CN111537283B - Hydrogeology reconnaissance is with automatic sampling device - Google Patents
Hydrogeology reconnaissance is with automatic sampling device Download PDFInfo
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- CN111537283B CN111537283B CN202010477751.8A CN202010477751A CN111537283B CN 111537283 B CN111537283 B CN 111537283B CN 202010477751 A CN202010477751 A CN 202010477751A CN 111537283 B CN111537283 B CN 111537283B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
- G01N2001/1418—Depression, aspiration
- G01N2001/1427—Positive displacement, piston, peristaltic
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Abstract
The invention belongs to the technical field of hydrogeological prospecting, and particularly discloses an automatic sampling device for hydrogeological prospecting, which utilizes a sampling box body lifting mechanism to realize lifting and descending operations of a sampling box body; and when the depth reaches a specified depth, the underground water is sampled by using a sampling mechanism in the sampling box body. Because the sampling containers are multiple, the continuous sampling of groundwater of different depths is facilitated. The invention is beneficial to realizing continuous automatic sampling of groundwater with different depths through reasonable design, is beneficial to improving the sampling precision and stability, and ensures the accuracy of sampling results.
Description
Technical Field
The invention belongs to the technical field of geological exploration, and particularly relates to an automatic sampling device for hydrogeological exploration.
Background
Hydrogeological survey refers to a research work of hydrogeological investigation for finding out hydrogeological conditions of a region, and aims to grasp the cause, distribution and movement law of groundwater and surface water.
At present, the analysis of the cause, distribution and motion rule of underground water mainly depends on the sampling of underground water.
The existing underground water sampling device is simple in structure mostly, and underground water sampling work is mostly required to be completed through manual control. Summarizing, the existing groundwater sampling device mainly has the following technical problems:
1. the existing underground water sampling device is poor in sealing performance, and the obtained water sample often comprises a water body which does not reach the specified water level, so that the follow-up inaccurate data of water sample detection is caused.
2. The existing underground water sampling device can only roughly estimate the sampling depth and cannot accurately position the sampling depth.
3. The existing underground water sampling device can not realize continuous acquisition work of underground water with different depths, and has low sampling efficiency.
4. The existing underground water sampling device has poor stability in the sampling process, so that underground water sampling is difficult.
In summary, the existing groundwater sampling device needs to be further improved to meet the requirement of groundwater sampling.
Disclosure of Invention
The invention aims to provide an automatic sampling device for hydrogeological exploration, which is used for realizing continuous automatic sampling of groundwater at different depths and is beneficial to improving the sampling precision and stability, thereby ensuring the accuracy of a sampling result.
In order to achieve the purpose, the invention adopts the following technical scheme:
an automatic sampling device for hydrogeological exploration, comprising: the sampling box body, the sampling box body guide mechanism, the sampling box body lifting mechanism, the sampling box body positioning mechanism, the sampling mechanism and the upper computer;
the sampling box body comprises a box body top cover, a box body and a box body bottom cover;
the top cover and the bottom cover of the box body both adopt a quadrangular frustum pyramid structure;
two opposite side walls of the box body are respectively provided with a guide plate, and each guide plate is provided with a guide hole;
at least one sampling hole is arranged on one side wall of the box body;
the sampling hole and the two guide plates are respectively positioned on different side walls of the box body;
a cable hook is arranged on the top cover of the box body;
the sampling box body guide mechanism comprises a guide support, a guide rod and a cable laying support;
the guide support comprises a square flat plate and four support legs arranged at the bottom of the square flat plate;
a cable releasing port is arranged in the middle of the square flat plate;
two opposite edges of the square flat plate are respectively provided with a guide rod through hole;
the number of the guide rods is two, and each guide rod extends downwards from one of the guide rod through holes;
the top of each guide rod is provided with a guide rod limiting end plate, and the diameter of each guide rod limiting end plate is larger than that of each guide rod through hole;
the cable laying support adopts a structure in a shape of a Chinese character 'men';
the cable releasing bracket is arranged on the square flat plate and stretches across the cable releasing port;
the cable laying support comprises two upright posts and a round cross rod arranged between the two upright posts; wherein:
the middle part of the round cross bar is sleeved with a cable laying roller;
the middle concave part of the cable laying roller is uniformly distributed with a plurality of friction convex parts which incline along the anticlockwise direction along the circumferential direction;
two limiting check rings are sleeved in the middle of the circular cross rod, and the cable laying roller is positioned between the two limiting check rings;
