CN115824720B - Underground water sample taking device and method for engineering geological investigation - Google Patents
Underground water sample taking device and method for engineering geological investigation Download PDFInfo
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- CN115824720B CN115824720B CN202310127877.6A CN202310127877A CN115824720B CN 115824720 B CN115824720 B CN 115824720B CN 202310127877 A CN202310127877 A CN 202310127877A CN 115824720 B CN115824720 B CN 115824720B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A90/30—Assessment of water resources
Abstract
The invention relates to the technical field of underground water sampling, in particular to an underground water sample sampling device and an underground water sample sampling method for engineering geological investigation, comprising a drill rod and a drill bit at the bottom end of the drill rod, wherein an opening is formed in the drill rod, an opening cover is rotatably connected to the opening through a hinge, the opening cover can rotate inwards or outwards by taking the top end as an axis, the opening cover can be embedded into the inner side of the drill rod when rotating inwards, a cavity can be formed between the opening cover and underground soil when rotating outwards, a telescopic second filter screen is fixedly arranged between the outer side of the opening cover and the opening, an outer rod capable of moving up and down is rotatably arranged on the inner side of the drill rod, an inner rod is slidably connected to the inner side of the outer rod, a first filter screen is arranged on the outer rod, a plurality of water inlets are formed in the inner rod, the projection angles of the water inlets at the bottom end are different, the positions of the first filter screen correspond to the opening, and the water inlets can coincide with the corresponding first filter screens through rotation.
Description
Technical Field
The invention relates to the technical field of underground water sampling, in particular to an underground water sample sampling device and method for engineering geological investigation.
Background
The adoption of an underground water sample for testing to evaluate the corrosiveness of water to a concrete structure is an important content of engineering geological investigation, and the testing items comprise pH value and Mg 2+ 、Cl - 、SO 4 2- 、HCO 3 - Aggressive CO 2 、NH 4 + 、OH - And the like, and the testing method is mainly a titration method.
One of the existing underground water sample collecting methods is to fix mineral water bottle at the end of bamboo pole (or branch) and extend into drill hole, and send to laboratory test after filling. The drawbacks of this approach are mainly manifested as: (1) The collected underground water sample contains a large amount of soil particles (clay soil, silt soil, sand soil), grease, organic matters and the like, and has low purity, so that the testing precision of each ion and molecule is seriously influenced; (2) The operation is inconvenient, even water samples are difficult to take when the groundwater level is deep, and the specific depth of the water samples taken cannot be measured. The corrosiveness of the underground water on the investigation site to the concrete structure is evaluated according to the water quality test result, and the defects greatly reduce the accuracy and even cause erroneous judgment.
In order to overcome the defects of the method, the existing method for taking water after stretching into the drill hole through the water suction pipe is provided with a filter screen at the water taking end of the water suction pipe for filtering substances such as sediment, but because the inner wall soil of the drill hole is loose, dynamic and static brought by the downward exploration of the water suction pipe and the pressure difference generated near the water pumping port during water pumping easily cause the collapse of the inner wall soil of the drill hole, the filter screen is easy to be blocked after the collapse of the inner wall soil of the drill hole, and if the water pumping force is increased, sediment can still be pumped out, so that the problem of difficult water taking is caused.
Thus, an underground water sample collection device for engineering geological investigation is proposed in view of the above problems.
Disclosure of Invention
The invention aims to provide an underground water sample collecting device for engineering geological exploration, which is used for solving the problems that the soil on the inner wall of a drill hole is loose, dynamic and static brought by downward exploration of a water pumping pipe and the pressure difference generated near a water pumping port easily cause collapse of the soil on the inner wall of the drill hole during water pumping, a filter screen arranged after the collapse of the soil on the inner wall of the drill hole is easily blocked, and sediment is still pumped out if the water pumping force is increased, so that water is difficult to take.
In order to achieve the above purpose, the present invention provides the following technical solutions: the underground water sample collecting device comprises a drill rod and a drill bit at the bottom end of the drill rod, wherein an opening is formed in the drill rod, an opening cover is connected to the opening through a hinge in a rotating mode, the opening cover can rotate inwards or outwards by taking the top end as an axis, the opening cover can be embedded into the inner side of the drill rod when rotating inwards, a cavity can be formed between the opening cover and underground soil when rotating outwards, and a telescopic second filter screen is fixedly arranged between the outer side of the opening cover and the opening;
the inner side of the drill rod is rotatably provided with an outer rod capable of moving up and down, the inner side of the outer rod is slidably connected with an inner rod, the outer rod is provided with a first filter screen, the inner rod is provided with a plurality of water inlets, the projection angles of the water inlets at the bottom end are different, the positions of the first filter screens correspond to the openings, and the water inlets can be overlapped with the corresponding first filter screens through rotation;
the top end of the inner rod is communicated with a water intake pipe.
