CN211178651U - Groundwater water level measuring device - Google Patents

Groundwater water level measuring device Download PDF

Info

Publication number
CN211178651U
CN211178651U CN201922342688.2U CN201922342688U CN211178651U CN 211178651 U CN211178651 U CN 211178651U CN 201922342688 U CN201922342688 U CN 201922342688U CN 211178651 U CN211178651 U CN 211178651U
Authority
CN
China
Prior art keywords
wire
sleeve
wheel
fixed
measuring device
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.)
Active
Application number
CN201922342688.2U
Other languages
Chinese (zh)
Inventor
贾小军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201922342688.2U priority Critical patent/CN211178651U/en
Application granted granted Critical
Publication of CN211178651U publication Critical patent/CN211178651U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

The utility model particularly relates to an underground water level measurement device belongs to water level observation technical field, and the problem that solve provides one kind can effectually prevent the underground water level measurement device of humidity influence in the well, and the scheme of adoption is: the bracket is fixed above a drill hole, a sleeve and an inner cylinder are coaxially arranged in the drill hole, the sleeve can rotate relative to the bracket, a rotation driving part is connected onto the sleeve, the upper part of the inner cylinder is fixed with the bracket, a plurality of water inlet and outlet through holes are formed in the cylinder wall of the lower part of the sleeve and the cylinder wall of the lower part of the inner cylinder, two wire cylinders are symmetrically and vertically fixed in the upper port of the inner cylinder, two wires are led out from an ammeter, the two wires penetrate through the wire cylinders on the same side and extend to the lower part of the inner cylinder, an insulating block is fixed on the lower part of each wire; the utility model discloses a sleeve and inner tube avoid the influence of humidity to the wire down.

