Water stop ring and underground water monitoring system

Abstract

The utility model discloses a water stop ring and an underground water monitoring system, the water stop ring is sleeved on a water pipe joint, the water stop ring comprises a water swelling material and a protective film, and the protective film is coated on the outer side of the swelling material; the multi-layer underground water monitoring system comprises a plurality of pressure measuring units which are connected in series through pressure measuring pipes with the same number, each pressure measuring unit is provided with a side water inlet, the inlet ends of the pressure measuring pipes are communicated with the side water inlets in the pressure measuring units in a one-to-one correspondence mode, and each pressure measuring unit is sleeved with a water stop ring. And the water stop rings are arranged above and below the side water inlet of the pressure measuring unit. Compared with a traditional water stopping mode through backfilling clay balls, the water stopping ring with the expansion materials is adopted for stopping water in a water swelling mode, use is more convenient, water stopping is more accurate, and performance is more reliable. Compared with a traditional water stopping mode that the Parker rubber ring is tightly attached to the hole wall through strong air pressure by means of expansion after inflation, the system is simple in structure and lower in cost.

Description

Technical Field

[0001] This utility model relates to the field of groundwater well installation technology, specifically to a water-stop ring and a groundwater monitoring system. Background Technology

[0002] In multi-level groundwater monitoring systems, to ensure there is no vertical hydraulic connection between monitoring points, it is necessary to add sealing materials or packers between the monitoring points or sampling ports. Traditional sealing methods involve backfilling the borehole with clay or bentonite balls, but accurately placing these balls in deep boreholes is very challenging. Pre-wrapping pre-fabricated packers filled with clay or bentonite balls around the well casing can solve this problem, but managing these packers is very difficult. Some packers can achieve sealing by inflating with air, but inflatable systems are complex and expensive. Utility Model Content

[0003] To address the water-stopping problem in current multi-layer groundwater monitoring systems, this invention provides a water-stopping ring and groundwater monitoring system that can be easily fitted around the well pipe to ensure that the water-stopping ring will not cause any pollution to the groundwater.

[0004] The present invention adopts the following technical solution:

[0005] On the one hand, this utility model provides a water-stop ring, which is fitted onto the water pipe joint. The water-stop ring is characterized in that it includes a water-swellable material and a protective film, and the protective film is applied to the outside of the swelling material and is a semi-permeable membrane layer.

[0006] Preferably, the expandable material expands to 2-6 times its original volume when it comes into contact with water.

[0007] Preferably, the expanding material is rubber.

[0008] On the other hand, this utility model also provides a groundwater monitoring system, the system including at least one pressure measuring unit, multiple pressure measuring units connected in series by an equal number of pressure measuring pipes, each pressure measuring unit having a side inlet, the inlet end of the pressure measuring pipe being uniquely connected to the side inlet on the pressure measuring unit, each pressure measuring unit being fitted with the aforementioned water-stop ring, the water-stop ring being positioned above and below the side inlet of the pressure measuring unit.

[0009] Furthermore, the pressure measuring unit includes a sleeve and a water pipe connector arranged vertically, the sleeve and the water pipe connector being connected through the pressure measuring tube, the sleeve being fitted with anti-expansion rings arranged at intervals, the water-stop ring being fitted on the sleeve between the two anti-expansion rings, and the water pipe connector having a side water inlet on its outer side, the side water inlet being connected to one of the pressure measuring tubes.

[0010] Furthermore, the sleeve is provided with a plurality of through holes through which the pressure measuring tube passes, and the diameter of the through holes is adapted to the outer diameter of the pressure measuring tube.

[0011] Preferably, multiple pressure measuring units are connected in series through the pressure measuring pipe and placed in the underground area to be monitored, with each water pipe joint located at a corresponding underground monitoring point.

[0012] Furthermore, each pressure measuring unit has a sleeve with the same number of through holes as the pressure measuring unit.

[0013] Furthermore, the monitoring system formed by connecting multiple pressure measuring units in series through the pressure measuring tube is also provided with a top cover and a conical bottom cover at the bottom of the monitoring system.

[0014] The technical solution of this utility model has the following advantages:

[0015] A. Compared with the traditional method of sealing water by backfilling with clay balls, this utility model uses a water-sealing ring with an expanding material to expand and seal water when exposed to water. It is more convenient to use, more precise in sealing water, and more reliable in performance. Compared with the traditional method of sealing water by expanding after inflation and using strong air pressure to make the Parker rubber ring tightly adhere to the hole wall, this utility model has a simpler system structure and lower cost.

