A well washing and dredging equipment for groundwater monitoring wells

Abstract

The present application relates to the technical field of underground well cleaning construction, and provides a well washing and dredging device for underground water monitoring wells, which comprises an insertion pipe, a plurality of first fan-shaped swing members, the first fan-shaped swing members being circumferentially and spacedly arranged on the insertion pipe, a first arc-shaped guide groove being formed in each of the first fan-shaped swing members, and the first arc-shaped guide grooves of the first fan-shaped swing members collectively forming an annular guide groove, a flushing member being slidably arranged in the annular guide groove, and a cleaning wheel being rotatably arranged on the flushing member, the flushing member being configured to drive the cleaning wheel to roll against the inner wall of the well after being rotated, so as to clean the inner wall of the well. Through the above technical solution, the technical problem that it is difficult and dangerous to clean the lateral well wall of the underground well manually in the prior art is solved, and compared with the traditional dredging device which cannot be flexibly adapted to the concave-convex condition of the well wall, the present device can more comprehensively clean the well wall, thereby improving the dredging coverage.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of underground well cleaning construction technology, specifically, to a well washing and dredging device for groundwater monitoring wells. Background Technology

[0002] In groundwater monitoring, silt accumulation is a common problem in underground wells after long-term use. Silt not only settles at the bottom of the well but also adheres to the well walls, severely affecting the accuracy of water level and quality monitoring. Specifically, silt adhering to the well walls can cause deviations in water level gauge readings, interfere with the representativeness of water samples, and lead to inaccurate water quality monitoring data. Simultaneously, silt accumulation may block sensors and water flow channels, resulting in inaccurate flow rate monitoring and even increasing the risk of well wall collapse, threatening the long-term safe use of the well. Therefore, regularly cleaning silt from inside the well is of great significance for ensuring the accuracy of underground well monitoring and its long-term effective operation. Currently, while manual sludge removal allows for precise operation, it is costly and carries significant safety risks, especially in complex underground well environments where workers are susceptible to suffocation and falls. Traditional cleaning equipment relies heavily on high-pressure water jets to remove sludge; while effective at removing sediment, the high recoil force places high demands on the equipment, easily causing wear and tear and reducing its durability and reliability. Given the shortcomings of existing cleaning methods, there is an urgent need to develop a highly efficient, safe, and durable well-cleaning and sludge-removing device for groundwater monitoring wells. Summary of the Invention

[0003] To overcome the above-mentioned defects, the present invention provides a groundwater monitoring well cleaning and dredging device, which solves the technical problem that manual cleaning of the lateral well wall of underground wells is difficult and dangerous in the prior art.

[0004] According to one aspect, at least one embodiment of the present invention provides a well-washing and dredging device for groundwater monitoring wells, comprising: Insert tube; The first sector-shaped oscillating component, there are several of the first sector-shaped oscillating components, the several of the first sector-shaped oscillating components are arranged circumferentially at intervals on the insertion tube, the first sector-shaped oscillating component is provided with a first arc-shaped guide groove, and the first arc-shaped guide grooves on the several of the first sector-shaped oscillating components together form an annular guide groove. A flushing component is slidably disposed within the annular guide groove, and a cleaning wheel is rotatably mounted on the flushing component. The flushing component is configured such that, upon rotation, it drives the cleaning wheel to roll and abut against the inner wall of the well, thereby cleaning the inner wall of the well.

[0005] For example, at least one embodiment of this disclosure provides a groundwater monitoring well cleaning and dredging device, wherein the first fan-shaped swing member is hinged to the insertion tube, the hinge axis is along the tangential direction of the insertion tube wall, and the first fan-shaped swing member is configured to swing so that the interval between adjacent first fan-shaped swing members expands or shrinks, thereby increasing or decreasing the radius of the annular guide groove.

[0006] For example, a groundwater monitoring well cleaning and dredging device provided in at least one embodiment of this disclosure further includes: A first sleeve is rotatably mounted on the wall of the insertion tube, and the flushing component is connected to the first sleeve via a first connecting rod. A silt-receiving bucket is disposed on the first sleeve, and the first connecting rod is connected to the silt-receiving bucket. The silt-receiving bucket is located below the flushing member. The flushing member is configured to drive the silt-receiving bucket to rotate synchronously through the first connecting rod after being placed in the annular guide groove. A retaining edge is provided on one side of the silt-receiving bucket, and the retaining edge is used to slide against the inner wall of the well.

[0007] For example, at least one embodiment of this disclosure provides a well-washing and dredging device for groundwater monitoring wells. A liquid flow pipe is inserted inside the flushing component, and the outlet end of the liquid flow pipe and the cleaning wheel are located on opposite sides of the flushing component. The flushing component is configured such that after liquid exits from the outlet end, the force of the liquid flow drives the flushing component to slide along the annular guide groove. The device further includes: A rotary joint is rotatably mounted on the wall of the insertion tube. The rotary joint is located above the first sleeve. The rotary joint is provided with a liquid inlet pipe. One end of the liquid inlet pipe is connected to the liquid flow pipe, and the other end is used to connect to an external liquid inlet source.

