CN108709606A - SEA LEVEL VARIATION rate devices and its test method in a kind of quick tested for leaks water cofferdam - Google Patents
SEA LEVEL VARIATION rate devices and its test method in a kind of quick tested for leaks water cofferdam Download PDFInfo
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- CN108709606A CN108709606A CN201811054133.1A CN201811054133A CN108709606A CN 108709606 A CN108709606 A CN 108709606A CN 201811054133 A CN201811054133 A CN 201811054133A CN 108709606 A CN108709606 A CN 108709606A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 238000010998 test method Methods 0.000 title claims abstract description 11
- 238000006073 displacement reaction Methods 0.000 claims abstract description 41
- 238000007667 floating Methods 0.000 claims abstract description 22
- 238000012360 testing method Methods 0.000 claims description 20
- 239000007787 solid Substances 0.000 claims description 5
- 238000002474 experimental method Methods 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000013101 initial test Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013439 planning Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
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- 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
- G01F23/30—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 floats
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
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- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses SEA LEVEL VARIATION rate devices and its test methods in a kind of quick tested for leaks water cofferdam, are related to water-level observation measurement technology field.SEA LEVEL VARIATION rate devices in the quick tested for leaks water cofferdam, including fixed frame, floating drum, displacement sensor and displacement data acquisition system, floating drum includes kickboard and cylinder, and kickboard is movably set in cylinder and along the inner wall sliding motion of cylinder, and cylinder is installed in the bottom of fixed frame；Displacement sensor includes sensor body and telescopic rod, sensor body is mounted on fixed frame, telescopic rod activity is fastened in sensor body and along the inner wall sliding motion of sensor body, the one end of telescopic rod far from sensor body abuts kickboard, and the one end of sensor body far from telescopic rod connects displacement data collecting system.SEA LEVEL VARIATION rate devices and its test method in the quick tested for leaks water cofferdam of the present invention, can quickly, accurately SEA LEVEL VARIATION rate in tested for leaks water cofferdam, measuring accuracy be up to 0.01mm, convenient and efficient.
Description
Technical field
The present invention relates to be related to water-level observation measurement technology field, and in particular to a kind of quick tested for leaks water cofferdam Nei Shui
Position rate of change device and its test method.
Background technology
Water level prediction and human society life and the relations of production are close.Planning, design, construction and the management of hydraulic engineering need
Want water level prediction.Hydrologic forecast and hydrographic message generally are being met to the water stage measurement of observation object using water gauge and water-level gauge
On the basis of it is required that, according to observation purpose and require to select corresponding observation time and observing frequency.
Cofferdam refers in hydraulic engineering construction, to build permanent water conservancy projects, the provisional building enclosure built.Its
Effect is to prevent water and soil from building position into building, so that in cofferdam internal drainage, excavation pit builds building.One
As be mainly used in waterwork, except as formal building a part in addition to, cofferdam is generally removed after being finished.Cofferdam height
Higher than the peak level being likely to occur in the construction time.The effect in cofferdam not only can with waterproof, enclose water, but also the hole of foundation pit can be supported
Wall.In bridge foundation construction, when bridge pier, stylobate plinth are located at earth's surface water level or less, in conjunction with the practical hydrology of construction site
Geological condition selects corresponding cofferdam form.
Sometimes used cofferdam form is improper or construction site occurs big variation and cofferdam structure is made to change, and leads
It causes percolating water situation occur in cofferdam, the variation feelings by observing water level in cofferdam is needed before adopting remedial measures for the situation
Condition studies the rate of percolating water, it is ensured that construction safety；Or when being drawn water to the cofferdam of full water using water pump, pass through
The situation of change of rapid scan water level assesses effect of drawing water, and reduces unnecessary economic loss.It at this time can quick tested for leaks water
SEA LEVEL VARIATION rate is particularly important in cofferdam.
At present using in the tested for leaks water cofferdam such as steel ruler water-level gauge floodometer, electric water level gauge or indicator water gage
SEA LEVEL VARIATION rate.Steel ruler water-level gauge floodometer is by manually reading the height of the water level in formal testing percolating water cofferdam
Journey, error is big and is not suitable for quickly continuous collection data；Electric water level gauge is scaled head height progress by testing hydraulic pressure
Water level calculates, and water quality also has test result certain influence, low so as to cause measuring accuracy.Indicator water gage can be tested quickly
SEA LEVEL VARIATION rate in percolating water cofferdam, but instrument and equipment heaviness is expensive, not portable, measuring accuracy is low also relatively low.