each limiting retainer ring is respectively arranged on the circular cross rod through a bolt;
the sampling box body positioning mechanism is arranged on the cable laying support;
the sampling box body positioning mechanism adopts a photoelectric encoder which comprises a light-emitting element, a photosensitive element and a grating disc;
the grating disc is sleeved on the round cross rod and fixedly connected with the cable laying roller; the light-emitting element and the photosensitive element are respectively arranged on the opposite sides of the grating disk; the light-emitting element and the photosensitive element are connected with an upper computer through signal cables;
the sampling box body lifting mechanism comprises a cable disc, a cable disc bracket and a speed reducing motor;
the output shaft of the speed reducing motor is connected with a cable tray, and the cable tray is arranged on a cable tray bracket;
the speed reducing motor is connected with the upper computer through a signal cable;
the cable which is paid out by the cable reel horizontally passes through the cable paying-off roller and then downwards passes through the cable paying-off opening and is connected to the cable hook;
the sampling mechanism is provided with at least one group, and each group of sampling mechanism corresponds to one sampling hole;
the sampling mechanism comprises a telescopic mechanism, a needle tube sampler, a sampling and collecting pipeline and a plurality of sampling containers;
the needle tube sampler comprises a sampling straight cylinder, a sampling tube and a push-pull rod with a plug at the end part;
the sampling pipe is arranged on the front side of the sampling straight cylinder and is connected with the sampling straight cylinder;
the sampling pipe is horizontally arranged and penetrates out of the sampling hole;
the push-pull rod is positioned in the sampling straight cylinder, and the end part with the plug of the push-pull rod is positioned at the front part of the sampling straight cylinder;
the fixed part of the telescopic mechanism is arranged on the box body through a telescopic mechanism bracket, and the movable part is connected with the other end of the push-pull rod;
the telescopic mechanism is connected with the upper computer through a signal cable;
the sampling and collecting pipeline comprises a section of vertical pipe, a section of inclined straight pipe and a plurality of sections of collecting sub-pipelines;
the upper end of the vertical pipe is communicated with the sampling pipe, and the lower end of the vertical pipe is communicated with the upper part of the inclined straight pipe;
the inclined straight pipe is obliquely arranged from one end communicated with the vertical pipe to the obliquely lower side, and two ends of the inclined straight pipe are both opened;
each collecting sub-pipeline is respectively positioned below the corresponding position of the inclined straight pipe and connected to the corresponding position of the inclined straight pipe;
each sampling container is connected to the bottom of one collecting sub-pipeline;
a collecting barrel for recovering residual water in the inclined straight pipe is arranged below the lower end of the inclined straight pipe;
a first electromagnetic valve is arranged on the sampling pipe and is positioned on the front side of the joint of the vertical pipe and the sampling pipe;
a second electromagnetic valve is arranged on the vertical pipe;
a third electromagnetic valve is arranged at the lower end of the inclined straight pipe, and a fourth electromagnetic valve is arranged at the higher end of the inclined straight pipe;
a fifth electromagnetic valve is arranged on each collecting sub-pipeline;
the first, second, third, fourth and fifth electromagnetic valves are respectively connected with an upper computer through cables;
the top of each sampling container is provided with an air hole;
and a liquid level sensor is arranged at the upper part of each sampling container and is connected with an upper computer through a signal cable.
Preferably, the side wall of the box body is also provided with a square filter screen;
wherein, square filter screen passes through the bolt and installs on the lateral wall of box body, and forms the parcel to the sampling hole.
Preferably, the number of sampling holes is three, and the number of sampling mechanisms is also three;
the sampling pipe of each group of sampling mechanisms extends outwards through one sampling hole, and a sealing ring is mounted at each sampling hole.
Preferably, the cable releasing port is a square cable releasing port.
Preferably, the guide rod comprises a guide rod limiting end plate and a plurality of guide straight rods with equal length;
one end of each guide straight rod is a male head and is provided with an external thread, and the other end of each guide straight rod is a female head and is provided with an internal thread;
the lower surface of the guide rod limiting end plate is provided with a pipe section with external threads, and the pipe section is matched with the internal threads of the female head.
Preferably, the telescopic mechanism adopts a telescopic cylinder, wherein a piston rod of the telescopic cylinder is connected with the other end of the push-pull rod.
Preferably, the diameter of the inclined straight pipe is smaller than the diameter of the collecting sub-pipe.
Preferably, the sampling box body further comprises a plurality of sampling container supporting tables;
the sampling container support platform comprises a support platform base and a plurality of columnar support parts arranged on the support platform base;
each sampling container is placed on one columnar supporting part;
the box body bottom cover is provided with a base placing area corresponding to the base of each supporting platform.