When the underground water sampling device is used, the drill rod is inserted into the ground, the insertion depth is deeper than the underground water line, the relatively pure underground water can be taken out during sampling, the interference of sediment on an underground water sample is reduced to the greatest extent, and the water intake is not easy to be blocked;
when sampling is carried out, the outer rod can slowly move up and down on the inner side of the drill rod, wherein the opening cover can be mostly embedded into the inner side of the drill rod, so that the drill rod can conveniently descend in geology, after reaching a required depth, the first rotating disc is rotated, the first rotating disc drives the drill rod to rotate, the outer rod is kept stationary when the drill rod rotates, the outer rod can be fixed through an external tool, the drill rod and the outer rod relatively move, the outer rod can move downwards under the action of threads, the opening cover can be driven to move outwards through the connecting rod along with the downwards movement of the outer rod, and soil at the opening cover can be continuously extruded and tamped under the rotation action of the drill rod, so that a cavity with narrow upper part and wide lower part is formed between the opening cover and the soil; the water is taken from the hole, so that substances such as sediment can be greatly prevented from falling to the water taking position of the outer rod, the effect of enhancing water quality is achieved, the substances such as sediment are prevented from blocking the filter screen at the water taking position, the second filter screen plays a role in primary filtration, and the first filter screen plays a role in secondary filtration;
the water intake is arranged at one side of the opening of the drill rod, and the opening cover can play a role in enclosing and shielding the water intake, so that substances such as sediment are further prevented from falling to the water intake of the outer rod, the water quality is enhanced, and the filter screen at the water intake is prevented from being blocked by the substances such as sediment;
when water is taken, the invention can realize the sampling of groundwater with different depths, a plurality of corresponding openings and a first filter screen are respectively arranged on a drill rod and an outer rod, when the invention is used, an inner rod is rotated to align a water inlet on the inner rod with the first filter screen with the required water taking height, negative pressure is applied to a water intake pipe, the groundwater can overflow through a second filter screen at an opening cover, an opening of the drill rod, the first filter screen, the water inlet, the inner rod and the water intake pipe to realize the sampling, in order to prevent residues remained among the pipelines of the sample during the previous sampling, the extracted front section water can be emptied during the water pumping, and the later section water is detected;
the projection angle of a plurality of water inlets in the bottom is different, and when this kind of setting can make one of them water inlet and first filter screen coincide, other water inlets can stagger with first filter screen, and when getting water promptly, only one water inlet intakes.
As an alternative to the underground water sampling device for engineering geological survey of the present invention, wherein: the inside fixedly connected with connection pad of drilling rod, the inboard of connection pad and the outside sliding connection of outer pole, be provided with the connecting rod between outer pole and the opening lid, the both ends of connecting rod are connected with outer pole and opening lid rotation respectively through the hinge.
Under the arrangement, the inner side of the drill rod can be sealed through the connecting disc, and the outer rod can be limited through the connecting disc, so that the stability of the outer rod in up-and-down movement is improved;
as an alternative to the underground water sampling device for engineering geological survey of the present invention, wherein: the outer screw thread is fixedly arranged on the outer side of the upper end of the outer rod, a first rotary table is fixedly connected to the top end of the drill rod, the inner side of the first rotary table is in spiral connection with the outer side of the screw thread, a second rotary table is fixedly connected to the top end of the outer rod, and the inner side of the second rotary table is in sliding connection with the inner rod.
In the above arrangement, the screw thread arrangement enables the first turntable and the outer rod to move up and down relative to each other, and the second turntable is used for operating the outer rod to remain stationary;
as an alternative to the underground water sampling device for engineering geological survey of the present invention, wherein: the inner side of the bottom end of the drill rod is fixedly provided with a limiting column, and the inner side of the limiting column is in sliding connection with the outer side of the outer rod.
Under the arrangement, the outer rod is arranged on the limiting column to limit, so that the outer rod can stably move inside the drill rod;
as an alternative to the underground water sampling device for engineering geological survey of the present invention, wherein: the length of the opening cover is slightly higher than that of the opening, and when the drill rod rotates, a groove is formed at the bottom end of the cavity.
Under the arrangement, the length of the opening cover is slightly higher than that of the opening, and under the arrangement, in the process of forming the cavity, the bottom end of the cavity forms a groove, and the groove can provide a storage space for scattered sediment, so that the sediment is further prevented from approaching the opening on the drill rod;
as an alternative to the underground water sampling device for engineering geological survey of the present invention, wherein: the drill rod is characterized in that a supporting plate is fixedly connected to the outer side of the top end of the drill rod, a supporting column is fixedly connected to the supporting plate, a motor is fixedly connected to the supporting column, a gear is fixedly connected to the output end of the motor, a toothed ring is fixedly arranged on the upper side of the first rotary table, and the toothed ring is meshed with the gear.
As an alternative to the underground water sampling device for engineering geological survey of the present invention, wherein: the limiting groove is formed in the second rotary table, a limiting rod is fixedly arranged on the motor, and one end of the limiting rod is arranged on the inner side of the limiting groove in a sliding connection mode.
Under the arrangement, the supporting plate plays a role in supporting and connecting, when the electric drill is in operation, the motor is started to drive the gear to rotate, the gear rotates to drive the toothed ring to rotate, the toothed ring rotates to enable the first rotating disc to rotate along with the toothed ring, the first rotating disc rotates to enable the drill rod to rotate, meanwhile, the outer rod can move upwards or downwards along with the rotation of the drill rod, one end of the limiting rod is arranged on the inner side of the limiting groove and is in sliding connection, the limiting rod plays a role in limiting the second rotating disc, the second rotating disc is prevented from rotating along with the rotation of the first rotating disc, the outer rod moves downwards, and the opening cover at the opening part is opened;
as an alternative to the underground water sampling device for engineering geological survey of the present invention, wherein: the drill rod is symmetrically provided with sliding grooves, sliding rods are connected inside the sliding grooves in a sliding mode, an outlet is formed in one end, facing the outer side of the drill rod, of each sliding rod, and a cone portion is arranged at one end, facing the outer side of the drill rod, of each sliding rod.
As an alternative to the underground water sampling device for engineering geological survey of the present invention, wherein: the sliding rod is provided with a tension spring, and two ends of the tension spring are fixedly connected with the sliding groove and the sliding rod respectively.
Under the arrangement, sediment can be accumulated on the inner side of the bottom end of the drill rod after a long time, because groundwater can be sampled for a plurality of times for a long time, the invention can discharge sediment entering the inner side of the drill rod, keep the inner side of the drill rod clean, prevent sediment from accumulating on the inner side of the drill rod and influence the water intake for a long time; when sediment is discharged, one of the water inlets is communicated with the first filter screen, the inner side of the drill rod is pressurized through the water intake pipe, the slide rod in the slide groove can gradually move towards the outer side of the drill rod along with the increase of the pressure of the inner side of the drill rod, after the slide rod is discharged from the outlet on the slide rod, the inner side of the bottom end of the drill rod, the inner side of the slide rod and the outer side of the bottom end of the drill rod are communicated, and sediment at the inner side of the bottom end of the drill rod can be discharged through the slide rod and the outlet under the action of high pressure, so that cleaning is realized.
The application method of the underground water sample collecting device for engineering geological investigation comprises the following steps of;
step a; the drill rod is inserted into the ground, the insertion depth is deeper than the underground waterline, and the water intake is arranged at one side of the opening of the drill rod, so that the opening cover can play a role in enclosing and shielding the water intake, further prevent substances such as sediment from falling to the water intake of the outer rod, play a role in enhancing water quality and prevent the substances such as sediment from blocking the filter screen at the water intake;
step b; the first rotary table is rotated, the first rotary table drives the drill rod to rotate, the drill rod keeps the static state of the outer rod when rotating, the drill rod and the outer rod move relatively, soil at the opening cover can be continuously extruded and tamped, and a cavity with narrow upper part and wide lower part is formed between the opening cover and the soil;
step c; the inner rod is rotated to enable a water inlet on the inner rod to be aligned with a first filter screen at the height required for taking water, negative pressure is applied to the water taking pipe, and groundwater can emerge from the second filter screen at the opening cover, the opening of the drill rod, the first filter screen, the water inlet, the inner rod and the water taking pipe to realize sampling;
step d; the inner side of the drill rod is pressurized through the water intake pipe, and sediment at the inner side of the bottom end of the drill rod can be discharged through the sliding rod and the outlet under the action of high pressure, so that cleaning is realized.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the underground water sample taking device for engineering geological investigation, when the underground water sample taking device is used, the drill rod is inserted into the ground, the insertion depth is deeper than the underground water line, relatively pure underground water can be taken out during sampling, the interference of sediment on an underground water sample is reduced to the greatest extent, and the water intake is not easy to be blocked; when sampling is carried out, the outer rod can slowly move up and down on the inner side of the drill rod, wherein the opening cover can be mostly embedded into the inner side of the drill rod, so that the drill rod can conveniently descend in geology, after reaching a required depth, the first rotating disc is rotated, the first rotating disc drives the drill rod to rotate, the outer rod is kept stationary when the drill rod rotates, the outer rod can be fixed through an external tool, the drill rod and the outer rod relatively move, the outer rod can move downwards under the action of threads, the opening cover can be driven to move outwards through the connecting rod along with the downwards movement of the outer rod, and soil at the opening cover can be continuously extruded and tamped under the rotation action of the drill rod, so that a cavity with narrow upper part and wide lower part is formed between the opening cover and the soil; the water is taken from the hole, so that substances such as sediment can be greatly prevented from falling to the water taking position of the outer rod, the effect of enhancing water quality is achieved, the substances such as sediment are prevented from blocking the filter screen at the water taking position, the second filter screen plays a role in primary filtration, and the first filter screen plays a role in secondary filtration;
2. according to the underground water sample collecting device for engineering geological investigation, the water intake is arranged on one side of the opening of the drill rod, and the opening cover can play a role in enclosing and shielding the water intake, so that substances such as sediment are further prevented from falling to the water intake of the outer rod, the water quality is enhanced, and the filter screen at the water intake is prevented from being blocked by the substances such as sediment;
3. according to the underground water sample taking device for engineering geological investigation, when water is taken, the underground water samples with different depths can be sampled, the drill rod and the outer rod are respectively provided with the corresponding openings and the first filter screen, when the underground water sample taking device is used, the inner rod is rotated to enable the water inlet on the inner rod to be aligned with the first filter screen with the required water taking height, negative pressure is applied to the water intake pipe, the underground water can be sampled through the second filter screen at the opening cover, the opening of the drill rod, the first filter screen, the water inlet, the inner rod and the water intake pipe, and in order to prevent residues remained among the pipelines of the samples during previous sampling, and when the water is pumped, the extracted front section water can be emptied, and the later section water can be detected;
4. this an underground water sample taking device for engineering geology reconnaissance, a plurality of the projection angle of water inlet in the bottom is different, and when this kind of setting can make one of them water inlet and first filter screen coincide, other water inlets can stagger with first filter screen, and when getting water promptly, only one water inlet intakes.
5. According to the underground water sample collecting device for engineering geological investigation, the length of the opening cover is slightly higher than that of the opening, under the arrangement, in the process of forming a cavity, the bottom end of the cavity forms a groove, and the groove can provide a storage space for scattered sediment, so that the sediment is further prevented from approaching the opening on the drill rod;
6. according to the underground water sample taking device for engineering geological investigation, the supporting plate plays a role in supporting and connecting, when the device works, the motor is started to drive the gear to rotate, the gear rotates to drive the toothed ring to rotate, the toothed ring rotates to enable the first rotating disc to rotate along with the toothed ring, the drill rod is enabled to rotate by rotating the first rotating disc, meanwhile, the outer rod can move upwards or downwards along with the rotation of the drill rod, one end of the limiting rod is arranged on the inner side of the limiting groove and is in sliding connection, the limiting rod plays a role in limiting the second rotating disc, the second rotating disc is prevented from rotating along with the rotation of the first rotating disc, the outer rod moves downwards, and the opening cover at the opening part is opened;
7. according to the underground water sample collecting device for engineering geological investigation, sediment can be accumulated on the inner side of the bottom end of the drill rod after a long time, and because the underground water possibly needs to be sampled for a plurality of times for a long time, the sediment entering the inner side of the drill rod can be discharged, the inner side of the drill rod is kept clean, sediment is prevented from accumulating on the inner side of the drill rod, and the influence on a water intake is generated in the long time in the past; when sediment is discharged, one of the water inlets is communicated with the first filter screen, the inner side of the drill rod is pressurized through the water intake pipe, the slide rod in the slide groove can gradually move towards the outer side of the drill rod along with the increase of the pressure of the inner side of the drill rod, after the slide rod is discharged from the outlet on the slide rod, the inner side of the bottom end of the drill rod, the inner side of the slide rod and the outer side of the bottom end of the drill rod are communicated, and sediment at the inner side of the bottom end of the drill rod can be discharged through the slide rod and the outlet under the action of high pressure, so that cleaning is realized.
Drawings
FIG. 1 is a schematic view of an overall mounting structure of the present invention;
FIG. 2 is a schematic view showing the whole structure of the opening cover
FIG. 3 is a schematic elevational cross-sectional overall structure of the present invention;
FIG. 4 is a schematic elevational cross-sectional overall structure of the opening cover of the present invention when opened;
FIG. 5 is a schematic view of the structure of the present invention with the underground middle opening cover open;
FIG. 6 is a schematic view of a further mounting structure of the opening cover of the present invention;
FIG. 7 is a schematic view of the structure of FIG. 4A according to the present invention;
FIG. 8 is a schematic view of a further mounting structure of FIG. 1 in accordance with the present invention;
FIG. 9 is a schematic view of the mounting structure of the joint between the inner rod and the outer rod according to the present invention;
FIG. 10 is a schematic view of the structure of FIG. 8B according to the present invention;
FIG. 11 is a schematic view of a further mounting structure of FIG. 3 in accordance with the present invention;
FIG. 12 is a schematic view of the structure of FIG. 11 at C in accordance with the present invention;
FIG. 13 is a schematic view of the installation structure of the sliding rod in the invention.
In the figure: 1. a drill rod; 2. a drill bit; 3. a connecting disc; 4. an outer rod; 5. a first filter screen; 6. a connecting rod; 7. an opening cover; 8. a second filter screen; 9. a first turntable; 10. a second turntable; 11. a thread; 12. an inner rod; 13. a water intake pipe; 14. a cavity; 15. a groove; 16. a support plate; 17. a chute; 18. a motor; 19. a support column; 20. a water inlet; 21. a gear; 22. a toothed ring; 23. a limit rod; 24. a limit groove; 25. a limit column; 26. a slide bar; 27. a tension spring; 28. an outlet; 29. a cone.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1-5, the present invention provides a technical solution: an underground water sample collecting device for engineering geological investigation comprises a drill rod 1 and a drill bit 2 at the bottom end of the drill rod 1, wherein an opening is formed in the drill rod 1, an opening cover 7 is connected to the opening through a hinge in a rotating mode, the opening cover 7 can rotate inwards or outwards by taking the top end as an axis, the opening cover 7 can be embedded into the inner side of the drill rod 1 when rotating inwards, a cavity 14 can be formed between the opening cover 7 and underground soil when rotating outwards, and a telescopic second filter screen 8 is fixedly arranged between the outer side of the opening cover 7 and the opening;
the top end of the inner rod 12 is connected to a water intake pipe 13.
When the underground water sampling device is used, the drill rod 1 is inserted into the ground, the insertion depth is deeper than the underground water line, the relatively pure underground water can be taken out during sampling, the interference of sediment on an underground water sample is reduced to the greatest extent, and the water intake is not easy to be blocked;
during sampling, the outer rod 4 can slowly move up and down on the inner side of the drill rod 1, wherein the opening cover 7 can be mostly embedded into the inner side of the drill rod 1, so that the drill rod 1 can conveniently descend in geology, after reaching a required depth, the first rotating disc 9 is rotated, the first rotating disc 9 drives the drill rod 1 to rotate, the outer rod 4 is kept in a static state when the drill rod 1 rotates, the outer rod 4 can be fixed through an external tool, the drill rod 1 and the outer rod 4 can relatively move, the outer rod 4 can move downwards under the action of the threads 11, the opening cover 7 can be driven to move outwards through the connecting rod 6 along with the downward movement of the outer rod 4, and soil at the opening cover 7 can be continuously extruded and compacted under the rotation action of the drill rod 1, so that a cavity 14 with a narrow upper part and a wide lower part is formed between the opening cover 7 and the soil; taking water at the hole 14 can greatly prevent substances such as sediment from falling to the water taking position of the outer rod 4, play a role in enhancing water quality, and prevent the substances such as sediment from blocking the filter screen at the water taking position, wherein the second filter screen 8 plays a role in primary filtration, and the first filter screen 5 plays a role in secondary filtration;
the water intake is arranged on one side of the opening of the drill rod 1, and the arrangement can enable the opening cover 7 to play a role in enclosing and shielding the water intake, further prevent substances such as sediment from falling to the water intake of the outer rod 4, play a role in enhancing water quality and prevent the substances such as sediment from blocking the filter screen at the water intake;
specifically, the inner side of the drill rod 1 is fixedly connected with a connecting disc 3, the inner side of the connecting disc 3 is slidably connected with the outer side of the outer rod 4, a connecting rod 6 is arranged between the outer rod 4 and the opening cover 7, and two ends of the connecting rod 6 are respectively rotatably connected with the outer rod 4 and the opening cover 7 through hinges.
Under the arrangement, the inner side of the drill rod 1 can be sealed through the connecting disc 3, and the outer rod 4 can be limited through the connecting disc 3, so that the stability of the outer rod 4 in the up-and-down movement is improved;
specifically, a thread 11 is fixedly disposed on the outer side of the upper end of the outer rod 4, a first rotary disc 9 is fixedly connected to the top end of the drill rod 1, the inner side of the first rotary disc 9 is spirally connected to the outer side of the thread 11, a second rotary disc 10 is fixedly connected to the top end of the outer rod 4, and the inner side of the second rotary disc 10 is slidably connected to an inner rod 12.
In the above arrangement, the screw thread 11 is arranged to enable the first rotary disc 9 and the outer rod 4 to move up and down relative to each other, and the second rotary disc 10 is used to operate the outer rod 4 to remain stationary;
specifically, a limiting column 25 is fixedly arranged at the inner side of the bottom end of the drill rod 1, and the inner side of the limiting column 25 is slidably connected with the outer side of the outer rod 4.
In the above arrangement, the outer rod 4 of the limiting post 25 of the present invention is limited, so that the outer rod 4 can perform stable movement inside the drill rod 1.
Example 2
In this embodiment, as a further improvement of embodiment 1, referring to fig. 1-10, an outer rod 4 capable of moving up and down is rotatably disposed on the inner side of the drill rod 1, an inner rod 12 is slidably connected to the inner side of the outer rod 4, a first filter screen 5 is disposed on the outer rod 4, a plurality of water inlets 20 are disposed on the inner rod 12, projection angles of the plurality of water inlets 20 at bottom ends are different, positions of the first filter screen 5 correspond to the openings, and the water inlets 20 can be overlapped with the corresponding first filter screen 5 through rotation;
when water is taken, the invention can realize the sampling of groundwater with different depths, a plurality of corresponding openings and a first filter screen 5 are respectively arranged on a drill rod 1 and an outer rod 4, when the invention is used, an inner rod 12 is rotated to align a water inlet 20 on the inner rod 12 with the first filter screen 5 with the required water taking height, negative pressure is applied to a water taking pipe 13, the groundwater can emerge from the second filter screen 8 at an opening cover 7, the opening of the drill rod 1, the first filter screen 5, the water inlet 20, the inner rod and the water taking pipe 13 to realize the sampling, in order to prevent residues remained among the pipelines of the samples during the previous sampling, and the extracted front section water can be emptied during the water pumping, and the later section water can be detected;
the projection angles of the water inlets 20 at the bottom end are different, and when one water inlet 20 is overlapped with the first filter screen 5, the rest water inlets 20 are staggered with the first filter screen 5, namely, only one water inlet is used for water intake when water is taken.
Example 3
This embodiment is a further modification of embodiment 1, referring to fig. 1-10, the length of the opening cover 7 is slightly longer than the length of the opening, and the bottom end of the cavity 14 forms a groove 15 when the drill rod 1 rotates.
In the above arrangement, the length of the opening cover 7 can be slightly higher than that of the opening, in the arrangement, in the process of forming the cavity 14, the bottom end of the cavity 14 forms the groove 15, and the occurrence of the groove 15 can provide a storage space for some scattered sediment, so that the sediment is further prevented from approaching the opening on the drill rod 1.
Example 4
In this embodiment, as a further improvement of embodiment 1, referring to fig. 1-10, a support plate 16 is fixedly connected to the outer side of the top end of the drill rod 1, a support column 19 is fixedly connected to the support plate 16, a motor 18 is fixedly connected to the support column 19, a gear 21 is fixedly connected to the output end of the motor 18, a toothed ring 22 is fixedly arranged on the upper side of the first turntable 9, and the toothed ring 22 is meshed with the gear 21.
Specifically, the second turntable 10 is provided with a limit groove 24, the motor 18 is fixedly provided with a limit rod 23, and one end of the limit rod 23 is slidably connected with the inner side of the limit groove 24.
Under the above arrangement, the supporting plate 16 plays a role in supporting and connecting, when the rotary drill is in operation, the motor 18 is started to drive the gear 21 to rotate, the gear 21 rotates to drive the toothed ring 22 to rotate, the toothed ring 22 rotates to enable the first rotary disc 9 to rotate along with the toothed ring, the first rotary disc 9 rotates to enable the drill rod 1 to rotate, meanwhile, the outer rod 14 can move upwards or downwards along with the rotation of the drill rod 1, one end of the limiting rod 23 is arranged on the inner side of the limiting groove 24 in a sliding connection mode, the limiting rod 23 plays a role in limiting the second rotary disc 10, the second rotary disc 10 is prevented from rotating along with the rotation of the first rotary disc 9, the outer rod 4 moves downwards, and the opening cover 7 at the opening is opened.
Example 5
In this embodiment, referring to fig. 1-13, the drill rod 1 is symmetrically provided with sliding grooves 17, a sliding rod 26 is slidably connected in the sliding grooves 17, an outlet 28 is formed at an end of the sliding rod 26 facing the outside of the drill rod 1, and a cone 29 is formed at an end of the sliding rod 26 facing the outside of the drill rod 1.
Specifically, a tension spring 27 is disposed on the slide bar 26, and two ends of the tension spring 27 are fixedly connected with the slide groove 17 and the slide bar 26 respectively.
Under the arrangement, sediment can be accumulated on the inner side of the bottom end of the drill rod 1 after a long time, because the underground water possibly needs to be sampled for a plurality of times for a long time, the invention can discharge the sediment entering the inner side of the drill rod 1, keep the inner side of the drill rod 1 clean, prevent the sediment from accumulating on the inner side of the drill rod 1 and influence the water intake in the past for a long time; when sediment is discharged, one of the water inlets 20 is communicated with the first filter screen 5, the inner side of the drill rod 1 is pressurized through the water intake pipe 13, along with the increase of the pressure of the inner side of the drill rod 1, the slide rod 26 in the slide groove 17 gradually moves towards the outer side of the drill rod 1, after the outlet 28 on the slide rod 26 is discharged out of the slide groove 17, the inner side of the bottom end of the drill rod 1, the inner side of the slide rod 26 and the outer side of the bottom end of the drill rod 1 are communicated, and sediment at the inner side of the bottom end of the drill rod 1 is discharged through the slide rod 26 and the outlet 28 under the action of high pressure, so that cleaning is realized.
The invention also discloses a use method of the underground water sample taking device for engineering geological investigation, which comprises the following steps of;
step a; the drill rod 1 is inserted into the ground, the insertion depth is deeper than the underground waterline, and the water intake is arranged at one side of the opening of the drill rod 1, so that the opening cover 7 can play a role in enclosing and shielding the water intake, further prevent substances such as sediment from falling to the water intake of the outer rod 4, play a role in enhancing water quality, and prevent substances such as sediment from blocking the filter screen at the water intake;
step b; the first rotating disc 9 is rotated, the first rotating disc 9 drives the drill rod 1 to rotate, the drill rod 1 keeps the static state of the outer rod 4 when rotating, the drill rod 1 and the outer rod 4 generate relative motion, soil at the opening cover 7 can be continuously extruded and tamped, and a cavity 14 with a narrow upper part and a wide lower part is formed between the opening cover 7 and the soil;
step c; the inner rod 12 is rotated, so that the water inlet 20 on the inner rod 12 is aligned with the first filter screen 5 with the required water taking height, negative pressure is applied to the water taking pipe 13, and underground water can emerge from the second filter screen 8 at the opening cover 7, the opening of the drill rod 1, the first filter screen 5, the water inlet 20, the inner rod and the water taking pipe 13 to realize sampling;
step d; the inner side of the drill rod 1 is pressurized through the water intake pipe 13, and sediment at the inner side of the bottom end of the drill rod 1 is discharged through the slide rod 26 and the outlet 28 under the action of high pressure, so that cleaning is realized.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. An underground water sample taking device for engineering geological investigation, includes drilling rod (1) and drill bit (2) of drilling rod (1) bottom, its characterized in that: an opening is formed in the drill rod (1), an opening cover (7) is connected to the opening through a hinge in a rotating mode, the opening cover (7) can rotate inwards or outwards by taking the top end as an axis, the opening cover (7) can be embedded into the inner side of the drill rod (1) when rotating inwards, a cavity (14) can be formed between the opening cover (7) outwards and the underground soil when rotating, and a telescopic second filter screen (8) is fixedly arranged between the outer side of the opening cover (7) and the opening;
the inside rotation of drilling rod (1) is provided with outer pole (4) that can reciprocate, the inboard sliding connection of outer pole (4) has interior pole (12), be provided with first filter screen (5) on outer pole (4), a plurality of water inlet (20) have been seted up on interior pole (12), a plurality of water inlet (20) are different in the projection angle of bottom, the position and the opening of first filter screen (5) are corresponding, water inlet (20) can coincide with corresponding first filter screen (5) through the rotation, the top intercommunication of interior pole (12) has intake pipe (13), the inboard fixedly connected with connection pad (3) of drilling rod (1), the outside sliding connection of the inboard of connection pad (3) and outer pole (4), be provided with connecting rod (6) between outer pole (4) and the opening lid (7), the both ends of connecting rod (6) are passed through the hinge and are rotated with outer pole (4) and opening lid (7) respectively, the upper end outside of outer pole (4) is fixedly provided with intake pipe (13), the top of first screw thread (9) are connected with outside screw thread (9) of first carousel (9), the inner side of the second rotary table (10) is in sliding connection with the inner rod (12), a limit column (25) is fixedly arranged on the inner side of the bottom end of the drill rod (1), the inner side of the limit column (25) is in sliding connection with the outer side of the outer rod (4), the length of the opening cover (7) is slightly higher than that of the opening, and when the drill rod (1) rotates, a groove (15) is formed at the bottom end of the cavity (14);
the outer side of the top end of the drill rod (1) is fixedly connected with a supporting plate (16), the supporting plate (16) is fixedly connected with a supporting column (19), the supporting column (19) is fixedly connected with a motor (18), the output end of the motor (18) is fixedly connected with a gear (21), the gear ring (22) is fixedly arranged on the upper side of the first rotating disc (9), the gear ring (22) is meshed with the gear (21), a limiting groove (24) is formed in the second rotating disc (10), a limiting rod (23) is fixedly arranged on the motor (18), and one end of the limiting rod (23) is arranged on the inner side of the limiting groove (24) in a sliding connection mode.
2. An underground water sampling device for engineering geological survey according to claim 1, wherein: the drill rod (1) is symmetrically provided with sliding grooves (17), sliding rods (26) are connected inside the sliding grooves (17) in a sliding mode, an outlet (28) is formed in one end, facing the outer side of the drill rod (1), of each sliding rod (26), and a cone portion (29) is arranged at one end, facing the outer side of the drill rod (1), of each sliding rod (26).
3. An underground water sampling device for engineering geological survey according to claim 2, wherein: the sliding rod (26) is provided with a tension spring (27), and two ends of the tension spring (27) are fixedly connected with the sliding groove (17) and the sliding rod (26) respectively.
4. A method of using an underground water sample collection device for engineering geological exploration as claimed in claim 3, wherein the steps are;
step a; the drill rod (1) is inserted into the ground, the insertion depth is deeper than the underground waterline, and the water intake is arranged at one side of an opening of the drill rod (1);
step b; rotating the first rotating disc (9), wherein the first rotating disc (9) drives the drill rod (1) to rotate, the drill rod (1) keeps the outer rod (4) in a static state when rotating, the drill rod (1) and the outer rod (4) generate relative motion, and soil at the opening cover (7) can be continuously extruded and tamped, so that a cavity (14) with a narrow upper part and a wide lower part is formed between the opening cover (7) and the soil;
step c; the inner rod (12) is rotated, a water inlet (20) on the inner rod (12) is aligned with a first filter screen (5) with the required water taking height, negative pressure is applied to the water taking pipe (13), and groundwater can emerge through a second filter screen (8) at the opening cover (7), the opening of the drill rod (1), the first filter screen (5), the water inlet (20), the inner rod and the water taking pipe (13) to realize sampling;
step d; the inner side of the drill rod (1) is pressurized through the water intake pipe (13), and sediment at the inner side of the bottom end of the drill rod (1) can be discharged through the slide rod (26) and the outlet (28) under the action of high pressure, so that cleaning is realized.
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