CN113280888A - Double-resistance high-precision underground water level measuring instrument and water level calculation method thereof - Google Patents
Double-resistance high-precision underground water level measuring instrument and water level calculation method thereof Download PDFInfo
- Publication number
- CN113280888A CN113280888A CN202110259176.9A CN202110259176A CN113280888A CN 113280888 A CN113280888 A CN 113280888A CN 202110259176 A CN202110259176 A CN 202110259176A CN 113280888 A CN113280888 A CN 113280888A
- Authority
- CN
- China
- Prior art keywords
- water level
- resistor
- resistance
- measuring instrument
- underground water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 106
- 238000004364 calculation method Methods 0.000 title claims abstract description 13
- 238000009434 installation Methods 0.000 claims abstract description 93
- 238000012544 monitoring process Methods 0.000 claims abstract description 22
- 239000003673 groundwater Substances 0.000 claims abstract description 17
- 238000004891 communication Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 7
- 230000001681 protective effect Effects 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 10
- 238000005553 drilling Methods 0.000 claims description 8
- 239000004576 sand Substances 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 15
- 238000005259 measurement Methods 0.000 description 13
- 230000009286 beneficial effect Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 5
- 239000013049 sediment Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention belongs to the technical field of underground water level monitoring, and particularly relates to a double-resistance high-precision underground water level measuring instrument and a water level calculating method thereof. Including first ammeter, second ammeter, control system and the power that is located the ground top, control system contains data acquisition calculation module and communication module, data acquisition calculation module and communication module electric connection to and set up at subaerial first resistance, second resistance, pressure sensing piece and installation pipe, control system's communication module and remote monitoring system wireless connection, the lateral wall of installation pipe is equipped with the inlet opening in vertical direction, be equipped with first mounting groove and second mounting groove on the installation pipe relatively, the material of first resistance and second resistance, cross sectional shape and area homogeneous phase are the same. This technical scheme is used for solving because ground water level measuring operating mode is complicated, leads to traditional ground water level meter to the not good problem of ground water level monitoring effect.
Description
Technical Field
The invention belongs to the technical field of underground water level monitoring, and particularly relates to a double-resistance high-precision underground water level measuring instrument and a water level calculating method thereof.
Background
The underground water level monitoring is widely applied to the fields of geological disasters, water quality monitoring, environment monitoring and the like, and has wide applicability. According to the underground water level monitoring data, a basis can be provided for reasonably exploiting underground water; the underground water level can be accurately measured, and key reference basis can be provided for analysis of the cause of geological disasters and effective landslide early warning.
At present, the most widely used underground water level monitoring is a float type water level meter, a pressure sensing type water level meter and the like. The use of the float-type water level gauge is limited by the drilling quality (the inclination of a drill hole) and the like, the suspension cable is easy to influence the use of the instrument due to expansion and contraction, knotting, line clamping and the like, and the float and the heavy hammer can influence the test precision and the use of the instrument due to corrosion or soil contamination and the like after long-term use; the pressure sensing type water level meter converts the underground water pressure into the hydrostatic pressure, in the actual geological process, the underground water often flows, the turbidity, the mineral composition, the content and the like of the underground water change along with the time and the geological conditions, so that the density of the underground water often changes, the actual depth of the underground water and the calculated depth obtained according to the water pressure have deviation, and therefore the measuring method has errors, and even has larger errors under certain special conditions.
Disclosure of Invention
Aiming at the defects of the technology, the invention aims to provide a double-resistor high-precision underground water level measuring instrument and a water level calculating method thereof, which are used for solving the problem that the traditional underground water level meter has poor underground water level monitoring effect due to the complex working condition of underground water level measurement.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a double-resistor high-precision underground water level measuring instrument comprises a control system, a first ammeter, a second ammeter and a power supply, wherein the control system is positioned above the ground and comprises a data acquisition and calculation module and a communication module, the data acquisition and calculation module is electrically connected with the communication module, and a first resistor, a second resistor, a pressure sensing sheet and an installation pipe are arranged under the ground, the communication module of the control system is wirelessly connected with a remote monitoring system, a first installation groove and a second installation groove are oppositely arranged on the installation pipe, the materials, the cross section shapes and the areas of the first resistor and the second resistor are the same, the pressure sensing sheet and the first resistor are both arranged in the first installation groove, an installation gap is arranged between the first resistor and the second installation groove, the second resistor is arranged in the second installation groove, and the two sides of the pressure sensing sheet are elastically and hermetically connected with the inner side opening edge of the first installation groove, when the pressure sensing piece is subjected to outside water pressure, the pressed part is bent inwards to deform and is attached to the side face of the first resistor, the pressure sensing piece can automatically break away from resetting when the pressure disappears, one side, facing the first resistor, of the pressure sensing piece is provided with a conducting layer, and the other side, symmetrical to the conducting layer, of the pressure sensing piece is provided with an insulating layer;
one utmost point of power passes through the lower extreme electric connection of wire and conducting layer, another utmost point of power passes through the upper end electric connection of wire and first resistance, first ammeter sets up on the wire between power and conducting layer, second resistance, second ammeter and power form the return circuit, first ammeter and second ammeter and control system's data acquisition calculation module electric connection.