[0008] For example, at least one embodiment of this disclosure provides a groundwater monitoring well cleaning and dredging device, wherein the top surface of the flushing component is provided with a sliding insertion part, the sliding insertion part is used to extend into the annular guide groove and slide under the guidance of the annular guide groove; the bottom of the flushing component is provided with an installation groove, and one end of the first connecting rod is inserted into the installation groove.

[0009] For example, at least one embodiment of this disclosure provides a groundwater monitoring well cleaning and dredging device, wherein each of the first fan-shaped swing members has a strip-shaped guide groove along the radial direction on both straight edges, and further includes: The third sleeve is slidably mounted on the insertion tube. Several second connecting rods are hinged to the third sleeve. The other end of each second connecting rod is provided with a second fan-shaped swing member. One end of each second fan-shaped swing member is provided with a sliding part, which slides within the strip-shaped guide groove. The second fan-shaped swing member is located between two adjacent first fan-shaped swing members. The second fan-shaped swing member has a second arc-shaped guide groove, which is used to cooperate with the first arc-shaped guide groove to increase the length of the annular guide groove. The second connecting rod is configured such that after one end is driven upward by the third sleeve, the second connecting rod drives the second fan-shaped swing member and then drives the first fan-shaped swing member to retract synchronously, thereby reducing the distance between the first and second fan-shaped swing members and thus reducing the length of the annular guide groove.

[0010] For example, at least one embodiment of this disclosure provides a groundwater monitoring well cleaning and dredging device, in which a linear drive is provided on the wall of the insertion tube, the linear drive being located below the third sleeve, and the feed end acting on the third sleeve to push the third sleeve upward.

[0011] For example, a groundwater monitoring well cleaning and dredging device provided in at least one embodiment of this disclosure further includes: A support frame has support rods extending from both ends. The support frame is used to be erected at the wellhead via the support rods. The support frame is equipped with a rotation drive and a lead screw driven by the rotation drive. The insertion tube is equipped with a nut block that cooperates with the lead screw. The rotation drive is configured to drive the lead screw to rotate and then drive the insertion tube to move up and down via the nut block.

[0012] For example, a groundwater monitoring well cleaning and dredging device provided in at least one embodiment of this disclosure further includes: The filter box is divided into a sludge retention chamber and a liquid flow chamber by a filter screen. A negative pressure pump is installed in the sludge retention chamber and is connected to the sludge receiving hopper. The negative pressure pump is used to draw the sludge in the sludge receiving hopper into the sludge retention chamber and to allow the liquid filtered by the filter screen to flow into the liquid flow chamber.

[0013] For example, at least one embodiment of this disclosure provides a well-washing and sludge-removing device for groundwater monitoring wells, wherein an inlet pump is provided on one side of the liquid flow chamber, and the two ends of the inlet pump are respectively connected to the liquid flow chamber and the inlet pipe, for pumping the residual liquid from the sludge retention chamber separated by the filter screen to the outlet end of the flushing component. The beneficial effects of the embodiments of the present invention are as follows: In this invention, the device further enhances its performance through the coordinated operation of the insertion tube, the first sector-shaped swinging component, the flushing component, and the adjustment mechanism. The adjustment mechanism at the opening of the annular guide groove allows for flexible adjustment of the guide rail radius according to the inner diameter of different monitoring wells. Compared to traditional fixed-size dredging equipment, which struggles to adapt to various well diameters, this device can meet the dredging needs of monitoring wells of different specifications, expanding its application range. While ensuring a tight fit between the annular guide groove and the well wall, it avoids damage to the well wall due to excessive compression. The non-closed opening design of the annular guide groove not only facilitates the installation and disassembly of the flushing component but also provides space for the swinging of the first sector-shaped swinging component when adjusting the guide rail radius, making the radius adjustment process smoother. The insertion tube serves as the overall support, and together with the circumferentially spaced and swingable first sector-shaped swinging components, the annular guide groove can adapt to different well wall conditions. Compared to traditional dredging equipment, which cannot flexibly adapt to uneven well walls, this device can more comprehensively fit the well wall for cleaning, improving the dredging coverage rate. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present invention and these drawings without any creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of a groundwater monitoring well cleaning and dredging device according to one embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of a local structure in the embodiment; Figure 3 for Figure 1 Another perspective structural diagram in the embodiment; Figure 4 for Figure 3 A partially enlarged structural diagram of section A in the middle; Figure 5 for Figure 1 A schematic diagram of the flushing component in the embodiment; Figure 6 for Figure 1 A schematic diagram of the filter box structure in the embodiment; In the diagram: Insertion tube-1, first fan-shaped swing component-2, first arc-shaped guide groove-201, annular guide groove-202, strip guide groove-203, flushing component-3, sliding insertion part-301, mounting groove part-302, cleaning wheel-310, first sleeve-4, first connecting rod-5, sludge receiving hopper-6, baffle part-601, liquid flow pipe-7, liquid outlet end-701, rotary joint-8, liquid inlet pipe-801, support Support frame-9, support rod-901, rotation drive-10, lead screw-11, lead screw block-12, filter box-13, slag retention chamber-1301, filter screen-14, liquid flow chamber-1302, negative pressure pump-15, inlet pump-16, third sleeve-17, second connecting rod-18, second fan-shaped swing member-19, sliding part-1901, second arc-shaped guide groove-1902, linear drive-20. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it.