Invention content
In view of the above-mentioned problems, it is necessary to provide SEA LEVEL VARIATION rate devices and its surveys in a kind of quick tested for leaks water cofferdam
Method for testing.SEA LEVEL VARIATION rate devices and its test method in the quick tested for leaks water cofferdam, can quickly, accurately test
The precision of SEA LEVEL VARIATION rate in percolating water cofferdam, test may be up to 0.01mm, convenient and efficient.
To achieve the goals above, the technical solution adopted by the present invention is as follows：
SEA LEVEL VARIATION rate devices in a kind of quick tested for leaks water cofferdam, including fixed frame, floating drum, several displacement sensings
Device and displacement data acquisition system, the floating drum include kickboard and cylinder, and the kickboard is movably set in the cylinder and can
Along the inner wall sliding motion of the cylinder, the cylinder is installed in the bottom of the fixed frame；Each institute's displacement sensors point
Not Bao Kuo sensor body and telescopic rod, the sensor body be mounted on the fixed frame on, the telescopic rod activity is fastened on institute
It states in sensor body and along the inner wall sliding motion of the sensor body, the one end of the telescopic rod far from the sensor body is supported
The kickboard is connect, the displacement data acquisition system is installed in outside the fixed frame, and each sensor body is stretched far from described
One end of contracting bar is separately connected the displacement data acquisition system.
Preferably, each sensor body is installed in by a fixed link on the fixed frame respectively.
Preferably, each sensor body is fixed on by way of binding respectively in each fixed link, each
A lock is installed in the fixed link, each fixed link passes through the detachably connected fixation of lock respectively
Frame.
Preferably, each one end of the sensor body far from the telescopic rod passes through cable connection institute shift number respectively
According to acquisition system.
Preferably, the floating drum further includes several columns, and several column intervals are installed in the outer wall of the cylinder, institute
State the bottom that cylinder is fixedly connected with the fixed frame by several columns.
Preferably, the opposite end in the cylinder is equipped with limited block.
Preferably, the overall diameter of the cylinder is set as 20~30cm, is highly set as 20~30cm.
Preferably, the diameter of the kickboard is set as 18~28cm, is highly set as 2~4cm.
Preferably, the fixed frame includes hanging ring, brace, two fixed rings and several montants, and two fixed rings are flat
Row setting is simultaneously connected by several montants, and the free terminal of several montants is respectively fixedly connected with the cylinder, described
Hanging ring connects the fixed ring far from described cylinder one end by the brace.
The test method of SEA LEVEL VARIATION rate devices, includes the following steps in a kind of quick tested for leaks water cofferdam：
(1) each sensor body is bound respectively in each fixed link first, it then will be each described solid
Fixed pole connects the fixed frame by the lock, and will connect the other end connection of the cable of each sensor body
The displacement data acquisition system；
(2) before being tested, the floating drum is navigated to by the initial testing water surface by the hanging ring using fixed rope, when
The floating drum is fixed after reaching the test water surface；
(3) it checks all appts equipment, carries out testing preceding debugging, it is ensured that instrument and equipment energy normal operation；
(4) it returns to zero to institute's displacement sensors, sets frequency acquisition, start to acquire test period-curves of water level；
(5) terminate experiment, finishing analysis is carried out to data.
Due to the adoption of the above technical scheme, the invention has the advantages that：
SEA LEVEL VARIATION rate devices and its test method in quick tested for leaks water cofferdam provided by the invention, abundant
Using being developed on the basis of high-precision displacement sensor, the buoyancy of water, displacement data acquisition system etc..It, will be whole when experiment
A floating drum is placed in test water surface site, and when being risen using water level, the buoyancy of water pushes the kickboard in device to rise and is transmitted to
The high accuracy displacement sensor being fixed on fixed frame makes it generate stroke variation, and displacement data acquisition system is to water level
Data carry out acquisition storage in real time.On the basis of ensureing that precision is met the requirements, data supporting is provided for subsequent related measure,
Ensure construction safety.
SEA LEVEL VARIATION rate devices and its test method in quick tested for leaks water cofferdam provided by the invention, can quickly,
Accurately SEA LEVEL VARIATION rate in tested for leaks water cofferdam, to assess SEA LEVEL VARIATION to work influences degree such as constructions.
In the instrument of the present invention, the variation of water level passes to high accuracy displacement sensor by kickboard and is measured in real time, test
Precision may be up to 0.01mm, convenient and efficient.
