Underground water monitoring well device and construction method thereof

Abstract

The invention discloses an underground water monitoring well device and a construction method thereof.The underground water monitoring well device comprises a well pipe, the well pipe comprises a plurality of pipe joints connected in sequence, every two vertically adjacent pipe joints are rotationally connected through a rotating structure, a gap is formed between every two adjacent pipe joints, and the rotating structures are in sealed connection with the pipe joints through sealing structures; wherein the rotating structure comprises a spherical hinge base and a spherical hinge rotationally connected to the spherical hinge base, the spherical hinge base is fixed to the position, close to the upper end, in the lower pipe joint, the spherical hinge base is provided with a channel penetrating through the spherical hinge base in the extending direction of the pipe joint, and the spherical hinge is provided with a through hole penetrating through the spherical hinge; the fixing sleeve is fixed to the upper end of the pipe joint located on the lower portion, a fixing groove is formed in one side of the fixing sleeve, the elastic piece is connected into the fixing groove and connected with the sealing sleeve, the inner wall of the sealing sleeve abuts against the outer wall of the spherical hinge, and the well pipe can be smoothly put into a drill hole without repeated pipe putting.

Description

Technical Field

[0001] The present invention relates to the technical field of groundwater environment monitoring devices, and particularly relates to a groundwater monitoring well device and a construction method thereof. Background Art

[0002] A groundwater monitoring well is a facility specifically used to measure and monitor the change of groundwater level. The working principle of the groundwater level monitoring well is based on the physical principle that the water pressure changes caused by the change of water level. Usually, a pipe is inserted into a borehole below the groundwater level surface. When the water level rises, it will compress the pipe, and the compression amount is proportional to the rising amount of the water level. By connecting to a water pressure sensor, the change of the groundwater level can be monitored in real time and recorded and analyzed.

[0003] For some places where the buried layer of the aquifer is relatively deep, it may be necessary to drill a borehole hundreds of meters deep. During the process of drilling the borehole, it is very difficult to ensure the verticality of the whole hole depth. If there is a problem with the hole depth verticality, it will cause difficulties in lowering the pipe during the pipe lowering process, such as the pipe getting stuck at a certain position in the hole, and even more seriously, the pipe may be damaged. Sometimes, it may be necessary to drill a new borehole and lower the pipe again, which undoubtedly brings a lot of difficulties to the construction process. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a groundwater monitoring well device and a construction method thereof, which can smoothly lower the well pipe into the borehole without repeated pipe lowering.

[0005] On the one hand, the present invention provides a groundwater monitoring well device, including a well pipe. The well pipe includes a plurality of pipe sections connected in sequence. The two adjacent pipe sections are rotatably connected through a rotating structure. There is a gap between two adjacent pipe sections. The rotating structure and the pipe section are hermetically connected through a sealing structure. Among them, the rotating structure includes: a ball hinge seat and a ball hinge rotatably connected to the ball hinge seat. The ball hinge seat is fixed at a position near the upper end inside the pipe section located below. The ball hinge seat has a channel penetrating through the ball hinge seat along the extending direction of the pipe section. The ball hinge has a through hole penetrating through it. The upper part of the ball hinge is fixedly connected to a position near the lower end inside the pipe section located above. The sealing structure includes: a fixed sleeve, an elastic member, and a sealing sleeve. The fixed sleeve is fixed at the upper end of the pipe section located below. One side of the fixed sleeve facing the central axis of the pipe section is provided with a fixed groove. An elastic member is connected in the fixed groove. The elastic member is connected to the sealing sleeve. The inner wall of the sealing sleeve abuts against the outer wall of the ball hinge.

[0006] Optionally, the inner diameter of the channel of the ball hinge seat is larger than the aperture of the through hole.

[0007] Optionally, a drainage pipe is fixed inside the pipe section. The drainage pipe is consistent with the extending direction of the pipe section. The upper end of the drainage pipe is close to the ball hinge seat. The lower end of the drainage pipe abuts against the ball hinge. The inner diameter of the drainage pipe gradually decreases from top to bottom. The inner diameter of the lower end of the drainage pipe is the same as the aperture of the through hole.

[0008] Optionally, one side of the sealing sleeve facing the central axis of the pipe section has an arc surface, the arc surface is a hemispherical surface, and the spherical surface of the hemispherical surface abuts against the spherical surface of the ball hinge.

[0009] Optionally, an embedding groove is formed along the circumferential direction of the arc surface, a sealing strip is embedded in the embedding groove, and the sealing strip abuts against the spherical surface of the ball hinge.

[0010] Optionally, all the pipe sections are connected by a towing rope. When the towing rope is straightened in each pipe section, the angle of each pipe section is fixed.

[0011] Optionally, a fixed pulley is fixed on the hole wall of each through hole. The towing rope bypasses each fixed pulley in turn, and the upper end of the towing rope extends out of the top of the uppermost pipe section.

[0012] Optionally, the fixed pulleys on two adjacent through holes are arranged on the hole walls opposite to the two through holes.

[0013] Optionally, the bottom end of the pipe section at the bottom has sawteeth along its circumferential direction. The sawteeth are arranged obliquely downward. The upper end of the sawteeth is fixed near the inner wall of the pipe section, and the lower end of the sawteeth is located near the outer wall of the pipe section.

[0014] On the other hand, the present invention provides a construction method based on the above groundwater monitoring well device, including the following steps:

[0015] Select a suitable position to drill a hole until the drilling depth reaches the aquifer where the entire target water level is located;

[0016] Select a well pipe with an appropriate number of pipe sections according to the drilling depth;

[0017] Insert the well pipe into the drill hole along the drill hole orifice. When the hole depth direction is inclined, the lower pipe section and the pipe section connected thereto will rotate through the rotating structure, so that the lowermost pipe section can smoothly pass through the drill hole and continue to lower the pipe until all the pipe sections are lowered into the hole;

[0018] Monitor the groundwater entering the well pipe, and the sealing structure prevents water from seeping out of the pipe wall.

[0019] The technical solution provided by the embodiment of the present invention has the following advantages compared with the prior art:

[0020] The groundwater monitoring well device provided by the embodiment of the present invention sets the entire well pipe as multiple pipe sections and connects adjacent two pipe sections through a rotating structure. In this way, during the process of lowering the pipe, if the direction of the hole depth changes, the ball joint in the rotating structure between the pipe section at the lower end and the adjacent pipe section will rotate at a certain angle to adapt to the change in the well depth direction until all pipe sections are lowered into the hole. During this period, the sealing sleeve tightly abuts against the outer wall of the ball joint under the elastic force of the elastic member. On the one hand, the sealing sleeve can seal the gap between the ball joint and the pipe section rotatably connected thereto to prevent groundwater from flowing out between the two. On the other hand, the elastic force of the elastic member can limit and fix the ball joint to prevent the ball joint from rotating excessively, so that the well pipe can be firmly fixed in the borehole. Subsequently, groundwater enters from the opening of the pipe section at the bottommost end and goes upward along the channel of the ball joint seat and the through hole of the ball joint, and thus the water level change can be monitored by the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of an unused state of a groundwater monitoring well device provided by an embodiment of the present invention;

[0022] Figure 2 is a schematic structural diagram of a used state of a groundwater monitoring well device provided by an embodiment of the present invention;

[0023] Figure 3 is Figure 1 a partially enlarged schematic diagram of the local structure at G in

[0024] Figure 4 is Figure 1 a sectional view taken along the line A-A in

[0025] Figure 5 is Figure 4 a partially enlarged schematic diagram of the local structure at J in

[0026] Figure 6 is Figure 3 a partially enlarged schematic diagram of the local structure at H in

[0027] Figure 7 is Figure 4 a partially enlarged schematic diagram of the local structure at K in

[0028] Figure 8 is a partially enlarged schematic diagram of the pipe section at the bottom provided by an embodiment of the present invention;

[0029] Figure 9 is a partially enlarged schematic diagram of the pipe section at the top provided by an embodiment of the present invention.

[0030] Description of the reference numerals:

[0031] 1. Pipe section; 2. Rotating structure; 20. Ball hinge seat; 21. Channel; 22. Ball hinge; 23. Through hole; 3. Sealing structure; 30. Fixed sleeve; 31. Elastic member; 32. Sealing sleeve; 33. Fixed groove; 34. Arc surface; 35. Embedded groove; 36. Sealing strip; 4. Drainage pipe; 5. Towing rope; 6. Fixed pulley; 7. Bracket; 8. Saw teeth; 9. Wire wheel. Detailed implementation manners

[0032] The following combines the accompanying drawings to describe in detail a specific implementation manner of the present invention. However, it should be understood that the protection scope of the present invention is not limited by the specific implementation manner.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the technical solutions of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0034] For some places where the buried layer of the aquifer is relatively deep, it may be necessary to drill holes hundreds of meters deep. During the drilling process, it is very difficult to ensure the verticality of the entire hole depth. If there are problems with the verticality of the hole depth, it will cause difficulties in lowering the pipe during the pipe-laying process. For example, the pipe may get stuck at a certain position in the hole, or even worse, the pipe may be damaged. Sometimes, it may be necessary to re-drill the hole and lower the pipe again, which undoubtedly brings a lot of difficulties to the construction process.

[0035] Therefore, the embodiment of the present invention provides a groundwater monitoring well device and its construction method, which can smoothly lower the well pipe into the drill hole without repeated pipe-laying.

[0036] At least one embodiment of the present invention provides a groundwater monitoring well device and a construction method thereof. Among them, a groundwater monitoring well device includes a well pipe, the well pipe includes a plurality of pipe sections connected in sequence, and two adjacent pipe sections are rotationally connected through a rotating structure. There is a gap between two adjacent pipe sections, and the rotating structure and the pipe section are hermetically connected through a sealing structure. Among them, the rotating structure includes: a spherical hinge seat and a spherical hinge rotatably connected to the spherical hinge seat. The spherical hinge seat is fixed at a position near the upper end inside the pipe section located below. The spherical hinge seat has a channel penetrating the spherical hinge seat along the extending direction of the pipe section. The spherical hinge has a through hole penetrating it. The upper part of the spherical hinge is fixedly connected to a position near the lower end inside the pipe section located above. The sealing structure includes: a fixed sleeve, an elastic member, and a sealing sleeve. The fixed sleeve is annular, the fixed sleeve is fixed at the upper end of the pipe section located below, a fixed groove is opened on one side of the fixed sleeve facing the central axis of the pipe section, an elastic member is connected in the fixed groove, the sealing sleeve is located at the hollow position of the fixed sleeve, the elastic member is connected to the sealing sleeve, and the inner wall of the sealing sleeve abuts against the outer wall of the spherical hinge.

[0037] In the groundwater monitoring well device and the construction method thereof provided by the above embodiment of the present invention, by setting the entire well pipe as a plurality of pipe sections and connecting adjacent pipe sections through a rotating structure, during the process of lowering the pipe, if the hole depth direction changes, the spherical hinge in the rotating structure between the pipe section at the lower end and the adjacent pipe section will rotate by a certain angle to adapt to the change in the well depth direction until all pipe sections are lowered into the hole.

[0038] The present invention will be described below through several specific embodiments. In order to keep the description below the embodiments of the present invention clear and concise, the detailed description of known functions and known components may be omitted. When any component of the embodiment of the present invention appears in more than one drawing, the component may be represented by the same reference numeral in each drawing.

[0039] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , Figure 1 is a schematic structural diagram of an unused state of a groundwater monitoring well device provided by an embodiment of the present invention, Figure 2 is a schematic structural diagram of a used state of a groundwater monitoring well device provided by an embodiment of the present invention, Figure 3 is Figure 1 a partial enlarged structural diagram at G in Figure 4 is Figure 1 a sectional view taken along the A-A direction in Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown in the figure, on the one hand, an embodiment of the present invention provides a groundwater monitoring well device, including a well pipe, which includes a plurality of pipe sections 1 connected in sequence. It should be understood that the length of the pipe section 1 specifically needs to be determined according to the well depth. However, from a structural analysis, the shorter the pipe section 1, the better. But the shorter the pipe section 1, the more difficult it is to manufacture and assemble, and the greater the risk of leakage between the pipe sections 1. However, if the pipe section 1 is too long, it will be difficult to lower the pipe when the hole depth direction changes. Therefore, for deep wells over 100 meters, the length of the pipe section 1 cannot exceed 10 meters. When the pipe section 1 over 10 meters encounters a change in the hole depth direction during the pipe-lowering process, the overall inclination length is too large, which easily leads to the problem of difficult pipe-lowering. The pipe section 1 can be made of common materials, such as PVC material, which can be processed into pipe sections 1 of different lengths during processing to match monitoring wells of different depths. The two adjacent pipe sections 1 up and down are rotatably connected through a rotating structure 2. It should be noted that the rotating structure 2 does not need to have a large rotation angle, but the rotation direction needs to be flexible. There is a gap between the two adjacent pipe sections 1, and the rotating structure 2 and the pipe section 1 are hermetically connected through a sealing structure 3. The sealing connection of the sealing structure 3 can ensure that the water in the pipe section 1 will not seep out or seep out too much to damage the formed well wall. Among them, the rotating structure 2 includes: a ball joint seat 20 and a ball joint 22 rotatably connected to the ball joint seat 20. The ball joint seat 20 is fixed at a position near the upper end inside the pipe section 1 located below. The ball joint seat 20 has a channel 21 penetrating the ball joint seat 20 along the extending direction of the pipe section 1. The ball joint 22 has a through hole 23 penetrating it. The upper part of the ball joint 22 is fixedly connected to a position near the lower end inside the pipe section 1 located above. It should be noted that the ball joint seat 20 is fixed at a position near the upper end inside the pipe section 1 located below, and the upper part of the ball joint 22 is fixedly connected inside the pipe section 1 located above. In this way, during the pipe-lowering process, since the pipe section 1 always in the lower position first contacts the change in the hole depth direction, therefore, designing the lower pipe section 1 to be able to rotate relatively is more conducive to smooth pipe-lowering. Groundwater can then rise along the pipe section 1 through the channel 21 and the through hole 23 to complete the water level monitoring. The sealing structure 3 includes: a fixed sleeve 30, an elastic member 31, and a sealing sleeve 32. The fixed sleeve 30 is annular. The fixed sleeve 30 is fixed to the upper end of the pipe section 1 located below. One side of the fixed sleeve 30 facing the central axis of the pipe section 1 is provided with a fixed groove 33. An elastic member 31 is connected in the fixed groove 33. The sealing sleeve 32 is located in the hollow position of the fixed sleeve 30. The elastic member 31 is connected to the sealing sleeve 32. The inner wall of the sealing sleeve 32 abuts against the outer wall of the ball joint 22. It should be understood that the materials of the elastic member 31 and the sealing sleeve 32 should both be selected as waterproof materials, and they will not cause material changes or reactions due to long-term contact with water. The elastic member 31 can be a compression spring, and stainless steel material can be selected. The sealing sleeve 32 can be a flexible material or a rigid material. If it is a flexible material, a flexible material with a small deformation range should also be selected. In this way, through the cooperation of the sealing sleeve 32 and the elastic member 31, the sealing between the pipe section 1 and the ball joint 22 can be achieved.

[0040] An underground water monitoring well device provided by an embodiment of the present invention sets the entire well pipe as a plurality of pipe sections 1, and connects adjacent two pipe sections 1 through a rotating structure 2. In this way, during the process of lowering the pipe, if the hole depth direction changes, such as Figure 2 shown, the ball joint 22 in the rotating structure 2 between the pipe section 1 at the lower end and the adjacent pipe section 1 will rotate by a certain angle to adapt to the change in the well depth direction until all pipe sections 1 are lowered into the hole. During this period, the sealing sleeve 32 tightly abuts against the outer wall of the ball joint 22 under the elastic force of the elastic member 31. On the one hand, the sealing sleeve 32 can seal the gap between the ball joint 22 and the pipe section 1 rotatably connected thereto, avoiding groundwater from flowing out between the two. On the other hand, the elastic force of the elastic member 31 can limit and fix the ball joint 22, avoiding excessive rotation of the ball joint 22, so that the well pipe can be firmly fixed in the borehole. Subsequently, groundwater enters from the opening of the lowermost pipe section 1 and travels upward along the channel 21 of the ball joint seat 20 and the through hole 23 of the ball joint 22, so that the water level change can be monitored by the sensor.

[0041] Considering that the ball joint 22 will rotate by a certain angle relative to the ball joint seat 20, in order to avoid misalignment between the channel 21 of the ball joint seat 20 and the through hole 23 of the ball joint 22 after the ball joint 22 rotates, which will hinder the rise of the water level in the well pipe.

[0042] Based on this, referring again to Figure 2 , in an underground water monitoring well device provided by an embodiment of the present invention, the diameter of the channel 21 of the ball joint seat 20 is larger than the aperture of the through hole 23. It should be understood that the inner diameter of the channel 21 should be specifically determined according to the rotation angle of the ball joint 22. Assuming that the maximum rotation angle of the ball joint 22 is 2°, when the ball joint 22 rotates by 2°, the inner wall of the channel 21 should be located outside the hole wall of the through hole 23. In this way, when groundwater enters the channel 21 from the pipe section 1 and then enters the through hole 23, it will not be blocked by a part of the solid position of the ball joint seat 20 for a part of the through hole 23, but will completely open the through hole 23 to facilitate the flow of water. Theoretically speaking, the larger the inner diameter of the channel 21 opened in the ball joint seat 20, the better. However, if the inner diameter of the channel 21 is too large, the strength of the ball joint seat 20 will be reduced too much. Therefore, it is necessary to ensure that the strength of the ball joint seat 20 is within a suitable range. The ball joint seat 20, the pipe section 1, and the ball joint 22 can all be prefabricated parts, and the three can be assembled before leaving the factory and then go to the site for construction.

[0043] Considering that if the water flow direction changes repeatedly due to the obstruction of the internal structure of the pipe section 1 during the rising process of the water level, the kinetic energy of the water flow will be reduced, the rise of the water level will be slower, and the water level will lag, affecting the real-time monitoring of the water level.

[0044] Based on the above considerations, referring to Figure 1, in the pipe section 1 of a groundwater monitoring well device provided by an embodiment of the present invention, a drainage pipe 4 is fixed. The drainage pipe 4 is consistent with the extending direction of the pipe section 1. The upper end of the drainage pipe 4 is close to the ball hinge seat 20, and the lower end of the drainage pipe 4 abuts against the ball hinge 22. The inner diameter of the drainage pipe 4 gradually decreases from top to bottom, and the inner diameter of the lower end of the drainage pipe 4 is the same as the aperture of the through hole 23. As Figure 2 In Figure 2 , the drainage pipe 4 has a conical structure with a larger upper part and a smaller lower part. It should be noted that the upper end of the drainage pipe 4 preferably does not abut against the bottom of the ball hinge seat 20. In this way, when groundwater passes through the rotating structure 2, it first enters the through hole 23 through the channel 21 and can smoothly enter the drainage pipe 4 along the through hole 23. Since the diameters of both the channel 21 and the through hole 23 are smaller than that of the pipe section 1, which has a certain closing effect, it will pressurize and accelerate the groundwater passing through it to a certain extent. The conical structure of the drainage pipe 4 enables the groundwater to gradually decompress and decelerate after entering the drainage pipe 4 and gradually be consistent with the initial speed when entering the pipe section 1. In this way, when the groundwater enters the pipe section of the pipe section 1 without the rotating structure 2 from the drainage pipe 4, the speed is relatively stable, and the accuracy rate of its monitoring data is relatively high.

[0045] Reference Figure 3 、 Figure 4 And Figure 5 , among which, Figure 5 Is Figure 4 The partial structure enlarged schematic diagram at J in Figure 4 . One side of the sealing sleeve 32 facing the central axis of the pipe section 1 has an arc surface 34, and the arc surface 34 is a hemispherical surface. The spherical surface of the hemispherical surface abuts against the spherical surface of the ball hinge 22.

[0046] Since the ball hinge 22 is spherical as a whole, in order to make the sealing sleeve 32 closely fit with the ball hinge 22, it is necessary to ensure that one side of the sealing sleeve 32 facing the central axis of the pipe section 1 has an arc surface 34, and the arc surface 34 is a hemispherical surface. The spherical surface of the hemispherical surface abuts against the spherical surface of the ball hinge 22. In this way, no matter which direction the ball hinge 22 rotates, the spherical surface of the hemispherical surface of the arc surface 34 of the sealing sleeve 32 can always abut against the spherical surface of the ball hinge 22. That is to say, slightly less than half of the ball hinge 22 is embedded in the ball hinge seat 20, so that the plane where the maximum diameter of the ball hinge 22 is located is in the same plane as the spherical surface of the hemispherical surface of the arc surface 34.

[0047] As Figure 5 Shown, there are multiple fixing grooves 33, which are evenly arranged on one side of the annular fixing sleeve 30. One elastic member 31 is connected in each fixing groove 33. The first end of the elastic member 31 is fixed at the bottom of the fixing groove 33, and the second end of the elastic member 31 is fixedly connected to the sealing sleeve 32. One end of the sealing sleeve 32 is always located in the fixing groove 33. In order to facilitate the limiting and guiding of the sealing sleeve 32, a part of the sealing sleeve 32 can be designed as a square structure. As Figure 5The left half of the middle sealing sleeve 32 is a square structure. This square structure and the groove wall of the fixed groove 33 are in sliding fit along the radial direction of the fixed sleeve 30, playing a guiding role to avoid the shaking of the elastic member 31, so that its telescopic direction is along the radial direction of the fixed sleeve 30. One end of the sealing sleeve 32 is always located in the fixed groove 33, which can limit the maximum elongation length of the elastic member 31 so that it does not exceed the groove depth of the fixed groove 33, or a simple limiting structure such as a limiting rod can be provided between the sealing sleeve 32 and the fixed groove 33. In this way, as the ball joint 22 rotates, the elastic member 31 adaptively contracts or elongates, and the sealing sleeve 32 will have a slight translation, so as to ensure that the arc surface 34 of the sealing sleeve 32 abuts against the spherical surface of the ball joint 22 to achieve sealing.

[0048] Reference Figure 6 , Figure 6 is Figure 3 a schematic enlarged view of the local structure at H in Figure 6 shown. In a groundwater monitoring well device provided by an embodiment of the present invention, an embedding groove 35 is provided along the circumferential direction of the arc surface 34, and a sealing strip 36 is embedded in the embedding groove 35, and the sealing strip 36 abuts against the spherical surface of the ball joint 22.

[0049] It should be understood that the overall size of the sealing sleeve 32 is relatively large. If all are made of flexible materials, it is easy to cause large changes in the deformation amount after a long time of use. Therefore, in the embodiment of the present invention, the sealing sleeve 32 is designed to be made of rigid materials such as plastic materials and stainless steel materials. An embedding groove 35 is provided along the circumferential direction of the arc surface 34, and a sealing strip 36 is embedded in the embedding groove 35. The sealing strip 36 can be selected from common materials of the sealing strip 36, such as silicone sealing strips, TPV (thermoplastic vulcanizate) sealing strips, NR (natural rubber) sealing strips, etc. In this way, through the cooperation of the rigid sealing sleeve 32 and the small-size flexible sealing strip 36, on the one hand, the rigidity of the sealing structure 3 can be ensured to avoid aging and failure after long-term use. On the other hand, the local part in contact with the spherical surface of the ball joint 22 has flexibility, which can ensure the sealing between the sealing strip 36 and the ball joint 22.

[0050] When the well depth of the monitoring well is relatively deep, the number of pipe sections 1 is large, and the number of rotating structures 2 increases accordingly, so the number of angle change positions of the overall well pipe is large. To avoid the overall structure of the well pipe from being loose, referring again to Figure 1 and Figure 2 , all pipe sections 1 are connected by a traction rope 5. When the traction rope 5 is straightened in each pipe section 1, the angle of each pipe section 1 is fixed. In this way, by tightening the traction rope 5 at the upper end of the well pipe, all pipe sections 1 can be tightly connected into one body, and it is ensured that its shape will not change anymore, thereby ensuring the stability of the internal groundwater level and making the later monitoring accuracy higher. The traction rope 5 is made of a material with better toughness, such as common steel wire ropes. To ensure the traction stability of the traction rope 5, a wire wheel 9 can be connected to the end of the traction rope 5, asFigure 9 As shown Figure 9 Figure 9 is a partial structural schematic diagram of the pipe section at the top provided by the embodiment of the present invention. The towing rope 5 is wound around the wire reel 9. The wire reel 9 can be selected as the wire reel for winding the kite string. Generally, such a wire reel 9 has a locking structure. After the towing rope 5 is wound around the wire reel 9, the wire reel 9 can be locked through the locking structure so that its length will no longer change. Subsequently, the wire reel 9 is placed on the ground and fixed.

[0051] Refer to Figure 7 , Figure 7 is Figure 4 a partially enlarged structural schematic diagram of the K position in Figure 7 As shown, a fixed pulley 6 is fixed on the hole wall of each through hole 23. The fixed pulley 6 is fixed on the hole wall of the through hole 23 through a bracket 7. The towing rope 5 sequentially bypasses each fixed pulley 6. The upper end of the towing rope 5 extends out of the top of the topmost pipe section 1. By fixing the fixed pulley 6 on the hole wall of the through hole 23, when the towing rope 5 is pulled outside the well pipe, the direction of the towing rope 5 can be changed through the fixed pulley 6 to adapt to the direction change of each pipe section 1. At the same time, the fixed pulley 6 can prevent the towing rope 5 from contacting the edges and corners of the ball hinge 22 and the ball hinge seat 20, thereby avoiding the towing rope 5 from being cut due to repeated friction.

[0052] As Figure 2 shown, the fixed pulleys 6 on two adjacent through holes 23 are arranged on the opposite hole walls of the two through holes 23. In this way, the towing rope 5 can apply force alternately on the inner walls of different pipe sections 1. On the one hand, this method can avoid the problem of uneven force on the well pipe caused by applying force to one side of the well pipe. On the other hand, since there may be multiple directions for the change of the hole depth angle of the drill hole, the towing rope 5 can apply force alternately on the inner walls of different pipe sections 1, which can better fix the shapes of multiple pipe sections 1 and make them consistent with the well depth direction.

[0053] Considering that when the well depth angle changes during the pipe lowering process, the bottom of the pipe section 1 at the bottom will inevitably directly collide with the hole wall of the drill hole. Based on this, refer to Figure 8 , Figure 8 Figure 2 is a partial structural schematic diagram of the pipe section at the bottom provided by the embodiment of the present invention. As Figure 8 shown, the bottom end of the pipe section 1 at the bottom has sawteeth 8 along its circumference. The sawteeth 8 are inclined downward. The upper end of the sawteeth 8 is fixed near the inner wall of the pipe section 1, and the lower end of the sawteeth 8 is located near the outer wall of the pipe section 1. The sawteeth 8 can cut the hole wall at the angle change during the pipe lowering process of the pipe section 1, making the pipe lowering smoother and avoiding repeated pipe lowering. In addition, the sawteeth 8 are inclined downward, the upper end of the sawteeth 8 is fixed near the inner wall of the pipe section 1, and the lower end of the sawteeth 8 is located near the outer wall of the pipe section 1, which can make the cut soil spread to the outside of the pipe section 1 and avoid soil entering the pipe section 1.

[0054] As an implementable mode of a groundwater monitoring well device provided by an embodiment of the present invention, a position sensor and an angle sensor can be provided on the pipe section 1 at the bottom, so that the position and the change angle of the angle change of the borehole can be grasped in real time during the pipe lowering, and thus the direction of the pipe section 1 can be changed in advance through the towing rope 5 to further prevent the pipe from getting stuck at a certain position in the hole.

[0055] Another aspect of the embodiment of the present invention provides a construction method based on the above groundwater monitoring well device, including the following steps:

[0056] Select a suitable position for drilling, and the drilling depth reaches the aquifer where the entire target water level is located;

[0057] Select a well pipe with an appropriate number of pipe sections 1 according to the drilling depth;

[0058] Insert the well pipe into the borehole along the borehole orifice. When the hole depth direction is inclined, the pipe section 1 at the lower end and the pipe section 1 connected thereto will rotate through the rotating structure 2, so that the lowermost pipe section 1 can smoothly pass through the borehole and continue to lower the pipe until all the pipe sections 1 are lowered into the hole;

[0059] Monitor the groundwater entering the well pipe, and the sealing structure 3 prevents water from seeping out from the pipe wall.

[0060] The above are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any changes that can be thought of by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A groundwater monitoring well device, characterized in that: The well pipe comprises a plurality of pipe sections (1) connected in sequence, two pipe sections (1) adjacent to each other are rotatably connected via a rotating structure (2), a gap is provided between the two adjacent pipe sections (1), and the rotating structure (2) and the pipe section (1) are sealed via a sealing structure (3); wherein: The rotating structure (2) comprises: a ball joint seat (20) and a ball joint (22) rotatably connected to the ball joint seat (20); the ball joint seat (20) is fixed to a position near the upper end of the pipe section (1) located below; the ball joint seat (20) has a passage (21) penetrating the ball joint seat (20) along the extension direction of the pipe section (1); the ball joint (22) has a through hole (23) penetrating the ball joint seat (20); and the upper part of the ball joint (22) is fixedly connected to a position near the lower end of the pipe section (1) located above. The sealing structure (3) comprises: a fixing sleeve (30), an elastic member (31) and a sealing sleeve (32); the fixing sleeve (30) is fixed to the upper end of the pipe section (1) located below; the fixing sleeve (30) is provided with a fixing groove (33) on one side facing the central axis of the pipe section (1); the fixing groove (33) is connected with the elastic member (31); the elastic member (31) is connected to the sealing sleeve (32); the inner wall of the sealing sleeve (32) abuts against the outer wall of the ball joint (22).

2. The groundwater monitoring well device according to claim 1, characterized in that: The inner diameter of the passage (21) of the ball joint seat (20) is greater than the aperture of the through hole (23).

3. The groundwater monitoring well device according to claim 1, characterized in that: A drainage tube (4) is fixed inside the pipe joint (1), and the drainage tube (4) extends in the same direction as the pipe joint (1). The upper end of the drainage tube (4) is close to the ball joint seat (20), and the lower end of the drainage tube (4) abuts against the ball joint (22). The inner diameter of the drainage tube (4) gradually decreases from top to bottom, and the inner diameter of the lower end of the drainage tube (4) is consistent with the aperture of the through hole (23).

4. The groundwater monitoring well device according to claim 1, characterized in that: The sealing sleeve (32) has an arcuate surface (34) on one side facing the central axis of the pipe joint (1); the arcuate surface (34) is a hemispherical surface, and the spherical surface of the hemispherical surface abuts against the spherical surface of the ball joint (22).

5. The groundwater monitoring well device according to claim 4, characterized in that: The arc surface (34) is provided with an embedding groove (35) along its circumference, a sealing strip (36) is embedded in the embedding groove (35), and the sealing strip (36) abuts against the spherical surface of the ball joint (22).

6. The groundwater monitoring well device according to claim 1, characterized in that: All the pipe sections (1) are connected by a traction rope (5). When the traction rope (5) is stretched straight inside each pipe section (1), the angle of each pipe section (1) is fixed.

7. The groundwater monitoring well device according to claim 6, characterized in that: A fixed pulley (6) is fixed on the wall of each through hole (23), and the traction rope (5) passes around each fixed pulley (6) in turn, with the upper end of the traction rope (5) extending out of the top of the uppermost pipe section (1).

8. The groundwater monitoring well device according to claim 7, characterized in that: The fixed pulleys (6) on two adjacent through holes (23) are arranged on the opposite hole walls of the two through holes (23).

9. The groundwater monitoring well device according to claim 1, characterized in that: The bottom end of the pipe section (1) located at the bottom has serrations (8) along its circumference, and the serrations (8) are arranged obliquely downward, the upper end of the serrations (8) is fixed to the pipe section (1) near the inner wall, and the lower end of the serrations (8) is located at the pipe section (1) near the outer wall.

10. A method for constructing a groundwater monitoring well device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Select a suitable location to drill a hole, and the drilling depth should reach the aquifer where the target water level is located; Selecting a well pipe with an appropriate number of pipe sections (1) according to the drilling depth; The well pipe is inserted into the borehole along the borehole opening. When the depth direction of the hole is inclined, the lower pipe section (1) and the pipe sections (1) connected thereto are rotated through the rotating structure (2), so that the lowermost pipe section (1) can smoothly pass through the borehole and continue to be lowered until all the pipe sections (1) are lowered into the hole; The groundwater entering the well pipe is monitored, and the sealing structure (3) prevents water from seeping out of the pipe wall.

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