A groundwater sampler

Abstract

This utility model provides a groundwater sampler, comprising an inner tube and an outer tube that are nested together. The inner tube can move axially within the outer tube. The inner tube has openings at both ends along its own axial direction. The outer tube has an opening at one end and a closed end along its own axial direction. A through hole is formed on the circumferential sidewall of the outer tube. A valve is provided on the inner tube to seal or open the opening of the inner tube away from the closed end of the outer tube. This solves the problems of high construction cost, complex maintenance and management, and insufficient sampling flexibility of existing sampling wells.

Description

Technical Field

[0001] This utility model relates to the field of groundwater sampling technology. More specifically, it relates to a groundwater sampler. Background Technology

[0002] To meet the monitoring requirements of the ranch's groundwater environment, it is currently necessary to construct concrete sampling wells in the upstream, midstream, and downstream sections of the ranch's watershed for regular collection and analysis of groundwater samples to assess potential pollution risks. However, this proposed solution has the following problems: High construction costs; the construction cost of a single sampling well is approximately 50,000 yuan, and the total investment for three wells can reach around 150,000 yuan. For a monitoring system requiring long-term operation, the initial investment is excessive. Complex maintenance and management; professional personnel are required to regularly visit the site for well maintenance, resulting in high labor and time costs. Insufficient sampling flexibility; once the concrete sampling wells are built, their sampling locations are permanently fixed and cannot be dynamically adjusted according to actual hydrogeological changes or pollution diffusion. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a groundwater sampler to solve the issues of high construction costs, complex maintenance and management, and insufficient sampling flexibility of existing sampling wells.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model provides a groundwater sampler, comprising:

[0006] An inner and outer pipe fitting that are nested together; the inner pipe fitting can move axially within the outer pipe fitting;

[0007] The inner tube is open at both ends along its own axial direction; the outer tube is open at one end along its own axial direction and closed at the other end.

[0008] The outer tube has a through hole on its circumferential sidewall; the inner tube is provided with a valve for sealing or opening the opening of the inner tube away from the closed end of the outer tube.

[0009] A preferred embodiment is that the closed end of the outer tube has a conical structure.

[0010] A preferred embodiment is that an annular gap is formed between the inner and outer tubing.

[0011] A preferred embodiment is that the valve includes a valve body disposed at the upper opening of the inner pipe fitting, an opening and closing element disposed within the valve body, and a valve stem for driving the opening and closing element to block or open the upper opening of the inner pipe fitting.

[0012] A preferred embodiment is that the outer tube has a plurality of through holes arranged along the axial direction of the outer tube.

[0013] The preferred option is that the spacing between adjacent through holes is 10 centimeters.

[0014] A preferred embodiment is that the length of the inner tube is greater than the length of the outer tube.

[0015] A preferred embodiment is that the outer diameter of the inner tube is smaller than the inner diameter of the outer tube.

[0016] A preferred embodiment is that the outer pipe fitting includes a water storage section located in the groundwater layer, a middle section located in the underground soil layer, and an extension section extending above the ground surface; the closed end and the through hole of the outer pipe fitting are both formed in the water storage section, and the open end of the outer pipe fitting is formed in the extension section.

[0017] The preferred embodiment is that both the inner and outer tubing are made of stainless steel or galvanized round tubing.

[0018] The beneficial effects of this utility model are as follows:

[0019] This invention utilizes an interlocking inner and outer pipe fitting to create a vacuum within the inner fitting during sampling. The inner fitting then extracts the water sample from the outer fitting, enabling convenient groundwater sample collection. This invention requires only two interlocking pipe fittings for precise sampling, significantly improving sampling efficiency and convenience. Furthermore, its simple overall structure and low manufacturing cost make it easy to carry and transport. It supports flexible sampling modes, allowing the outer fittings to be moved to change sampling points, or the outer fittings to be fixed at different sampling points, requiring only the inner fittings to be carried to each sampling point. This sampler requires minimal maintenance, significantly reducing on-site maintenance frequency and saving manpower and time costs. Attached Figure Description

[0020] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0021] Figure 1 This is one of the structural schematic diagrams of this utility model.

[0022] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0023] Figure 3 This is the second structural schematic diagram of this utility model.

[0024] Reference numerals: 1. Inner pipe fitting; 2. Outer pipe fitting; 21. Through hole; 22. Closed end; 3. Valve; 31. Valve body; 32. Valve stem; 33. Handle. Detailed Implementation

[0025] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0026] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0027] Technologies and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such technologies and equipment should be considered part of the specification.

[0028] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0030] To address the problems existing in current technologies, this utility model provides a groundwater sampler, combined with... Figures 1 to 3 As shown, specifically, the groundwater sampler includes an inner pipe fitting 1 and an outer pipe fitting 2 that are nested together, with the outer pipe fitting 2 fitted outside the inner pipe fitting 1. The inner pipe fitting 1 can move axially within the outer pipe fitting 2 to take samples. More specifically, the inner pipe fitting 1 has openings at both ends along its own axial direction, with the upper opening being a first opening and the lower opening being a second opening. The outer pipe fitting 2 has an opening at one end along its own axial direction and is closed at the other end, with the upper opening being a third opening and the lower end being closed. A through hole 21 is formed on the circumferential sidewall of the outer pipe fitting 2 to allow groundwater to flow into the outer pipe fitting 2 through the through hole 21 for sampling by the inner pipe fitting 1. The inner pipe fitting 1 is equipped with a valve 3 for sealing or opening the opening of the inner pipe fitting 1 away from the closed end 22 of the outer pipe fitting 2. In other words, the valve 3 is located at the upper opening of the inner pipe fitting 1, allowing for the sealing or opening of the upper opening. This sampler can conveniently and accurately sample groundwater using only two connected pipe fittings. It is convenient, fast, efficient, low-cost, easy to transport and carry, and offers high sampling flexibility, eliminating the need for frequent on-site equipment maintenance.

[0031] To facilitate the insertion of the lower end of the outer pipe fitting 2 into the groundwater layer, the closed end 22 of the outer pipe fitting 2 is conical. Setting the lower end of the outer pipe fitting 2 as conical enhances its ability to penetrate underground soil layers, thereby accelerating the installation speed and improving work efficiency. Specifically, the lower end of the outer pipe fitting 2 is machined into a conical structure with a certain taper. The cone angle of the cone head is preferably 30°-45°, ensuring sufficient structural strength while effectively reducing penetration resistance. The outer surface of the conical end can be hardened or welded with a wear-resistant alloy layer to enhance its penetration ability. This conical structure design has multiple advantages: First, its sharp head can effectively break up small obstacles in the soil layer, reducing frictional resistance during penetration; second, the streamlined profile guides the surrounding soil to naturally disperse, avoiding excessive lateral earth pressure; third, the conical structure helps maintain the verticality of the pipe fitting, preventing deflection during penetration. In addition, this design can significantly reduce disturbance to the surrounding strata, which helps to maintain the original permeability characteristics of the groundwater layer.

[0032] In one specific embodiment, when the inner tube 1 is inserted into the outer tube 2, an annular gap is formed between the inner tube 1 and the outer tube 2. The lower end of the inner tube 1 is inserted into the outer tube 2 through a third opening. The inner tube 1 and the outer tube 2 are two independent components, which are very convenient to assemble and disassemble. Moreover, when one of the tubes is damaged, only the damaged tube needs to be replaced, saving costs.

[0033] In one specific embodiment, valve 3 is a quarter-valve, comprising a valve body 31 disposed at the upper opening of the inner pipe fitting 1, an opening / closing element disposed within the valve body 31, and a valve stem 32 for driving the opening / closing element to block or open the upper opening of the inner pipe fitting 1. A handle 33 is also provided on the valve stem 32 for turning the valve stem 32 to control the opening / closing element. Specifically, the valve body 31 is fixedly installed at the upper opening of the inner pipe fitting 1 via a flange connection or threaded connection, and its interior has a precision-fitted valve seat sealing surface. The opening / closing element preferably adopts a conical plug or flat gate structure, made of corrosion-resistant metal or engineering plastic, and its sealing surface is inlaid with an elastic sealing ring to ensure good sealing performance. The valve stem 32 adopts a trapezoidal thread transmission mechanism, with its lower end rigidly connected to the opening / closing element via a pin, and its upper end extending to the outside of the valve body 31 and equipped with a handle 33. The handle 33 has anti-slip texture on its surface. By applying a small rotational torque, the operator can drive the valve stem 32 to make precise axial displacement, thereby driving the opening and closing parts to achieve reliable sealing contact or rapid disengagement with the valve seat 31, thus effectively controlling the opening and closing state of the upper opening of the inner tube 1.

[0034] To ensure the structural strength of the outer pipe fitting 2, and to accelerate the flow of water samples into the outer pipe fitting 2, several through holes 21 are formed on the outer pipe fitting 2, arranged along its axial direction. More specifically, the spacing between adjacent through holes 21 is 10 cm, and the diameter of the through holes 21 is set to 1 cm.

[0035] In one specific embodiment, the length of the inner pipe fitting 1 is greater than the length of the outer pipe fitting 2, and the outer diameter of the inner pipe fitting 1 is smaller than the inner diameter of the outer pipe fitting 2. Further, the outer pipe fitting 2 is a 4.5-meter-long, 9-centimeter-diameter stainless steel or galvanized round pipe; the inner pipe fitting 1 is a 5-meter-long, 2.5-centimeter-diameter stainless steel or galvanized round pipe. The manufacturing cost of the sampler using the above-mentioned pipe fittings is 0.15 million yuan, which saves 14.85 million yuan compared to constructing concrete sampling wells in the upstream, midstream, and downstream sections of the pasture watershed.

[0036] In one specific embodiment, the outer pipe fitting 2 includes a water storage section located in the groundwater layer, a middle section located in the underground soil layer, and an extension section extending above the ground surface. The closed end 22 and the through hole 21 of the outer pipe fitting are both formed in the water storage section, and the open end of the outer pipe fitting 2 is formed in the extension section. That is, the lower end of the outer pipe fitting 2 is the lower end of the water storage section, and the upper end of the outer pipe fitting is the upper end of the extension section. The water storage section, the middle section, and the extension section are connected sequentially from bottom to top.

[0037] The specific sampling process using the sampler provided by this utility model is as follows: The closed end 22 of the outer pipe 2 is inserted downward through the underground soil layer into the groundwater layer, with part of the outer pipe 2 remaining above the ground. The water in the groundwater layer flows into the outer pipe 2 through the through hole 21. The valve 3 is closed to block the first opening, and the lower end of the inner pipe 1 is inserted into the outer pipe 2 through the third opening and gradually extended to the position where the groundwater sample is stored in the outer pipe 2. The valve 3 is opened, and water is forced into the inner pipe 1 by the pressure difference between the inside and outside water. After enough water sample is stored in the inner pipe 1, the valve 3 is closed, and a vacuum is formed in the inner pipe 1. The inner pipe 1 is taken out from the outer pipe 2, and the first opening of the inner pipe 1 is aligned with the sampling cup. The valve 3 is opened, and the water sample stored in the inner pipe flows into the sampling cup through the first opening. The sample is then taken and sent for testing.

[0038] In summary, this invention utilizes the interlocking inner and outer pipe fittings to create a vacuum within the inner pipe fitting during sampling. The inner pipe fitting then extracts the water sample from the outer pipe fitting, enabling convenient groundwater sample collection. This invention requires only two interlocking pipe fittings to complete precise sampling, significantly improving sampling efficiency and convenience. Furthermore, its simple overall structure and low manufacturing cost make it easy to carry and transport. It supports flexible sampling modes, allowing the outer pipe fittings to be moved to change sampling points, or the outer pipe fittings to be fixed at different sampling points, requiring only the inner pipe fittings to be carried to each sampling point. This sampler requires minimal maintenance, significantly reducing on-site maintenance frequency and saving manpower and time costs.

[0039] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A groundwater sampler, characterized in that, include: An inner and outer pipe fitting that are nested together; the inner pipe fitting can move axially within the outer pipe fitting; The inner tube is open at both ends along its own axial direction; the outer tube is open at one end along its own axial direction and closed at the other end. The outer tube has a through hole on its circumferential sidewall; the inner tube is provided with a valve for sealing or opening the opening of the inner tube away from the closed end of the outer tube.

2. The groundwater sampler according to claim 1, characterized in that, The closed end of the outer tube has a conical structure.

3. The groundwater sampler according to claim 1, characterized in that, An annular gap is formed between the inner and outer tubing.

4. The groundwater sampler according to claim 1, characterized in that, The valve includes a valve body disposed at the upper opening of the inner pipe fitting, an opening and closing element disposed within the valve body, and a valve stem for driving the opening and closing element to block or open the upper opening of the inner pipe fitting.

5. The groundwater sampler according to claim 1, characterized in that, The outer tube has several through holes arranged along its axial direction.

6. The groundwater sampler according to claim 5, characterized in that, The spacing between adjacent through holes is 10 centimeters.

7. The groundwater sampler according to claim 1, characterized in that, The length of the inner tube is greater than the length of the outer tube.

8. The groundwater sampler according to claim 7, characterized in that, The outer diameter of the inner pipe is smaller than the inner diameter of the outer pipe.

9. The groundwater sampler according to claim 1, characterized in that, The outer pipe fitting includes a water storage section located in the groundwater layer, a middle section located in the underground soil layer, and an extension section extending above the ground surface; the closed end and through hole of the outer pipe fitting are both formed in the water storage section, and the open end of the outer pipe fitting is formed in the extension section.

10. The groundwater sampler according to claim 1, characterized in that, Both the inner and outer tubing are made of stainless steel or galvanized round tubing.

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