Description

Groundwater water level measuring device
Technical Field
The utility model belongs to the technical field of the water level is surveyd, concretely relates to groundwater water level measuring device.
Background
The water resource is one of the natural environment factors which are relied on by human beings for survival and development, and is an important component forming an ecological system, the underground water is used as an important water body on the earth, the water quantity is stable, the water quality is good, the underground water is one of the important water sources of agricultural irrigation, industrial and mining and cities, and has close relationship with human society, and in a wide area in the north of China, the underground water accounts for more than 80 percent of the total water supply quantity of all domestic water. Due to long-term overload mining, most areas in the north of China are in an underground water over-mining state, and parts of the areas are in a serious over-mining state. The underground water is exploited in excess for a long time, so that a series of geological environment problems such as great reduction of underground water level, drainage of aquifers, regional underground water level falling funnels and the like are caused, and geological disasters such as ground settlement, ground cracks, karst collapse and the like occur. In order to scientifically and effectively protect and utilize groundwater resources, reasonably develop and utilize groundwater better and solve the groundwater water demand, the groundwater level needs to be measured.
The traditional measuring equipment mostly adopts a measuring rope, and water level judgment is carried out according to the sound of the contact water surface of objects such as small stones hung at the tail end of the measuring rope, and the method has the following defects: the method comprises the following steps of judging that the position of the water surface has great subjectivity according to the sound of the contact of an object hung at the tail end of a measuring rope with the water surface, judging different horizontal plane positions by different people, and frequently not hearing the sound of the contact of a stone hung on the measuring rope with the water surface in a region with large noise to cause misjudgment; and the induction measuring method is time-saving, labor-saving, convenient and efficient, but has the problems of large measuring error and high cost.
The underground water level is measured to current reconnaissance drilling adopts two electric wires of winding around the measuring rope usually, utilizes quality of water electric conductivity, and one end is connected in the ampere meter, and the other end forms the gauge head part, and when measuring the water level, the measuring head is transferred to underground water level, can form the passageway, and the ampere meter pointer takes place to rotate. However, the humidity in the well is high, water drops exist on the well wall, a closed loop alarm is easy to form, and measurement data errors are caused.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes prior art exists not enough, provides an underground water level measuring device, can effectually prevent the great and influence of the drop of water of the wall of a well of humidity in the well, the influence of avoiding humidity in the well forms closed loop and leads to the measured data mistake.
In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides an underground water level measuring device, is provided with vertical drilling on the dirt bed, drilling and groundwater layer intercommunication, underground water level measuring device includes: the device comprises a support, an ammeter, a wire, an inner cylinder, a sleeve, a wire cylinder, an insulating block and a rotation driving part, wherein the support is fixed above a drill hole, the sleeve and the inner cylinder are coaxially arranged in the drill hole, the sleeve is sleeved outside the inner cylinder, the upper end of the sleeve is open, the lower end of the sleeve is closed, the upper part of the sleeve is connected with the support, the sleeve can rotate relative to the support, the rotation driving part is connected onto the sleeve, the lower part of the sleeve extends into the underground water layer, a plurality of water inlet and outlet through holes are formed in the cylinder wall of the lower part of the sleeve, the upper end and the lower end of the inner cylinder are both open, the upper part of the inner cylinder is fixed with the support, the lower part of the inner cylinder extends into the underground water layer, a plurality of water inlet and outlet through holes are formed in the cylinder wall of the lower part of the inner, the ammeter is fixed with the support, two leads are led out of the ammeter, the two leads penetrate through the lead cylinder on the same side and extend to the lower portion of the inner cylinder, the lead cylinder is used for limiting the position of the leads and enabling the leads to be in a vertically downward state, the lower portion of the leads is fixed with the insulating block, the lower end of the leads extends out of the insulating block, the insulating block is used for enabling the leads to be in a vertically downward state, misjudgment caused by signals of the ammeter due to the fact that the two leads are in contact due to other reasons is avoided, and when the lower end of the lead extending out of the insulating block is in contact with underground water, signals are generated by the ammeter.
The insulating block is a cylinder with the diameter smaller than that of the inner cylinder, two symmetrical wire holes are vertically formed in the insulating block, and the wires penetrate through the wire holes and are fixed with the wire holes.
The sleeve does the wire provides the less space of humidity, can effectually prevent because the great and wall of a well of humidity of well has the drop of water, easily forms closed circuit's problem, telescopic slow rotation can avoid the inlet opening of its lower part to block up because of impurity, be provided with relatively in the sleeve the support is fixed the inner tube avoids telescopic rotation influences the vertical state of wire and lead to the return circuit intercommunication, the inner tube compare in the inside further drying of sleeve avoids secret humidity's influence.
The rotary driving part comprises a worm, a worm wheel and a driving motor, the worm wheel is coaxially sleeved on the upper portion of the sleeve, the sleeve is fixed to the worm wheel, the worm wheel is provided with the worm matched with the worm, the worm is coaxially fixed to an output shaft of the driving motor, and the driving motor is opposite to the support and fixed.
The groundwater level measuring device further includes: the wire feeding device comprises two wire wheels, two wire feeding wheels and a meter counter sensor, wherein the two wire wheels are symmetrically arranged above a drill hole, the wire wheels can rotate relative to a support, two wires led out from an ammeter are wound on the wire wheels and are uncoiled by the rotation of the wire wheels for output, the wire feeding wheels can rotate relative to the support, one side of each wire feeding wheel is provided with the meter counter sensor, the meter counter sensor is fixed relative to the support, the wire feeding wheels are matched with the meter counter sensor, one wire passes through the wire feeding wheels and the meter counter sensor, and the meter counter sensor is used for calculating the length of the wire.
The bearing is coaxially sleeved on the outer side of the upper portion of the sleeve, the sleeve is fixed to the inner wall of the bearing, and the outer portion of the bearing is fixed to the support.
The inner barrel is divided into a plurality of sections, the inner barrel is provided with a plurality of water inlet and outlet through holes, the inner barrel is provided with internal threads and external threads which are matched with each other at two ends of the inner barrel, and the inner barrels are sequentially connected through the internal threads and the external threads.
The sleeve on the upper part of the barrel wall provided with a plurality of water inlet and outlet through holes is divided into a plurality of sections, two ends of the plurality of sections of sleeve are provided with matched internal threads and external threads, and the plurality of sections of sleeve are sequentially connected through the internal threads and the external threads.
The wire wheel is provided with a wire wheel motor, the wire wheel is coaxially fixed with an output shaft of the wire wheel motor, and the wire wheel motor is fixed with the support.
The wire feeding wheel is provided with a wire feeding wheel motor, the wire feeding wheel is coaxially fixed with an output shaft of the wire feeding wheel motor, and the wire feeding wheel motor is fixed with the support.
Guide wheels are arranged above the wire guide cylinders and can rotate relative to the support, and the wires on the same side pass around the guide wheels and vertically enter the wire guide cylinders.
The guide wheel is connected with the support bearing.
The using method comprises the following steps: two wires are wound on the wire wheels which are symmetrically arranged, one end of each wire is connected with an ammeter and does not rotate along with the rotation of the wire wheels, the other end of each wire is uncoiled by the rotation of the wire wheels for output, the two wires are guided by guide wheels and then vertically enter the wire guide drum, then penetrate through a wire guide hole of the insulating block and are fixed, the multiple sections of sleeves are connected and input into a drill hole, a driving motor is started, the sleeves rotate, the inner drum is fixed, the wire wheel motor is started, and when the ammeter generates a signal, the length of each wire is checked; one of the leads passes through the space between the wire conveying wheel and the meter counter sensor, and the meter counter sensor is used for calculating the length of the lead, so that the underground water level can be conveniently measured.
Compared with the prior art, the utility model following beneficial effect has.
One, the utility model discloses a sleeve provides the less space of humidity for the wire, can effectually prevent because the great and wall of a well of humidity has the drop of water, easily forms the problem in closed return circuit in the well, telescopic slow rotation can avoid the inlet opening of its lower part because impurity blocks up, is provided with the fixed inner tube of relative support in the sleeve, avoids telescopic rotation to influence the vertical state of wire and leads to the return circuit intercommunication, and the inner tube is compared in the inside further drying of sleeve, avoids secret humidity's influence.
Two, one of them wire is followed defeated line wheel with pass between the meter rice ware sensor, meter rice ware sensor is used for calculating the length of wire makes things convenient for the measurement of groundwater level.
Thirdly, the utility model discloses a sleeve and inner tube all set up to the multisection, and the sleeve at middle part and inner tube both ends all are provided with matched with internal thread and external screw thread, multisection the sleeve connects gradually, easy to assemble through internal thread and external screw thread.
Drawings
The present invention will be further described with reference to the accompanying drawings.
Fig. 1 is the structure schematic diagram of the groundwater level measuring device of the utility model.
Fig. 2 is a sectional view of the plane a-a of the groundwater level measuring device of the present invention.
Fig. 3 is a schematic structural diagram of the insulating block of the present invention.
Fig. 4 is a schematic structural view of the sleeve of the present invention.
Fig. 5 is a schematic structural view of the inner tube of the present invention.
In the figure: the device comprises an ammeter 1, a wire wheel 2, a meter counter sensor 3, a wire conveying wheel 4, a guide wheel 5, a soil layer 6, a groundwater layer 7, an inner cylinder 8, a sleeve 9, a wire guide cylinder 10, a worm 11, a worm wheel 12, an insulating block 13, a wire guide hole 14, a wire 15 and a drill hole 16.
Detailed Description
The following is a further description with reference to specific examples.
The utility model provides an underground water level measuring device, is provided with vertical drilling 16 on soil layer 6, drilling 16 and groundwater layer 7 intercommunication, underground water level measuring device includes: the device comprises a support, an ammeter 1, a wire 15, an inner cylinder 8, a sleeve 9, a wire cylinder 10, an insulating block 13 and a rotation driving part, wherein the support is fixed above a drill hole 16, the sleeve 9 and the inner cylinder 8 are coaxially arranged in the drill hole 16, the sleeve 9 is sleeved outside the inner cylinder 8, the upper end of the sleeve 9 is open, the lower end of the sleeve 9 is closed, the upper part of the sleeve 9 is connected with the support, the sleeve 9 can rotate relative to the support, the rotation driving part is connected onto the sleeve 9, the lower part of the sleeve 9 extends into an underground water layer 7, a plurality of water inlet and outlet through holes are arranged on the cylinder wall of the lower part of the sleeve 9, the upper end and the lower end of the inner cylinder 8 are both open, the upper part of the inner cylinder 8 is fixed with the support, the lower part of the inner cylinder 8 extends into the underground water layer 7, a plurality of water inlet and outlet through, two wire guide cylinders 10 are symmetrically and vertically fixed in an upper port of the inner cylinder 8, the ammeter 1 is fixed with the bracket, two lead wires 15 are led out from the ammeter 1, the two lead wires 15 penetrate through the lead wire cylinder 10 at the same side and extend to the lower part of the inner cylinder 8, the wire guide cylinder 10 is used for limiting the position of the wire 15, enabling the wire 15 to be in a vertically downward state, the lower part of the lead 15 is fixed with the insulating block 13, the lower end of the lead 15 extends out of the insulating block 13, the insulating block 13 is used for enabling the conducting wires 15 to be in a vertically downward state, so as to avoid the erroneous judgment caused by the signal of the ammeter 1 due to the contact of the two conducting wires 15 caused by other reasons, when the lower end of the wire 15 extending out of the insulating block 13 contacts the ground water, a signal is generated from the ammeter 1.
The insulating block 13 is a cylinder with a diameter smaller than that of the inner cylinder 8, two symmetrical wire holes 14 are vertically arranged on the insulating block 13, and the wires 15 penetrate through the wire holes 14 and are fixed with the wire holes 14.
Sleeve 9 does wire 15 provides the less space of humidity, can effectually prevent because the great and wall of a well of humidity of well has the drop of water, easily forms closed circuit's problem, sleeve 9's slow rotation can avoid the inlet opening of its lower part because impurity blocks up, be provided with in the sleeve 9 relatively the support is fixed inner tube 8 avoids sleeve 9's rotation influence wire 15's vertical state and lead to the return circuit intercommunication, inner tube 8 compare in sleeve 9 is inside further dry, avoids secret humidity's influence.
The rotary driving part comprises a worm 11, a worm wheel 12 and a driving motor, the worm wheel 12 is coaxially sleeved on the upper portion of the sleeve 9, the worm wheel 12 is provided with the worm 11 matched with the worm wheel 12, the worm 11 is coaxially fixed with an output shaft of the driving motor, and the driving motor is fixed relative to the support.
The groundwater level measuring device further includes: the wire wheel 2, the wire conveying wheel 4 and the meter sensor 3, the wire wheel 2 is two, two wire wheels 2 are symmetrically arranged above the drill hole 16, the wire wheel 2 can rotate relative to the support, two wires 15 led out from the ammeter 1 are wound on the wire wheel 2 and are uncoiled and output by the rotation of the wire wheel 2, the wire conveying wheel 4 can rotate relative to the support, the meter sensor 3 is arranged on one side of the wire conveying wheel 4, the meter sensor 3 is fixed relative to the support, the wire conveying wheel 4 is matched with the meter sensor 3, one wire 15 penetrates through the space between the wire conveying wheel 4 and the meter sensor 3, and the meter sensor 3 is used for calculating the length of the wire 15.
The upper outer side of the sleeve 9 is connected with the bracket bearing.
The inner barrel 8 arranged on the upper part of the barrel wall and provided with a plurality of water inlet and outlet through holes is divided into a plurality of sections, two ends of the inner barrel 8 in the plurality of sections are provided with internal threads and external threads which are matched with each other, and the inner barrel 8 in the plurality of sections are sequentially connected through the internal threads and the external threads.
The sleeve 9 arranged at the upper part of the plurality of water inlet and outlet through holes on the cylinder wall is divided into a plurality of sections, two ends of the plurality of sections of the sleeve 9 are provided with internal threads and external threads which are matched, and the plurality of sections of the sleeve 9 are sequentially connected through the internal threads and the external threads.
The wire wheel 2 is provided with a wire wheel motor, the wire wheel 2 is coaxially fixed with an output shaft of the wire wheel motor, and the wire wheel motor is fixed with the support.
The wire feeding wheel 4 is provided with a wire feeding wheel motor, the wire feeding wheel 4 is coaxially fixed with an output shaft of the wire feeding wheel motor, and the wire feeding wheel motor is fixed with the support.
Guide wheels 5 are arranged above the wire guide drums 10, the guide wheels 5 can rotate relative to the supports, and the wires 15 on the same side vertically enter the wire guide drums 10 by bypassing the guide wheels 5.
The guide wheel 5 is connected with the bracket bearing.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. It will be apparent to those skilled in the art that modifications and improvements can be made to the above-described embodiments without departing from the spirit and scope of the invention. Accordingly, it will be appreciated that those skilled in the art, upon attaining an understanding of the foregoing may readily produce alterations to, variations of, and equivalents to these embodiments without departing from the spirit and scope of the present invention as defined by the appended claims.

Claims (10)

1. The utility model provides an underground water level measuring device is provided with vertical drilling (16) on dirt bed (6), drilling (16) and groundwater layer (7) intercommunication, its characterized in that, underground water level measuring device includes: the device comprises a support, an ammeter (1), a wire (15), an inner cylinder (8), a sleeve (9), a wire cylinder (10), an insulating block (13) and a rotation driving part, wherein the support is fixed above a drill hole (16), the sleeve (9) and the inner cylinder (8) are coaxially arranged in the drill hole (16), the upper end of the sleeve (9) is open, the lower end of the sleeve (9) is closed, the upper part of the sleeve (9) is connected with the support, the sleeve (9) can rotate relative to the support, the rotation driving part is connected onto the sleeve (9), the lower part of the sleeve (9) extends into an underground water layer (7), a plurality of water inlet and outlet through holes are formed in the cylinder wall of the lower part of the sleeve (9), the upper end and the lower end of the inner cylinder (8) are both open, the upper part of the inner cylinder (8) is fixed with the support, and the lower part of the inner cylinder (8) extends into the underground water layer, the wall of the lower portion of the inner barrel (8) is provided with a plurality of water inlet and outlet through holes, two wire barrels (10) are symmetrically and vertically fixed in the upper end opening of the inner barrel (8), the ammeter (1) is fixed with the support, two wires (15) are led out from the ammeter (1), the two wires (15) penetrate through the wire barrels (10) on the same side and extend to the lower portion of the inner barrel (8), the lower portion of each wire (15) is fixed with an insulating block (13), and the lower end of each wire (15) extends out of the insulating block (13).
2. The groundwater level measuring device according to claim 1, wherein the rotary driving component comprises a worm (11), a worm wheel (12) and a driving motor, the worm wheel (12) is coaxially sleeved on the upper portion of the sleeve (9), the worm (11) matched with the worm wheel (12) is arranged on the worm wheel (12), the worm (11) and an output shaft of the driving motor are coaxially fixed, and the driving motor is fixed relative to the bracket.
3. A groundwater level measuring device according to claim 1 or 2, further comprising: the wire feeding device comprises two wire wheels (2), two wire conveying wheels (4) and a meter counter sensor (3), wherein the two wire wheels (2) are symmetrically arranged above the drill hole (16), the wire wheel (2) can rotate relative to the bracket, two wires (15) led out from the ammeter (1) are wound on the wire wheel (2) and are uncoiled by the wire wheel (2) to be output, the thread conveying wheel (4) can rotate relative to the support, one side of the thread conveying wheel (4) is provided with the meter counter sensor (3), the meter counter sensor (3) is fixed relative to the bracket, the thread conveying wheel (4) is matched with the meter counter sensor (3), one of the wires (15) passes through between the thread conveying wheel (4) and the meter counter sensor (3), the meter counter sensor (3) is used for calculating the length of the wire (15).
4. A groundwater level measuring device as claimed in claim 3, characterised in that the upper outer side of the sleeve (9) is connected to the bracket via a bearing.
5. The groundwater level measuring device as claimed in claim 4, wherein the inner cylinder (8) at the upper part of the cylinder wall provided with a plurality of water inlet and outlet through holes is divided into a plurality of sections, both ends of the inner cylinder (8) are provided with internal threads and external threads which are matched with each other, and the inner cylinders (8) are sequentially connected through the internal threads and the external threads.
6. The groundwater level measuring device as claimed in claim 5, wherein the sleeve (9) having a plurality of water inlet and outlet holes on the wall is divided into a plurality of sections, the two ends of the plurality of sections of the sleeve (9) are provided with internal and external threads which are engaged with each other, and the plurality of sections of the sleeve (9) are sequentially connected through the internal and external threads.
7. The groundwater water level measuring device of claim 6, wherein a reel motor is arranged on the reel (2), the reel (2) is coaxially fixed with an output shaft of the reel motor, and the reel motor is fixed with the bracket.
8. An underground water level measuring device according to claim 7, characterized in that a wire feeding wheel motor is arranged on the wire feeding wheel (4), the wire feeding wheel (4) is coaxially fixed with the output shaft of the wire feeding wheel motor, and the wire feeding wheel motor is fixed with the bracket.
9. An underground water level measuring device according to claim 8, characterized in that a guide wheel (5) is arranged above the wire guide cylinder (10), the guide wheels (5) can rotate relative to the bracket, and the wires (15) on the same side pass around the guide wheels (5) and vertically enter the wire guide cylinder (10).
10. An underground water level measuring device according to claim 9, characterized in that the guide wheel (5) is connected with the bracket bearing.
CN201922342688.2U 2019-12-24 2019-12-24 Groundwater water level measuring device Active CN211178651U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201922342688.2U CN211178651U (en) 2019-12-24 2019-12-24 Groundwater water level measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201922342688.2U CN211178651U (en) 2019-12-24 2019-12-24 Groundwater water level measuring device

Publications (1)

Publication Number Publication Date
CN211178651U true CN211178651U (en) 2020-08-04

Family

ID=71825397

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201922342688.2U Active CN211178651U (en) 2019-12-24 2019-12-24 Groundwater water level measuring device

Country Status (1)

Country Link
CN (1) CN211178651U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112146723A (en) * 2020-11-25 2020-12-29 潍坊红象网络科技有限公司 Hydrogeological exploration ground water level observation device
CN114076626A (en) * 2021-11-18 2022-02-22 贵州省水利水电勘测设计研究院有限公司 Underground water level measuring device and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112146723A (en) * 2020-11-25 2020-12-29 潍坊红象网络科技有限公司 Hydrogeological exploration ground water level observation device
CN114076626A (en) * 2021-11-18 2022-02-22 贵州省水利水电勘测设计研究院有限公司 Underground water level measuring device and method

Similar Documents

Publication Publication Date Title
CN211178651U (en) Groundwater water level measuring device
CN105547369B (en) A kind of groundwater velocity and direction single hole measurement apparatus
CN207675758U (en) A kind of soil moisture layering quick test device
CN205809059U (en) A kind of soil humidity detector
CN203672368U (en) Automatic acquisition device for clinometer data
CN202441370U (en) Logging while drilling azimuth gamma detection instrument
CN205642541U (en) Ground water level measures sample thief
CN211178652U (en) Underground water level measuring device capable of preventing humidity influence
CN206430933U (en) A kind of device for detecting P in soil H values
CN209198670U (en) A kind of directional tool probe type orientation gamma inserting tube
CN209085721U (en) A kind of multi-layer underground water level observation device
CN203365043U (en) Osmometer
CN104035055B (en) A kind of high sensitivity magnetic field sensor for oil well logging
CN105180961A (en) Sliding small-diameter pipeline track measuring instrument with pipe orifice distance metering function
CN206144551U (en) Water pressure test in borehole system
CN202250032U (en) Water flow logging instrument
CN209372480U (en) Level measuring device for fetching water
CN206208339U (en) A kind of device for monitoring groundwater level
CN208188032U (en) Tubular type TDR soil moisture sensor
CN204924259U (en) Mouth of pipe is had records of distance by log and is coasted formula narrow tube way orbit measuring apparatu
CN206223147U (en) A kind of deformation of deep excavation monitoring alarm
CN205449979U (en) Survey depressimeter from moisturizing formula electricity
CN203441482U (en) Single-electrode power supply bottom-installation electrode system
CN208506026U (en) The water quality monitoring equipment of body of groundwater is not disturbed
CN210862979U (en) Underground temperature measuring instrument

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant