A small-bore monitoring well is provided with a pneumatic stirring type dredging device

Abstract

The application relates to the technical field of underground water dredging equipment, in particular to a pneumatic stirring type dredging device for a small-caliber monitoring well, which comprises a shell, a stirring head, a gas conveying pipe, an air compressor, a dredging system and a control system, the stirring head comprises a cylindrical main body, a plurality of main gas jet micro-holes are arranged on the side wall of the cylindrical main body, and the axis of each of the plurality of main gas jet micro-holes is arranged to be inclined to the central axis of the cylindrical main body by 40 degrees. The high-pressure airflow generated by the air compressor enters the cylindrical main body of the stirring head through the gas conveying pipe and a gas conveying channel, and is then jetted out from the plurality of main gas jet micro-holes arranged to be inclined to the central axis by 40 degrees. When the airflow is jetted out through the plurality of main gas jet micro-holes, the reaction force generated by the airflow drives the stirring head to rotate. Meanwhile, the inclined airflow forms an axial impact force which directly acts on the accumulated layer, and the rotation generates a circumferential vortex stirring force, so that the single impact mode of simple air blowing is replaced, and the breaking capacity for the hardened accumulation is strengthened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of underground water dredging equipment, in particular to a pneumatic stirring type dredging device for small-diameter monitoring wells. BACKGROUND

[0002] Small-diameter monitoring wells are widely used in the monitoring of underground water level, water temperature and water quality; however, with the passage of time, the silt in the stratum continuously enters the well along with the water flow and gradually deposits at the bottom of the well under the action of gravity, resulting in the problem of silt accumulation in the monitoring well; which interferes with the collection of water samples, reduces the quality of the collected samples, and even causes the monitoring well to lose its use function due to the occupation of its space.

[0003] Currently, the dredging technology for small-diameter monitoring wells mostly uses a motor as a power source, a double-shaft motor lower end rotating shaft body is connected to a reducer to drive a stirring paddle, the silt accumulated at the bottom of the well is stirred with water to form a mixture, and then a booster impeller provided at the upper end of the double-shaft motor is used to pump the mixture out of the monitoring well; although this type of device can solve the problem of dredging to some extent, the motor and related transmission components are relatively large in size, which makes it inconvenient to install and operate in the narrow space of a small-diameter monitoring well, and the motor is prone to failure when working in a humid and muddy environment for a long time, resulting in high maintenance costs.

[0004] In view of the above problems, the prior art proposes some solutions, for example, the utility model patent with patent application number CN202421745905.7 discloses a kind of pneumatic stirring type dredging device for small-bore monitoring well, which comprises air compressor and tripod, air compressor is detachably connected with high-pressure air pipe, high-pressure air pipe is high-pressure rubber pipe, high-pressure air pipe is detachably connected with flushing head or gas-liquid mixer, flushing head inner diameter is 1 / 2 of high-pressure air pipe inner diameter, gas-liquid mixer is detachably connected with bottom suction pipe and gas-liquid return pipe, gas-liquid return pipe is detachably connected with solid-liquid separation device, solid-liquid separation device is detachably connected with recharge pipeline, recharge channel, bottom suction pipe and gas-liquid return pipe are flexible channels, tripod is fixedly connected with pulley, pulley is movably connected with high-pressure air pipe;When positive circulation module works, external air is compressed by air compressor, compressed air passes through high-pressure air pipe and forms high-speed airflow through flushing head and is sprayed out, high-speed airflow impacts bottom silt and agitates it, or high-speed airflow flushes blocked pore, to improve the permeability of well bottom;When reverse circulation module works, compressed gas enters gas-liquid mixer through high-pressure air pipe and forms bubbles, when bubbles are discharged from bottom suction pipe or gas-liquid return pipe, gas pressure in gas-liquid mixer is lower than that of external air, so as to drain well water into gas-liquid mixer, when bubbles mix with well water, a vortex is formed, so as to further drain well water, when well water enters gas-liquid return pipe, negative pressure is generated in gas-liquid return pipe due to continuous gas discharge at outlet end of gas-liquid return pipe, and continuously rising gas pushes well water, finally, well water is discharged through gas-liquid return pipe under the action of negative pressure and gas pushing;But the existing pneumatic stirring type dredging device simply relies on air blowing for dredging, and has the problems of insufficient stirring intensity and poor cleaning effect on hardened silt. SUMMARY