Description of the drawings
Fig. 1 is that the structure of SEA LEVEL VARIATION rate devices in the quick tested for leaks water cofferdam of embodiment of the present invention offer is shown
It is intended to；
Fig. 2 is the fixation in SEA LEVEL VARIATION rate devices in the quick tested for leaks water cofferdam of embodiment of the present invention offer
The structural schematic diagram of frame；
Fig. 3 is the floating drum in SEA LEVEL VARIATION rate devices in the quick tested for leaks water cofferdam of embodiment of the present invention offer
Sectional view；
Fig. 4 is the displacement in SEA LEVEL VARIATION rate devices in the quick tested for leaks water cofferdam of embodiment of the present invention offer
The structural schematic diagram of sensor.
In attached drawing, 1- fixed frames, 11- hanging rings, 12- braces, 13- fixed rings, 14- montants, 2- floating drums, 21- kickboards, 22-
Cylinder, 23- columns, 3- displacement sensors, 31- sensor bodies, 32- telescopic rods, 4- displacement data acquisition systems, 5- fixed links,
6- cables, 7- fixed ropes, the 8- waters surface.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It should be noted that when component is referred to as " being fixed on " another component, it can be directly on another component
Or there may also be components placed in the middle.When a component is considered as " connection " another component, it can be directly connected to
To another component or it may be simultaneously present component placed in the middle.When a component is considered as " being set to " another component, it
Can be set up directly on another component or may be simultaneously present component placed in the middle.Term as used herein is " vertical
", " horizontal ", "left", "right" and similar statement for illustrative purposes only.
Unless otherwise defined, all of technologies and scientific terms used here by the article and belong to the technical field of the present invention
The normally understood meaning of technical staff is identical.Used term is intended merely to description tool in the description of the invention herein
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the Listed Items of pass.
Please referring also to Fig. 1 and Fig. 3, embodiment of the present invention provide SEA LEVEL VARIATION in a kind of quick tested for leaks water cofferdam
Rate devices, including fixed frame 1,2, three displacement sensors 3 of floating drum and displacement data acquisition system 4.Floating drum 2 includes kickboard
21, cylinder 22 and three columns 23, kickboard 21 are movably set in cylinder 22 and can be along cylinders 22 under the buoyancy of water
Inner wall sliding motion.Cylinder 22 is installed in the bottom of fixed frame 1.Three columns 23 are spaced the outer wall for being installed in cylinder 22, cylinder
22 are welded to connect the bottom of fixed frame 1 by three columns 23.Opposite end in cylinder 22 is equipped with limited block (not shown),
It skids off outside cylinder 22, and is convenient for carrying for limiting kickboard 21.The overall diameter of cylinder 22 is set as 20~30cm, highly it is set as 20~
30cm.The diameter of kickboard 21 is set as 18~28cm, is highly set as 2~4cm.In the present embodiment, the overall diameter of cylinder 22 is set
For 20cm, it is highly set as 20cm.The diameter of kickboard 21 is set as 18cm, is highly set as 3cm.Such size setting, is ensuring to survey
While examination needs, increase the contact area of kickboard 21 and the water surface 8, to increase the accuracy of test data.
Please referring also to Fig. 1 and Fig. 2, fixed frame 1 include hanging ring 11,12, two fixed rings 13 of brace and three montants 14.
Two fixed rings 13 are arranged in parallel and are connected by three montants 14, and the free terminal of two montants 14 is respectively fixedly connected with cylinder
22.In the present embodiment, cylinder 22 is by being welded to connect the free terminals of two montants 14.Hanging ring 11 is connected by brace 12
Fixed ring 13 far from 22 one end of cylinder.
Please referring also to Fig. 1 and Fig. 4, the kickboard 21 that displacement sensor 3 is used to acquire because of caused by SEA LEVEL VARIATION are floated
Change in displacement data.Each displacement sensor 3 respectively includes sensor body 31 and telescopic rod 32.Sensor body 31 is mounted on solid
Determine on the montant 14 of frame 1, there are one sensor bodies 31 for each installation of montant 14.32 activity of telescopic rod is fastened on sensor body 31
Inner wall sliding motion interior and along sensor body 31, the one end of telescopic rod 32 far from sensor body 31 abut kickboard 21.In this reality
It applies in mode, the lower end of sensor body 31 is installed with a card and sets part (not shown), and the upper end of telescopic rod 32 is installed with a locating part
(not shown), the upper end of telescopic rod 32 is arranged in the card by the locating part and designs, to prevent telescopic rod 32 from skidding off sensing
Outside body 31.31 inner hollow of sensor body, so that telescopic rod 32 can be along the inner wall sliding motion of sensor body 31.Displacement data
Acquisition system 4 is installed in outside fixed frame 1, and the one end of each sensor body 31 far from telescopic rod 32 is separately connected displacement data acquisition
System 4.
Referring again to Fig. 1, in the present embodiment, each sensor body 31 is installed in by a fixed link 5 solid respectively
Determine in the fixed ring 13 of the lower section of frame 1.Each sensor body 31 is fixed on by way of binding respectively in each fixed link 5.