The remote monitoring system is an existing software control system for monitoring and controlling geological disasters, water quality and environment, and is mainly used for receiving water level monitoring data of a water level measuring instrument, and performing functions of analysis, recording, judgment and the like.
The conducting layer is any one of a conducting coating, a conducting wire filament and a conducting plate, and the pressure sensing piece has the advantages that the conducting coating, the conducting wire filament and the conducting plate are arranged on the pressure sensing piece, the influence on the deformation performance of the pressure sensing piece is small, namely the pressure sensing piece is deformed by small pressure, and the sensitivity of underground water level monitoring is improved.
Further inject, the connecting wire setting of power, first ampere meter and second ampere meter is in first mounting groove and second mounting groove, and its beneficial part lies in, sets up the complexity that can simplify this mounting tube in its inside, makes it more convenient in the installation, and many mounting tubes when splicing, can set up the tip of wire at the tip of first mounting groove and second mounting groove, also can make the wire splice and communicate when many mounting tubes splice promptly.
The instrument is further limited, the installation pipes can be spliced into a plurality of sections according to the depth of the actually measured water level, the end parts of the adjacent installation pipes are connected by screw threads, after the end parts of the adjacent installation pipes are screwed, the axial projections of the adjacent first resistors are superposed, the threaded connection parts of the adjacent installation pipes are provided with sealing gaskets, the installation pipe positioned at the lowest end is provided with a sealing end, the upper ends of the first resistors and the upper ends of the conducting layers in the installation pipes are respectively provided with springs, and the lower ends of the first resistors and the lower ends of the conducting layers are respectively provided with conducting strips, so that the instrument has the advantages that the instrument can be used for measuring the underground water level in a wider range and is convenient to install and transport by arranging spring pins at the connecting ends of the installation pipes positioned above, limiting the threaded connection in a mode that the connecting ends of the installation pipes positioned below are provided with grooves, or limiting the position of the threaded connection in a mode that identification lines are arranged on the outer surfaces of the installation pipes, can guarantee adjacent first resistance, conducting layer and pressure sensing piece respectively can be smooth the concatenation together all, after the concatenation simultaneously, will in close contact between spring and the conducting strip, extrude each other simultaneously, guarantee the electrically conductive effect between adjacent first resistance and the conducting layer, the sealing washer can prevent that groundwater from getting into the inside of first mounting groove and second mounting groove through threaded connection department.
Further inject, the bottom of installation pipe is equipped with arranges the husky hole, the upper end of installation pipe is equipped with high-pressure cleaning equipment, and its beneficial effect lies in, and after long-time the use, silt can enter into in the installation pipe through first inlet opening to form silt siltation sediment. Only need inject high pressure water downwards from the upper end of installation pipe through high pressure cleaning equipment this moment, the inside silt of installation pipe will be impacted to high pressure water, makes it discharge through the sediment discharge hole of bottom to eliminate silt deposit and to the influence of water level measurement, more preferred is when using high pressure equipment to wash the installation pipe, and the water pump is assisted in the installation outside of the pipe and draws water, takes out the mixture of inside silt and water, promotes the effect of cleaing away of the intraductal silt of installation.
Further, the upper surface of the sealing end is an inclined plane, the sand discharge hole is formed in the wall of the installation pipe at the lower position of the bottom surface, and the sand discharge hole has the advantages that silt can be conveniently collected to the lower position through the inclined plane, so that the silt can be discharged through the sand discharge hole more easily.
Further inject, still including setting up the protective sleeve in the installation pipe outside, protective sleeve is last from last to being equipped with the second inlet opening down, the joint is fixed between installation pipe and the protective sleeve, and its beneficial part lies in, and the inside and the outside of pipe will be installed to the second inlet opening on the protective sleeve communicates, makes the work that this water level measuring instrument can be normal, and protective sleeve's installation makes this measuring instrument can be applicable to the drilling and does not have the sleeve pipe dado measure, the instrument under the abominable operating mode such as drilling wall ground poor stability is installed and is measured fast, forms better protection to the instrument, the life of extension measuring apparatu.
Further inject, be provided with the switch on control system's the communication module, the switch setting is in the lock incasement, and its beneficial part lies in, when carrying out silt to open-air installation measuring apparatu and washing, can close this communication module's switch, avoids it to send wrong ground water level monitoring data to remote monitoring system, and the purpose of setting in the lock incasement is, can only be operated by appointed staff, avoids other people to destroy and the maloperation.
Further inject, the both sides of first resistance are equipped with insulating stopper, the pressure sensing piece includes the flexure strip of both sides and the rigidity piece of middle part, the width of rigidity piece is greater than the width of first resistance, the conducting layer sets up on the surface of rigidity piece towards first resistance direction, and its beneficial part lies in, when the ground water level is darker, and under hydraulic effect, the flexure strip of both sides produces deformation to first resistance direction, drives conducting layer and the first resistance contact on the rigidity piece of middle part to the switch-on circuit carries out water level measurement, and the more effect of the deformation extrusion force that the flexure strip produced is on the surface of insulating stopper, makes first resistance not receive the too big pressure of pressure sensing piece and leads to its emergence irreversible deformation, and then guarantees water level measurement's accuracy.
The method for calculating the water level of the double-resistor high-precision underground water level measuring instrument further comprises the following specific steps:
(1) let the length of the second resistor be L0Resistance value of R2The current measured by the second current meter is I0The power supply voltage is U0Then, there are: i is0＝U0/R2。
(2) The angle of well deviation (the included angle between the central line of a drilling hole and a plumb line) is alpha (the inclination angle of the central axis of the instrument is consistent with the inclination angle of the well deviation during installation), the length of the first resistor is L, when the water level changes to h height, the pressure sensing sheet is tightly attached to the first resistor under the action of water pressure, so that the length of the upper part of the first resistor is L- (h/cos alpha) and is connected, and the first ammeter measures the current to be I, and at the moment: i is U0/RL-(h/cosα)。
(3) Due to the first resistor and the second resistor U0Equal, so that there are: i is0·R2＝I·RL-(h/cosα)；
Further comprising: rL-(h/cosα)/R2＝I0/I；
Because the sectional areas and the material resistivities of the resistor 1 and the resistor 2 are the same, the following are provided: rL-(h/cosα)/R2＝[L-(h/cosα)]/L0；
The following two formulas are jointly deduced: l- (h/cos α) ═ I0/I)·L0。
(4) When the device is installed, the elevation of the installation hole can be measured (set as H)0) Then, the groundwater level elevation H is derived as:
H＝H0-[L-(h/cosα)]·cosα＝H0-(I0/I)·L0cos α, and the height of the groundwater level at that time can be calculated by substituting the known quantity.
When the borehole is vertical, the well deviation α is 0 °, then cos α is 1, then: h ═ H0-(I0/I)·L0。
The calculation method can be installed in a data acquisition and calculation module of the control system in a program form, and the elevation H of the hole opening in the program is manually modified or written according to specific parameters of an underground water actual measurement point0Angle of inclination α, length L of the second resistor0These known data, in combination with the current I of the second current meter, acquired in real time0And the current I of the first ammeter, so that the height of the underground water level is automatically calculated and measured. The underground water level height of any well deviation can be measured accurately.
The invention has the following technical effects: the invention can realize high-precision measurement of the full-hole depth of the underground water level by a double-resistance current measurement mode, and when the measuring instrument is used for measuring the underground water level, the problem that the measurement precision is influenced due to different underground water flowing states, different underground water turbidities, different mineral compositions and different contents, and the problem of errors caused by single-resistance resistivity changes due to environmental factors such as temperature changes can be avoided. In addition, the measuring instrument has simple structure and low cost, has low requirements on the drilling quality and the stability of the hole wall of the underground water level detecting hole, and is suitable for underground position measurement of any well deviation. And the main measuring parts of the measuring instrument are all drawn to the ground to be distributed, no core part exists underground, the equipment is convenient to maintain and repair, the long-term use of the equipment can be ensured, and the service life is prolonged.
Drawings
Fig. 1 is a partial sectional view showing the overall structure of a water level measuring instrument according to the present embodiment.
Fig. 2 is a schematic diagram of the circuit connection in the water level measuring instrument according to the present embodiment.
Fig. 3 is a schematic view of a bottom cross-section of the installation tube in this embodiment.
Fig. 4 is a schematic sectional front view of the water level measuring instrument according to the present embodiment.
Fig. 5 is a cross-sectional view of a schematic splicing of installation tubes in this embodiment.
Fig. 6 is a schematic horizontal cross-sectional view of the protective sleeve in this embodiment.
The device comprises an installation pipe 1, a first resistor 2, a second resistor 3, a pressure sensing piece 4, a first water inlet hole 5, a sand discharge hole 6, a first ammeter 7, a second ammeter 8, a power supply 9, a cleaning pipe 10, a conducting layer 11, a protection sleeve 12, an installation ground 13, a spring 14, an insulation limiting block 15, a conducting piece 16 and a clamping ring 17.