[0005] The present application aims to provide a kind of pneumatic stirring type dredging device for small-bore monitoring well, to solve the problems of insufficient stirring intensity and poor cleaning effect on hardened silt of the existing pneumatic stirring type dredging device simply relying on air blowing for dredging.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] The utility model provides a kind of small-bore monitoring well is with pneumatic stirring type dredging device, including shell, stirring head, gas pipe, air compressor, dredging system and control system, the stirring head rotation is connected on the lower end surface of shell, the shell is opened in with gas passage and dredging passage, the two ends of gas pipe are respectively communicated with air compressor and the upper end of gas passage, the dredging passage is communicated with dredging system, the shell is opened with dredging mouth, the control system is electrically connected with air compressor and dredging system, the stirring head includes cylindrical main body, the sidewall of cylindrical main body is opened with multiple main jet micro-pores, multiple main jet micro-pores are all communicated with gas passage, and the axis of multiple main jet micro-pores is all with the center axis of cylindrical main body 30 °-45 ° inclination setting;When small-bore monitoring well is with pneumatic stirring type dredging device operation, the high-pressure airflow generated by air compressor enters the cylindrical main body of stirring head via gas pipe and gas passage, then is sprayed from multiple with the center axis of cylindrical main body 30 °-45 ° inclination setting main jet micro-pore, and the reaction force generated when airflow is sprayed drives stirring head to rotate, and while inclined airflow forms axial impact force and is directly applied to silt layer, and because of rotation, circumferential vortex stirring force is generated, replace single impact mode of pure air blowing, and the breaking capacity to harden silt is strengthened;The problem that stirring intensity is insufficient and breaking capacity to harden silt is weak caused by pure air blowing of existing pneumatic stirring type dredging device is avoided, guarantee that small-bore monitoring well is with pneumatic stirring type dredging device has enough stirring intensity to break harden silt efficiently, simultaneously, it has the effect of large-scale action formed by rotary stirring, improves the cleaning effect and dredging efficiency of silt in small-bore monitoring well.

[0008] Preferably, the lower end surface of the cylindrical body is provided with a conical head, the conical tip of the conical head points downward, the taper angle of the conical head is 60°-90°, a plurality of auxiliary air jet micro-holes are formed in the side wall of the conical head, the plurality of auxiliary air jet micro-holes are in communication with the gas conveying channel, the axes of the plurality of auxiliary air jet micro-holes are inclined toward the tip of the conical head; when the pneumatic stirring type dredging device for small-diameter monitoring wells is in operation, part of the high-pressure airflow delivered by the air compressor enters the main air jet micro-holes of the cylindrical body through the gas conveying channel, and the other part enters the auxiliary air jet micro-holes of the conical head synchronously; the conical head can quickly cut into the hardened and accumulated layer in the monitoring well during the downward movement of the stirring head due to the design of the 60°-90° taper angle, and the airflow jetted by the auxiliary air jet micro-holes in the tip direction will directly impact the accumulated material around and deep in the conical head, forming a three-dimensional stirring force with the airflow of the main air jet micro-holes, and further breaking the hardened and accumulated layer in cooperation with the rotating action of the stirring head; the problems of the pneumatic stirring type dredging device for small-diameter monitoring wells, such as the difficulty in quickly breaking through the hardened and accumulated hard shell, the insufficient stirring of deep accumulated material, and the existence of dredging dead angles in narrow well bodies, are avoided, ensuring that the pneumatic stirring type dredging device for small-diameter monitoring wells has efficient hardened cutting performance, comprehensive deep stirring performance, and flexible operation performance suitable for small-diameter scenarios, ultimately enhancing the cleaning effect of the hardened and accumulated layer and improving the overall dredging efficiency.

