CN209086008U - A well pipe device for stratified sampling of groundwater - Google Patents

Abstract

The utility model discloses a kind of well casing devices for underground water stratified sampling, it includes the tube body connected by one or more well casing head and the tail, is provided with the perforative sieve pore of several groups on the side wall sustained height of well casing, every group of sieve pore is arranged in the vertical direction；Hollow annular slot is additionally provided on the inner wall of well casing, the upper and lower arms of card slot are fixed on the inner wall of well casing, and upper arm is located at the top of sieve pore, and lower arm is located at the lower section of sieve pore, so that sieve pore be enclosed wherein, there are openings for the side wall of card slot；Water check valve corresponding with every group of sieve pore is provided in card slot, opening is passed through by external operating stick to engage with water check valve, lateral rotation operating stick is sampled so that the underground water of different depth is introduced into well casing respectively so that water check valve can be slided in card slot.

Description

A well pipe device for stratified sampling of groundwater

technical field

The utility model belongs to the technical field of environmental protection, in particular to a well pipe device used for stratified sampling of groundwater.

Background technique

Groundwater pollution is a phenomenon in which groundwater quality deteriorates due to human factors. Polluted groundwater is harmful to human health, industrial and agricultural production, and ecological environment. The stratum below the surface is complex, and the groundwater flow is extremely slow. Therefore, groundwater pollution has the characteristics of pollution stratification, slow pollution migration, strong pollution concealment, and difficult restoration and treatment. Groundwater pollution differs significantly from surface water pollution: because pollutants enter the aquifer and move slowly in the aquifer, pollution often occurs gradually, and it is difficult to detect in time without special monitoring.

Most of the existing groundwater monitoring well construction devices and sampling methods can only be used to monitor a certain point and a specific aquifer. However, the concentration or pollution degree of groundwater quality at different depths at the same location is different, and mixed water samples cannot be used well. reflect groundwater conditions. In recent years, in the field of groundwater investigation and monitoring, compound wells or integrated monitoring well devices or other fixed-depth sampling devices have been developed in the field of groundwater investigation and monitoring to monitor groundwater at different depths at the same location. The structure of the monitoring well device is complex, the well construction operation requirements are high, and the well construction cost is relatively high. The groundwater collected by the fixed-depth sampling device is not an in-situ groundwater sample in the true sense. The above devices and methods are greatly affected by groundwater stratified sampling. limit.

How to better solve the in-situ stratified sampling of groundwater at different depths at the same location and scientifically and reasonably analyze groundwater quality and pollution status is an urgent problem to be solved in groundwater evaluation.

Utility model content

Purpose of the utility model: The utility model provides a well pipe device for stratified sampling of groundwater in view of the requirements of groundwater stratified sampling and related work requirements, which can effectively realize groundwater monitoring well construction and stratified sampling, improve groundwater monitoring efficiency, It saves the cost of well construction and has high practicability and promotion value.

In order to solve the above-mentioned technical problems, the technical scheme adopted by the present utility model is as follows:

A well pipe device for stratified sampling of groundwater, which comprises a pipe body connected by more than one well pipe end to end, the side wall of the well pipe is provided with several groups of penetrating sieve holes at the same height, and each group of sieve holes is along the Longitudinal arrangement; the inner wall of the well pipe is also provided with a hollow annular clamping groove, the upper and lower arms of the clamping groove are fixed on the inner wall of the well pipe, the upper arm is located above the sieve hole, and the lower arm is located below the sieve hole. The hole is enclosed in it, and the side wall of the card slot has an opening; the card slot is provided with a water stop valve corresponding to each group of sieve holes, and the external operating rod passes through the opening to engage with the water stop valve, and the operating rod is rotated laterally to The water stop valve can slide in the slot.

By driving the water stop valve to rotate, the screen hole is covered or leaked, and the groundwater outside the screen pipe at a specific depth is introduced into the well pipe, so as to sample and monitor.

Preferably, the water stop valve is a convex structure, the large mouth end is located in the slot, the small mouth end passes through the opening, and the external operating rod is engaged with the small mouth end of the water stop valve, and the operating rod is rotated laterally to make the water stop valve Can slide in the slot.

Further, the length of the operating rod can be adjusted, and the bottom of the operating rod is provided with several cross rods. The cross rods can pass through the opening to engage with the water stop valve, and the operating rod can be rotated laterally so that the water stop valve can slide in the slot.

The small mouth end of the water stop valve is provided with a groove along the longitudinal direction, and the cross bar at the bottom of the operating rod can enter the groove along the longitudinal direction and rotate laterally to drive the water stop valve to slide in the slot.

Wherein, the head and tail of the well pipe are connected by threads or casings.

Beneficial effects:

1. The device of the present invention has a simple structure and a simple layered sampling method, and has high practicability and promotion value. On the basis of the existing conventional groundwater monitoring well construction method, the device of the present invention can realize the layered sampling and Water quality monitoring;

2. The utility model controls the flow rate of groundwater entering the well pipe at the sieve hole of a certain depth by adjusting the opening and closing angle of the water stop valve, avoiding a large influx of groundwater and stirring the groundwater in the upper and lower layers of the depth, and can realize the in-situ groundwater flow at the depth. monitor.

Description of drawings

The present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments, and the advantages of the above-mentioned and/or other aspects of the present utility model will become clearer.

Figure 1 is the overall structure and sampling principle diagram of the groundwater stratified sampling device;

Figure 2 is a schematic diagram of the internal structure of the well pipe of the groundwater stratified sampling device;

Fig. 3 is the external schematic diagram of the well pipe of the groundwater stratified sampling device;

Figure 4 is a sectional view of the opening and closing principle of the water stop valve of the groundwater stratified sampling device;

Figure 5 is a top view of the opening and closing principle of the water stop valve of the groundwater stratified sampling device;

Fig. 6 is the top view structure diagram of the water stop valve of the groundwater stratified sampling device;

Fig. 7 is the structural schematic diagram of the operating rod of the groundwater stratified sampling device;

Figure 8 is a schematic diagram of the groundwater sampling detection principle at different depths of the groundwater stratified sampling device.

Detailed ways

The present invention can be better understood according to the following examples.

The structures, proportions, sizes, etc. shown in the accompanying drawings in the description are only used to cooperate with the contents disclosed in the description for the understanding and reading of those who are familiar with the technology, and are not used to limit the conditions for the implementation of the present invention. Therefore, Without technical substantive significance, any modification of structure, change of proportional relationship or adjustment of size should still fall within the scope disclosed in the present utility model without affecting the effect that the utility model can produce and the purpose that can be achieved. within the scope of the technical content. At the same time, terms such as "upper", "lower", "front", "back", "middle", etc. quoted in this specification are only for the convenience of description and clarity, and are not used to limit the implementation of the present invention. The change or adjustment of the scope and its relative relationship shall also be regarded as the applicable scope of the present invention without substantially changing the technical content.

As shown in Figures 1 to 4, the well pipe device for groundwater stratified sampling includes a pipe body formed by three well pipes 1 head end 2 and tail 3 connected by threads, and the side wall of the well pipe 1 is opened at the same height. Four groups of sieve holes 4 penetrate through, and each group of sieve holes 4 is arranged in the longitudinal direction; the inner wall of the well pipe 1 is also provided with a hollow annular clamping groove 5, and the upper and lower arms of the clamping groove 5 are fixed on the inner wall of the well pipe 1 , the upper arm is located above the sieve hole 4, and the lower arm is located below the sieve hole 4, so as to enclose the sieve hole 4, and the side wall of the card slot 5 has an opening 51; Corresponding water stop valve 6.

As shown in Figures 5 and 6, the water stop valve 6 is a convex structure, its large mouth end 61 is located in the slot 5, and the small mouth end 62 passes through the opening 51; the small mouth end 62 of the water stop valve 6 is provided with a longitudinal groove 63. The bottom cross bar 8 of the length-adjustable operating rod 9 can enter the groove 63 in the longitudinal direction.

As shown in FIG. 7 , the bottom of the operating rod 9 is provided with several cross bars 8 , and the top is provided with a handle 7 . The cross bar 8 can pass through the opening 51 and engage with the water stop valve 6 .

Push the external operating rod 9 deep into the well pipe 1, and the transverse rod 8 can pass through the opening 51 and enter the groove 63 in the longitudinal direction. After entering the groove 63 , the operating rod 9 is rotated laterally so that the water stop valve 6 slides in the clamping groove 5 and leaks out of the sieve hole 4 .

As shown in Figure 8, the device adopts the following steps to sample groundwater in layers:

Step 1: Build groundwater monitoring wells;

Step 2: according to the depth of the groundwater monitoring well, connect the well pipe 1 end to end to form a pipe body and put it into the monitoring well;

Step 3: Turn the water stop valve 6 to leak out of the sieve hole 4 through the operating rod 9 from top to bottom, clean the sieve hole 4 and the well pipe 1 one by one, and turn the water stop valve 6 in the opposite direction after cleaning to block the sieve hole 4;

Step 4: Open the water stop valve 6 at a certain depth through the operating rod 9, and the groundwater at this depth will enter the well pipe 1 through the sieve hole 4 at the depth.

To achieve in-situ groundwater sampling, the flow rate of groundwater entering the well pipe at 4 sieve holes of a certain depth is controlled by adjusting the opening and closing angle of the water stop valve 6, so as to avoid a large influx of groundwater and agitate the groundwater at the upper and lower layers of the depth. .

The present utility model provides an idea and method for a well pipe device for stratified sampling of groundwater. There are many specific methods and approaches for realizing the technical solution. The above are only the preferred embodiments of the present utility model. It should be pointed out that for For those skilled in the art, under the premise of not departing from the principles of the present invention, several improvements and modifications can also be made, and these improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims (5)

1. a kind of well casing device for underground water stratified sampling, which is characterized in that it includes by one or more well casing (1) head and the tail The tube body of connection is provided with the perforative sieve pore of several groups (4) on the side wall sustained height of well casing (1), and every group of sieve pore (4) is along longitudinal direction Arrangement；It is additionally provided on the inner wall of well casing (1) hollow annular slot (5), the upper and lower arms of card slot (5) are fixed on well casing (1) Inner wall on, upper arm is located at the top of sieve pore (4), and lower arm is located at the lower section of sieve pore (4), thus by sieve pore (4) enclose wherein, card There are opening (51) for the side wall of slot (5)；It is provided with water check valve (6) corresponding with every group sieve pore (4) in card slot (5), passes through outside Operating stick (9) pass through opening (51) engage with water check valve (6), lateral rotation operating stick (9) is so that water check valve (6) can It is slided in card slot (5).

2. a kind of well casing device for underground water stratified sampling according to claim 1, which is characterized in that affiliated sealing Valve (6) is convex shape, and big opening end (61) is located in card slot (5), and osculum end (62) pass through opening (51), passes through external behaviour Make bar (9) to engage with the osculum end (62) of water check valve (6), lateral rotation operating stick (9) is so that water check valve (6) can be in card Slot (5) sliding.

3. a kind of well casing device for underground water stratified sampling according to claim 2, which is characterized in that the operation The length of bar (9) can be adjusted, and bottom is provided with the cross bar (8) of several intersections, and cross bar (8) can pass through opening (51) and stop Water valve (6) engaging, lateral rotation operating stick (9) is so that water check valve (6) can be slided in card slot (5).

4. a kind of well casing device for underground water stratified sampling according to claim 3, which is characterized in that the sealing The osculum end (62) of valve (6) is equipped with groove (63) along longitudinal direction, and operating stick (9) bottom bar (8) can be longitudinally into groove (63) in, and lateral rotation is to drive water check valve (6) that can slide in card slot (5).

5. a kind of well casing device for underground water stratified sampling according to claim 1, which is characterized in that the well casing (1) head and the tail pass through screw thread or casing connection.