Detailed Description
The following is further detailed by way of specific embodiments:
as shown in fig. 1, 2, 3 and 4, a specific structure of a dual-resistor high-precision groundwater level measuring instrument mainly comprises a first resistor 2, a second resistor 3, a pressure sensing sheet 4, a first current meter 7, a second current meter 8 and a power supply 9, in this embodiment, the materials, cross-sectional shapes and areas of the first resistor 2 and the second resistor 3 are the same, and the length of the second resistor 3 is known data when being installed, that is, the length of the first resistor 2 connected to a circuit can be calculated by the current value of the power supply 9 flowing through the first resistor 2 and the second resistor 3. And the related numerical values measured by the first ammeter 7 and the second ammeter 8 are transmitted to a data acquisition and calculation module of the control system, and are calculated by combining known parameters, such as orifice elevation, well inclination angle and length of the second resistor, which are input in the control system in advance, so that the corresponding height of the underground water is obtained. And then wirelessly transmitted back to the remote monitoring system through a communication module of the control system. In this embodiment, the specific connection structure is that the first resistor 2 and the pressure sensing plate 4 are installed at an upper position and a lower position, the two ends of the first resistor 2 and the pressure sensing plate 4 are provided with fixing blocks for fixing and installation, and a certain gap is left between the two ends, in this embodiment, the width of the gap is 2-8mm, preferably 4mm, the pressure sensing plate 4 is similar to an elastic sheet, after one side of the pressure sensing plate 4 is pressed by the outside, the elastic sheet will displace towards the other direction, the pressure sensing plate 4 of the pressed part will be in close contact with the first resistor 2 while the displacement occurs, in order to realize the conduction of the pressure sensing plate 4, a conductive layer 11 is arranged on one side of the pressure sensing plate 4 facing the gap, in this embodiment, the conductive layer 11 can be any one of a conductive coating, a conductive wire and a conductive sheet, and it is beneficial that any one of the conductive coating, the conductive wire and the conductive sheet is arranged on the pressure sensing plate 4, the influence on the deformation performance of the pressure sensing piece 4 is small, namely, the pressure sensing piece 4 is deformed by small pressure, and the sensitivity of underground water level monitoring is improved.
As shown in fig. 3, preferably, two sides of the first resistor 2 are provided with insulating stoppers 15, the insulating stoppers 15 are fixed on the side walls of the first mounting groove, the pressure sensing piece 4 includes elastic pieces 4.1 at two sides and a rigid piece 4.2 at the middle part, the width of the rigid piece 4.2 is greater than that of the first resistor, and the rigid piece 4.1 can be bent and deformed in the vertical direction and is rigid in the horizontal direction, similar to a common corrugated plate. The conducting layer 11 sets up on the surface of rigid sheet 4.2 orientation first resistance 2 direction, its beneficial part lies in, when the ground water level is darker, under hydraulic effect, the flexure strip 4.1 of both sides produces deformation to first resistance 2 direction, drive conducting layer 11 and the contact of first resistance 2 on the rigid sheet 4.2 of middle part, thereby the switch-on circuit carries out water level measurement, and the more effect of the deformation extrusion force that flexure strip 4.1 produced is on the surface of insulating stopper 15, make first resistance 2 not receive the too big deformation pressure of pressure sensing piece 4, make it can not take place deformation, guarantee water level measurement's accuracy.
In order to avoid the clearance between pressure sensing piece 4 and the first resistance 2 to intake, influence ground water level measurement accuracy, the both sides of pressure sensing piece 4 can be directly with the integrative seamless installation of the first mounting groove inner wall on the installation pipe 1, adopt the mode of butt fusion in this embodiment, such water-proof effects is better.
The circuit connection relationship of the water level measuring instrument is that, one part is that the positive pole of a power supply 9 is electrically connected with the lower end of a conducting layer 11 through a conducting wire, the negative pole of the power supply 9 is electrically connected with one end of a first resistor 2 positioned above the water surface through a conducting wire, a first current meter 7 is connected in series with the conducting wire connected between the power supply 9 and the conducting layer, and the circuit connection mode of the second part is that a second resistor 3 and a second current meter 8 are connected in series with the positive pole and the negative pole of the power supply 9.
In order to realize protecting the water level measuring instrument, the outer side of the water level measuring instrument is also provided with an installation pipe 1, the installation pipe 1 is provided with first water inlet holes 5 at equal intervals, the wall thickness of the installation pipe 1 is internally provided with a first installation groove and a second installation groove, the inner part and the outer part of the first installation groove and the installation pipe 1 are not communicated, the second installation groove is positioned on the installation pipe 1 and is not communicated with the inner part and the outer part of the installation pipe, a second resistor 3 is fixed at the bottom of the second installation groove, the first resistor and the second resistor are ensured to be positioned in the same environment, the phenomenon that the resistivity of the first resistor and the resistivity of the second resistor are greatly different due to the change of external factors such as temperature is avoided, the first resistor 2 and the pressure sensing piece 4 are installed in the first installation groove, in the embodiment, the pressure sensing piece 4 is directly installed on the inner wall of the installation.
Preferably, can install power 9, first ammeter 7 and second ammeter 8 in this embodiment to ground along the wire guide of arranging in first mounting groove and the second mounting groove, such benefit lies in the installation and the maintenance of the instrument of being convenient for, and can also improve its life simultaneously, and what adopt in this embodiment is that solar cell panel charges the battery, the mode that the battery supplies power to whole circuit guarantees the normal operating of equipment in the field, the wire setting is in first mounting groove and second mounting groove simultaneously, can simplify the complexity of this mounting tube, it is more convenient when the installation, and when many mounting tubes 1 spliced, can set up the tip of wire at the tip of first mounting groove and second mounting groove, also can make the wire splice and communicate when many mounting tubes splice promptly.
Preferably, be equipped with sediment outflow hole 6 in the bottom of installation pipe 1, the upper end of installation pipe 1 is equipped with high pressure cleaning equipment, high pressure cleaning equipment mainly includes water pump and scavenge pipe 10, such benefit lies in, use this water level measuring apparatu for a long time after, silt can enter into in installation pipe 1 through first inlet opening 5, and form silt siltation and deposit, only need pour into the high pressure water downwards from the upper end of installation pipe 1 through high pressure cleaning equipment this moment, the inside silt of installation pipe 1 will be strikeed to the high pressure water, make it discharge through sediment outflow hole 6 and the first inlet opening 5 of bottom, draw water at the instrument outside with the suction pump simultaneously, can deposit sediment after using for a long time outside discharge instrument and the drilling, thereby eliminate silt and deposit the influence to water level measurement. Preferably, the bottom surface of the installation pipe 1 is an inclined surface, and the sand discharge hole 6 is formed in the wall of the installation pipe 1 at a lower position of the bottom surface, so that the silt can be conveniently collected to the lower position of the bottom surface, and can be more easily discharged through the sand discharge hole 6. Preferably, the communication module of the control system is provided with a switch, and the switch is arranged in the lock box, so that the switch of the communication module can be closed when the field installation measuring instrument is subjected to silt flushing, wrong underground water level monitoring data are prevented from being sent to the remote monitoring system, and the switch is arranged in the lock box only for operating by a worker, so that other people are prevented from being damaged and misoperation.
As shown in fig. 6, in order to further improve the practicability and safety of the water level measuring instrument, the water level measuring instrument can adapt to more complicated and severe working conditions such as no casing protection wall measures and poor stability of the wall rock soil of the drilled hole, and can improve the service life of the water level measuring instrument, the protective sleeve 12 outside the installation pipe 1 is provided with second water inlet holes at intervals from top to bottom, and the second water inlet holes communicate the inside and the outside of the installation pipe 1. The connection mode of the installation pipe 1 and the protection sleeve 12 is that the upper end and the lower end inside the protection sleeve 12 are provided with a clamping ring 17, the outer side surface of the clamping ring 17 is circumferentially provided with a welding lug, the welding lug is welded with the inner wall of the protection sleeve, and the installation pipe 1 only needs to be placed in a middle through hole of the clamping ring 17. Preferably, can establish protective rubber gasket layer on the middle part through-hole inner wall of joint ring 17, avoid installation pipe 1 and joint ring 17 rigid contact, can further protect installation pipe 1 the condition that can not appear colliding with and fish tail.
As shown in fig. 5, preferably, the installation pipe 1 can be spliced into a plurality of sections according to the depth of the water level actually measured, in order to ensure the splicing effect, the length of the installation pipe 1, the first resistor 2 and the pressure sensing piece 4 is 2-5m, preferably 5m, the end parts of the adjacent installation pipes 1 are connected by screw threads, after the end parts of the adjacent installation pipes 1 are screwed, the projections of the adjacent first resistors 2 in the vertical direction are overlapped, the screw thread connection part of the adjacent installation pipes 1 is provided with a sealing gasket, the installation pipe 1 at the lowest end is provided with a sealing end, the upper ends of the first resistor 2 and the conducting layer 11 in the installation pipe are respectively provided with a spring 14, the spring 14 is a low-resistivity spring, the purpose is that the resistivity of the first resistor 2 is influenced as little as possible, the lower ends of the first resistor 2 and the conducting layer 11 are respectively provided with a conducting piece 16, and the splicing installation can make the measuring range of the underground water level of the instrument larger, and be convenient for installation and transportation, carry out reasonable setting to the number of teeth of screw thread, after making installation pipe threaded connection, can guarantee first resistance 2, conducting layer 11 and pressure sensing piece 4 can be smooth the concatenation together, after the concatenation simultaneously, will in close contact with between spring 14 and the conducting strip 16, extrude each other simultaneously, guarantee the electrically conductive effect between adjacent first resistance 2 and the conducting layer 11, the sealing washer can prevent that groundwater from passing through the inside that threaded connection department got into first mounting groove and second mounting groove. Meanwhile, in the embodiment, the connection of the wires in each section of the installation pipe 1 during splicing adopts the connection mode between the adjacent first resistors, so that the conductive effect is ensured. And the mode that the upper end of the first resistor is separately provided with the elastic conducting sheet can be adopted, so that the conducting effect after splicing is ensured.