[0009] Preferably, a spiral line is formed on the outer side wall of the cylindrical body, the plurality of main air jet micro-holes are uniformly distributed on the spiral line, and the diameters of the plurality of main air jet micro-holes gradually increase from the lower end to the upper end of the cylindrical body; when the pneumatic stirring type dredging device for small-diameter monitoring wells is in operation, the high-pressure airflow delivered by the air compressor enters the cylindrical body through the gas conveying channel, and is then jetted out from the main air jet micro-holes uniformly distributed on the spiral line, while the stirring head rotates under the action of the airflow; the spiral line distribution of the main air jet micro-holes makes the airflow form a spiral jet trajectory, and the diameters of the main air jet micro-holes gradually increase from the lower end to the upper end, so that the smaller diameter at the lower end can concentrate the airflow to generate stronger impact force to break the lower hardened and accumulated layer, and the larger diameter at the upper end can cover a wider range by diffusing the airflow to stir the upper loose accumulated material; the problems of the pneumatic stirring type dredging device for small-diameter monitoring wells, such as uneven stirring coverage caused by disordered distribution of traditional air jet micro-holes, difficulty in adapting different depths and hardnesses of accumulated material with a single diameter, and existence of local blind areas in dredging within narrow well bodies, are avoided, ensuring that the pneumatic stirring type dredging device for small-diameter monitoring wells has uniform stirring coverage performance and gradient-adapted impact performance, ultimately improving the cleaning specificity and overall dredging efficiency for different depths and hardnesses of accumulated material.

[0010] Preferably, the inside of the cylindrical body is provided with an air flow distribution cavity, which is in communication with the air conveying channel, and the inner wall of the air flow distribution cavity is provided with a spiral flow guide rib, the spiral direction of which is consistent with the spiral line of the main jet micro-hole; when the pneumatic stirring type dredging device for small-diameter monitoring wells is in operation, the high-pressure airflow delivered by the air compressor enters the air flow distribution cavity through the air conveying channel, and the spiral flow guide rib in the cavity, which has the same spiral direction as the spiral line of the main jet micro-hole, guides the airflow to flow along the spiral path, so that the airflow is orderly distributed to the main jet micro-hole and the auxiliary jet micro-hole, and the rotational kinetic energy of the airflow is enhanced to assist the rotation of the stirring head; this avoids the problems of large pressure loss caused by airflow turbulence in the cavity, uneven airflow output of the main jet micro-hole and the auxiliary jet micro-hole, insufficient or unstable rotational power of the stirring head, and ensures that the pneumatic stirring type dredging device for small-diameter monitoring wells has high-efficiency airflow utilization performance, balanced stirring performance, and stable rotational driving performance, thereby ultimately improving the stirring and breaking effect and the dredging efficiency of the accumulated material in the small-diameter monitoring well.

[0011] Preferably, an axially slidable flow guide sleeve is sleeved on the outer side wall of the cylindrical body, the side wall of the flow guide sleeve is provided with a flow guide hole corresponding to the main jet micro-hole, the diameter of the flow guide hole is larger than that of the corresponding main jet micro-hole, an installation groove is formed on the outer side wall of the cylindrical body, and an adjusting cylinder is installed in the installation groove and connected to the cylindrical body and the flow guide sleeve at the upper and lower ends, respectively; when the pneumatic stirring type dredging device for small-diameter monitoring wells is in operation, the adjusting cylinder can drive the flow guide sleeve sleeved on the outer side wall of the cylindrical body to slide axially, and the overlapping area of the flow guide hole with a larger diameter on the side wall of the flow guide sleeve and the main jet micro-hole is changed; when the stirring intensity needs to be increased to deal with the hardened accumulation, the adjusting cylinder drives the flow guide sleeve to slide so that the overlapping area of the flow guide hole and the main jet micro-hole increases, allowing more high-pressure airflow to be smoothly sprayed through the flow guide hole; when the stirring intensity needs to be reduced to deal with loose accumulation, the adjusting cylinder drives in the opposite direction to reduce the overlapping area and reduce airflow output; in this process, the flow guide hole always avoids additional resistance when the airflow is sprayed, ensuring stable airflow output. Through this dynamic operation and adjustment design, the problems of the traditional fixed jet structure in the pneumatic stirring type dredging device for small-diameter monitoring wells, such as the inability to flexibly adjust the stirring intensity according to the hardness of the accumulation, the insufficient intensity when facing hardened accumulation, the energy waste when facing loose accumulation, and the airflow turbulence during the adjustment process, which leads to the interruption of dredging, are avoided, thereby ensuring the dynamic adjustment performance of the pneumatic stirring type dredging device for small-diameter monitoring wells in the small-diameter monitoring well scene, which can adapt to the cleaning needs of different hardness of the accumulated layer in real time; the stable airflow output performance ensures the continuity of dredging without obvious airflow fluctuation during the adjustment process; the efficient energy consumption control performance adjusts the stirring intensity as needed to avoid energy waste; and ultimately improves the adaptability of the device to complex accumulation conditions and the overall dredging efficiency.