[0016] B. The water-stop rings used in this utility model system will not pollute groundwater. They can be used in traditional water supply wells or in multi-layer monitoring systems to monitor water layers at different depths. The water-stop rings on each pressure measuring unit of the system can effectively limit vertical expansion, resulting in better water isolation between different groundwater layers. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model, the drawings used in the specific embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the cross-section of the waterstop ring provided by this utility model;

[0019] Figure 2 This is a diagram showing the usage status of the waterstop ring provided by this utility model;

[0020] Figure 3 A schematic diagram of the pressure measuring unit in the monitoring system provided by this utility model;

[0021] Figure 4 A diagram illustrating the five-layer monitoring system provided by this utility model.

[0022] The diagram is labeled as follows:

[0023] 1-Pressure measuring tube

[0024] 2-Waterstop ring

[0025] 21-Expansion material, 22-Protective film

[0026] 3-Pressure Measurement Unit

[0027] 31-Casing, 32-Water pipe fitting, 33-Expansion ring

[0028] a-Side inlet, b-Through hole

[0029] 4-Top cover; 5-Bottom cover. Detailed Implementation

[0030] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] like Figure 1 As shown, this utility model provides a water-stop ring, which is fitted onto a water pipe connector 32. The water-stop ring 2 includes a water-swellable material 21 and a protective membrane 22. The protective membrane 22 is applied to the outside of the swelling material 21 and is a semi-permeable membrane layer. When water passes through the protective membrane 22, the swelling material 21 absorbs water, preferably rubber. The swelling material 21 gradually expands after about 2 hours, with a final expansion rate of 100%-600%. In addition, the water-stop ring 2 does not contain harmful substances, and the protective membrane 22 covering the swelling material 21 will not release any chemicals into the groundwater, ensuring that the water-stop ring 2 will not cause any pollution to the groundwater.

[0034] like Figure 2-4 As shown, this utility model also provides a groundwater monitoring system, including at least one pressure measuring unit 3. Multiple pressure measuring units 3 are connected in series via an equal number of pressure measuring pipes 1. Each pressure measuring unit 3 has a side inlet a. The inlet end of the pressure measuring pipe 1 is uniquely connected to the side inlet a on the pressure measuring unit 3. Each pressure measuring unit 3 is fitted with a water-stop ring 2, positioned above and below the side inlet a, thus forming an isolation area at the side inlet a. Water in this area enters one of its pressure measuring pipes through the side inlet a and is discharged from the top to obtain a water sample from this area. The water layers monitored by the side inlets of other pressure measuring units 3 are also discharged through corresponding pressure measuring pipes 1, thereby obtaining water samples from different groundwater depths for research.

[0035] like Figure 2 and Figure 3As shown, each pressure measuring unit 3 includes a sleeve 31 and a water pipe connector 32 arranged vertically. The sleeve 31 and the water pipe connector 32 are connected through a pressure measuring tube 1. An anti-expansion ring 33 is fitted onto the sleeve 31 at intervals. A water-stop ring 2 is fitted onto the sleeve 31 between two anti-expansion rings 33. When the water-stop ring expands, the two anti-expansion rings 33 can restrict the axial movement of the water-stop ring 2. Each water pipe connector 32 has a side inlet a on its outer surface, which is connected to one of its pressure measuring tubes 1. More preferably, the sleeve 31 has multiple through holes b for the pressure measuring tubes 1 to pass through. The diameter of the through holes b is adapted to the outer diameter of the pressure measuring tube. In use, each pressure measuring tube 1 is inserted into the corresponding through hole b. Multiple pressure measuring units 3 are connected in series through pressure measuring tubes 1 and placed in the groundwater area to be monitored. Each water pipe connector 32 is located at a corresponding underground monitoring point.

[0036] This utility model system includes several pressure measuring units 3 connected in series. Each pressure measuring unit 3 has a sleeve 31 with the same number of through holes b as the pressure measuring unit 3. For example, when there are three pressure measuring units 3 connected in series, there are three pressure measuring tubes. Preferably, three through holes b are provided in each sleeve for the three pressure measuring tubes 1 to pass through. Figure 4 The diagram shows a 5-layer monitoring system with 5 pressure-measuring units 3 connected in series. The entire system uses 5 pressure-measuring pipes to monitor 5 different underground water layers. One pipe is the longest, connecting 5 pressure-measuring units in series from top to bottom. This pipe is connected to the side inlet a on the lowest pressure-measuring unit 3. Another pipe connects 4 pressure-measuring units in series from top to bottom, connecting to the side inlet of the water pipe joint in the second-to-last pressure-measuring unit. The other pipes connect 3, 2, and the topmost pressure-measuring unit in series from top to bottom, respectively, each connected to the side inlet of its corresponding water pipe joint. Before inserting the water pipes or the multi-layer monitoring system into the borehole, a water-stop ring is fitted at the designated depth. The overall structure is simple and easy to implement.