[0016] To keep the drawings concise, each drawing only schematically shows the parts relevant to the invention; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0017] In this document, 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 fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0018] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0019] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0020] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] like Figures 1-6 As shown, this invention illustrates a groundwater monitoring well cleaning and dredging device according to an embodiment of the present invention. In practical application, the insertion pipe 1 serves as the basic supporting component of the device. Its shape is adapted to the well structure of the groundwater monitoring well and can be vertically inserted into the well through the wellhead. Several first fan-shaped swing members 2 are fixed to the outer wall of the insertion pipe 1 in a circumferentially spaced manner. Each first fan-shaped swing member 2 is evenly distributed along the circumference of the insertion pipe 1, forming an umbrella-like arrangement. The first arc-shaped guide groove 201 on the first fan-shaped swing member 2 has an arc contour that adapts to the curvature of the inner wall of the monitoring well. The first arc-shaped guide grooves 201 on multiple first fan-shaped swing members 2 are spatially connected to each other, forming an annular guide groove 202. The annular guide groove 202 is arranged around the insertion pipe 1 and has an opening for the flushing member 3 to enter and exit. At the same time, an adjustment mechanism is also provided at the opening. The adjustment mechanism includes an adjustment rod hinged to the end of the first fan-shaped swing member 2, and the other end of the adjustment rod is threadedly connected to the adjustment seat on the insertion pipe 1. The flushing component 3 is designed to slide along the guide rail trajectory within the annular guide groove 202. Its engagement with the annular guide groove 202 is an embedded sliding connection; that is, the flushing component 3 has a sliding part 1901 that matches the shape of the annular guide groove 202. This sliding part 1901 can slide freely within the guide rail but will not detach from it. The cleaning wheel 310 is mounted on the side of the flushing component 3 facing the well wall via a rotating shaft. A bearing is provided between the rotating shaft and the flushing component 3 to ensure that the cleaning wheel 310 can rotate flexibly.

[0022] When the equipment is working, the flushing component 3 is driven to slide within the annular guide groove 202 via an external drive device or its own hydraulic drive. As the flushing component 3 moves, the cleaning wheel 310 gradually contacts the inner wall of the well and generates a rolling contact effect. The surface of the cleaning wheel 310 is provided with staggered protrusions. These protrusions can effectively scrape the sludge attached to the inner wall of the well during the rolling process, separating it from the well wall and achieving the cleaning operation of the inner wall of the well. During the sliding process of the flushing component 3, if the inner wall of the well is locally uneven, the first fan-shaped swing component 2 can adaptively swing and adjust to ensure that the distance between the annular guide groove 202 and the inner wall of the well is always within a reasonable range, thereby ensuring stable contact between the cleaning wheel 310 and the well wall. After cleaning is completed, the flushing component 3 can be removed from the guide rail through the opening, and the annular guide groove 202 can be retracted through the adjustment mechanism to facilitate the disassembly and transportation of the equipment.

[0023] This equipment further enhances its performance through the coordinated operation of the insertion tube 1, the first sector-shaped swing component 2, the flushing component 3, and the adjustment mechanism. The adjustment mechanism at the opening of the annular guide groove 202 allows for flexible adjustment of the guide rail radius according to the inner diameter of different monitoring wells. Compared to traditional fixed-size dredging equipment that struggles to adapt to various well diameters, this equipment can meet the dredging needs of monitoring wells of different specifications, expanding its application range. The adjustment mechanism controls the swing of the first sector-shaped swing component 2 via a threaded connection. Its simple structure and high adjustment precision ensure a tight fit between the annular guide groove 202 and the well wall while preventing damage to the well wall due to excessive compression. The non-closed opening design of the annular guide groove 202 not only facilitates the installation and disassembly of the sweeping component 3, but also provides space for the swinging of the first fan-shaped swing component 2 when adjusting the guide rail radius, making the radius adjustment process smoother. Compared with traditional high-pressure water jet dredging equipment, which suffers from loss of equipment posture due to high recoil force, this equipment uses the sweeping component 3 to drive the cleaning wheel 310 to roll and clean. The resulting force is smaller and the direction is controllable, avoiding excessive impact on the equipment itself and the well wall structure, effectively avoiding the risk of equipment posture loss of control and reducing the difficulty of downhole operation. The insertion pipe 1 serves as the overall support, and together with the circumferentially spaced and swingable first fan-shaped swing component 2, the annular guide groove 202 can adapt to different well wall conditions. Compared with traditional dredging equipment, which cannot flexibly adapt to the unevenness of the well wall, this equipment can more comprehensively conform to the well wall for cleaning, improving the dredging coverage. The sliding design of the flushing component 3 within the annular guide groove 202 allows the cleaning wheel 310 to perform continuous cleaning operations along the circumference of the well wall. This changes the current situation of low efficiency and high cost of manual cleaning, eliminating the need for manual operation below the well, reducing labor costs and safety risks, and especially avoiding accidents such as oxygen deficiency and suffocation, and mechanical injuries that are prone to occur in confined spaces. The rolling contact method between the cleaning wheel 310 and the inner wall of the well, through the scraping of silt by the surface protrusions, significantly reduces the wear and tear on the cleaning wheel 310 and related components compared to the erosion and wear caused by high-speed water flow carrying silt particles in traditional equipment. This extends the service life of the core components, reduces equipment maintenance costs and replacement frequency, improves the durability and reliability of the equipment, and thus ensures the long-term stable operation of the groundwater monitoring well, ensuring the accuracy of monitoring data such as water level and water quality.