The method for calculating the water level of the double-resistor high-precision underground water level measuring instrument comprises the following steps: (1) let the length of the second resistor be L0Resistance value of R2The current measured by the second current meter is I0The power supply voltage is U0Then, there are: i is0＝U0/R2。
(2) Setting the angle of well deviation (the included angle between the central line of the drilling hole and the plumb line) as alpha, the inclination angle of the central axis of the instrument is consistent with the angle of well deviation when the instrument is installed, the length of the first resistor is L, and when the water level changes to h height, the pressure sensing sheet works due to the water pressureAnd h is tightly attached to the first resistor, so that the part with the length L- (h/cos alpha) on the upper part of the first resistor is connected, and the current measured by the first ammeter is I: i is U0/RL-(h/cosα)。
(3) Due to the first resistor and the second resistor U0Equal, so that there are: i is0·R2＝I·RL-(h/cosα)；
Further comprising: rL-(h/cosα)/R2＝I0/I；
Because the sectional areas and the material resistivities of the resistor 1 and the resistor 2 are the same, the following are provided: rL-(h/cosα)/R2＝[L-(h/cosα)]/L0；
The following two formulas are jointly deduced: l- (h/cos α) ═ I0/I)·L0。
(4) When the device is installed, the elevation of the installation hole can be measured (set as H)0) Then, the groundwater level elevation H is derived as:
H＝H0-[L-(h/cosα)]·cosα＝H0-(I0/I)·L0cos α, and the height of the groundwater level at that time can be calculated by substituting the known quantity.
When the borehole is vertical, the well deviation α is 0 °, then cos α is 1, then: h ═ H0-(I0/I)·L0。
It should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used broadly in the present invention, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. The utility model provides a two resistance high accuracy groundwater level measuring apparatuss, its characterized in that, including being located the ground top first ampere meter, second ampere meter, control system and power, control system contains data acquisition calculation module and communication module, and data acquisition calculation module and communication module electric connection to and set up subaerial first resistance, second resistance, pressure sensing piece and installation pipe, control system's communication module and remote monitoring system wireless connection, the lateral wall of installation pipe is equipped with the inlet opening in vertical direction, be equipped with first mounting groove and second mounting groove on the installation pipe relatively, the material, cross sectional shape and the area of first resistance and second resistance are all the same, the second resistance sets up in the second mounting groove, first resistance and pressure sensing piece are installed in first mounting groove in proper order, and are equipped with the installation clearance between the two, the two sides of the pressure sensing piece are elastically and hermetically connected with the edge of the opening at the inner side of the first mounting groove, when the pressure sensing piece is subjected to external water pressure, the pressed part is bent outwards to deform and is attached to the side surface of the first resistor, and the pressure sensing piece can automatically separate from the first resistor for resetting when the pressure disappears;
one utmost point of power passes through the lower extreme electric connection of wire and conducting layer, another utmost point of power passes through the upper end electric connection of wire and first resistance, first ammeter sets up on the wire between power and conducting layer, second resistance, second ammeter and power form the return circuit, first ammeter and second ammeter and control system's data acquisition calculation module electric connection.
2. A double-resistance high-precision underground water level measuring instrument according to claim 1, wherein the conductive layer is any one of a conductive coating, a conductive wire and a conductive sheet.
3. The double-resistance high-precision underground water level measuring instrument according to claim 1, wherein the power supply, the first ammeter and the connecting wires of the second ammeter are disposed in the first mounting groove and the second mounting groove.
4. The dual-resistor high-precision underground water level measuring instrument as claimed in claim 1, wherein the mounting pipes can be assembled into several segments according to the depth of the actual water level to be measured, the ends of the adjacent mounting pipes are connected by screw threads, and after the ends of the adjacent mounting pipes are screwed, the projections of the adjacent first resistors in the axial direction of the mounting pipes are overlapped, the screw thread connection parts of the adjacent mounting pipes are provided with sealing washers, the mounting pipe at the lowermost end is provided with a sealing end, the upper ends of the first resistors and the upper ends of the conductive layers in the mounting pipes are provided with springs, and the lower ends of the first resistors and the lower ends of the conductive layers are provided with conductive pieces.
