Small double-valve pump matched with double-plug stratified sampling system

Abstract

The utility model relates to the technical field of underground water environment monitoring, in particular to a small double-valve pump matched with a double-plug stratified sampling system. Comprising a water pipe, an air pipe, a pump body, an in-pump water pipe and an air-water pipe separator, the air-water pipe separator is provided with an air-water pipe separator air inlet, an air-water pipe separator air outlet and an air-water pipe separator water outlet, one end of the water pipe penetrates through the air pipe and is inserted into the pump body, and the in-pump water pipe is arranged in the pump body. By means of the structure, sampling depth and flow can be met, and the underground water quality monitoring device can be matched with a double-plug stratified sampling system to complete underground water quality monitoring related work.

Description

Technical Field

[0001] The utility model relates to the technical field of groundwater environment monitoring, in particular to a small double-valve pump supporting a double-plug stratified sampling system. Background Art

[0002] The double-plug stratified sampling system is an accurate and efficient monitoring solution commonly used in the field of groundwater environment monitoring. It can realize stratified pumping and sampling of aquifers at any depth in a borehole with the same aperture, and at the same time, relevant parameters of water temperature and water quality of aquifers at different depths can be obtained.

[0003] However, the inner diameter of the small-diameter monitoring well pipe is about 60 mm. The outer diameter of the plug-type stratified sampling device used should be smaller than the inner diameter of the monitoring well. The inner diameter of the pipe in the system monitoring area will be even smaller, and the outer diameter of the sampling pump that can be put in can only be very small. However, the outer diameter of the commonly used submersible pump > 50 mm cannot be put into the plug-type stratified sampling device. For pumps with a diameter < 50 mm, the lift is generally below 10 meters, and monitoring wells with a depth of more than 10 meters cannot be used; the outer diameter of the airbag pump is also about 50 mm. If the outer diameter is designed too small, the volume of the bladder will be small, and the amount of sampled water will be too small; the peristaltic pump can put a water pipe with a smaller diameter into the double-plug stratified sampling device, but its lift < 10 meters, and the sampling depth is limited. Therefore, it is very necessary to propose a pump with a small outer diameter that can meet the sampling depth and flow rate to match the double-plug stratified sampling system to complete the relevant work of groundwater quality monitoring. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a small double-valve pump supporting a double-plug stratified sampling system, which can meet the sampling depth and flow rate, and match the double-plug stratified sampling system to complete the relevant work of groundwater quality monitoring.

[0005] To achieve the above purpose, a small double-valve pump supporting a double-plug stratified sampling system adopted by the utility model includes a water pipe, an air pipe, a pump body, an inner water pipe of the pump, and an air-water pipe separator. The air-water pipe separator has an air inlet of the air-water pipe separator, an air outlet of the air-water pipe separator, and a water outlet of the air-water pipe separator. One end of the water pipe penetrates through the air pipe and is inserted into the pump body. The inner water pipe of the pump is arranged inside the pump body. The end of the water pipe far from the air pipe sequentially penetrates through the air outlet of the air-water pipe separator and the water outlet of the air-water pipe separator. The air pipe is communicated with the air outlet of the air-water pipe separator.

[0006] Wherein, the small double-valve pump supporting the double-plug stratified sampling system further includes a one-way valve at the water outlet, and the one-way valve at the water outlet is arranged at the bottom of the inner water pipe of the pump.

[0007] Among them, the small double-valve pump supporting the double-embolism stratified sampling system further includes an inlet check valve, and the inlet check valve is arranged at the bottom of the pump body.

[0008] Among them, a through hole is provided at the connection between the trachea and the pump body.

[0009] For the small double-valve pump supporting the double-embolism stratified sampling system of the present utility model, the trachea and the inside of the pump body are interconnected. When the pressure inside the trachea and the pump body is greater than the water pressure at the sampling point, the inlet check valve is pressed and closed, and the water inside the trachea and the pump body pushes open the outlet check valve and flows upward through the water pipe to achieve the purpose of sampling. The inflation air pressure can reach up to 10 Mpa at most, so that the sampling depth ≤ 1000 meters; compared with the airbag pump, when the sampling water level is deeper, for two pumps of the same length, the sampling flow rate of the small double-valve pump is larger than that of the airbag pump, meeting the sampling flow rate requirements; through the above structure, the sampling depth and flow rate can be satisfied, and it can be matched with the double-embolism stratified sampling system to complete the relevant work of groundwater quality monitoring. Description of the Drawings

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0011] Figure 1 It is a schematic structural diagram of the small double-valve pump supporting the double-embolism stratified sampling system of the present utility model.

[0012] Figure 2 It is a partial schematic structural diagram of the small double-valve pump supporting the double-embolism stratified sampling system of the present utility model.

[0013] 1 - water pipe, 2 - trachea, 3 - through hole, 4 - pump body, 5 - inner pump water pipe, 6 - outlet check valve, 7 - inlet check valve, 8 - air inlet of the air-water pipe separator, 9 - air outlet of the air-water pipe separator, 10 - water outlet of the air-water pipe separator, 11 - air-water pipe separator. Detailed Embodiments

[0014] Please refer to Figure 1 and Figure 2 where Figure 1 is a schematic structural diagram of the small double-valve pump supporting the double-embolism stratified sampling system, Figure 2 is a partial schematic structural diagram of the small double-valve pump supporting the double-embolism stratified sampling system.

[0015] The utility model provides a small double-valve pump supporting a double-embolism layered sampling system, which includes a water pipe 1, an air pipe 2, a pump body 4, an inner water pipe 5 of the pump body, and a water-air separator 11. The water-air separator 11 has a water-air separator air inlet 8, a water-air separator air outlet 9, and a water-air separator water outlet 10. One end of the water pipe 1 penetrates through the air pipe 2 and is inserted into the pump body 4. The inner water pipe 5 of the pump body is arranged inside the pump body 4. The end of the water pipe 1 far from the air pipe 2 sequentially penetrates through the water-air separator air outlet 9 and the water-air separator water outlet 10. The air pipe 2 is communicated with the water-air separator air outlet 9.

[0016] In this embodiment, the end of the water pipe 1 far from the air pipe 2 penetrates into the water-air separator air outlet 9, then penetrates out of the water-air separator water outlet 10, and is hermetically connected to the water outlet of the water pipe 1. An air compressor or a high-pressure nitrogen cylinder is connected to the water-air separator air inlet 8 to input high-pressure gas. The high-pressure gas passes through the water-air separator 11, through the water-air separator air outlet 9, and into the air pipe 2. The air pipe 2 is communicated with the inside of the pump body 4. When the pressure inside the air pipe 2 and the pump body 4 is greater than the water pressure at the sampling point, the inlet check valve 7 is pressed and closed, and the water inside the air pipe 2 and the pump body 4 pushes open the outlet check valve 6 and flows upward through the water pipe 1 to achieve the purpose of sampling. The inflation air pressure can reach up to 10 Mpa, so that the sampling depth ≤ 1000 meters. Compared with the airbag pump, when the sampling water level is deeper, for two pumps of the same length, the sampling flow rate of the small double-valve pump is larger than that of the airbag pump, meeting the sampling flow rate requirements. Through the above structure, the sampling depth and flow rate can be satisfied, and it can be matched with the double-embolism layered sampling system to complete the relevant work of groundwater quality monitoring.

[0017] Further, the small double-valve pump supporting the double-embolism layered sampling system further includes an outlet check valve 6, and the outlet check valve 6 is arranged at the bottom of the inner water pipe 5 of the pump body.

[0018] In this embodiment, the outlet check valve 6 is installed at the bottom of the inner water pipe 5 of the pump body, which can prevent the water in the water pipe 1 from flowing back.

[0019] Further, the small double-valve pump supporting the double-embolism layered sampling system further includes an inlet check valve 7, and the inlet check valve 7 is arranged at the bottom of the pump body 4.

[0020] In this embodiment, the inlet check valve 7 is installed at the bottom of the pump body 4, which can prevent the water in the pump body 4 from flowing back.

[0021] Further, a through hole 3 is provided at the connection between the air pipe 2 and the pump body 4.

[0022] In this embodiment, the trachea 2 and the pump body 4 are internally connected. There is a through hole 3 at the connection between the two. When the pressure inside the trachea 2 and the pump body 4 is greater than the water pressure at the sampling point, the inlet check valve 7 is pressed tightly and closed. The water inside the trachea 2 and the pump body 4 pushes open the outlet check valve 6 and flows upward through the water pipe 1 to achieve the purpose of sampling. The inflation air pressure can reach up to 10 Mpa, enabling the sampling depth ≤ 1000 meters.

[0023] At the bottom of the water pipe 5 inside the pump body of the pump, there is an outlet check valve 6, which can prevent the water in the water pipe 1 from flowing back; at the bottom of the pump body 4, there is an inlet check valve 7, which can prevent the water in the pump body 4 from flowing back; after the water pipe 1 penetrates into the trachea 2, one end of the water pipe 1 and the trachea 2 are respectively sealed and connected to the top end of the pump body 4. The space occupied by the water pipe 1 and the trachea 2 becomes smaller, making the diameter of the small double-valve pump about 16 mm; the other end of the water pipe 1 penetrates into the air-water pipe separator outlet 9, then passes through the air-water pipe separator water outlet 10, and is hermetically connected to the air-water pipe 1 separation water outlet. An air compressor or a high-pressure nitrogen cylinder is connected to the air-water pipe separator inlet 8 to input high-pressure gas. The high-pressure gas passes through the air-water pipe separator 11, through the air-water pipe separator outlet 9 into the trachea 2. And the trachea 2 and the pump body 4 are internally connected. There is a through hole 3 at the connection between the two. When the pressure inside the trachea 2 and the pump body 4 is greater than the water pressure at the sampling point, the inlet check valve 7 is pressed tightly and closed. The water inside the trachea 2 and the pump body 4 pushes open the outlet check valve 6 and flows upward through the water pipe 1 to achieve the purpose of sampling. The inflation air pressure can reach up to 10 Mpa, enabling the sampling depth ≤ 1000 meters; compared with the airbag pump, when the sampling water level is deeper, for two pumps of the same length, the sampling flow rate of the small double-valve pump is larger than that of the airbag pump, meeting the sampling flow rate requirements.

[0024] The working process is as follows: The inlet check valve 7 is pushed open by the water pressure, and well water enters the pump body 4 and pushes open the outlet check valve 6. When the water pipe 1 is filled with water and the final liquid level position is the same as the liquid level position in the well, the outlet check valve 6 closes. At the same time, the well water will also flow through the through hole 3 to the trachea 2. Eventually, the liquid level position in the trachea 2 is also the same as the liquid level position in the well. An air compressor or a high-pressure nitrogen cylinder is connected to the air-water pipe separator inlet 8 to input high-pressure gas. The high-pressure gas passes through the air-water pipe separator 11, through the air-water pipe separator outlet 9 into the trachea 2. When the pressure inside the trachea 2 and the pump body 4 is greater than the water pressure at the sampling point, the inlet check valve 7 is pressed tightly and closed. The water inside the trachea 2 and the pump body 4 pushes open the outlet check valve 6 and flows upward through the water pipe 1 to complete the sampling work.

[0025] The above-disclosed is only a preferred embodiment of the present utility model. Of course, it cannot be used to limit the scope of rights of the present utility model. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present utility model still fall within the scope covered by the utility model.

Claims

1. A small double-valve pump for a double-stopper stratified sampling system, characterized in that: It includes a water pipe, an air pipe, a pump body, a water pipe inside the pump and an air-water pipe separator, the air-water pipe separator has an air inlet of the air-water pipe separator, an air outlet of the air-water pipe separator and a water outlet of the air-water pipe separator, one end of the water pipe passes through the air pipe and is inserted into the pump body, the water pipe inside the pump is arranged inside the pump body, the end of the water pipe away from the air pipe passes through the air outlet of the air-water pipe separator and the water outlet of the air-water pipe separator in sequence, and the air pipe is connected to the air outlet of the air-water pipe separator.

2. The small dual-valve pump for the double-embolism stratified sampling system as claimed in claim 1, characterized in that: The small double-valve pump supporting the double-stopper stratified sampling system also includes a water outlet one-way valve, and the water outlet one-way valve is arranged at the bottom of the water pipe in the pump.

3. The small dual-valve pump for the double-embolism stratified sampling system according to claim 1, characterized in that: The small double-valve pump supporting the double-embolism stratified sampling system also includes a water inlet one-way valve, and the water inlet one-way valve is arranged at the bottom of the pump body.

4. The small dual-valve pump for the double-embolism stratified sampling system according to claim 1, characterized in that: A through hole is provided at the connection between the air pipe and the pump body.

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