[0012] Preferably, a pressure sensor is installed at the tip of the conical head, and the pressure sensor is electrically connected to the control system; when the pneumatic stirring type dredging device for small-diameter monitoring wells is in operation, the pressure sensor at the tip of the conical head will be in real-time contact with the accumulated layer in the monitoring well, and the reaction force of the accumulated layer will be converted into an electrical signal and transmitted to the control system, and the control system can determine the hardness, thickness and degree of hardening of the accumulated layer by analyzing the pressure data; when the pressure value is high, the control system can adjust the output pressure of the air compressor to increase the jetting intensity, drive the adjusting cylinder to expand the flow guide hole and the main jet micro-hole, or adjust the rotation frequency of the stirring head; when the pressure value decreases, the control system reverses the adjustment parameters to avoid excessive energy consumption. Through the linkage operation design of "real-time monitoring-intelligent control", the problems of incomplete hardening cleaning or energy waste caused by inaccurate judgment of the accumulated condition and blind adjustment of the stirring intensity in the traditional non-monitoring design of the pneumatic stirring type dredging device for small-diameter monitoring wells, and the difficulty in controlling the operation progress due to the lack of feedback in the dredging process are avoided, thereby ensuring the accurate accumulated judgment performance of the pneumatic stirring type dredging device for small-diameter monitoring wells in the small-diameter monitoring well scene, and the accumulated state can be grasped in real time; the dynamic intelligent control performance can adaptively adjust the operation parameters according to the accumulated condition; the high-efficiency energy-saving performance avoids energy loss caused by blind operation; at the same time, the controllability of the dredging operation is also ensured, which ensures the accurate completion of the cleaning task in the narrow well body, and finally improves the overall dredging effect and operation efficiency.

[0013] Preferably, a plurality of stirring teeth are circumferentially distributed on the outer wall of the flow guide sleeve, the cross section of the plurality of stirring teeth is triangular, and the stirring teeth are made of stainless steel; when the pneumatic stirring type dredging device for small-diameter monitoring wells is in operation, the flow guide sleeve rotating with the cylindrical body will drive the circumferentially distributed stainless steel stirring teeth on the outer wall to rotate synchronously, and the triangular cross section of the stirring teeth can cut into the accumulated layer with sharp edges, realizing the synergistic effect of "mechanical crushing + pneumatic stirring" with high-pressure airflow; the problem of insufficient breaking force and low dredging efficiency caused by simply relying on air blowing in the pneumatic stirring type dredging device for small-diameter monitoring wells is avoided, and the pneumatic stirring type dredging device for small-diameter monitoring wells has stronger hardening and accumulated breaking capacity and more durable wear resistance, and the circumferentially distributed stirring teeth also expand the stirring coverage range, improving the dredging effect and operation efficiency in the small-diameter monitoring well.

