CN219931081U

CN219931081U - Bottom hole reverse circulation dredging device

Info

Publication number: CN219931081U
Application number: CN202320281996.2U
Authority: CN
Inventors: 马召辉; 邹本东; 王世玉; 孔川; 宋程; 赵珅; 李高悦; 陈圆圆; 沈秀娥; 刘保献
Original assignee: Beijing Ecological Environment Monitoring Center
Current assignee: Beijing Ecological Environment Monitoring Center
Priority date: 2023-02-22
Filing date: 2023-02-22
Publication date: 2023-10-31
Anticipated expiration: 2033-02-22

Abstract

The utility model relates to the technical field of underwater dredging, and discloses a bottom hole reverse circulation dredging device which comprises a dredging pipeline, an output pipe and a plurality of return pipes; the utility model utilizes the submersible pump to pump water and sediment into the dredging pipeline, part of high-speed water flows back to the outer side of the lower end of the submersible pump from the water return pipe in the dredging process to lift the bottom mud sand, the submersible pump is suspended around the submersible pump, the submersible pump also rotates at a high speed by means of auger blades in the bottom mud pumping process, stirring and crushing are facilitated, and the air supply pipe provides high-speed air flow to the underground for stimulating the deposited mud so that the deposited mud can be smoothly discharged; and thus repeatedly circulated until the silt is discharged.

Description

Bottom hole reverse circulation dredging device

Technical Field

The utility model relates to the technical field of bottom hole dredging, in particular to a bottom hole reverse circulation dredging device.

Background

In hydrogeology investigation and groundwater investigation, the hydrogeology parameter is obtained by implementing a test well or a exploratory combined well and developing a water pumping test or a water injection test, which is one of the main working means, and in order to obtain accurate parameters, a well flushing-dredging-test process is needed after the test well is completed, wherein dredging is to clean substances such as sand, silt and the like deposited at the bottom of the well after well flushing, and the effective aquifer thickness in the well is maintained so as to obtain accurate stratum pumping and water injection capacity. The problem of bottom hole siltation is a common problem in the development and utilization of groundwater, and seriously affects normal water supply and service life of a motor-pumped well. How to better treat the in-well siltation, prolong the natural life of the motor-pumped well, fully play the role of the prior motor-pumped well, reduce the development and utilization cost of groundwater, and is an important problem generally focused by the majority of hydrogeologists.

In the prior art, the gas lift reverse circulation sludge removal method utilizes high-pressure water jet to stir and crush underwater sludge and uses a gas lift device to suck and discharge the sludge, but as the sludge removal depth increases, the stirring and crushing effect is reduced, the phenomenon that part of sediment is solidified and mixed with granular sand is caused, the concentration of the sucked and discharged sludge is low, and the sucking of sand is difficult. Therefore, it is necessary to provide a new bottom hole reverse circulation dredging device to solve the above technical problems.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide a bottom hole reverse circulation dredging device, which is free from obstruction in the discharge of mud during use, and solves the problem that the existing dredging device cannot effectively clean the mud accumulation at the bottom of the well.

The technical scheme adopted by the utility model is as follows: a bottom hole reverse circulation dredging device comprises a dredging pipeline, an output pipe and a plurality of return pipes; the lower end of the dredging pipeline is provided with a submersible pump for sucking muddy water, and the output pipe is branched and connected to the outer side of the upper end of the dredging pipeline; the water return pipe is arranged on the outer side of the dredging pipeline in a surrounding mode, the water return pipe is arranged in an inverted U shape, one end of the water return pipe is connected with the dredging pipeline in a supporting mode, and the other end of the water return pipe extends to the outer side of the lower end of the submersible pump; the dredging device is characterized in that a collecting cover is arranged at the lower end of the dredging pipeline and corresponds to the lower end of the submersible pump, auger blades are arranged in the collecting cover, a driving motor is arranged at the upper end of the dredging pipeline, and the driving motor is in transmission connection with the auger blades through a rotating shaft arranged in the dredging pipeline. The air supply pipe is characterized by further comprising an air supply pipe, the lower end of the air supply pipe extends to the inner side of the collecting cover, the upper end of the air supply pipe is connected with an air compressor assembly, and the air compressor assembly and the driving motor are in signal connection with an equipment controller.

The dredging device that this technical scheme provided mainly utilizes the immersible pump to draw in water and silt in the dredging pipeline, and most rivers are got into the output tube by the dredging pipeline and are taken out the earth's surface when sucking, and the outside of small part high-speed rivers from the wet return back to the immersible pump lower extreme, wet return spun hydroenergy impact shaft bottom silt and sand, lift up the shaft bottom silt and sand, suspend around the immersible pump, receive the output tube of immersible pump suction entering dredging pipeline, outside the well is taken out along with the rivers at last, and circulation is repeated until silt and sand is discharged, along with the silt is constantly taken away, the immersible pump constantly falls down until the shaft bottom.

In the process of pumping the bottom sediment, the auger blade is driven by the driving motor to rotate at a high speed, so that the mixing and crushing are facilitated, the mixed slurry of water, air and sediment with low density is formed, and the self-upward pumping and discharging under negative pressure are facilitated; the suction and discharge efficiency of the submersible pump is improved; meanwhile, the technical scheme also provides high-speed airflow for promoting the deposited slurry to the underground through the air supply pipe, so that the deposited slurry can be smoothly discharged; the high-pressure air catalysis also accelerates the flow rate of the slurry, and shortens the time of slurry discharge.

Further, the inside mounting bracket that is equipped with fixed auger blade of collecting cover, mounting bracket and pivot normal running fit.

Further, the lower end of the water return pipe is provided with a water spray nozzle, and the output end of the water spray nozzle extends to the inner side of the collecting cover.

Further, the inner top wall of the collecting cover is provided with a plurality of air nozzles, and the air nozzles are connected with the lower end of the air supply pipe through pipelines.

Further, a hollowed-out interception net which is arranged around the auger blade is arranged at the lower end of the collecting cover.

Further, the upper end of the dredging pipe is provided with a supporting frame which is arranged around the periphery of the dredging pipe, and the supporting frame can be outwards unfolded or rotated and folded towards one side of the dredging pipe.

Further, the dredging pipeline is sleeved with an adjusting ring, the supporting frame is hinged to the periphery of the adjusting ring, an adjusting screw arranged along the radial direction of the dredging pipeline is connected to the adjusting ring in a threaded mode, and the front end of the adjusting screw abuts against the periphery of the dredging pipeline.

The beneficial effects of the utility model are as follows: according to the utility model, water and sediment are pumped into a dredging pipeline by using the submersible pump, part of high-speed water flows back to the outer side of the lower end of the submersible pump from the water return pipe in the dredging process, water sprayed by the water return pipe can impact the mud sand at the bottom of the well, the mud sand at the bottom of the well is lifted and suspended around the submersible pump, and the mixed mud of water, sediment and air with low density is formed by stirring and crushing by means of high-speed rotation of auger blades in the process of pumping the sediment at the bottom of the well, and the air supply pipe provides high-speed air flow for underground, so that the deposited mud is promoted, and can be smoothly discharged; the high-pressure air also accelerates the flow rate of the slurry, shortens the time for discharging the slurry, and the mixture enters an output pipe of a dredging pipeline under the suction force of the submersible pump, so that the mixture is repeatedly circulated until the silt is discharged, and the submersible pump continuously falls down as the silt is continuously pumped away until the dredging work is completed at the bottom of the well; has higher practical and popularization value.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.

FIG. 1 is a cross-sectional view of a bottom hole reverse circulation dredging apparatus according to an embodiment of the present utility model.

Reference numerals: dredging pipe 100, output pipe 200, wet return 300, immersible pump 400, collection cover 500, auger blade 600, driving motor 700, air supply pipe 800, air compressor assembly 900, pivot 1000, water spray nozzle 1100, air spray nozzle 1200, mounting bracket 1300, fretwork interception net 1400, support frame 1500, adjusting ring 1600, adjusting screw 1700.

Detailed Description

Here, it is to be noted that the functions, methods, and the like related to the present utility model are merely conventional adaptive applications of the prior art. The utility model is thus an improvement over the prior art in that it essentially consists in the connection between the hardware. The description of the function and the method of the utility model is for better explaining the utility model so as to better understand the utility model.

Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.

It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs.

As shown in fig. 1, the bottom hole reverse circulation dredging device provided in this embodiment includes a dredging pipe 100, an output pipe 200 and a plurality of return pipes 300; the lower end of the dredging pipeline 100 is provided with a submersible pump 400 for sucking muddy water, and the output pipe 200 is branched and connected to the outer side of the upper end of the dredging pipeline 100; the water return pipe 300 is arranged on the outer side of the dredging pipe 100 in a surrounding manner, the water return pipe 300 is arranged in an inverted U shape, one end of the water return pipe 300 is connected with the dredging pipe 100 in a branch manner, and the other end of the water return pipe extends to the outer side of the lower end of the submersible pump 400; the dredging device is characterized in that a collecting cover 500 is arranged at the lower end of the dredging pipeline 100 and corresponds to the lower end of the submersible pump 400, an auger blade 600 is arranged in the collecting cover 500, a driving motor 700 is arranged at the upper end of the dredging pipeline 100, and the driving motor 700 is in transmission connection with the auger blade 600 through a rotating shaft 1000 arranged in the dredging pipeline 100. The air supply pipe 800 is further included, the lower end of the air supply pipe 800 extends to the inner side of the collecting cover 500, the upper end of the air supply pipe is connected with an air compressor assembly 900, and the air compressor assembly 900 and the driving motor 700 are in signal connection with an equipment controller.

As shown in fig. 1, the dredging device provided in this embodiment mainly uses a submersible pump 400 to pump water and silt into a dredging pipe 100, most of water flows from the dredging pipe 100 into an output pipe 200 to pump out the earth surface, during the flowing process, a small part of high-speed water flows back to the outer side of the lower end of the submersible pump 400 from a water return pipe 300, water sprayed by the water return pipe 300 can impact the mud sand at the bottom of the well, lift the mud sand at the bottom of the well and suspend around the submersible pump 400, the water enters the output pipe 200 of the dredging pipe 100 under the suction of the submersible pump 400, and finally is pumped out of the well along with the water flow, and the circulation is repeated until the silt is discharged, and the submersible pump 400 continuously falls down along with the silt is continuously pumped out until the dredging work at the bottom of the well is completed.

As shown in fig. 1, during the process of pumping the bottom sediment, the auger blade 600 is driven by the driving motor 700 to rotate at a high speed, which is helpful for stirring and crushing the sediment, thereby forming mixed mud of water, sediment and air with lower density, and being beneficial for self-upward pumping and discharging under negative pressure; the purposes of further stirring, crushing and solidifying the sediment, collecting the sediment and lifting the sediment into the dredging pipeline 100 are achieved, and the suction and discharge efficiency of the submersible pump 400 is improved; meanwhile, in the present embodiment, a high-speed air flow is provided to the downhole by providing the air supply pipe 800 for stimulating the deposited slurry so that the deposited slurry can be smoothly discharged; and the high-pressure air catalysis accelerates the flow rate of the slurry and shortens the time of slurry discharge. In this embodiment, the driving motor 700 and the submersible pump 400 are in the specifications and models in the prior art, and are controlled by a circuit control device, which is not described here again.

As described above, in the present embodiment, the auger blade 600 is provided in the collection housing 500 for agitating the slurry, thereby improving the pumping efficiency, and the present embodiment is provided with the mounting frame 1300 for fixing the auger blade 600 inside the collection housing 500, and the mounting frame 1300 is rotatably coupled with the rotation shaft 1000. In this way, the mounting bracket 1300 can be used to mount the auger blade 600 and realize stable rotation of the auger blade 600 by the rotation shaft 1000.

As shown in fig. 1, in this embodiment, the return pipe 300 is used for reversely circulating the water and sediment mixture pumped by the dredging pipe 100, when the water flows back to one end of the submersible pump 400 of the dredging pipe 100, the water can impact the mud sand at the bottom of the well to lift the mud sand at the bottom of the well and suspend around the submersible pump 400, and in order to improve the impact efficiency, a water spray nozzle 1100 is provided at the lower end of the return pipe 300, and the output end of the water spray nozzle 1100 extends towards the inner side of the collecting cover 500. The water spray nozzle 1100 can impact the returned water to the collecting cap 500, and improve the stirring effect by impacting the silt, thereby ensuring the pumping efficiency of the submersible pump 400. Similarly, in this embodiment, a plurality of air nozzles 1200 are further disposed on the inner top wall of the collecting cover 500, and the air nozzles are connected with the lower end of the air supply pipe 800 through a pipeline, and each air nozzle 1200 shell is used for stimulating the mud that is deposited, so that the deposited mud can be smoothly discharged, the flow velocity of the mud is accelerated, and the mud discharge time is shortened.

As shown in fig. 1, in order to avoid the large stones, etc. from being caught in the collection cover 500, the lower end of the collection cover 500 is provided with a hollow interception net 1400 arranged around the auger blade 600. The hollowed-out interception net 1400 can intercept solid matters with larger particles, and prevent the particles from blocking the dredging pipeline 100.

As shown in fig. 1, when the device is used, the dredging pipe 100 is placed in a well, and the dredging pipe 100 is gradually lowered along with the suction of mud, and for convenience in operation, a support frame 1500 arranged around the periphery of the dredging pipe 100 is arranged at the upper end of the dredging pipe 100 in this embodiment, and the support frame 1500 can be outwards unfolded or folded at one side of the dredging pipe 100. Thus, the support frame 1500 can play a role in fixing the dredging pipeline 100, and the running stability of equipment is improved; in order to facilitate the height of the lower end of the dredging pipe 100 away from the bottom of the well, in this embodiment, an adjusting ring 1600 is sleeved on the dredging pipe 100, the supporting frame 1500 is hinged to the periphery of the adjusting ring 1600, an adjusting screw 1700 radially arranged along the dredging pipe 100 is screwed on the adjusting ring 1600, and the front end of the adjusting screw 1700 abuts against the periphery of the dredging pipe 100, so that the adjusting ring 1600 can relatively slide with the dredging pipe 100 to adjust the height, and the adjusting screw 1700 can be rotated to fix the dredging pipe 100 after the adjustment is completed.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description.

Claims

1. The bottom hole reverse circulation dredging device is characterized by comprising a dredging pipeline (100), an output pipe (200) and a plurality of return pipes (300);

the lower end of the dredging pipeline (100) is provided with a submersible pump (400) for sucking muddy water, and the output pipe (200) is branched and connected to the outer side of the upper end of the dredging pipeline (100); the water return pipe (300) is arranged on the outer side of the dredging pipeline (100) in a surrounding mode, the water return pipe (300) is arranged in an inverted U shape, one end of the water return pipe (300) is connected with the dredging pipeline (100) in a supporting mode, and the other end of the water return pipe extends to the outer side of the lower end of the submersible pump (400);

the lower end of the dredging pipeline (100) is provided with a collecting cover (500) corresponding to the lower end of the submersible pump (400), an auger blade (600) is arranged in the collecting cover (500), the upper end of the dredging pipeline (100) is provided with a driving motor (700), and the driving motor (700) is in transmission connection with the auger blade (600) through a rotating shaft (1000) arranged in the dredging pipeline (100);

the air supply device comprises a collecting cover (500), and is characterized by further comprising an air supply pipe (800), wherein the lower end of the air supply pipe (800) extends to the inner side of the collecting cover (500), the upper end of the air supply pipe is connected with an air compressor assembly (900), and the air compressor assembly (900) and a driving motor (700) are connected with an equipment controller in a signal mode.

2. The bottom hole reverse circulation dredging device according to claim 1, wherein a mounting frame (1300) for fixing the auger blade (600) is arranged on the inner side of the collecting cover (500), and the mounting frame (1300) is in running fit with the rotating shaft (1000).

3. The bottom hole reverse circulation dredging device according to claim 1, wherein a water spray nozzle (1100) is arranged at the lower end of the return pipe (300), and an output end of the water spray nozzle (1100) extends towards the inner side of the collecting cover (500).

4. The bottom hole reverse circulation dredging device according to claim 1, wherein a plurality of air nozzles (1200) are arranged on the inner top wall of the collecting cover (500), and the air nozzles (1200) are connected with the lower end of the air supply pipe (800) through pipelines.

5. The bottom hole reverse circulation dredging device according to claim 1, wherein the lower end of the collecting cover (500) is provided with a hollowed-out interception net (1400) arranged around the auger blade (600).

6. The bottom hole reverse circulation dredging device according to claim 1, wherein a supporting frame (1500) arranged around the periphery of the dredging pipe (100) is arranged at the upper end of the dredging pipe (100), and the supporting frame (1500) can be unfolded outwards or folded in a rotating way towards one side of the dredging pipe (100).

7. The bottom hole reverse circulation dredging device according to claim 6, wherein an adjusting ring (1600) is sleeved on the dredging pipeline (100), a supporting frame (1500) is hinged to the periphery of the adjusting ring (1600), an adjusting screw (1700) arranged along the radial direction of the dredging pipeline (100) is connected to the adjusting ring (1600) in a screwed mode, and the front end of the adjusting screw (1700) abuts against the periphery of the dredging pipeline (100).