The invention has the following advantages:
as mentioned above, the invention relates to an automatic sampling device for hydrogeological exploration, which utilizes a sampling box body lifting mechanism to realize the lifting and descending operation of a sampling box body, utilizes a sampling box body guiding mechanism to realize the guiding of the sampling box body in the descending process of the sampling box body so as to ensure the stability of the sampling box body in the sampling process, and utilizes a sampling box body positioning mechanism to realize the accurate position positioning of the sampling box body so as to conveniently reach the specified depth to sample underground water; after reaching the appointed degree of depth, utilize the sampling mechanism in the sampling box to realize the sampling of groundwater, specifically, the sampling mechanism includes telescopic machanism, needle tubing sample thief, sampling collecting pipe way and a plurality of sampling container, wherein utilizes telescopic machanism to promote the needle tubing sample thief and realize the sampling to groundwater, the groundwater of sampling reachs in the sampling container through sampling collecting pipe way. Because the sampling containers are multiple, the continuous sampling of groundwater of different depths is facilitated. The invention realizes the active sampling of the groundwater by using the needle tube sampler in the sampling process, and only the sampling hole of the whole sampling box body is contacted with the outside, thereby being beneficial to ensuring the sealing property of the device of the invention, and no groundwater seeps into the sampling box body in the sampling process. The invention is beneficial to realizing continuous automatic sampling of groundwater with different depths through reasonable design, is beneficial to improving the sampling precision and stability, and ensures the accuracy of sampling results.
Drawings
Fig. 1 is a schematic structural view of an automatic sampling apparatus for hydrogeological exploration in embodiment 1 of the present invention.
Fig. 2 is a schematic view of an internal structure of a sampling box in embodiment 1 of the present invention.
Fig. 3 is a schematic structural view of the guide straight rod in embodiment 1 of the present invention.
Fig. 4 is a schematic structural view of a cable laying stand according to embodiment 1 of the present invention.
Fig. 5 is a schematic radial cross-sectional view of a cable laying roller according to embodiment 1 of the present invention.
Fig. 6 is a schematic structural view of a sampling box lifting mechanism in embodiment 1 of the present invention.
Fig. 7 is a schematic structural diagram of a sampling container in embodiment 1 of the present invention.
Fig. 8 is a schematic structural view of a supporting stand of a sampling container in embodiment 1 of the present invention.
Fig. 9 is a schematic flow chart of an automatic sampling method for hydrogeological exploration in embodiment 2 of the present invention.
The sampling box comprises a sampling box body, a box top cover, a box body, a box bottom cover, a guide plate, a guide hole, a sampling hole, a cable hook, a guide support and a guide rod, wherein 1-the sampling box body, 2-the box top cover, 3-the box body, 4-the box bottom cover, 5-the guide plate, 6-the guide hole, 7-the sampling hole, 8-the cable hook, 9-the guide;
11-a cable laying support, 12-a square flat plate, 13-a supporting leg, 14-a well, 15-a cable laying port, 16-a guide rod through hole, 17-a guide rod limiting end plate, 18-a guide straight rod, 19-an upright post and 20-a round cross rod;
21-a cable laying roller, 22-a limiting retainer ring, 23-a photosensitive element, 24-a grating disc, 25-a cable disc, 26-a cable disc bracket, 27-a speed reducing motor, 28-a cable, 29-a middle concave part, 30-a friction convex part and 31-a telescopic mechanism;
32-a sampling container, 33-a sampling straight cylinder, 34-a sampling pipe, 35-a push-pull rod, 36-a vertical pipe, 37-an inclined straight pipe, 38-a collecting sub-pipeline, 39-a liquid level sensor, 40-a collecting barrel and 41-a first electromagnetic valve;
42-second solenoid valve, 43-third solenoid valve, 44-fourth solenoid valve, 45-fifth solenoid valve, 46-square filter screen, 47-sampling container support table, 48-support table base, 49-columnar support part, 50-base placing area and 51-air hole.
Detailed Description
The invention is described in further detail below with reference to the following figures and detailed description:
example 1
As shown in figure 1, the invention relates to an automatic sampling device for hydrogeological exploration, which comprises a sampling box body 1, a sampling box body guide mechanism, a sampling box body lifting mechanism, a sampling box body positioning mechanism, a sampling mechanism and an upper computer.
The sampling box body 1 is used for realizing the installation of a sampling mechanism and the like.
As shown in fig. 2, the sampling box 1 includes a box top cover 2, a box body 3, and a box bottom cover 4.
The box body 3 is square as shown in fig. 1. The box body 3 has four side walls, which define the direction toward the outside of the paper as the front, and a guide plate, for example, a guide plate 5, is provided on each of the left and right opposite side walls of the box body 1.
Taking one of the guide plates 5 as an example, each guide plate 5 is provided with a guide hole 6, so that the guide effect is realized.
The front side wall of the box body 1 is also provided with sampling holes 7, and the number of the sampling holes is 1, 2 or 3, for example. As can be seen from fig. 1, the sampling holes 7 and the guide plates 5 are respectively located on different side walls of the box body 1.
Of course, the directions of front, back, left and right in this embodiment 1 are merely exemplary, so as to facilitate the description of the present invention.
Be equipped with cable couple 8 on box top cap 2, the cable bottom of the box elevating system of being convenient for of sampling hangs on the sampling box.
In a preferred mode, the middle box top cover 2 and the box bottom cover 4 both adopt a quadrangular frustum pyramid structure.
Taking the case of the top case cover 2, the top case cover 2 adopts a quadrangular frustum pyramid structure, and the cross-sectional area of the top case cover 2 is gradually increased from top to bottom, and similarly, the cross-sectional area of the bottom case cover 4 is gradually decreased from top to bottom.
The structural design of the box bottom cover 4 is favorable for reducing the resistance of the sampling box body 1 in the descending process, and ensures the stability of the sampling box body 1 in the descending process, and similarly, the box top cover 2 is favorable for ensuring the stability of the sampling box body 1 in the ascending process.
The sampling box body guide mechanism in the embodiment 1 has the function of guiding the sampling box body 1 in the ascending and descending processes, so that the stability of the sampling box body 1 in the ascending and descending processes is ensured.
As shown in fig. 1, the sampling box body guide mechanism comprises a guide bracket 9, a guide rod 10 and a cable laying bracket 11.
Wherein, guide bracket 9 includes square flat 12 and installs four supporting legs 13 in square flat 12 bottom. After the hydrogeological exploration drilling process is completed, the guide bracket 9 is installed at the position of the drilling well 14, as shown in fig. 1.
A (e.g. square) cable laying port 15 is arranged in the middle of the square flat plate 12, which is beneficial to realizing cable laying operation.
A guide bar through hole 16 is formed in each of two opposite side portions (right and left side portions in fig. 1) of the square plate 12.
There are two guide rods 10, each extending downwardly from one of the guide rod through holes 16.
A guide rod limiting end plate 17 is arranged at the top of each guide rod 10, and the diameter of the guide rod limiting end plate 17 is larger than that of the guide rod through hole 16 so as to ensure that the top end of each guide rod 10 is always positioned on the square flat plate 12.
Taking one of the guide rods 10 as an example, the guide rod comprises a guide rod limiting end plate 17 and a plurality of guide straight rods 18 with equal length.
As shown in fig. 3, one end of each guiding straight rod 18 is a male head a with external threads, and the other end is a female head B with internal threads, wherein the male head a and the female head B are mutually matched.
The lower surface of the guide rod limiting end plate 17 is provided with a pipe section with external threads, and the pipe section is matched with the female head B.
Connect gradually from top to bottom through the direction straight-bar with the spacing end plate 17 of guide bar and many length such as, do benefit to the assembly that realizes guide bar 10, and after the assembly, the length of guide bar 10 can satisfy the requirement.
As shown in FIG. 4, the cable-laying support 11 is in a structure of a Chinese character 'men'.
As shown in fig. 1, the cable-laying support 11 is mounted on a square flat plate 12 and is arranged to cross over the cable-laying port 15.
The cable-laying bracket 11 functions to support the cable in the sampling box elevating mechanism (so that the cable is turned from the horizontal direction to the vertical direction). Simultaneously, this cable laying support 11 can also provide mounting platform for sampling box positioning mechanism.
The payout bracket 11 comprises two uprights 19 and a circular cross-bar 20 mounted between the two uprights.
The cable laying roller 21 is sleeved in the middle of the circular cross bar 20.
The payout roller 21 is rotatable on the circular rail 20 to facilitate supporting the cable around the payout roller 21.
In addition, two limit stops, such as the limit stops 22 in fig. 4, are sleeved in the middle of the circular cross bar 20, and each limit stop 22 is mounted on the circular cross bar 20 through a bolt (not shown).
The position of the limiting retainer rings 22 is fixed by the design, and the cable laying roller 21 is positioned between the two limiting retainer rings 22.
The two limiting stop rings 22 in this embodiment 1 can prevent the cable-laying roller 21 from displacing in the axial direction of the circular cross bar 20, so as to ensure the stability of the rotation of the cable-laying roller 21.
As shown in FIG. 4, the sampling box positioning mechanism is mounted on the payout bracket 11.
The sampling box body positioning mechanism is used for monitoring the descending height of the sampling box body 1 in real time and uploading the descending height to an upper computer.
The sample chamber positioning mechanism is preferably implemented using a photoelectric encoder that includes a photosensor 23, a light emitting element, and a grating disk 24. Wherein, the photosensitive element 23 and the light-emitting element are respectively connected with an upper computer through signal cables.
The grating disk 24 is sleeved on the circular cross bar 20 and fixedly connected with the cable laying roller 21, for example, in a bolt connection manner.
The light sensitive element 23 and the light emitting element are located on one side of the grating disk 24, respectively.
Taking the mounting of the light sensitive element 23 as an example, the light sensitive element 23 is arranged on one of the uprights 19, for example by means of a bolt.
The embodiment 1 can realize the accurate control of the descending depth position of the sampling box body 1 by using the photoelectric encoder. It should be noted that the photoelectric encoder in this embodiment 1 is a mature encoder, and therefore, the description is not repeated.
In addition, in order to ensure the rotational stability of the payout roller 21, the payout roller 21 is also designed.
As shown in fig. 5, the intermediate recessed portion 29 of the payout roller 21 is uniformly provided with a plurality of friction protrusions, such as the friction protrusion 30, having a uniform inclination direction, such as an inclination in a counterclockwise direction, along the circumferential direction of the intermediate recessed portion 29.
Above structural design does benefit to the assurance at the cable laying in-process, because the frictional force between cable 28 and the cable laying gyro wheel 21 is great for cable 28 is at the in-process that descends, and cable laying gyro wheel 21 is in the rotating condition always, thereby guarantees that the range finding is accurate.
As shown in fig. 1 and 6, the sampling box elevating mechanism includes a cable tray 25, a cable tray holder 26, and a reduction motor 27.
An output shaft of the reduction motor 27 is connected (e.g., coupled) to the cable drum 25 (shaft).
The cable tray 25 is mounted on the cable tray bracket 26, and the reduction motor 27 is connected with the upper computer through a signal cable. The cable paid out by the cable reel 25 passes through the cable paying-out opening 15 after horizontally passing through the cable paying-out roller 21 and is connected to the cable hook 8.
Under the drive of the speed reducing motor 27, the cable 28 can drive the sampling box body 1 to realize automatic descending and ascending actions.
Sampling box guiding mechanism and the cooperation of sampling box elevating system in this embodiment 1 do benefit to the stable lift that realizes sampling box 1 to guarantee the stability of sampling box 1 when the sampling.
As shown in fig. 2, the sampling mechanism has at least one group, such as one group, two groups, or three groups. Each set of sampling mechanisms corresponds to one sampling aperture 7. The functions of all groups of sampling mechanisms are the same, and the number of the sampling mechanisms can be flexibly set according to the requirement of the number of the sampling groups.
Taking one group of sampling mechanisms as an example: the sampling mechanism includes a telescoping mechanism 31, a needle sampler, a sample collection tube, and a plurality (e.g., 3-5) of sample containers 32. The structure of the needle tube sampler is similar to that of the prior injection needle tube.
The needle sampler comprises a sampling straight cylinder 33, a sampling tube 34 and a push-pull rod 35 with a plug at the end.
The sampling tube 34 is a straight tube, is installed on the front side of the sampling straight cylinder 33, and is connected with the sampling straight cylinder 33.
The sampling tube 34 is arranged horizontally and passes out through the sampling hole 7. And a sealing ring (not shown) is respectively arranged at each sampling hole 7 to ensure the sealing property of the sampling box body 1 and prevent groundwater from permeating into the sampling box body 1.
The push-pull rod 35 is positioned in the sampling straight cylinder 33, and the stoppered end of the push-pull rod 35 is positioned in the front of the sampling straight cylinder 33.
Here the front of the sampling cylinder, i.e. the right part in fig. 2. The telescopic mechanism adopts a mature direct-acting mechanism, such as a telescopic cylinder. Wherein, the fixed part (cylinder body) of telescopic cylinder is installed on the box body (inside wall) through telescopic machanism support, and telescopic cylinder's piston rod links to each other (for example link to each other through the shaft coupling) with the other end of push-and-pull rod 35.
The telescopic cylinder is connected with the upper computer through a signal cable. Above structural design can realize the automated control to push-and-pull rod 35, does benefit to the automatic extraction and the emission action that realize the sampling mechanism.
The sample collection circuit includes a section of vertical tube 36, a section of inclined straight tube 37, and a plurality of sections of collection sub-circuit 38.
The vertical tube 36 is a vertically arranged straight tube, the upper end of the vertical tube is communicated with the sampling tube 34, the lower end of the vertical tube 36 is communicated with the upper part of the inclined straight tube 37, and the inclined straight tube 37 is an inclined straight tube.
Specifically, the inclined straight tube 37 is arranged obliquely downward from one end communicating with the vertical tube 36. Both ends (the higher end and the lower end) of the inclined straight tube 37 are open. The purpose of this kind of design lies in:
after one-time sampling is finished, a small amount of underground water (sample liquid) remains in the sampling straight tube 33 or the inclined straight tube 37, and the residual sample liquid is conveniently discharged in time by matching with the following electromagnetic valve, so that the accuracy of the next measurement is ensured.
This embodiment is through the arrangement mode of slope straight tube for remaining appearance liquid can be discharged under the action of gravity automatically.
The collecting sub-pipes 38 are respectively located below the corresponding positions of the inclined straight pipes 37 and are respectively connected to the corresponding positions of the inclined straight pipes 37. Each sampling vessel 32 is connected to the bottom of one of the collection sub-lines 38, for example by a threaded connection.
As shown in fig. 7, in order to facilitate the injection of the sampled solution into a certain sampling container 32, a vent hole 51 is provided at the top of the sampling container 32, and a liquid level sensor 39 is installed in each sampling container 32.
The level sensor 39 is operative to detect whether the sample liquid in the sampling vessel 32 has reached the upper limit position at the present time.
The top of each sampling container 32 is provided with a vent hole for injecting the sample liquid in the sampling straight cylinder 33 into the sampling container.
The liquid level sensor 39 is connected with an upper computer through a signal cable.
Further, a collecting tub 40 for collecting residual water in the inclined straight pipe is provided below the lower end of the inclined straight pipe 37.
After once taking a sample and before taking a sample again, need earlier discharge the remaining appearance liquid in the slope straight tube 37, avoid the mixture between the appearance liquid of different degree of depth positions to influence the detection accuracy of sampling solution.
Based on the sampling and collecting pipeline, electromagnetic valves are arranged at different positions of the sampling and collecting pipeline, so that automatic control is realized.
A first solenoid valve 41 is provided on the sampling tube 34, and the first solenoid valve 41 is located on the front side of the junction of the vertical tube 36 and the sampling tube 34, i.e., as shown on the right side in fig. 2. A second solenoid valve 42 is provided on the vertical pipe 36.
A third electromagnetic valve 43 is arranged at the lower end of the inclined straight pipe 37, a fourth electromagnetic valve 44 is arranged at the higher end of the inclined straight pipe 37, and the third electromagnetic valve 43 and the fourth electromagnetic valve 44 are beneficial to emptying residual liquid in the inclined straight pipe 37.
A solenoid valve 45 of five size is provided on each collector sub-line 38. To distinguish the individual solenoid valves 45, the individual solenoid valves 45 may be numbered for ease of distinction.
The first, second, third, fourth and fifth electromagnetic valves are respectively connected with the upper computer through cables.
The diameter of the inclined straight tube 37 in this embodiment 1 is smaller than the diameter of each of the collecting sub-tubes 38, so that the sample liquid in the inclined straight tube 37 does not remain much after each injection into the sampling vessel 32.
In order to avoid the influence of impurities when pumping groundwater, a square strainer 46 is provided on the side wall of the box body 3. The square filter screen 46 is mounted on the side wall of the box body 3 through bolts, and wraps each sampling hole 7.
By the aid of the design, smooth sampling can be effectively guaranteed, and the success rate of automatic sampling is improved.
It should be noted that the sampling mechanism further includes a pipeline bracket for supporting the needle sampler, the sampling collection pipeline, and the like, and the pipeline bracket may be an existing pipeline bracket in the prior art, and therefore, the details are not repeated here.
The host computer is located the well drilling top in this embodiment 1, and the host computer is perforated through setting up the cable on the lateral wall of sampling box 1 with the connecting cable of sampling box 1 internal sensor, solenoid electric valve etc. and the cable perforation department leakproofness is good.
As shown in fig. 8, the sampling box 1 further includes a plurality of sampling container support platforms, such as sampling container support platform 47. Each sampling container support platform 47 corresponds to a respective sampling container 32 of a set of sampling mechanisms.
The sampling container support platform functions to simultaneously support the individual sampling containers 32 in each sampling mechanism.
One of the sample container support platforms 47 is illustrated in fig. 8, for example.
The sampling container support base 47 includes a support base 48 and a plurality of columnar supports 49 mounted on the support base.
Each sample container 32 rests on a cylindrical support 49.
Accordingly, a base placing area 50 is provided on the bottom cover 4 corresponding to each support base 48. The base receiving area 50 is a square recessed area in which the lower portion of the support base 48 is located.
This embodiment can realize the continuous automatic sampling of different degree of depth groundwater through above structural design, and does benefit to the precision and the stability that improve the sampling to ensure the accuracy of sampling result.
Example 2
This embodiment 2 describes an automatic sampling method for hydrogeological exploration, which is based on the automatic sampling device for hydrogeological exploration described in embodiment 1, and as shown in fig. 9, the method includes the following steps:
I. sequentially assembling all mechanisms of the automatic sampling device for hydrogeological exploration to complete the assembly of the device;
and II, controlling the speed reducing motor 27 to rotate by the upper computer, automatically releasing the cable from the cable tray 25, stably descending the sampling box body under the action of the guide rod 10, and monitoring the descending height of the sampling box body 1 in real time by the sampling box body positioning mechanism in the descending process.
And III, after the sampling box body 1 descends to a preset depth position, the host computer controls the speed reducing motor 27 to stop acting, and at the moment, the sampling box body 1 stops at a certain depth position accurately.
And IV, a certain sampling mechanism in the sampling box body 1 acts and automatically pumps the underground water into a certain sampling container 32.
The specific process is as follows:
IV.1, the upper computer controls the first electromagnetic valve 41 to be opened (other electromagnetic valves are closed), controls the telescopic mechanism (extraction) to act, drives the push-pull rod 35 to act, and extracts the underground water into the sampling straight cylinder 33 through the sampling pipe 34;
IV.2, the upper computer controls the first electromagnetic valve 41 to be closed and controls the second electromagnetic valve 42 and a fifth electromagnetic valve 45 corresponding to the sampling container 32 to be injected to be opened (other electromagnetic valves are closed);
and IV.3, controlling the action of a telescopic mechanism by the upper computer, driving a push-pull rod 35 (discharge) to act by the telescopic mechanism, and discharging the underground water in the sampling straight cylinder 33 into the sampling container 32 to be injected in the step IV.2 through a vertical pipe 36 and an inclined straight pipe 37.
And IV.4, when the liquid level sensor 39 to be injected into the sampling container 32 monitors that the sample liquid reaches the upper limit position, uploading the information to an upper computer, and controlling by the upper computer to stop injecting the sample liquid into the current sampling container 32.
IV.5, when the solenoid valve 45 corresponding to the sampling container 32 is closed, the solenoid valve 43 and the solenoid valve 44 are opened simultaneously, the telescopic mechanism continues to act, and a small amount of residual liquid is discharged into the collecting barrel 40 through the vertical pipe 36 and the inclined straight pipe 37.
At this point, the discharge of the residual liquid in the sampling straight tube 33, the vertical tube 36 and the inclined straight tube 37 is completed, and the sampling is completed once.
V. the upper computer controls the speed reducing motor 27 to rotate, the cable disc 25 automatically releases the cable, the sampling box body positioning mechanism monitors the descending height of the sampling box body 1 in real time in the descending process, and the upper computer judges whether the sampling box body reaches the position of the next sampling depth.
VI, when the next sampling depth position is reached, the speed reducing motor 27 stops acting, and the sampling box body 1 stops descending.
The above step IV is repeated, and the sample liquid is injected into another sampling container 32 by the sampling mechanism.
It should be noted here that if each sampling container 32 under a certain sampling mechanism is filled with sample liquid, another sampling mechanism is started to continue the groundwater sampling operation.
And VII, repeating the step V and the step VI until the groundwater sampling at each depth position is completed.
VIII, the upper computer controls the speed reducing motor 27 to rotate reversely, the sampling box body rises to the position of a drilling hole, and the whole sampling process is completed.
The process shows that the method is beneficial to realizing the automatic sampling of underground water, the sampling depth can be accurately controlled, the stability of the whole device is better during sampling, the sealing performance of the device is good, and therefore the accuracy of the sampling result can be ensured.
Compared with the existing underground water sampling mode, the underground water sampling method obviously improves the underground water sampling efficiency and the sampling precision.
It should be understood, however, that the description herein of specific embodiments is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. An automatic sampling device is used in hydrogeological survey which characterized in that includes: the sampling box body, the sampling box body guide mechanism, the sampling box body lifting mechanism, the sampling box body positioning mechanism, the sampling mechanism and the upper computer;
the sampling box body comprises a box body top cover, a box body and a box body bottom cover;
the top cover and the bottom cover of the box body both adopt a quadrangular frustum pyramid structure;
two opposite side walls of the box body are respectively provided with a guide plate, and each guide plate is provided with a guide hole;
at least one sampling hole is arranged on one side wall of the box body;
the sampling hole and the two guide plates are respectively positioned on different side walls of the box body;
a cable hook is arranged on the top cover of the box body;
the sampling box body guide mechanism comprises a guide support, a guide rod and a cable laying support;
the guide support comprises a square flat plate and four support legs arranged at the bottom of the square flat plate;
a cable releasing port is arranged in the middle of the square flat plate;
two opposite edges of the square flat plate are respectively provided with a guide rod through hole;
the number of the guide rods is two, and each guide rod extends downwards from one guide rod through hole;
the top of each guide rod is provided with a guide rod limiting end plate, and the diameter of each guide rod limiting end plate is larger than that of each guide rod through hole;
the cable laying support adopts a structure in a shape of a Chinese character 'men';
the cable releasing bracket is arranged on the square flat plate and is arranged above the cable releasing port in a crossing manner;
the cable laying support comprises two upright posts and a round cross rod arranged between the two upright posts; wherein:
the middle part of the round cross bar is sleeved with a cable laying roller;
a plurality of friction convex parts which incline along the anticlockwise direction are uniformly distributed in the middle concave part of the cable laying roller along the circumferential direction;
two limiting check rings are sleeved in the middle of the circular cross rod, and the cable laying roller is positioned between the two limiting check rings;
each limiting retainer ring is respectively arranged on the circular cross rod through a bolt;
the sampling box body positioning mechanism is arranged on the cable laying support;
the sampling box body positioning mechanism adopts a photoelectric encoder which comprises a light-emitting element, a photosensitive element and a grating disc;
the grating disc is sleeved on the round cross rod and fixedly connected with the cable laying roller; the light-emitting element and the photosensitive element are respectively arranged on the opposite sides of the grating disk; the light-emitting element and the photosensitive element are connected with an upper computer through signal cables;
the sampling box body lifting mechanism comprises a cable disc, a cable disc bracket and a speed reducing motor;
the output shaft of the speed reducing motor is connected with a cable tray, and the cable tray is arranged on a cable tray bracket;
the speed reducing motor is connected with the upper computer through a signal cable;
the cable which is paid out by the cable reel horizontally passes through the cable paying-off roller and then downwards passes through the cable paying-off opening and is connected to the cable hook;
the sampling mechanism is provided with at least one group, and each group of sampling mechanism corresponds to one sampling hole;
the sampling mechanism comprises a telescopic mechanism, a needle tube sampler, a sampling and collecting pipeline and a plurality of sampling containers;
the needle tube sampler comprises a sampling straight cylinder, a sampling tube and a push-pull rod with a plug at the end part;
the sampling pipe is arranged on the front side of the sampling straight cylinder and is connected with the sampling straight cylinder;
the sampling pipe is horizontally arranged and penetrates out of the sampling hole;
the push-pull rod is positioned in the sampling straight cylinder, and the end part with the plug of the push-pull rod is positioned at the front part of the sampling straight cylinder;
the fixed part of the telescopic mechanism is arranged on the box body through a telescopic mechanism bracket, and the movable part is connected with the other end of the push-pull rod;
the telescopic mechanism is connected with the upper computer through a signal cable;
the sampling and collecting pipeline comprises a section of vertical pipe, a section of inclined straight pipe and a plurality of sections of collecting sub-pipelines;
the upper end of the vertical pipe is communicated with the sampling pipe, and the lower end of the vertical pipe is communicated with the upper part of the inclined straight pipe;
the inclined straight pipe is obliquely arranged from one end communicated with the vertical pipe to the obliquely lower side, and two ends of the inclined straight pipe are both opened;
each collecting sub-pipeline is respectively positioned below the corresponding position of the inclined straight pipe and connected to the corresponding position of the inclined straight pipe;
each sampling container is connected to the bottom of one collecting sub-pipeline;
a collecting barrel for recovering residual water in the inclined straight pipe is arranged below the lower end of the inclined straight pipe;
a first electromagnetic valve is arranged on the sampling pipe and is positioned on the front side of the joint of the vertical pipe and the sampling pipe;
a second electromagnetic valve is arranged on the vertical pipe;
a third electromagnetic valve is arranged at the lower end of the inclined straight pipe, and a fourth electromagnetic valve is arranged at the higher end of the inclined straight pipe;
a fifth electromagnetic valve is respectively arranged on each collecting sub-pipeline;
the first, second, third, fourth and fifth electromagnetic valves are respectively connected with an upper computer through cables;
the top of each sampling container is provided with an air hole;
and a liquid level sensor is arranged at the upper part of each sampling container and is connected with an upper computer through a signal cable.
2. The automatic sampling device for hydrogeological survey according to claim 1,
a square filter screen is also arranged on the side wall of the box body;
wherein, square filter screen passes through the bolt and installs on the lateral wall of box body, and right the sampling hole forms the parcel.
3. The automatic sampling device for hydrogeological survey according to claim 1,
the number of the sampling holes is three, and the number of the sampling mechanisms is also three;
the sampling pipe of each group of sampling mechanisms extends outwards through one sampling hole, and a sealing ring is mounted at each sampling hole.
4. The automatic sampling device for hydrogeological survey according to claim 1,
the cable releasing port is a square cable releasing port.
5. The automatic sampling device for hydrogeological survey according to claim 1,
the guide rod comprises a guide rod limiting end plate and a plurality of guide straight rods with equal length;
one end of each guide straight rod is a male head and is provided with an external thread, and the other end of each guide straight rod is a female head and is provided with an internal thread;
the lower surface of the guide rod limiting end plate is provided with a pipe section with external threads, and the pipe section is matched with the internal threads of the female head.
6. The automatic sampling device for hydrogeological survey according to claim 1,
the telescopic mechanism adopts a telescopic cylinder, wherein a piston rod of the telescopic cylinder is connected with the push-pull rod.
7. The automatic sampling device for hydrogeological survey according to claim 1,
the diameter of the inclined straight pipe is smaller than that of the collecting sub-pipeline.
8. The automatic sampling device for hydrogeological survey according to claim 1,
the sampling box body also comprises a plurality of sampling container supporting tables;
the sampling container support platform comprises a support platform base and a plurality of columnar support parts arranged on the support platform base;
each sampling container is placed on one columnar supporting part;
and a base placing area is respectively arranged on the box body bottom cover corresponding to the base of each supporting platform.
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| CN112284815A (en) * | 2020-09-08 | 2021-01-29 | 中国水利水电科学研究院 | Large-capacity water sampler |
| CN114878247B (en) * | 2022-07-11 | 2022-09-23 | 中材地质工程勘查研究院有限公司 | Hydrogeology reconnaissance water source sampling test device |
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