5. The double-resistor high-precision underground water level measuring instrument as claimed in claim 1, wherein the bottom of the installation pipe is provided with a sand discharge hole, and the upper end of the installation pipe is provided with a high-pressure cleaning device.
6. A dual-resistance high-precision underground water level measuring instrument according to claim 4, wherein the upper surface of the sealing end is an inclined surface, and the sand discharge hole is formed in the wall of the installation pipe at a lower position of the bottom surface.
7. The underground water level measuring instrument with the double resistors and the high precision as claimed in claim 6, further comprising a protective sleeve arranged outside the mounting tube, wherein the protective sleeve is provided with a second water inlet hole from top to bottom, and the mounting tube and the protective sleeve are clamped and fixed.
8. A dual-resistance high-precision underground water level measuring instrument according to claim 1, wherein the communication module of the control system is provided with a switch, and the switch is arranged in the lock box.
9. The double-resistor high-precision underground water level measuring instrument as claimed in claim 1, wherein the first resistor is provided at both sides thereof with insulating stoppers, the pressure sensing piece comprises elastic pieces at both sides thereof and a rigid piece at a middle portion thereof, the width of the rigid piece is greater than that of the first resistor, and the conductive layer is disposed on a surface of the rigid piece facing the first resistor.
10. The double-resistor high-precision underground water level measuring instrument and the water level calculating method thereof according to any one of claims 1 to 9, characterized by comprising the following steps:
(1) let the length of the second resistor be L0Resistance value of R2The current measured by the second current meter is I0The power supply voltage is U0Then, there are: i is0＝U0/R2。
(2) Setting the angle of well deviation (the included angle between the central line of a drilling hole and a plumb line) as alpha, setting the length of the first resistor as L, and when the water level changes to h height, the pressure sensing sheet clings to the first resistor due to the action of water pressure at the following part of h, so that the part of the upper part of the first resistor, which is L- (h/cos alpha), is connected, and measuring current of the first ammeter is I, and the current is measured by the first ammeter at the moment: i is U0/RL-(h/cosα)。
(3) Due to the first resistor and the second resistor U0Equal, so that there are: i is0·R2＝I·RL-(h/cosα)；
Further comprising: rL-(h/cosα)/R2＝I0/I；
Because the sectional areas and the material resistivities of the resistor 1 and the resistor 2 are the same, the following are provided: rL-(h/cosα)/R2＝[L-(h/cosα)]/L0；
The following two formulas are jointly deduced: l- (h/cos α) ═ I0/I)·L0。
(4) When the device is installed, the elevation of the installation hole can be measured (set as H)0) Then, the groundwater level elevation H is derived as:
H＝H0-[L-(h/cosα)]·cosα＝H0-(I0/I)·L0cos α, and the height of the groundwater level at that time can be calculated by substituting the known quantity.
When the borehole is vertical, the well deviation α is 0 °, then cos α is 1, then: h ═ H0-(I0/I)·L0。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110259176.9A CN113280888B (en) | 2021-03-10 | 2021-03-10 | Double-resistor high-precision underground water level measuring instrument and water level calculating method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110259176.9A CN113280888B (en) | 2021-03-10 | 2021-03-10 | Double-resistor high-precision underground water level measuring instrument and water level calculating method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113280888A true CN113280888A (en) | 2021-08-20 |
| CN113280888B CN113280888B (en) | 2024-07-05 |
Family
ID=77275889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110259176.9A Active CN113280888B (en) | 2021-03-10 | 2021-03-10 | Double-resistor high-precision underground water level measuring instrument and water level calculating method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113280888B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323193A (en) * | 2022-03-14 | 2022-04-12 | 山东省鲁南地质工程勘察院(山东省地质矿产勘查开发局第二地质大队) | Hydrogeological drilling water level monitoring device and method based on radio |
| CN114321369A (en) * | 2021-12-13 | 2022-04-12 | 烟台杰瑞石油服务集团股份有限公司 | Underground working equipment |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060288776A1 (en) * | 2005-06-28 | 2006-12-28 | Keurig, Incorporated | Method and apparatus for sensing liquid level using baseline characteristic |
| CN1900664A (en) * | 2005-07-19 | 2007-01-24 | 南京大学 | Resistance type water level sensor |