[0037] like Figure 4 As shown, the monitoring system formed by the series connection has a top cover 4 and a conical bottom cover 5. A water-stop ring 2 can also be installed on the bottom cover 5, so that the side inlet a of the lowest pressure measuring unit 3 is sealed on both sides. The water-stop ring in this invention is placed in a relatively waterproof layer, or in a layer where groundwater is to be avoided due to water quality or other reasons, effectively limiting the expansion of the expansion material in the vertical direction.

[0038] Because the expanding material inside the waterstop ring of this invention only begins to expand gradually after two hours of contact with water, sufficient time is given for the installation of the well casing or multi-layer monitoring system. After expansion, the expanding material allows the waterstop ring to achieve a final expansion rate of 100%-600%, filling all the space between the well casing and the borehole, achieving a perfect water-stopping effect. The protective membrane of this waterstop ring, being a semi-permeable membrane layer, allows water to seep into the waterstop ring, causing the expanding material and the protective membrane to expand together, but without releasing any chemical substances from the waterstop ring, ensuring that the waterstop ring will not cause any pollution to groundwater.

[0039] Compared with the traditional method of backfilling with clay balls for water sealing, this invention is more convenient, precise, and reliable. Compared with the traditional method of relying on inflation and expansion to use strong air pressure to make the Parker rubber ring tightly adhere to the hole wall for water sealing, this invention is simple to operate and has a lower cost.

[0040] Any aspects not described herein are applicable to the prior art.

[0041] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. A groundwater monitoring system, characterized in that, The system includes at least one pressure measuring unit (3), and multiple pressure measuring units (3) are connected in series with an equal number of pressure measuring tubes (1). Each pressure measuring unit (3) is provided with a side inlet (a). The inlet end of the pressure measuring tube (1) is uniquely connected to the side inlet (a) on the pressure measuring unit (3). Each pressure measuring unit (3) is fitted with a water stop ring (2), which is located above and below the side inlet of the pressure measuring unit (3). The water-stop ring (2) is fitted onto the water pipe connector (32). The water-stop ring (2) includes a water-swellable material (21) and a protective membrane (22). The protective membrane (22) is applied to the outside of the swelling material (21) and is a semi-permeable membrane layer.

2. The groundwater monitoring system according to claim 1, characterized in that: When the expandable material (21) comes into contact with water, its volume expands to 2-6 times its original volume.

3. The groundwater monitoring system according to claim 1, characterized in that: The expanding material is rubber.

4. The groundwater monitoring system according to claim 1, characterized in that, The pressure measuring unit (3) includes a sleeve (31) and a water pipe connector (32) arranged vertically. The sleeve (31) and the water pipe connector (32) are connected through the pressure measuring tube (1). The sleeve (31) is fitted with anti-expansion rings (33) arranged at intervals. The water-stop ring (2) is fitted on the sleeve (31) between the two anti-expansion rings (33). The water pipe connector (32) has a side water inlet (a) on its outer side, and the side water inlet (a) is connected to one of the pressure measuring tubes (1).

5. The groundwater monitoring system according to claim 4, characterized in that, The sleeve (31) is provided with a plurality of through holes (b) through which the pressure measuring tube (1) passes, and the diameter of the through holes (b) is adapted to the outer diameter of the pressure measuring tube.

6. The groundwater monitoring system according to claim 5, characterized in that, Multiple pressure measuring units (3) are connected in series through the pressure measuring pipe (1) and placed in the underground area to be monitored, with each water pipe joint (32) located at the corresponding underground monitoring point.

7. The groundwater monitoring system according to claim 6, characterized in that, Each pressure measuring unit (3) has a sleeve (31) with the same number of through holes (b) as the pressure measuring unit (3).

8. The groundwater monitoring system according to any one of claims 1-7, characterized in that, The monitoring system formed by connecting multiple pressure measuring units (3) in series through the pressure measuring tube (1) is also provided with a top cover (4) and a conical bottom cover (5) at the bottom of the monitoring system.

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