[0024] In some examples, the first sector-shaped swing member 2 is hinged to the outside of the insertion tube 1 at the included angle vertex, and the hinge shaft is arranged tangentially along the tube wall, allowing it to swing radially to adjust the radius of the annular guide groove 202. The first arc-shaped guide grooves 201 on the outside of each sector-shaped member are spliced ​​to form the annular guide groove 202. The swing angle of the sector-shaped member is controlled by a drive mechanism: when the sector-shaped member swings outward from the insertion tube 1, the interval between adjacent sector-shaped members increases and the guide rail radius increases; when swinging inward, the interval decreases and the radius decreases. In actual operation, the swing angle of the sector component is first adjusted according to the inner diameter of the monitoring well to maintain a preset distance between the outer edge of the annular guide groove 202 and the well wall, and then the flushing component 3 is driven to slide along the guide rail. When the cleaning wheel 310 encounters a local protrusion or depression in the well wall, the first sector swing component 2 automatically adjusts the swing angle. By dynamically changing the interval between adjacent sector components, the guide rail radius is adaptively adjusted to ensure that the cleaning wheel 310 always maintains stable contact with the well wall.

[0025] This design achieves continuous adjustment of the radius of the annular guide groove 202 through the radial oscillation of the fan-shaped component. Compared with traditional rigid structures, it can adapt to monitoring wells with different inner diameters and eliminate blind spots in dredging. The tangential hinged connection ensures that the guide rail maintains a circular profile during adjustment, preventing the flushing component 3 from jamming and improving operational stability. When the well wall exhibits irregular shapes, the fan-shaped component can adaptively oscillate in real time, preventing the cleaning wheel 310 from colliding hard with the well wall while maintaining stable dredging pressure and ensuring continuous operation.

[0026] In some examples, the sludge collecting hopper 6 is an annular groove structure, with its inner wall fixedly connected to the outer circumference of the first sleeve 4, and the radial width of the sludge collecting hopper 6 is greater than the diameter of the cleaning wheel 310. The first connecting rod 5 passes through the bottom plate of the sludge collecting hopper 6 and is rigidly connected to it, so that the sludge collecting hopper 6 and the flushing component 3 form a linkage relationship. The baffle 601 is provided on the outer edge of the sludge collecting hopper 6, and its cross-section is L-shaped. The vertical section slides against the inner wall of the well, and the horizontal section extends to the top of the groove of the sludge collecting hopper 6. When the external drive device drives the first sleeve 4 to rotate, the first connecting rod 5 drives the flushing component 3 to slide along the annular guide groove 202, and the sludge collecting hopper 6 rotates synchronously. The sludge generated by the cleaning wheel 310 scraping the well wall falls into the sludge collecting hopper 6 under the action of gravity. The vertical section of the baffle 601 prevents the sludge from splashing outward, and the horizontal section prevents the sludge from scattering outside the sludge collecting hopper 6 during the falling process.

[0027] The linkage design of the first sleeve 4 and the first connecting rod 5 synchronizes the sliding motion of the sweeping component 3 with the rotational motion of the sludge collecting hopper 6, avoiding the problem of sludge scattering caused by the separation of sweeping and collection actions in traditional sludge removal equipment. The layout of the sludge collecting hopper 6 directly below the cleaning wheel 310 utilizes gravity to achieve natural sludge collection, eliminating the need for an additional power unit, reducing energy consumption while improving collection efficiency. The double limiting structure of the retaining edge 601, through sliding contact with the well wall, guides the sludge into the sludge collecting hopper 6 and also performs secondary scraping on the well wall during the rotation of the sludge collecting hopper 6 to remove residual sludge. This design integrates sludge removal and collection functions into the same drive system, making the equipment structure more compact and achieving efficient integrated sludge cleaning and collection operations within a limited downhole space. It is especially suitable for monitoring wells with greater depths, reducing the operational costs of multiple downhole sludge removal operations.

[0028] In some examples, the liquid flow pipe 7 extends along the length of the flushing component 3, with its outlet end 701 located on the side of the flushing component 3 away from the cleaning wheel 310, and the outlet direction forming an acute angle with the tangent direction of the annular guide groove 202. The rotary joint 8 is rotatably sleeved on the outside of the insertion tube 1 via a bearing, and located above the first sleeve 4. Its outer circumferential surface has a radially extending inlet pipe 801. The inner end of the inlet pipe 801 communicates with the annular inner cavity of the rotary joint 8, and the outer end is connected to an external liquid source, such as a high-pressure water pump, via the rotary joint. Multiple outlets are evenly distributed circumferentially on the lower end face of the rotary joint 8, and each outlet is sealed to the inlet end of the corresponding flushing component 3's liquid flow pipe 7 via a hose 9. When the high-pressure cleaning fluid enters the rotary joint 8 from the inlet pipe 801, it is distributed to each hose 9 through the annular inner cavity and then flows into the liquid flow pipe 7. When the cleaning fluid is ejected at high speed from the outlet 701, the reaction force pushes the flushing component 3 to slide along the annular guide groove 202, which in turn drives the first sleeve 4 and the sludge receiving hopper 6 to rotate synchronously through the first connecting rod 5. The cleaning fluid ejected from the outlet 701 directly impacts the well wall, and the auxiliary cleaning wheel 310 removes stubborn deposits, while simultaneously flushing the scraped sludge into the sludge receiving hopper 6.

[0029] This design utilizes the reaction force of the fluid flow to drive the movement of the flushing component 3, avoiding the problem of transmission components being easily corroded by sludge in traditional mechanical drive methods, and improving the reliability of the equipment in harsh environments. The opposite arrangement of the fluid flow pipe 7 and the cleaning wheel 310 allows the high-pressure cleaning fluid to pre-flush the well wall while pushing the flushing component 3 to slide, softening the stubborn sludge layer and significantly improving the efficiency of subsequent mechanical scraping. The annular distribution structure of the rotary joint 8 ensures that multiple flushing components 3 receive a stable fluid flow simultaneously, achieving uniform flushing and sludge removal in the circumferential direction. The flexible connection design of the hose 9 ensures the sealing of the fluid flow transmission and allows the flushing component 3 to swing freely during the adjustment of the guide rail radius, enhancing the adaptability of the equipment to different well diameters.

[0030] In some examples, the horizontal cross-section of the sliding insertion part 301 is a rounded rhombus, with the long diagonal of the rhombus aligned with the sliding direction of the flushing member 3. The four corners are rounded to reduce sliding resistance. The annular guide groove 202 is formed by splicing together the first arc-shaped guide grooves 202 of each of the first fan-shaped swing members 2. The cross-sectional profile of the guide groove is adapted to the rounded rhombus sliding insertion part 301, forming a convex-concave guide structure. The sliding insertion part 301 is embedded in the guide groove, with its rhomboid apex contacting the inner wall of the guide groove. A small gap is reserved in the rounded corner area to allow the sliding insertion part 301 to slightly deflect within the guide groove. The mounting groove 302 is located at the center of the bottom of the flushing component 3 and is a rectangular groove structure with a keyway on its inner wall. The top of the first connecting rod 5 has matching key teeth, and torque is transmitted through the key connection. When the first sleeve 4 rotates, the first connecting rod 5 drives the flushing component 3 to move. The rounded rhomboid section of the sliding insertion part 301 slides in the guide groove. The apex of the rhomboid guides the direction of movement along the guide groove trajectory. When the guide rail radius changes, causing the guide groove spacing to change, the rounded area adaptively adjusts the contact position through a slight deflection to avoid jamming.

[0031] The rounded rhomboid cross-section design of the sliding insertion part 301 reduces sliding friction through point contact between the rhomboid vertices and the guide groove. Simultaneously, the rounded corners eliminate stress concentration that might occur at right angles, making the sliding of the flushing component 3 within the annular guide groove 202 smoother and more fluid. The geometric characteristics of the rhomboid cross-section allow the sliding insertion part 301 to compensate for changes in the guide groove dimensions when the guide groove spacing changes, such as when the radius of the annular guide groove 202 is adjusted or when irregularities in the well wall cause local deformation of the guide rail. This maintains a stable sliding fit without jamming, significantly improving the adaptability of the flushing component 3 to changes in the guide rail shape. Compared to traditional rectangular or T-shaped cross-sections, this design, while ensuring guiding accuracy, provides greater flexibility to the sliding connection structure. Especially when the radius of the annular guide groove 202 changes due to the swing of the first fan-shaped swinging component 2, it effectively avoids the risk of motion stagnation or disengagement caused by improper fit clearance, ensuring the continuity and reliability of dredging operations. The key connection structure and the rounded rhomboid sliding insertion part 301 work together to form a transmission system that combines rigidity and flexibility. This system not only ensures the effective transmission of torque, but also adapts to complex downhole environments through the adaptive adjustment of the sliding part 1901, thereby improving the overall performance of the equipment.

[0032] In some examples, the third sleeve 17 is slidably fitted onto the outside of the insertion tube 1 via a linear bearing. Multiple hinge seats are evenly distributed circumferentially on its outer surface, each hinge seat corresponding to a second connecting rod 18. The second fan-shaped swing member 19 has a fan-shaped plate structure, with a sliding portion 1901 at the center of its straight edge away from the arc edge. This sliding portion 1901 is a cylindrical protrusion that can slide within the strip-shaped guide groove 203 on the side of the first fan-shaped swing member 2. A second arc-shaped guide groove 1902 is formed on the arc-shaped edge of the second fan-shaped swing member 19, with a curvature consistent with the first arc-shaped guide groove 201. When the third sleeve 17 slides upward along the insertion tube 1, the lower end of the second connecting rod 18 is driven upward. Due to the limiting effect of the sliding portion 1901 within the strip-shaped guide groove 203, the second fan-shaped swing member 19 is forced to swing radially inward towards the insertion tube 1. At this time, the sliding part 1901 slides towards the insertion tube 1 within the strip guide groove 203, while the second fan-shaped oscillating member 19 pushes the adjacent first fan-shaped oscillating member 2 to retract synchronously, reducing the circumferential interval between adjacent fan-shaped members and thus reducing the overall radius of the annular guide groove 202. During this process, the first arc-shaped guide groove 201 and the second arc-shaped guide groove 1902 always maintain a smooth joint, ensuring that the sliding part 301 of the flushing member 3 can pass smoothly through the joint.

[0033] This design, through the linkage mechanism between the third sleeve 17 and the second connecting rod 18, achieves a secondary adjustment function for the radius of the annular guide groove 202, significantly improving the equipment's adaptability to different well diameters. The insert-type structure of the second fan-shaped swing member 19 increases the circumferential length of the guide rail. The cooperation between the strip guide groove 203 and the sliding part 1901 transforms the linear motion of the third sleeve 17 into the swing motion of the fan-shaped member, making the radius adjustment process more stable and controllable.

[0034] In some examples, the linear drive 20 is an electric actuator structure. Its fixed end is connected to the outside of the insertion tube 1 via a mounting base, located directly below the third sleeve 17. The feed end pushes vertically upward against the bottom end face of the third sleeve 17. The telescopic axis of the electric actuator is parallel to the axis of the insertion tube 1, and its internal motor is connected to the ground control system via a control line. The lower end face of the third sleeve 17 is provided with an abutment groove that matches the feed end of the electric actuator, ensuring the uniform transmission of the pushing force.

[0035] When the radius of the annular guide groove 202 needs to be adjusted, the ground control system sends an electrical signal to the linear drive 20, causing the feed end of the electric push rod to extend upward and push the third sleeve 17 to slide upward along the outer wall of the insertion tube 1. The upward movement of the third sleeve 17 drives the second fan-shaped swing member 19 to swing inward toward the insertion tube 1 through the second connecting rod 18, while simultaneously pushing the first fan-shaped swing member 2 to retract inward, thereby reducing the radius of the annular guide groove 202; conversely, when the electric push rod retracts, the third sleeve 17 moves downward under the action of gravity, and the fan-shaped member swings outward, increasing the radius of the guide rail.

[0036] The linear drive component 20 enables automated adjustment of the radius of the annular guide groove 202, significantly improving the ease of operation and adjustment accuracy compared to manual adjustment. The linear thrust of the electric actuator acts directly on the third sleeve 17, avoiding energy loss in traditional mechanical transmission and making the radius adjustment process smoother and more reliable. The extension and retraction of the linear drive component 20 can be remotely controlled via the ground control system, allowing for real-time dynamic adjustment of the guide rail radius according to the well wall shape. This is particularly suitable for complex monitoring wells where the well diameter varies along the depth, ensuring that the dredging operation remains in close contact with the well wall throughout the entire process.

[0037] In some examples, the support frame 9 is an I-shaped frame structure, with the support rods 901 at both ends extending outward to form horizontal resting ends. The length of these resting ends is greater than the diameter of the monitoring wellhead, used to stably support the frame on the ground around the wellhead. A rotating drive component 10 is vertically mounted in the middle of the support frame 9. This drive component is preferably a servo motor, and its output shaft is coaxially connected to the top of the lead screw 11 via a coupling. The lead screw 11 is arranged vertically along the axis of the insertion tube 1, and its lower end is fixed to the bottom of the support frame 9 via a bearing seat. A nut block 12 is fixedly connected to the outer wall of the top of the insertion tube 1. This nut block 12 and the lead screw 11 form a lead screw-nut transmission pair, and the inner wall of the nut block has an internal thread profile that matches the thread of the lead screw 11. When the drive unit 10 is energized, the lead screw 11 rotates synchronously, and the lead screw block 12 moves up and down along the axis of the lead screw 11 under the action of thread engagement, thereby driving the insertion tube 1 to rise and fall as a whole. To ensure the stability of the insertion tube 1 during the lifting process, the support frame 9 is provided with guide rails on both sides, and the outer wall of the insertion tube 1 is provided with guide blocks that cooperate with the rails, forming a vertical guide and limiting structure. In actual operation, the support frame 9 is first fixed to the wellhead by the support rod part 901, and then the drive unit 10 is used to control the insertion tube 1 to be lowered to the target depth, so that the annular guide groove 202 is aligned with the well wall area to be cleaned. After the sludge removal is completed, the lead screw 11 is driven in the opposite direction to lift the equipment to the ground.

[0038] The design of the support frame 9 and the screw drive mechanism creates a fully automatic lifting system for the equipment, completely changing the traditional manual lifting method of dredging equipment. The outward-expanding structure of the support rod 901 provides a stable support base, avoiding the risk of equipment tilting or falling due to uneven force during manual operation, and is especially suitable for slippery or soft wellhead environments. The screw nut drive pair has high-precision transmission characteristics, which can control the lifting accuracy of the insertion tube 1 within ±2mm, ensuring that the cleaning wheel 310 is accurately aligned with the silt adhesion area at different depths, solving the problem of difficult precise positioning when manually lowering the well.

[0039] In some examples, the filter box 13 has a rectangular box structure, with its interior horizontally divided into upper and lower spaces by a removable filter screen 14, forming a sludge retention chamber 1301 and a liquid flow chamber 1302, respectively. The filter screen 14 is made of metal woven mesh with a mesh size smaller than the particle size of the sludge, ensuring that the sludge is effectively retained. The negative pressure pump 15 is fixedly installed at the top inside the sludge retention chamber 1301, and its suction port is sealed to the drain port at the bottom of the sludge receiving hopper 6 through a flexible suction pipe. A one-way valve is provided at the drain port to prevent sludge backflow. A drain pipe is provided at the bottom of the side wall of the liquid flow chamber 1302 for discharging the filtered clean liquid. Once the sludge collection hopper 6 is full, the negative pressure pump 15 is activated, creating negative pressure in the suction pipe to draw the sludge mixture from the sludge collection hopper 6 into the sludge retention chamber 1301. Under the influence of gravity and negative pressure, the sludge falls onto the upper surface of the filter screen 14, while the liquid flows through the pores of the filter screen 14 into the liquid flow chamber 1302, achieving solid-liquid separation. To prevent clogging of the filter screen 14 and its impact on filtration efficiency, a vibration device is installed in the sludge retention chamber 1301. Periodic vibration loosens the sludge on the filter screen 14, ensuring smooth liquid passage. The combined design of the filter box 13 and the negative pressure pump 15 enables automated sludge collection and solid-liquid separation during dredging operations, solving the problem of manual sludge removal required by traditional dredging equipment. Compared to gravity discharge, negative pressure suction more efficiently transfers the sludge from the sludge collection hopper 6 to the filter box 13, and is particularly suitable for highly viscous sludge, preventing residue and secondary pollution. The layered filtration structure of filter 14 allows the liquid generated during dredging to be purified and then directly discharged or recycled, reducing water waste and meeting environmental protection requirements.

[0040] In some examples, the inlet pump 16 is a corrosion-resistant centrifugal pump, fixedly installed on the outer wall of the filter box 13. Its inlet end is connected to the bottom of the liquid flow chamber 1302 via a pipe, and its outlet end is sealed to the inlet pipe 801 of the rotary joint 8 via a high-pressure hose. After being pressurized by the inlet pump 16, the residual liquid in the liquid flow chamber 1302 enters the annular inner cavity of the rotary joint 8 through the inlet pipe 801, and is then distributed to the liquid flow pipe 7 of the flushing component 3 through various hoses 9, and finally sprayed out at high speed from the outlet end 701. The liquid circulation system constructed by the inlet pump 16 reuses the filtered residual liquid as flushing power and cleaning medium, realizing the closed-loop utilization of water resources. Compared with the operation mode of traditional dredging equipment that continuously consumes external water sources, it can save more than 70% of water consumption and significantly reduce operating costs. The recycling of residual liquid avoids the secondary pollution that may be caused by direct discharge, and is especially suitable for the maintenance of monitoring wells in ecologically fragile areas. The fine filtration device ensures the cleanliness of the circulating liquid flow, prevents residual particles from causing wear on the flushing components 3 and the liquid flow pipes 7, and extends the service life of the equipment.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A well-washing and dredging device for groundwater monitoring wells, characterized in that, include: Insert tube (1); The first sector-shaped oscillating component (2) has a plurality of components. The plurality of first sector-shaped oscillating components (2) are arranged circumferentially on the insertion tube (1). The first sector-shaped oscillating component (2) is provided with a first arc-shaped guide groove (201). The first arc-shaped guide grooves (201) on the plurality of first sector-shaped oscillating components (2) together form an annular guide groove (202). The flushing component (3) is slidably disposed in the annular guide groove (202), and a cleaning wheel (310) is rotatably provided on the flushing component (3). The flushing component (3) is configured such that after rotation, it drives the cleaning wheel (310) to roll and abut against the inner wall of the well, for cleaning the inner wall of the well. The first fan-shaped swing member (2) is hinged to the insertion tube (1), and the hinge axis is along the tangent of the tube wall of the insertion tube (1). After the first fan-shaped swing member (2) is configured to swing, the interval between adjacent first fan-shaped swing members (2) is expanded or reduced, so that the radius of the annular guide groove (202) is increased or decreased. The flushing component (3) is provided with a liquid flow pipe (7). The liquid outlet (701) of the liquid flow pipe (7) and the cleaning wheel (310) are located on opposite sides of the flushing component (3). The flushing component (3) is configured such that after the liquid outlet (701) discharges liquid, the flushing component (3) is driven to slide along the annular guide groove (202) by the force of the liquid flow.

2. The groundwater monitoring well cleaning and dredging equipment according to claim 1, characterized in that, Also includes: The first sleeve (4) is rotatably mounted on the wall of the insertion tube (1), and the flushing component (3) is connected to the first sleeve (4) through the first connecting rod (5). A silt-receiving bucket (6) is provided on the first sleeve (4), and the first connecting rod (5) is connected to the silt-receiving bucket (6). The silt-receiving bucket (6) is located below the flushing member (3). The flushing member (3) is configured to drive the silt-receiving bucket (6) to rotate synchronously through the first connecting rod (5) after being placed in the annular guide groove (202). A retaining edge (601) is provided on one side of the silt-receiving bucket (6), and the retaining edge (601) is used to slide against the inner wall of the well.

3. The groundwater monitoring well cleaning and dredging equipment according to claim 2, characterized in that, Also includes: Rotary joint (8), the rotary joint (8) is rotatably disposed on the wall of the insertion tube (1), the rotary joint (8) is located above the first sleeve (4), the rotary joint (8) is provided with a liquid inlet pipe (801), one end of the liquid inlet pipe (801) is connected to the liquid flow pipe (7), and the other end is used to connect to the external liquid inlet source.

4. The well-washing and dredging equipment for groundwater monitoring wells according to claim 2, characterized in that, The top surface of the flushing component (3) is provided with a sliding insertion part (301), which is used to extend into the annular guide groove (202) and slide under the guidance of the annular guide groove (202); the bottom of the flushing component (3) is provided with a mounting groove (302), and one end of the first connecting rod (5) is inserted into the mounting groove (302).

5. The well-washing and dredging equipment for groundwater monitoring wells according to claim 1, characterized in that, Each of the first sector-shaped oscillating components (2) has a radially oriented guide groove (203) on both sides of its straight edge, and also includes: The third sleeve (17) is slidably mounted on the insertion tube (1). Several second connecting rods (18) are hinged to the third sleeve (17). A second fan-shaped swing member (19) is provided at the other end of each second connecting rod (18). A sliding part (1901) is provided at one end of each second fan-shaped swing member (19), which slides within the strip guide groove (203). The second fan-shaped swing member (19) is located between two adjacent first fan-shaped swing members (2). The second fan-shaped swing member (19) has a second… The second arc-shaped guide groove (1902) is used to cooperate with the first arc-shaped guide groove (201) to increase the length of the annular guide groove (202). The second connecting rod (18) is configured such that after one end is driven to slide upward by the third sleeve (17), the second connecting rod (18) drives the second fan-shaped swing member (19) and then drives the first fan-shaped swing member (2) to retract synchronously, so as to reduce the distance between the first fan-shaped swing member (2) and the second fan-shaped swing member (19), thereby reducing the length of the annular guide groove (202).

6. The well-washing and dredging equipment for groundwater monitoring wells according to claim 5, characterized in that, A linear drive (20) is provided on the wall of the insertion tube (1). The linear drive (20) is located below the third sleeve (17). The feed end acts on the third sleeve (17) to push the third sleeve (17) upward.

7. The groundwater monitoring well cleaning and dredging equipment according to claim 1, characterized in that, Also includes: A support frame (9) has support rods (901) extending from both ends. The support frame (9) is used to be erected at the wellhead via the support rods (901). The support frame (9) is provided with a rotation drive (10) and a lead screw (11) driven and engaged by the rotation drive (10). The insertion tube (1) is provided with a lead screw block (12) that engages with the lead screw (11). The rotation drive (10) is configured to drive the lead screw (11) to rotate and then drive the insertion tube (1) to move up and down via the lead screw block (12).

8. The well-washing and dredging equipment for groundwater monitoring wells according to claim 3, characterized in that, Also includes: The filter box (13) is divided into a sludge retention chamber (1301) and a liquid flow chamber (1302) by a filter screen (14). A negative pressure pump (15) is provided in the sludge retention chamber (1301). The negative pressure pump (15) is connected to the sludge receiving hopper (6) and is used to draw the sludge in the sludge receiving hopper (6) into the sludge retention chamber (1301) and allow the liquid filtered by the filter screen (14) to flow into the liquid flow chamber (1302).

9. The groundwater monitoring well cleaning and dredging equipment according to claim 8, characterized in that, An inlet pump (16) is provided on one side of the liquid flow chamber (1302). The two ends of the inlet pump (16) are connected to the liquid flow chamber (1302) and the inlet pipe (801) respectively, and are used to pump the residual liquid separated from the slag retention chamber (1301) through the filter screen (14) to the outlet end (701) of the flushing component (3).

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