| CN201555636U (en) * | 2009-11-24 | 2010-08-18 | 新疆德安环保科技有限公司 | Automatic bus-system water level detector |
| CN202075013U (en) * | 2011-04-29 | 2011-12-14 | 韦永将 | Device for measuring water level |
| CN204694322U (en) * | 2015-04-21 | 2015-10-07 | 山西省交通科学研究院 | A kind of simple and easy deep phreatic water level measuring arrangement |
| CN205228586U (en) * | 2015-12-17 | 2016-05-11 | 中国电建集团北京勘测设计研究院有限公司 | A device for electricity survey ground water level |
| KR200491669Y1 (en) * | 2019-08-30 | 2020-05-15 | 주식회사 다올엔지니어링 | Devcie for measuring underground water level and underground subsidence |
| CN214407668U (en) * | 2021-03-10 | 2021-10-15 | 重庆市地质灾害防治中心 | Water level measuring device |
-
2021
- 2021-03-10 CN CN202110259176.9A patent/CN113280888B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060288776A1 (en) * | 2005-06-28 | 2006-12-28 | Keurig, Incorporated | Method and apparatus for sensing liquid level using baseline characteristic |
| CN1900664A (en) * | 2005-07-19 | 2007-01-24 | 南京大学 | Resistance type water level sensor |
| CN201555636U (en) * | 2009-11-24 | 2010-08-18 | 新疆德安环保科技有限公司 | Automatic bus-system water level detector |
| CN202075013U (en) * | 2011-04-29 | 2011-12-14 | 韦永将 | Device for measuring water level |
| CN204694322U (en) * | 2015-04-21 | 2015-10-07 | 山西省交通科学研究院 | A kind of simple and easy deep phreatic water level measuring arrangement |
| CN205228586U (en) * | 2015-12-17 | 2016-05-11 | 中国电建集团北京勘测设计研究院有限公司 | A device for electricity survey ground water level |
| KR200491669Y1 (en) * | 2019-08-30 | 2020-05-15 | 주식회사 다올엔지니어링 | Devcie for measuring underground water level and underground subsidence |
| CN214407668U (en) * | 2021-03-10 | 2021-10-15 | 重庆市地质灾害防治中心 | Water level measuring device |
Non-Patent Citations (1)
| Title |
|---|
| 任庆海 等: "一体化地下水水位计的设计与实现", 《无线互联科技》, no. 24, 31 December 2020 (2020-12-31), pages 40 - 41 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114321369A (en) * | 2021-12-13 | 2022-04-12 | 烟台杰瑞石油服务集团股份有限公司 | Underground working equipment |
| CN114321369B (en) * | 2021-12-13 | 2024-04-09 | 烟台杰瑞石油服务集团股份有限公司 | Underground working equipment |
| CN114323193A (en) * | 2022-03-14 | 2022-04-12 | 山东省鲁南地质工程勘察院(山东省地质矿产勘查开发局第二地质大队) | Hydrogeological drilling water level monitoring device and method based on radio |
| CN114323193B (en) * | 2022-03-14 | 2022-05-24 | 山东省鲁南地质工程勘察院(山东省地质矿产勘查开发局第二地质大队) | Hydrogeological drilling water level monitoring device and method based on radio |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113280888B (en) | 2024-07-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201396147Y (en) | Detector for subsurface oil-water interface or gas-liquid interface | |
| CN113280888A (en) | Double-resistance high-precision underground water level measuring instrument and water level calculation method thereof | |
| CN105695997A (en) | Safety protection method for underground metal pipeline | |
| CN105156095B (en) | Single-electrode current type detection method for coating in underground oil casing | |
| CN102021584A (en) | Pipe transmission oriented cathode protection system | |
| CN105424293A (en) | Water supply-drainage pipe leak detection system and detection method | |
| CN214407668U (en) | Water level measuring device | |
| CN214748288U (en) | Water level measuring device | |
| CN201662525U (en) | Cathode protection monitoring probe and cathode protection monitoring probe monitoring system | |
| CN106197605A (en) | Oil-water interfaces detecting system and the method in chamber is made for salt hole air reserved storeroom | |
| CN110079811A (en) | A kind of cathodic protection of pipe string of oil-water well underground and on-line corrosion monitoring device and method | |
| CN205175626U (en) | Water supply and drainage pipe leak testing system | |
| CN104459093A (en) | Chloride ion concentration detection device of reinforced concrete structure and nondestructive testing method thereof | |
| CN206862331U (en) | Geology internal displacement three-dimension monitor system | |
| CN205445579U (en) | Flow monitoring device of intelligent water distributor of integrated vortex shedding flowmeter | |
| CN105239995B (en) | Three-electrode potential difference type detection method for coating in underground oil casing | |
| CN207420504U (en) | A kind of Multi-parameter Combined Tool logging device | |
| CN207147550U (en) | A kind of new Dam Safety Monitoring Automation measure and control device | |
| CN106121570A (en) | Down-hole annular flow electromagnetic measurement apparatus and measuring method | |
| CN205027412U (en) | Oil -water interface detector in pit | |
| CN113417627B (en) | Measuring method for quality of outer coating of oilfield casing | |
| CN203514179U (en) | Intelligent pot bearing | |
| CN208685060U (en) | A kind of polarized probe | |
| CN107782285B (en) | Waterproof tensile portable inclinometer probe | |
| CN214843702U (en) | Pipeline gas metering instrument convenient to install for oil well |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |