Construction device for karst underground water dynamic monitoring hole

Abstract

The utility model provides a construction device for a karst underground water dynamic monitoring hole. The construction device for the karst underground water dynamic monitoring hole comprises a PVC pipe, the PVC pipe is fixedly sleeved with an upper water swelling rubber ring and a lower water swelling rubber ring, and the PVC pipe is provided with a filtering mechanism and a water pumping mechanism; the filtering mechanism comprises a fixing ring, a mounting ring, a non-woven fabric sleeve and two fixing assemblies, the PVC pipe is fixedly sleeved with the fixing ring, the PVC pipe is slidably sleeved with the mounting ring, and the non-woven fabric sleeve is fixedly mounted at the bottom of the mounting ring. The construction device for the karst underground water dynamic monitoring hole can carry out accurate layered water stopping in karst stratum underground water monitoring, and has the advantages that a long-term observation channel is stable, the service life is long, and silt can be isolated.

Description

Technical Field

[0001] This utility model belongs to the field of karst groundwater monitoring technology, and in particular relates to a construction device for dynamic monitoring wells of karst groundwater. Background Technology

[0002] Karst landforms are formed by the long-term dissolution of soluble rocks by surface water and groundwater. By exploring karst groundwater resources, groundwater resources can be rationally developed, utilized, and protected.

[0003] Among related technologies, an energy-saving online monitoring device for karst groundwater levels is disclosed, comprising a surface layer and a monitoring well. The monitoring well is located at the end face of the surface layer, and a well sleeve is fixedly connected to the well wall. Multiple sets of convection holes are opened on the side wall of the well sleeve, and a flow pipe is provided between each pair of convection holes in the same set. It only requires excavation of a single well and does not require filling material, thus enabling separate monitoring of the aquifer and the stable layer. The construction difficulty is low, improving the targeting and accuracy of karst groundwater monitoring. Based on the water flow pressure of the aquifer, it automatically controls the online monitoring of the water level of the stable layer, exhibiting good energy-saving effects. At the same time, when the water flow pressure of the aquifer is high, temporary flow slowing treatment can be carried out, which to a certain extent reduces the possibility of collapse in the karst area at the monitoring site, and facilitates the subsequent full development and utilization of karst groundwater, as well as water quality sampling and other work.

[0004] However, the above structure still has shortcomings. When the device is in use, the pipe is directly lowered after drilling. After long-term use, the hole wall is prone to collapse, which will squeeze the pipe and reduce its service life.

[0005] Therefore, it is necessary to provide a new construction device for dynamic monitoring wells of karst groundwater to solve the above-mentioned technical problems. Utility Model Content

[0006] The technical problem solved by this utility model is to provide a construction device for dynamic monitoring wells of karst groundwater that can accurately stop water flow in strata groundwater monitoring, has a stable long-term observation channel, a long service life, and can isolate sediment.

[0007] To solve the above-mentioned technical problems, the construction device for dynamic monitoring wells of karst groundwater provided by this utility model includes: a PVC pipe, on which an upper water-swellable rubber ring and a lower water-swellable rubber ring are fixedly sleeved, and a filtration mechanism and a pumping mechanism are provided on the PVC pipe;

[0008] The filtration mechanism includes a fixing ring, an mounting ring, a non-woven fabric sleeve, and two fixing components. The fixing ring is fixedly sleeved on the PVC pipe, and the mounting ring is slidably sleeved on the PVC pipe. The non-woven fabric sleeve is fixedly installed at the bottom of the mounting ring. The fixing components include an "L"-shaped groove, a rectangular insert, a rectangular plate, a triangular insert, an "L"-shaped pull rod, and a telescopic spring. The "L"-shaped groove is formed at the bottom of the fixing ring, and the rectangular insert is fixedly installed at the top of the mounting ring, with the top of the rectangular insert extending into the "L"-shaped groove. The rectangular plate slides within the "L"-shaped groove, and the triangular insert is fixedly installed on one side of the rectangular plate. The "L"-shaped pull rod is fixedly installed on one side of the rectangular plate, with one end of the "L"-shaped pull rod extending outside the fixing ring. The telescopic spring is sleeved on the "L"-shaped pull rod.

[0009] As a further embodiment of this utility model, the pumping mechanism includes a top ring plate, a mounting plate, a pumping pipe, a water pump, and a connecting pipe. The top ring plate is sleeved on the PVC pipe, the mounting plate is fixedly installed inside the PVC pipe, the pumping pipe is fixedly installed on the mounting plate, the water pump is fixedly installed on the top of the top ring plate, and the connecting pipe is fixedly installed at the water inlet end of the water pump. One end of the connecting pipe is connected to the pumping pipe through a connector.

[0010] As a further embodiment of this utility model, the PVC pipe is provided with multiple water inlet holes, the diameter of which is 7mm and the spacing between them is 3cm.

[0011] As a further embodiment of this utility model, the diameter of the PVC pipe is 70mm, and the expansion rate of the upper and lower water-swellable rubber rings is ≥200%.

[0012] As a further embodiment of this utility model, a triangular slot is provided on the rectangular insert, and one side of the triangular insert is located in the triangular slot and is adapted to the triangular slot.

[0013] Compared with related technologies, the construction device for dynamic monitoring wells of karst groundwater provided by this utility model has the following beneficial effects:

[0014] 1. This utility model, by setting up a filtration mechanism, enables the filtration of groundwater entering the PVC pipe and the isolation of silt and sand.

[0015] 2. This utility model, by setting up a water pumping mechanism, can pump water out of the PVC pipe, causing the water in the PVC pipe to fluctuate, allowing groundwater in the karst cave to flow into the PVC pipe. After the water level returns to calm, the water level height can be monitored. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 A first structural schematic diagram of the construction device for dynamic monitoring wells of karst groundwater provided by this utility model;

[0018] Figure 2 This is a second structural schematic diagram of the construction device for a dynamic monitoring well of karst groundwater provided by this utility model;

[0019] Figure 3 This is a partial cross-sectional structural schematic diagram of the construction device for dynamic monitoring wells of karst groundwater provided by this utility model;

[0020] Figure 4 for Figure 3 A magnified structural diagram of part A in the middle.

[0021] In the diagram: 1. PVC pipe; 2. Upper water-swellable rubber ring; 3. Lower water-swellable rubber ring; 4. Fixing ring; 5. Mounting ring; 6. Non-woven fabric sleeve; 7. "L" shaped groove; 8. Rectangular insert; 9. Rectangular plate; 10. Triangular insert; 11. "L" shaped tie rod; 12. Telescopic spring; 13. Top ring plate; 14. Mounting plate; 15. Water suction pipe; 16. Water pump; 17. Connecting pipe; 18. Water inlet. Detailed Implementation

[0022] Please refer to the following: Figure 1 , Figure 2 , Figure 3 and Figure 4 ,in, Figure 1 A first structural schematic diagram of the construction device for dynamic monitoring wells of karst groundwater provided by this utility model; Figure 2 This is a second structural schematic diagram of the construction device for a dynamic monitoring well of karst groundwater provided by this utility model; Figure 3 This is a partial cross-sectional structural schematic diagram of the construction device for dynamic monitoring wells of karst groundwater provided by this utility model; Figure 4 for Figure 3 An enlarged structural diagram of section A. The construction device for the dynamic monitoring well of karst groundwater includes: a PVC pipe 1, on which an upper water-swellable rubber ring 2 and a lower water-swellable rubber ring 3 are fixedly sleeved; and a filtration mechanism and a pumping mechanism are provided on the PVC pipe 1.

[0023] The filtration mechanism includes a fixing ring 4, an mounting ring 5, a non-woven fabric sleeve 6, and two fixing components. The fixing ring 4 is fixedly sleeved on the PVC pipe 1, and the mounting ring 5 is slidably sleeved on the PVC pipe 1. The non-woven fabric sleeve 6 is fixedly installed at the bottom of the mounting ring 5. The fixing components include an "L"-shaped groove 7, a rectangular insert 8, a rectangular plate 9, a triangular insert 10, an "L"-shaped pull rod 11, and a telescopic spring 12. The "L"-shaped groove 7 is located at the bottom of the fixing ring 4. The rectangular insert 8 is fixedly installed at the top of the mounting ring 5, with the top of the rectangular insert 8 extending into the "L"-shaped groove 7. The rectangular plate 9 slides within the "L"-shaped groove 7. The triangular insert 10 is fixedly installed on one side of the rectangular plate 9. The "L"-shaped pull rod 11 is fixedly installed on one side of the rectangular plate 9, with one end of the "L"-shaped pull rod 11 extending outside the fixing ring 4. The telescopic spring 12 is sleeved on the "L"-shaped pull rod 11.

[0024] like Figure 1 and Figure 2 As shown, the pumping mechanism includes a top ring plate 13, a mounting plate 14, a pumping pipe 15, a water pump 16, and a connecting pipe 17. The top ring plate 13 is sleeved on the PVC pipe 1. The mounting plate 14 is fixedly installed inside the PVC pipe 1. The pumping pipe 15 is fixedly installed on the mounting plate 14. The water pump 16 is fixedly installed on the top of the top ring plate 13. The connecting pipe 17 is fixedly installed at the water inlet end of the water pump 16. One end of the connecting pipe 17 is connected to the pumping pipe 15 through a connector.

[0025] like Figure 2 As shown, the PVC pipe 1 has multiple water inlet holes 18, the diameter of the water inlet holes 18 is 7mm and the spacing is 3cm.

[0026] like Figure 1 As shown, the diameter of the PVC pipe 1 is 70mm, and the expansion rate of the upper water-swellable rubber ring 2 and the lower water-swellable rubber ring 3 is ≥200%.

[0027] like Figure 1 As shown, a triangular slot is provided on the rectangular insert 8, and one side of the triangular insert 10 is located in the triangular slot and is adapted to the triangular slot.

[0028] The working principle of the construction device for dynamic monitoring wells of karst groundwater provided by this utility model is as follows:

[0029] First step: Drill a hole with a diameter of 130mm using a geological drilling rig. Drill the hole to the bottom of the cave. Place the installation ring 5 and non-woven fabric sleeve 6 on the PVC pipe 1, so that the rectangular plug 8 is inserted into the "L" shaped groove 7. After the rectangular plug 8 contacts the inclined surface of the triangular plug 10, it will push the triangular plug 10 and the rectangular plate 9 to compress the telescopic spring 12 until the triangular plug 10 is facing the triangular slot. The elastic force of the telescopic spring 12 will reset the triangular plug 10 and lock it into the triangular slot.

[0030] Step 2: Place the upper water-swellable rubber ring 2 and the lower water-swellable rubber ring 3 onto the PVC pipe 1, insert the PVC pipe 1 into the borehole, and position the upper water-swellable rubber ring 2 and the lower water-swellable rubber ring 3 50cm below the rock-soil interface and 50cm above the top of the cave, respectively. The upper water-swellable rubber ring 2 and the lower water-swellable rubber ring 3 will absorb water and expand when they come into contact with water in the borehole, and then fix the PVC pipe 1 in the borehole.

[0031] The third step: Insert the grouting pipe into the borehole from the outside of the PVC pipe 1 until it reaches the interface between the soil and rock. Inject 1:1 cement grout to fill the gap between the borehole in the soil section and the PVC pipe 1. After the cement has reached its 3-day strength, connect the connecting pipe 17 to the pumping pipe 15 and start the water pump 16 to pump out the water in the PVC pipe 1. After the water level stabilizes again, measure the initial value.

[0032] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming.

[0033] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made to these embodiments, or they can be used directly or indirectly, without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the appended claims and their equivalents, and they are similarly included within the patent protection scope of the present invention.

Claims

1. A construction device for a dynamic monitoring well of karst groundwater, characterized in that, include: A PVC pipe, wherein an upper water-swellable rubber ring and a lower water-swellable rubber ring are fixedly sleeved on the PVC pipe, and a filter mechanism and a pumping mechanism are provided on the PVC pipe; The filtration mechanism includes a fixing ring, an mounting ring, a non-woven fabric sleeve, and two fixing components. The fixing ring is fixedly sleeved on the PVC pipe, and the mounting ring is slidably sleeved on the PVC pipe. The non-woven fabric sleeve is fixedly installed at the bottom of the mounting ring. The fixing components include an "L"-shaped groove, a rectangular insert, a rectangular plate, a triangular insert, an "L"-shaped pull rod, and a telescopic spring. The "L"-shaped groove is formed at the bottom of the fixing ring, and the rectangular insert is fixedly installed at the top of the mounting ring, with the top of the rectangular insert extending into the "L"-shaped groove. The rectangular plate slides within the "L"-shaped groove, and the triangular insert is fixedly installed on one side of the rectangular plate. The "L"-shaped pull rod is fixedly installed on one side of the rectangular plate, with one end of the "L"-shaped pull rod extending outside the fixing ring. The telescopic spring is sleeved on the "L"-shaped pull rod.

2. The construction device for dynamic monitoring wells of karst groundwater according to claim 1, characterized in that: The pumping mechanism includes a top ring plate, a mounting plate, a pumping pipe, a water pump, and a connecting pipe. The top ring plate is fitted onto the PVC pipe, the mounting plate is fixedly installed inside the PVC pipe, the pumping pipe is fixedly installed on the mounting plate, the water pump is fixedly installed on the top of the top ring plate, and the connecting pipe is fixedly installed at the water inlet of the water pump. One end of the connecting pipe is connected to the pumping pipe through a connector.

3. The construction device for dynamic monitoring wells of karst groundwater according to claim 1, characterized in that: The PVC pipe has multiple water inlet holes with a diameter of 7mm and a spacing of 3cm.

4. The construction device for dynamic monitoring wells of karst groundwater according to claim 1, characterized in that: The diameter of the PVC pipe is 70mm, and the expansion rate of the upper and lower water-swellable rubber rings is ≥200%.

5. The construction device for dynamic monitoring wells of karst groundwater according to claim 1, characterized in that: The rectangular insert has a triangular slot, and one side of the triangular insert is located inside the triangular slot and is adapted to the triangular slot.

Images