[0014] Preferably, a plurality of sliding grooves are arranged on the side wall of the shell in a circumferential direction, the axes of the plurality of sliding grooves are perpendicular to the axis of the shell, the plurality of sliding grooves are in communication with the gas conveying channel, a plurality of sliding blocks are slidably connected in the plurality of sliding grooves, and a plurality of reeds are arranged in the plurality of sliding grooves, and the two ends of the reed are connected with the side wall of the sliding groove and the sliding block, respectively; when the small-diameter monitoring well pneumatic stirring type dredging device is in operation, the air compressor works to generate a high-pressure gas flow in the gas conveying channel, the gas flow pushes the sliding block in the sliding groove to slide outward along a direction perpendicular to the axis of the shell until the sliding block is attached to the inner wall of the monitoring well, at this time, the shell is stably fixed and avoids being dispersed by rotating synchronously with the stirring head; when the air compressor stops working, the pressure of the gas flow disappears, and the reed in the sliding groove pushes the sliding block back by relying on the elastic force of the reed, so that the sliding block is separated from the well wall, facilitating the device to be taken out or moved; the problems that the rotary force is lost due to the rotation of the shell with the stirring head, the actual working force of the stirring head is reduced, and the sliding block is difficult to move after the air compressor stops working are avoided, the efficient rotary force transmission performance of the small-diameter monitoring well pneumatic stirring type dredging device during dredging operation and the stable fixing performance during operation are ensured, and the device has the convenience of flexible movement after stopping.

[0015] Compared with the prior art, the beneficial effects of the present application are:

[0016] 1、The plurality of main gas jet micro-holes are arranged on the side wall of the cylindrical body, the axes of the plurality of main gas jet micro-holes are inclined at an angle of 30°-45° to the central axis of the cylindrical body, the reaction force generated when the gas flow is jetted out through the plurality of main gas jet micro-holes drives the stirring head to rotate, the axial impact force formed by the inclined gas flow directly acts on the accumulated layer, and the circumferential vortex stirring force is generated due to rotation, thereby replacing the single impact mode of pure gas blowing and enhancing the breaking capacity for the hardened accumulation.

[0017] 2、The plurality of main gas jet micro-holes are arranged on the helical line on the outer side wall of the cylindrical body, the diameters of the plurality of main gas jet micro-holes increase from the lower end to the upper end of the cylindrical body, the problems that the stirring coverage is uneven due to the disordered distribution of the traditional gas jet micro-holes in the small-diameter monitoring well pneumatic stirring type dredging device, the single aperture is difficult to adapt to different depths and hardnesses of the accumulation, and there is a local blind area in the dredging of the narrow well body are avoided, and the small-diameter monitoring well pneumatic stirring type dredging device has uniform stirring coverage performance and gradient-adaptive impact performance.

[0018] 3. This invention avoids the problems of traditional fixed jet structures in pneumatic stirring dredging devices for small-diameter monitoring wells, which cannot flexibly adjust the stirring intensity according to the hardness of the silt, have insufficient force when facing hardened silt, or waste energy when facing loose silt, by providing a flow guide sleeve that can be axially slidable on the outer wall of the cylindrical main body. The side wall of the flow guide sleeve has flow guide holes corresponding to the main jet micro-holes. This ensures the dynamic adjustment performance of the pneumatic stirring dredging device for small-diameter monitoring wells in the scenario of small-diameter monitoring wells, and can adapt to the cleaning needs of silt layers with different hardness in real time. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the pneumatic stirring dredging device for small-diameter monitoring wells according to the present invention;

[0020] Figure 2 This is a partial cross-sectional view of the pneumatic stirring dredging device for small-diameter monitoring wells according to the present invention;

[0021] Figure 3 For the present invention Figure 2 Sectional view at point AA;

[0022] Figure 4 For the present invention Figure 3 Sectional view at point BB;

[0023] Figure 5 For the present invention Figure 3 Sectional view at CC;

[0024] Figure 6 For the present invention Figure 3 A magnified view of a section at point D;

[0025] Figure 7 This is a schematic diagram of the internal structure of the stirring head in the pneumatic stirring dredging device for small-diameter monitoring wells of the present invention.

[0026] In the diagram: 1. Shell; 101. Air supply channel; 102. Sludge discharge channel; 103. Sludge discharge port; 2. Stirring head; 201. Cylindrical body; 202. Main jet micro-orifice; 203. Conical head; 204. Auxiliary jet micro-orifice; 205. Spiral line; 206. Airflow distribution chamber; 207. Spiral guide rib; 3. Air supply pipe; 4. Air compressor; 5. Sludge discharge system; 6. Control system; 701. Guide sleeve; 702. Guide hole; 703. Mounting groove; 704. Adjusting cylinder; 705. Pressure sensor; 801. Slide groove; 802. Slider; 803. Spring; 9. Stirring teeth. Detailed Implementation

[0027] Please see Figures 1 to 7 This invention provides a pneumatic stirring dredging device for small-diameter monitoring wells, the technical solution of which is as follows:

[0028] A small-diameter monitoring well pneumatic stirring type dredging device, please refer to Figures 1 to 7 , including the shell 1, stirring head 2, gas pipe 3, air compressor 4, discharge system 5 and control system 6, stirring head 2 rotationally connected on the lower end surface of shell 1, shell 1 is provided with gas passage 101 and discharge passage 102, the two ends of gas pipe 3 are communicated with air compressor 4 and the upper end of gas passage 101 respectively, discharge passage 102 is communicated with discharge system 5, shell 1 is provided with discharge port 103, control system 6 is electrically connected with air compressor 4 and discharge system 5, stirring head 2 includes cylindrical body 201, the side wall of cylindrical body 201 is provided with a plurality of main gas jet micro holes 202, a plurality of main gas jet micro holes 202 are communicated with gas passage 101, the axis of a plurality of main gas jet micro holes 202 is inclined to the central axis of cylindrical body 201 by 40 °, the side wall of shell 1 is circumferentially provided with a plurality of sliding grooves 801, the axis of a plurality of sliding grooves 801 is perpendicular to the axis of shell 1, a plurality of sliding grooves 801 are communicated with gas passage 101, a plurality of sliding grooves 801 are slidably connected with sliding block 802, a plurality of sliding grooves 801 are provided with reed 803, the two ends of reed 803 are connected with the side wall of sliding groove 801 and sliding block 802, the lower end surface of cylindrical body 201 is provided with conical head 203, the conical tip of conical head 203 points downward, the taper angle of conical head 203 is 80 °, the side wall of conical head 203 is provided with a plurality of auxiliary gas jet micro holes 204, a plurality of auxiliary gas jet micro holes 204 are communicated with gas passage 101, the axis of a plurality of auxiliary gas jet micro holes 204 is inclined to the tip direction of conical head 203, the outer side wall of cylindrical body 201 is provided with helical line 205, a plurality of main gas jet micro holes 202 are uniformly distributed on helical line 205, the aperture of a plurality of main gas jet micro holes 202 increases from the lower end to the upper end of cylindrical body 201, the inside of cylindrical body 201 is provided with airflow distribution cavity 206, airflow distribution cavity 206 is communicated with gas passage 101, the inner wall of airflow distribution cavity 206 is provided with helical flow guide rib 207, the rotation direction of helical flow guide rib 207 is consistent with the rotation direction of helical line 205 of main gas jet micro hole 202, the outer side wall of cylindrical body 201 is provided with axially slidable flow guide sleeve 701, the side wall of flow guide sleeve 701 is provided with flow guide hole 702 corresponding to main gas jet micro hole 202, the aperture of flow guide hole 702 is larger than the aperture of corresponding main gas jet micro hole 202, the outer side wall of cylindrical body 201 is provided with mounting groove 703, mounting groove 703 is provided with adjusting cylinder 704, the upper and lower ends of adjusting cylinder 704 are connected with cylindrical body 201 and flow guide sleeve 701 respectively, the outer wall of flow guide sleeve 701 is circumferentially provided with a plurality of stirring teeth 9, the cross section of a plurality of stirring teeth 9 is triangular, stirring teeth 9 is made of stainless steel, the tip of conical head 203 is provided with pressure sensor 705, pressure sensor 705 is electrically connected with control system 6.

[0029] In operation, refer to Figures 1 to 7 , the operator checks the integrity of each component of the device; confirm that the gas passage 101, the sludge passage 102 of the shell 1 is not blocked, the stirring head 2 is smoothly connected with the shell 1, the gas pipe 3 is sealed with the air compressor 4, the gas passage 101, the sludge system 5 is communicated with the sludge passage 102, the control system 6 is electrically connected with the air compressor 4, the sludge system 5, the pressure sensor 705 and the adjusting cylinder 704, and the device is slowly placed into the monitoring well by lifting equipment until the stirring head 2 approaches the surface of the sludge layer; at this time, the air compressor 4 is in a stopped state, the spring leaf 803 of the sliding groove 801 in the shell 1 is not pressed by the airflow, the sliding block 802 is withdrawn into the sliding groove 801, the friction between the sliding block 802 and the well wall is avoided, and the smooth lowering of the device is ensured.

[0030] The control system 6 starts the air compressor 4, and the high-pressure airflow enters the gas passage 101 of the shell 1 through the gas pipe 3; the airflow enters the sliding groove 801 of the side wall of the shell 1, pushes the sliding block 802 to slide outward along the direction perpendicular to the axis of the shell 1, until the sliding block 802 tightly fits the well wall, at this time the spring leaf 803 is compressed and shrinks, the shell 1 is stably fixed, avoiding dispersion of power with the rotation of the stirring head 2, at the same time, the airflow enters the airflow distribution cavity 206 inside the cylindrical main body 201 of the stirring head 2, is guided by the inner wall helical guide rib 207 to form a spiral airflow, reduces the turbulent loss, and is uniformly distributed to the plurality of main air micro holes 202 and the plurality of auxiliary air micro holes 204; the airflow is sprayed from the main air micro holes 202 of the side wall of the cylindrical main body 201, at this time, due to the 40° inclination of the main air micro holes 202 and the central axis of the cylindrical main body 201, the cylindrical main body 201 will generate a reaction force, at this time, the reaction force drives the stirring head 2 to rotate, at this time, the main air micro holes 202 distributed by the spiral line 205 make the airflow form a spiral jet trajectory, the small aperture main air micro holes 202 at the lower end generate concentrated impact force to break the below hardened sludge; the large aperture main air micro holes 202 at the upper end form a diffused airflow to stir the loose layer above, and cooperate with the rotating action to realize three-dimensional stirring; the conical head 203 cuts into the sludge layer in rotation, the auxiliary air micro holes 204 of the side wall thereof spray airflows to impact the deep hardened area, and form a "up and down linkage" breaking effect with the main airflow.

[0031] The pressure sensor 705 at the tip of the conical head 203 monitors the back pressure of the silt in real time, and the data is transmitted to the control system 6. The control system 6 controls the adjusting cylinder 704 to push the flow guide sleeve 701 to slide up or down, so that the area of the flow guide hole 702 coinciding with the main jet micro-hole 202 changes, and the impact on the silt of different hardness is carried out; at the same time, when the flow guide sleeve 701 rotates with the stirring head 2, the triangular stainless steel stirring teeth 9 uniformly distributed on the outer wall of the flow guide sleeve 701 rotate synchronously, mechanically cut into and tear the silt, and form a synergistic effect of “mechanical crushing + pneumatic stirring” with the high-pressure airflow. When the pressure sensor 705 detects that the back pressure of the silt decreases, the control system 6 drives the silt removal system 5 to pump the slurry to the ground for collection and unified treatment.

[0032] When the pressure sensor 705 continuously monitors the pressure value below 0.2 MPa for 10 minutes, the control system 6 successively closes the silt removal system 5 and the air compressor 4; at this time, the pressure in the gas conveying channel 101 disappears, the reed 803 pushes the sliding block 802 to retract into the sliding groove 801, and the fixing of the shell 1 is released. The operator slowly takes out the device from the monitoring well through hoisting equipment, cleans the surface of the device, checks the wear of the stirring teeth 9, and checks whether the main jet micro-hole 202 and the auxiliary jet micro-hole 204 are blocked; the control system 6 automatically generates a dredging report, records the operation time, the pressure change curve of the air compressor 4, the total amount of silt removal, and other data, and provides a basis for subsequent maintenance.

[0033] The above describes one specific embodiment of the present application in detail in combination with the drawings, but the present application is not limited to the above described embodiments. For those skilled in the art, various changes, modifications, replacements and variations of the embodiments can be made without departing from the principles and ideas of the present application, and should still fall within the protection scope of the present application.

Claims

1. A pneumatic stirring dredging device for small-diameter monitoring wells, characterized in that, The system includes a housing (1), a stirring head (2), an air supply pipe (3), an air compressor (4), a sludge removal system (5), and a control system (6). The stirring head (2) is rotatably connected to the lower end face of the housing (1). An air supply channel (101) and a sludge removal channel (102) are provided inside the housing (1). The two ends of the air supply pipe (3) are respectively connected to the upper ends of the air compressor (4) and the air supply channel (101). The sludge removal channel (102) is connected to the sludge removal system (5). The housing (1) has openings on its surface. There is a sludge discharge port (103). The control system (6) is electrically connected to the air compressor (4) and the sludge discharge system (5). The stirring head (2) includes a cylindrical body (201). Multiple main jet micro-holes (202) are opened on the side wall of the cylindrical body (201). The multiple main jet micro-holes (202) are all connected to the air supply channel (101). The axes of the multiple main jet micro-holes (202) are all inclined at 30°-45° to the central axis of the cylindrical body (201).

2. The pneumatic stirring dredging device for small-diameter monitoring wells according to claim 1, characterized in that: The cylindrical body (201) has a conical head (203) on its lower end surface. The conical tip of the conical head (203) points downward. The cone angle of the conical head (203) is 60°-90°. Multiple auxiliary jet micro-holes (204) are opened on the side wall of the conical head (203). The multiple auxiliary jet micro-holes (204) are all connected to the gas delivery channel (101). The axes of the multiple auxiliary jet micro-holes (204) are all inclined towards the tip of the conical head (203).

3. The pneumatic stirring dredging device for small-diameter monitoring wells according to claim 2, characterized in that: A spiral line (205) is provided on the outer wall of the cylindrical body (201), and a plurality of main jet micro-holes (202) are evenly distributed on the spiral line (205). The aperture of the plurality of main jet micro-holes (202) increases sequentially from the lower end to the upper end of the cylindrical body (201).

4. The pneumatic stirring dredging device for small-diameter monitoring wells according to claim 3, characterized in that: The cylindrical body (201) has an airflow distribution cavity (206) inside, which is connected to the air delivery channel (101). The inner wall of the airflow distribution cavity (206) is provided with a spiral guide rib (207), and the spiral guide rib (207) has the same spiral direction as the spiral line (205) of the main jet micro-hole (202).

5. A pneumatic stirring dredging device for small-diameter monitoring wells according to claim 4, characterized in that: An axially sliding guide sleeve (701) is fitted on the outer wall of the cylindrical body (201). A guide hole (702) corresponding to the main jet micro-hole (202) is opened on the side wall of the guide sleeve (701). The diameter of the guide hole (702) is larger than the diameter of the corresponding main jet micro-hole (202). An installation groove (703) is opened on the outer wall of the cylindrical body (201). An adjusting cylinder (704) is installed in the installation groove (703). The upper and lower ends of the adjusting cylinder (704) are connected to the cylindrical body (201) and the guide sleeve (701) respectively.

6. The pneumatic stirring dredging device for small-diameter monitoring wells according to claim 5, characterized in that: A pressure sensor (705) is installed at the tip of the conical head (203), and the pressure sensor (705) is electrically connected to the control system (6).

7. A pneumatic stirring dredging device for small-diameter monitoring wells according to claim 5, characterized in that: The outer wall of the guide sleeve (701) is evenly distributed with multiple stirring teeth (9), the cross-section of the multiple stirring teeth (9) is triangular, and the stirring teeth (9) are made of stainless steel.

8. The pneumatic stirring dredging device for small-diameter monitoring wells according to claim 1, characterized in that: The side wall of the housing (1) is provided with a plurality of sliding grooves (801) circumferentially. The axes of the plurality of sliding grooves (801) intersect perpendicularly with the axis of the housing (1). The plurality of sliding grooves (801) are connected to the gas supply channel (101). A slider (802) is slidably connected in the plurality of sliding grooves (801). A spring (803) is installed in the plurality of sliding grooves (801). The two ends of the spring (803) are respectively connected to the side wall of the sliding groove (801) and the slider (802).

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