology to repair contaminated soil and groundwater, the traditional extraction is to place the extraction tube in the well pipe and use a pump to extract groundwater or soil gas. In this process, the space in the well pipe is integrated, and the extraction process is to extract the fluid in the well pipe together. In actual remediation projects, contaminated groundwater is stratified, that is, groundwater within a certain thickness range needs to be extracted, while other groundwater does not need to be extracted; if it is the case of extracting soil gas, it is necessary to extract within a certain thickness range in the soil, while soil gas in other depth ranges does not need to be extracted. At present, there are three main solutions for the above situation: First, place the pumping pipe mouth in the well pipe within the range required for extraction, fill it with quartz sand, and use bentonite to seal other areas; second, during the installation of the well pipe, place the water stop / air plug at a specified depth, and after the well pipe is installed, the internal space of the well pipe is divided; third, an inflatable packer has two tubes in the middle of the packer, one tube is used to inflate the packer, and the other tube is used for extraction. The above methods are more complicated to operate and the cost is also higher. Once the well is built in the first and second methods, the position of the water stop cannot be changed. The third method also requires the use of an air pump, which is complex in structure. Summary of the invention

[0003] The purpose of the present invention is to provide a device that can easily divide the pipe space in the pipe. To achieve the above purpose, an embodiment of the present invention provides a device with a tubular structure, which includes: a pipe, an air inlet, a one-way valve, and an air bag. Optionally, both ends of the pipe are provided with threads or buckles to facilitate connection with other components; optionally, the one-way valve is a single or multiple or annular one-way valve; optionally, the air bag is a detachable rubber air bag.

[0004] Through the above technical scheme and device, by installing the above device somewhere in the middle of the extraction pipe in the well, gas is injected before the extraction is implemented, and the gas enters the airbag under the action of the one-way valve. Under the action of pressure, the airbag inflates and becomes larger until it fits against the well wall, dividing the well pipe into two parts, upper and lower. If necessary, the device of the present invention can be connected in series to achieve the division of multiple spaces in the well. After the airbag is inflated to divide the well pipe, extraction is carried out, and under the action of the one-way valve, the airbag remains inflated. Under the action of negative pressure, the fluid enters from the bottom of the extraction pipe and is extracted to the surface.

[0005] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings: Figure 1 is a schematic structural diagram of an extraction airbag device according to an embodiment of the present invention; Description of Reference Numerals 1 Extraction tube 2 airbags 3. Check valve 4 movable rubber stopper 5. Check valve 6Activity Film Figure 2 It is a schematic diagram of the working state under inflation according to an embodiment of the present invention, which includes not only the device of the present invention but also a well pipe 7. Figure 3 2 is a schematic diagram of the working state under the condition of exhaust according to an embodiment of the present invention. DETAILED DESCRIPTION

[0007] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0008] According to the device of the present invention, Figure 2 As shown, the extraction tube equipped with the device of the present invention is inserted into the well pipe, and gas is injected into the well pipe. Under the action of pressure, the gas pushes up the movable rubber plug 4. The gas enters the airbag 2, and the airbag is inflated to increase its volume and contact the well pipe 7. Under the action of pressure, the airbag 2 divides the well pipe 7 into two spaces, upper and lower.

[0009] After the inflation stops, the movable rubber plug 4 falls down to block the air inlet of the airbag 2. The pressure in the airbag 2 is greater than the pressure in the extraction tube 1, and the airbag 2 remains inflated, dividing the well pipe 7 into two upper and lower spaces.

[0010] In the state of vacuuming, negative pressure is formed in the extraction tube, the movable film 6 is lifted up under the action of the negative pressure, and the fluid in the well pipe enters the extraction tube.

[0011] Figure 1 1 is a schematic diagram of the structure of an extraction airbag device according to an embodiment of the present invention; the device includes an extraction tube 1, an airbag 2, a one-way valve 3, a movable rubber stopper 4, a one-way valve 5, and a movable film 6.

[0012] The optional implementation modes of the embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above implementation modes. Within the technical structure of the embodiments of the present invention, the technical scheme of the embodiments of the present invention can be subjected to various simple deformations, and these simple deformations all belong to the protection scope of the embodiments of the present invention.

[0013] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0014] In addition, various implementations of the embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed in the embodiments of the present invention.

Claims

1. An airbag device, comprising an extraction tube 1, an airbag 2, a one-way valve 3, a movable rubber stopper 4, a one-way valve 5, and a movable film 6.

2. It is characterized by: The airbag device comprises: an extraction tube and two near air outlets; an airbag wrapping a one-way valve in the extraction tube; and another one-way valve 1 is arranged on the extraction tube and below the airbag.

3. The airbag device according to claim 1, characterized in that: The airbag wraps the one-way valve, the airbag is elastic, and the connection position between the airbag and the extraction tube has good air tightness 2.

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