CN111982599A - Tandem type underground water static layered sampling device and sampling method - Google Patents

Abstract

The invention relates to a series-connected groundwater static layered sampling device and a sampling method. The device comprises: a sampling rod; a sampling bottle arranged on the sampling rod: the sampling bottle comprises a sample bottle body, a bottle stopper, a cap stopper and a driving part, and the The bottle stopper is arranged on the top of the sample bottle body and is used to seal the bottle mouth. The bottle stopper is also provided with a sample injection hole that penetrates up and down and communicates with the sampling cavity inside the sample bottle body. The position of the sample injection through hole of the bottle stopper is connected with the driving member. In normal state, the cap plug is set on the bottle plug and blocks the sample injection through hole; when taking water samples, the driving member drives the cap plug to move up and down. The sample injection through hole is exposed, so that the water sample enters the sample bottle body to complete the sampling. Compared with the prior art, the invention has the advantages of convenient installation and portability, controllable sampling depth, little disturbance to groundwater, and can accurately collect groundwater samples at a specified depth.

Description

A tandem groundwater static stratified sampling device and sampling method

technical field

The invention belongs to the technical field of groundwater sampling devices, and relates to a series-connected groundwater static layered sampling device.

Background technique

With the rapid development of industry and agriculture, the soil and groundwater environment are seriously threatened. Unreasonable storage of hazardous waste in industrial production, disorderly discharge of industrial wastewater, and excessive use of pesticides, among which harmful substances migrate into groundwater in the soil and water environment with processes such as rainfall. Groundwater is an important source of freshwater in my country, and it is particularly important to develop groundwater reasonably and safely. The monitoring of groundwater environment before development is the premise of realizing the safe utilization of groundwater, especially in the groundwater system with NAPL phase pollution. Stratified sampling is an important means to realize the scientific monitoring of groundwater.

Among the commonly used groundwater sampling methods at present, the barrel sampler is usually used. Although this sampling scheme is simple, it cannot conduct groundwater sampling at the depth and specified depth. Pumping sampling such as water pumps is also common, but it is inconvenient to carry and expensive in field work. limit its use.

Chinese patent 201811052301.3 discloses a groundwater level measurement and depth sampling device and method to provide a groundwater sampling method, but in the sampling process of different depths, it is necessary to replace sampling bins of different weights, the process is cumbersome, and it is impossible to carry out Sampling operations at multiple depths at once.

Chinese Patent 201310714102.5 discloses a collection device for groundwater at different levels, which provides a method that can achieve multi-layer water extraction, but the water environment is greatly disturbed during the downhole process. If the sampler is not sealed during the downhole process, it will lead to random mixing of groundwater of different depths, and sampling The depth control is not flexible.

Therefore, there is an urgent need for a device and method for static sampling of groundwater at different depths.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a tandem groundwater static stratified sampling device and a sampling method.

The object of the present invention can be realized through the following technical solutions:

One of the technical solutions of the present invention provides a series-connected groundwater static stratified sampling device, comprising:

sampling rod;

The sampling bottle arranged on the sampling rod: it includes a sample bottle body, a bottle stopper, a cap stopper and a driving part. The bottle stopper is arranged on the top of the sample bottle body and used to seal the bottle mouth. The sample injection through hole that penetrates up and down and communicates with the sampling cavity inside the sample bottle body. The cap plug is set at the position of the sample injection through hole of the bottle plug and is connected with the driving part. In normal state, the cap plug cover is set on the bottle The sample injection through hole is plugged and blocked; when the water sample is taken, the driving part drives the cap plug to move up and expose the sample injection through hole, so that the water sample enters the sample bottle body to complete the sampling.

Further, the driving member includes a waterproof electromagnetic coil and a tension adjustment component fixed above the cover plug, and an armature integrated with the cover plug, and the waterproof electromagnetic coil is also connected to an external power supply through a waterproof power cord, The tension adjustment assembly is connected to the cover plug and is used to apply a downward pressure to the cover plug. When sampling is required, the switch circuit composed of the waterproof power cord is controlled to be turned on, so that the waterproof electromagnetic coil is energized, and the waterproof electromagnetic coil generates a magnetic force, which attracts the armature to resist the downward pressure exerted by the tension adjustment component to lift the cover plug, so that the The groundwater sample is poured into the sample bottle. After the collection is completed, the electromagnetic force disappears, and the cover plug returns to the position under the action of elastic force to compress the sampling through hole to seal. The armature and the cover plug can be adhered and fixed as a whole through waterproof glue or the like.

Further, the tension adjustment assembly includes a tension adjustment screw fixed on the top of the cover plug with a thread and adjustable in height, and a spring with two ends respectively connecting the tension adjustment screw and the cover plug. The height of the tension adjusting screw can be adjusted, so that the magnitude of the spring force can be adjusted by adjusting the height. The main function of the spring is to exert downward pressure on the cover plug, so that it can fit and seal with the sampling through hole. The shape of the cap plug is preferably conical.

Further, the upper surface of the bottle stopper is further provided with a door-shaped frame, the cap plug is located in the door-shaped frame, and the driving member is arranged on the door-shaped frame.

Further, the bottom of the door-shaped frame forms a buffer cavity surrounding the sample injection through hole, and the setting of the buffer cavity can further reduce the influence of the water to be sampled during the lifting of the cover plug, so as to better Implement static sampling.

Further, the sampling rod is an open structure with an arc-shaped cross-section, and its material is preferably a lightweight rigid material. In this way, on the one hand, it can be conveniently installed with the sampling bottle, and at the same time, it has certain torsion resistance, and at the same time, the light weight and stability of the sampling rod can be ensured.

Further, a scale table is also processed on the outer surface of the sampling rod. Further, the ends of the sampling rods are also provided with fixed coupling holes for vertical series splicing. In this way, the sampling rods can be connected in series with different numbers of sampling rods according to different groundwater sampling depth requirements.

Further, the sampling bottle is fixed on the sampling rod by a cable tie.

The second technical solution of the present invention provides a groundwater static stratified sampling method, which is implemented by using the above-mentioned series-connected groundwater static stratified sampling device, and is characterized in that, it includes the following steps:

(1) Determine the depth of the groundwater body;

(2) According to the depth of the groundwater and the number of samples, the device assembled by the sampling rod and the sampling bottle is placed into the groundwater body to be sampled, until the top sampling bottle is completely submerged into the groundwater;

(3) After standing, open the sampling bottle so that the groundwater of the corresponding depth flows into the sampling bottle. After stabilization, close the sampling bottle to complete the sampling.

Compared with the prior art, the invention has the advantages of convenient installation and portability, controllable sampling depth, little disturbance to groundwater, and can accurately collect groundwater samples at a specified depth.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the schematic diagram of sampling rod;

Fig. 3 is the schematic diagram of sampling bottle;

Description of the marks in the figure:

1- Sampling bottle, 2- Sampling rod, 3- Scale table, 4- Buckle, 5- Fixed connection hole;

101-waterproof power cord, 102-waterproof solenoid coil, 103-fixing screw, 104-tension adjustment screw, 105-door frame, 106-armature, 107-cap stopper, 108-bottle stopper, 109-sample vial body, 110 -spring.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and provides a detailed implementation manner and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

In the following embodiments or examples, if there are no special described functional components or structures, it is indicated that they are all conventional components or conventional structures in the art.

The present invention proposes a series-connected groundwater static stratified sampling device, the structure of which is shown in Figures 1 and 3, including:

sampling rod 2;

The sampling bottle 1 arranged on the sampling rod 2: it includes a sample bottle body 109, a bottle stopper 108, a cap stopper 107 and a driving part, the bottle stopper 108 is arranged on the top of the sample bottle body 109 and used to seal its bottle mouth, The bottle stopper 108 is also provided with a sample injection through hole that penetrates up and down and communicates with the sampling cavity inside the sample bottle body 109. The cover plug 107 is capped at the position of the sample injection through hole of the bottle stopper 108 and is connected to the driving member , under normal conditions, the cap plug 107 is capped on the bottle stopper 108 and blocks the sample injection through hole; when taking a water sample, the driving member drives the cap plug 107 to move up and expose the sample injection through hole, so that the water sample is Enter the sample bottle body 109 to complete the sampling.

In a specific embodiment of the present invention, please refer to FIG. 3 again, the driving member includes a waterproof electromagnetic coil 102 and a tension adjusting component fixed above the cover plug 107 , and is connected to the cover plug 107 . The armature 106 is integrated, the waterproof electromagnetic coil 102 is also connected to an external power source through a waterproof power cord 101 , and the tension adjustment component is connected to the cover plug 107 and is used to exert a downward pressure on the cover plug 107 . When sampling is required, the switch circuit composed of the waterproof power cord 101 and the like is controlled to be turned on, so that the waterproof electromagnetic coil 102 is energized, and the waterproof electromagnetic coil 102 generates a magnetic force, which attracts the armature 106 to resist the downward pressure exerted by the tension adjustment assembly. The cap plug 107 makes the groundwater sample pour into the sample bottle body 109. After the collection is completed, the electromagnetic force disappears, and the cap plug 107 returns to press the sampling hole to seal under the action of elastic force. The armature 106 and the cover plug 107 may be adhered and fixed as a whole through waterproof glue or the like. In addition, a waterproof power cord 101 and related plugs can be attached to the sampling rod 2 .

Furthermore, the tension adjustment assembly includes a tension adjustment screw 104 threaded on the top of the cover plug 107 and adjustable in height, and a spring 110 whose two ends are respectively connected to the tension adjustment screw 104 and the cover plug 107 . The height of the tension adjusting screw 104 can be adjusted, so that the magnitude of the force acting on the spring 110 can also be adjusted by adjusting the height. The main function of the spring 110 is to exert a downward pressure on the cover plug 107 so that it can fit and seal with the sampling through hole. The shape of the cap plug 107 is preferably tapered.

In a specific embodiment of the present invention, the upper surface of the bottle stopper 108 is further provided with a door-shaped frame 105 , the cover plug 107 is located in the door-shaped frame 105 , and the door-shaped frame 105 is arranged on the door-shaped frame 105 driver.

Furthermore, the bottom of the door-shaped frame 105 forms a buffer cavity surrounding the sample injection through hole, and the setting of the buffer cavity can further reduce the influence of the water body to be sampled during the lifting process of the cover plug 107, so as to improve the efficiency of the sampling process. Good implementation of static sampling.

In a specific embodiment of the present invention, the sampling rod 2 is an open structure with an arc-shaped cross section, and the material thereof is preferably a lightweight rigid material. In this way, on the one hand, it can be conveniently installed with the sampling bottle 1 , and at the same time, it has a certain torsion resistance, and at the same time, the light weight and stability of the sampling rod 2 can be ensured.

In a specific embodiment of the present invention, a scale table 3 is also processed on the outer surface of the sampling rod 2 .

In a specific embodiment of the present invention, please refer to FIG. 2 again, the end of the sampling rod 2 is further provided with a fixed coupling hole 5 for vertical series splicing. In this way, the sampling rods 2 can be connected in series with different numbers of sampling rods according to different groundwater sampling depth requirements.

In a specific embodiment of the present invention, the sampling bottle 1 is fixed on the sampling rod 2 by a cable tie.

The present invention also provides a groundwater static stratified sampling method, which is implemented by the above-mentioned tandem groundwater static stratified sampling device, comprising the following steps:

(1) Determine the depth of the groundwater body;

(2) According to the depth of the groundwater and the sampling quantity, the device assembled by the sampling rod 2 and the sampling bottle 1 is placed into the groundwater body to be sampled, and the top sampling bottle 1 is completely submerged into the groundwater;

(3) After standing, open the sampling bottle 1, so that the groundwater of the corresponding depth flows into the sampling bottle 1, and after stabilization, close the sampling bottle 1 to complete the sampling.

The above embodiments may be implemented individually, or may be implemented in any two or more combinations.

The above embodiments will be described in more detail below with reference to specific embodiments.

Example 1:

This embodiment proposes a series-connected groundwater static stratified sampling device, the structure of which is shown in Figures 1 and 3, including:

sampling rod 2;

The sampling bottle 1 arranged on the sampling rod 2: it includes a sample bottle body 109, a bottle stopper 108, a cap stopper 107 and a driving part. The bottle stopper 108 is arranged on the top of the sample bottle body 109 and used to seal its bottle mouth. 108 is also provided with a sampling through hole that penetrates up and down and communicates with the sampling cavity inside the sample bottle body 109. A cap plug 107 is covered at the position of the sampling through hole of the bottle stopper 108, and is connected with the driving member. The stopper 107 is capped on the bottle stopper 108 and blocks the sample injection through hole; when taking a water sample, the driving member drives the cap plug 107 to move up and expose the sample injection through hole, so that the water sample enters the sample bottle body 109 to complete the sampling .

Referring again to FIG. 3 , the driving member includes a waterproof electromagnetic coil 102 and a tension adjustment component fixed above the cover plug 107 , and an armature 106 integrally connected with the cover plug 107 , and the waterproof electromagnetic coil 102 is also connected by a waterproof power cord 101 . The external power supply, the tension adjustment assembly is connected to the cap plug 107 and is used to exert a downward pressure on the cap plug 107 . When sampling is required, the switch circuit composed of the waterproof power cord 101 and the like is controlled to be turned on, so that the waterproof electromagnetic coil 102 is energized, and the waterproof electromagnetic coil 102 generates a magnetic force, which attracts the armature 106 to resist the downward pressure exerted by the tension adjustment assembly. The cap plug 107 makes the groundwater sample pour into the sample bottle body 109. After the collection is completed, the electromagnetic force disappears, and the cap plug 107 returns to press the sampling hole to seal under the action of elastic force. The armature 106 and the cover plug 107 can be adhered and fixed as a whole through waterproof glue or the like.

Referring again to FIG. 3 , the tension adjusting assembly includes a tension adjusting screw 104 threaded on the top of the cover plug 107 and adjustable in height, and a spring 110 having two ends connected to the tension adjusting screw 104 and the cover plug 107 respectively. The height of the tension adjusting screw 104 can be adjusted, so that the magnitude of the force acting on the spring 110 can also be adjusted by adjusting the height. The main function of the spring 110 is to exert a downward pressure on the cover plug 107 so that it can fit and seal with the sampling through hole. The shape of the cap plug 107 is preferably tapered.

Please refer to FIG. 3 again, the top surface of the bottle stopper 108 is further provided with a door-shaped frame 105, the cover plug 107 is located in the door-shaped frame 105, and the waterproof electromagnetic coil 102, the tension adjustment screw 104, etc. are arranged on the door-shaped frame 105 to drive part structure. The door-shaped frame 105 can be fixed on the bottle stopper 108 by fixing screws 103 or the like.

Referring to FIG. 3 again, the bottom of the door-shaped frame 105 forms a buffer cavity surrounding the sample injection through hole. The setting of the buffer cavity can further reduce the influence of the water body to be sampled during the lifting process of the cover plug 107, so as to better implementation of static sampling.

Referring again to FIG. 1 , the sampling rod 2 is an open structure with an arc-shaped cross-section, and the material thereof is preferably a lightweight rigid material. In this way, on the one hand, it can be conveniently installed with the sampling bottle 1 , and at the same time, it has a certain torsion resistance, and at the same time, the light weight and stability of the sampling rod 2 can be ensured. A scale table 3 is also processed on the outer surface of the sampling rod 2 .

Referring to Fig. 2 again, the end of the sampling rod 2 is further provided with a fixed coupling hole 5 for vertical series splicing. In this way, the sampling rods 2 can be connected in series with different numbers of sampling rods according to different groundwater sampling depth requirements.

The sampling bottle 1 is fixed on the sampling rod 2 by a cable tie.

Based on the above-mentioned tandem groundwater static stratified sampling device, this embodiment also provides a groundwater static stratified sampling method, comprising the following steps:

(2) According to the depth of the groundwater and the sampling quantity, the device assembled by the sampling rod 2 and the sampling bottle 1 is placed into the groundwater body to be sampled, and the top sampling bottle 1 is completely submerged into the groundwater;

(3) After standing, open the sampling bottle 1, so that the groundwater of the corresponding depth flows into the sampling bottle 1, and after stabilization, close the sampling bottle 1 to complete the sampling.

(1) Determination of groundwater level

Determine the groundwater level in the borehole through the water level gauge as the basic data; prepare the rope of the corresponding length, etc.

(2) Assembly of sampling rod 2 and sampling bottle 1

According to the depth of groundwater to be sampled and the number of samples, different number of standard length sampling rods 2 are connected in series, and the sampling bottle 1 is fixed on the sampling rod 2 by a cable tie. The distance corresponds to the groundwater sample of a specific depth that needs to be collected; at the same time, the waterproof power cord 101 of each sampling bottle 1 is fixed on the buckle 4 of the sampling rod 2 and the number is arranged in order to control the valve of each sampling bottle 1 individually. switch.

(3) Go down to get water

Connect the rope to the top of the sampling rod 2, and slowly put the assembled sampling rod 2 and the sampling bottle 1 into the well, so that the top of the first sampling pipe completely enters the groundwater. After standing for a period of time, the waterproof electromagnetic coil 102 is energized, the sampling through hole of the sample bottle body 109 is opened, and the groundwater of the corresponding depth slowly flows into the bottle.

(4) Lift the sampling device

After the sampling is completed, slowly lift the sampling device to the ground, remove the sampling rod 2 and sampling bottle 1, and sort the water samples at the corresponding depth after marking and send them for inspection as required.

(5) Cleaning the sampling bottle

After the water sample is taken out, clean the sampling bottle 1 and wait for the next sampling operation.

The foregoing description of the embodiments is provided to facilitate understanding and use of the invention by those of ordinary skill in the art. It will be apparent to those skilled in the art that various modifications to these embodiments can be readily made, and the generic principles described herein can be applied to other embodiments without inventive step. Therefore, the present invention is not limited to the above-mentioned embodiments, and improvements and modifications made by those skilled in the art according to the disclosure of the present invention without departing from the scope of the present invention should all fall within the protection scope of the present invention.

Claims (10)

1. A tandem type groundwater static layering sampling device is characterized by comprising:

a sampling rod;

a sampling bottle disposed on the sampling wand: the sampling bottle comprises a sample bottle body, a bottle plug, a cover plug and a driving piece, wherein the bottle plug is arranged at the top of the sample bottle body and used for sealing a bottle opening of the sample bottle body; when taking a water sample, the driving piece drives the cover plug to move upwards and expose the sample introduction through hole, so that the water sample enters the sample bottle body to finish sampling.

2. A tandem groundwater static stratified sampling apparatus as claimed in claim 1, wherein the driving member comprises a waterproof electromagnetic coil and a tension adjusting member fixed above the lid plug, and an armature integrally connected to the lid plug, the waterproof electromagnetic coil is further connected to an external power source through a waterproof power line, and the tension adjusting member is connected to the lid plug and is used for applying a down pressure to the lid plug.

3. The tandem groundwater static stratified sampling device according to claim 2, wherein the tension adjusting assembly comprises a tension adjusting screw which is fixed above the lid plug in a threaded manner and is adjustable in height, and a spring which is connected with the tension adjusting screw and the lid plug at two ends respectively.

4. A serially connected groundwater static stratified sampling apparatus as claimed in claim 1, wherein the upper surface of the bottle stopper is further provided with a gate-shaped frame, the cover stopper is positioned in the gate-shaped frame, and the driving member is arranged on the gate-shaped frame.

5. The tandem groundwater static stratified sampling apparatus as claimed in claim 4, wherein the bottom of the gate frame forms a buffer cavity surrounding the sample introduction through hole.

6. The tandem groundwater static stratified sampling device of claim 1, wherein the sampling rod is an open structure with an arc-shaped cross section.

7. The tandem groundwater static stratified sampling apparatus of claim 1, wherein a scale is further processed on an outer surface of the sampling rod.

8. The tandem groundwater static stratified sampling apparatus as claimed in claim 1, wherein the sampling bottle is fixed to the sampling rod by a binding tape.

9. The tandem groundwater static stratified sampling device of claim 1, wherein the end of the sampling rod is further provided with a fixed coupling hole for vertical tandem splicing.

10. A method for static stratified sampling of groundwater, which is carried out using the tandem-type groundwater static stratified sampling apparatus as claimed in any one of claims 1 to 9, characterized by comprising the steps of:

(1) determining the depth of the underground water body;

(2) according to the depth and sampling quantity of underground water, a device assembled by a sampling rod and sampling bottles is placed into the underground water body to be sampled until the uppermost sampling bottle is completely submerged into the underground water;

(3) after standing, the sampling bottle is opened, so that the groundwater with the corresponding depth flows into the sampling bottle, and after stabilization, the sampling bottle is closed, and sampling is completed.

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