CN203376179U - Underground water sampler - Google Patents

Abstract

The utility model provides a groundwater sampler, which comprises a sampling pipe, first and second air bag plugs respectively arranged at two ports of the sampling pipe, and an inflatable and deflated air bag plug arranged between the first and second air bag plugs. The airbag, and the first check valve, wherein the first check valve runs through any one of the first and second airbag plugs and communicates with the space between the first and second airbag plugs and the first and second airbag plugs and the space outside. The water sample environment of the sampling tube in the monitoring well can be replaced with the water sample environment of fresh water, so that when the sampling tube collects water, it can collect fresh water, which can accurately and quickly reflect temporary subtle changes in groundwater quality.

Description

groundwater sampler

technical field

The utility model generally relates to a groundwater sampler.

Background technique

At present, the sampling of deep groundwater mainly uses a fixed-depth sampler, or the method of directly pumping water in the observation hole for sampling.

The patent application document with the application number 201020628171.6 discloses a layered groundwater sampler, which seals the borehole wall pipe by inflating the air bag, thereby solving the problem of depth determination in the process of groundwater sampling, but because the water sample is not a fresh water sample , so it cannot accurately reflect the sudden situation of groundwater quality, so this method can only describe the groundwater quality for a long time, but cannot reflect the changes of the groundwater system well, so the monitoring also loses the ability to prevent, prevent and control groundwater pollution. role.

Utility model content

Aiming at one or more problems in the related art, the purpose of this utility model is to provide a groundwater sampler, which provides an inflatable and deflatable airbag between the first and second airbag plugs, so that the sampling pipe can monitor The water sample environment in the well is a water sample environment that can be replaced with fresh water.

According to one aspect of the present invention, a groundwater sampler is provided, which includes a sampling pipe, a first airbag plug and a second airbag plug respectively arranged at two ports of the sampling pipe, and a first airbag plug and a second airbag plug arranged between the first airbag plug and the second airbag plug The inflatable and deflated airbag between them, and the first check valve, wherein the first check valve runs through any one of the first airbag plug and the second airbag plug and communicates with the space between the first airbag plug and the second airbag plug The space outside the first airbag plug and the second airbag plug.

Preferably, the airbag is fixedly arranged around the sampling tube, and the inflated airbag fills at least 60% of the space between the first airbag plug and the second airbag plug.

Preferably, the airbag has an integral structure or a plurality of bladders.

Preferably, it also includes a first air guide tube, which communicates with the sampling tube; a second air guide tube, which communicates with the first air bag plug and the second air bag plug; and a third air guide tube, which communicates with the air bag.

Preferably, the first airway tube and the third airway tube pass through the first airbag plug to communicate with the sampling tube and the airbag respectively, and the junction between the first airway tube and the third airway tube and the first airbag plug is sealed.

Preferably, it also includes a second check valve arranged on the sampling pipe.

Preferably, the first airbag plug and the second airbag plug are detachably fixedly connected to seal the port of the sampling tube.

Preferably, the airbag plug has a rigid thread on it that engages with and seals the port of the sampling tube.

Compared with the prior art, the utility model has the beneficial effects of:

Through the inflation and deflation of the air bag between the first air bag plug and the second air bag plug, the water sample environment of the sampling tube in the monitoring well can be replaced with the water sample environment of fresh water, so that when the sampling tube collects water, it can collect To fresh water, which can accurately and quickly reflect the temporary subtle changes in groundwater quality.

Description of drawings

The above-mentioned and/or additional aspects and advantages of the utility model will become apparent and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

Fig. 1 is the schematic diagram of groundwater sampler of the present utility model;

Fig. 2 is a schematic diagram of a preferred specific embodiment of the groundwater sampler of the present utility model

Fig. 3 is the schematic diagram of the groundwater sampler of Fig. 2 after the air bag is inflated;

Fig. 4 is a schematic diagram of the groundwater sampler in Fig. 2 after the air bag is deflated.

Detailed ways

The specific embodiment of the utility model will be described below in conjunction with the accompanying drawings.

Referring to Fig. 1, groundwater sampler of the present utility model comprises sampling pipe 8, and the first airbag plug 5 and the second airbag plug 5 ^/ are respectively arranged at two ports of sampling pipe 8; Between the first airbag plug 5 and the second airbag plug 5 ^/ ; and the first check valve 4, which runs through any one of the first airbag plug 5 and the second airbag plug 5 ^/ , and communicates with the first airbag plug 5 and the second airbag The space between the plug ⁵ and the space outside the first airbag plug 5 and the second airbag plug 5 ^/ .

The space between the first and second airbag plugs 5 and 5 ^/ is space I, and the space outside the first and second airbag plugs 5 and 5 ^/ is space II, wherein space I is the first and second airbag plugs 5 and 5 ^/ do not include the space between the air bag 6 and the sampling tube 8. Either one of the first and second airbag plugs 5 and 5 ^/ is provided with a first check valve 4 which penetrates the airbag plug at the provided position so as to communicate with space I and space II when the valve is opened. The airbag 6 is arranged between the first and second airbag plugs 5 and 5 ^/ .

Through the above-mentioned ground water sampler, the air bag 6 is inflated, the ground water existing between the first and the second air bag is discharged by the check valve 4, and the air bag 6 is deflatable again, therefore, after the air bag 6 is deflated, The groundwater will infiltrate into the space between the first and second airbags, so as to replace the existing water between the two airbags with fresh water, thereby realizing the replacement of the groundwater.

As shown in FIG. 1 , the airbag 6 is arranged around the sampling tube 8 , but it should be understood that the airbag 6 may not surround the sampling tube 8 , and this arrangement is also within the scope of the present invention. Preferably, the airbag 6 is an integral structure, but it should be understood that it can also be composed of a plurality of separated or connected balloons, for example, the balloon 6 can be composed of a plurality of valve-shaped balloons.

During the use of the utility model, the sampling tube 8 is first inflated so that there is a certain pressure in the sampling tube 8, and then it is lowered to the position of the flower tube in the monitoring well. , the water in the flower tube will not enter the sampling tube. When the sampling tube 8 is lowered to the desired depth, stop the lowering operation, and inflate the first and second air bag plugs 5 and 5 ^/ until they form a seal with the flower tube, so that the water in the space I and the water in the space II water isolated. Then, as shown in Figure 3, stop the inflation of the first and second airbag plugs 5 and ⁵ and inflate the airbag 6, so that the water in the space I is slowly discharged to the space II through the first check valve 4, preferably , the airbag 6 should fill at least 60% of the space I after inflation. After time t1, as shown in Fig. 4, stop inflating and deflate the air bag 6, under the action of pressure difference, fresh water samples from the surrounding formations flow into space I. After the time t2 passes, the sampling tube 8 is deflated, so that the fresh water sample flows into the sampling tube 8 . After time t3, the first and second airbag plugs 5 and 5 ^/ are deflated, and the seal between the first and second airbag plugs 5 and 5 ^/ and flower tubes is released, so that the sampler can be lifted to the well head, thereby Complete the sampling process. Therefore, fresh water samples can be collected into the sampling pipe, making the collected water samples more representative, thereby accurately and quickly reflecting temporary subtle changes in groundwater quality. It should be understood that the times t1, t2 and t3 should be determined according to different groundwater flow rates, monitoring well structures and hydrogeological conditions.

Taking the above use process as an example, the preferred first check valve 4 runs through the upper one of the first and second airbag plugs, wherein the definition of the upper and lower positional relationship is the same as the vertical orientation. That is, when the sampling pipe 8 is lowered to the required depth, an air bag plug that is closer to the well head of the monitoring well.

In addition, as shown in Figure 2, the groundwater sampler of the present utility model also comprises the first air duct 1, the second air duct 2 and the third air duct 3, the first air duct 1 communicates with the sampling pipe 8, the second air duct 2 Connect the first and second airbag plugs 5 and 5 ^/ , the third airway tube 3 to communicate with the airbag 6, so that the sampling tube 8, the first and second airbag plugs 5 and 5 ^/ , and the airbag are respectively connected during the above-mentioned use of the sampler. 6 inflation. It should be understood that, in order to realize the above-mentioned connection relationship, the first airway tube 1 and the third airway tube 3 should pass through one of the first and second airbag plugs 5 and 5 ^/ and be in sealing engagement with the airbag plug, so that the sampling tube can be 8 and the air bag 6 are inflated, and are sealed during the sampling process to ensure that the discharged water will not flow into the space I from the joint. It is also contemplated that an outlet control valve (not shown) could be provided on the airway tube so that inflation of the airway tube can be stopped. Preferably, the first airway tube and the third airway tube pass through the first airbag plug and communicate with the sampling tube and the airbag, and the junction between the first airway tube and the third airway tube and the first airbag plug is sealed. Here, the first airbag plug is defined as the upper one of the two airbag plugs, and the definition of upper and lower is the same as above.

In addition, the second check valve 7 can also be arranged on the sampling tube 8, and its setting position does not hinder the inflation and deflation process of the airbag 6. After the sampling pipe 8 is deflated, the fresh water sample flows into the sampling pipe 8 through the second check valve 7 under the action of the pressure difference between the inside and outside of the sampling pipe 8 .

In addition, in order to realize the positioning of the sampler during the sampling process and seal the sampling tube at the same time, the two ports of the sampling tube are respectively provided with first and second airbag plugs 5 and 5 ^/ . Further, the first and second airbag plugs 5 and ⁵ are detachably fixedly connected to the port of the sampling tube, and the port is sealed to ensure the smooth realization of the drainage process, while ensuring that the water collected by the sampling tube 8 will not leak out. Preferably, rigid threads are provided on the first and second airbag plugs 5 and 5 ^/ , which cooperate with the threads of the ports of the sampling tubes to achieve a sealed engagement. This connection method is convenient for installation and parts replacement, so the performance is better.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (8)

1. a underground water sampler, is characterized in that, comprising:

Sampling pipe (8);

The first gasbag plug (5) and the second gasbag plug (5 ^/), be separately positioned on two ports of described sampling pipe (8);

But the air bag of inflation/deflation (6), be arranged on described the first gasbag plug (5) and the second gasbag plug (5 ^/) between; And,

The first non-return valve (4), run through described the first gasbag plug (5) and the second gasbag plug (5 ^/) in any, be communicated with described the first gasbag plug (5) and the second gasbag plug (5 ^/) between space and described the first gasbag plug (5) and the second gasbag plug (5 ^/) outside space.

2. underground water sampler according to claim 1, is characterized in that,

Described air bag (6) is fixedly installed around described sampling pipe (8), and the described air bag (6) after inflation at least is full of described the first gasbag plug (5) and the second gasbag plug (5 ^/) between space 60%.

3. underground water sampler according to claim 2, is characterized in that,

Described air bag (6) is structure as a whole or is a plurality of utricules.

4. underground water sampler according to claim 1, is characterized in that,

Also comprise the first wireway (1), be communicated with described sampling pipe (8);

The second wireway (2), be communicated with described the first gasbag plug (5) and the second gasbag plug (5 ^/); And,

The 3rd wireway (3), be communicated with described air bag (6).

5. underground water sampler according to claim 4, is characterized in that,

Described the first wireway (1) and the 3rd wireway (3) run through described the first gasbag plug (5) and are communicated with described sampling pipe (8) and described air bag (6), and described the first wireway (1) and the 3rd wireway (3) seal with the junction surface of described the first gasbag plug (5).

6. underground water sampler according to claim 1, is characterized in that,

Also comprise the second non-return valve (7), be arranged on described sampling pipe (8).

7. underground water sampler according to claim 1, is characterized in that,

Described the first gasbag plug (5) and the second gasbag plug (5 ^/), seal the port of described sampling pipe (8) in the mode removably be fixedly connected with.

8. underground water sampler according to claim 7, is characterized in that,

There is the rigid thread part on described gasbag plug, with the threaded engagement of described sampling pipe (8) port, seal the port of described sampling pipe (8).

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