A lock (not shown) is installed in each fixed link 5, each fixed link 5 is detachably connected solid by the lock respectively
Determine the fixed ring 13 of frame 1.Such setting so that fixed frame 1 can rapidly be dismantled or be rapidly assembled in displacement sensor 3
On, it is easy to carry.The one end of each sensor body 31 far from telescopic rod 32 connects displacement data collecting system by cable 6 respectively
4.The water level displacement data of 4 real-time collecting test project of displacement data acquisition system.
The test method of SEA LEVEL VARIATION rate devices, includes the following steps in a kind of quick tested for leaks water cofferdam：
(1) each sensor body 31 is bound respectively in each fixed link 5 first, then passes through each fixed link 5
The fixed ring 13 of the lock Connection Bracket 1, and the other end connection displacement number of the cable 6 of each sensor body 31 will be connected
According to acquisition system 4；
(2) before being tested, floating drum 2 is navigated to by initial testing water 8 by hanging ring 11 using fixed rope 7, when floating drum 2
It is fixed after reaching the test water surface 8；
(3) it checks all appts equipment according to the prior art, carries out testing preceding debugging, it is ensured that instrument and equipment can be transported normally
Row；
(4) it returns to zero to displacement sensor 3, sets frequency acquisition, start to acquire test period-curves of water level；
(5) terminate experiment, finishing analysis is carried out to data.
In quick tested for leaks water cofferdam provided by the invention SEA LEVEL VARIATION rate devices when in use, by entire floating drum 2
It is placed in the position of the test water surface 8, when rising using water level, the buoyancy of water pushes the kickboard 21 in floating drum 2 to rise and is transmitted to
The high accuracy displacement sensor 3 being fixed in the fixed ring 13 of fixed frame 1 makes telescopic rod 32 generate stroke variation, and position
It moves data collecting system 4 and obtained waterlevel data progress acquisition storage in real time is detected to sensor body 31.
Above description is the detailed description for the present invention preferably possible embodiments, but embodiment is not limited to this hair
Bright patent claim, it is all the present invention suggested by technical spirit under completed same changes or modifications change, should all belong to
In the covered the scope of the claims of the present invention.
Claims (10)
1. SEA LEVEL VARIATION rate devices in a kind of quick tested for leaks water cofferdam, it is characterised in that：If including fixed frame, floating drum,
Dry displacement sensor and displacement data acquisition system, the floating drum include kickboard and cylinder, and the kickboard is movably set in described
In cylinder and the bottom of the fixed frame can be installed in along the inner wall sliding motion of the cylinder, the cylinder；Each institute's rheme
Displacement sensor respectively includes sensor body and telescopic rod, and the sensor body is mounted on the fixed frame, and the telescopic rod is lived
Dynamic to be fastened in the sensor body and along the inner wall sliding motion of the sensor body, the telescopic rod is far from the sensor
One end of body abuts the kickboard, and the displacement data acquisition system is installed in outside the fixed frame, each sensor body
One end far from the telescopic rod is separately connected the displacement data acquisition system.
2. SEA LEVEL VARIATION rate devices in quickly tested for leaks water cofferdam as described in claim 1, it is characterised in that：Each institute
Sensor body is stated to be installed on the fixed frame by a fixed link respectively.
3. SEA LEVEL VARIATION rate devices in quickly tested for leaks water cofferdam as claimed in claim 2, it is characterised in that：Each institute
It states sensor body to be fixed on by way of binding respectively in each fixed link, one is installed in each fixed link
Lock, each fixed link pass through the detachably connected fixed frame of lock respectively.
4. SEA LEVEL VARIATION rate devices in quickly tested for leaks water cofferdam as described in claim 1, it is characterised in that：Each institute
The one end of sensor body far from the telescopic rod is stated respectively by displacement data acquisition system described in cable connection.
5. SEA LEVEL VARIATION rate devices in quickly tested for leaks water cofferdam as described in claim 1, it is characterised in that：It is described floating
Cylinder further includes several columns, and several column intervals are installed in the outer wall of the cylinder, and the cylinder passes through several described vertical
Column is fixedly connected with the bottom of the fixed frame.
6. SEA LEVEL VARIATION rate devices in quickly tested for leaks water cofferdam as described in claim 1, it is characterised in that：The circle
Opposite end in cylinder is equipped with limited block.
7. SEA LEVEL VARIATION rate devices in quickly tested for leaks water cofferdam as described in claim 1, it is characterised in that：The circle
The overall diameter of cylinder is set as 20~30cm, is highly set as 20~30cm.
8. SEA LEVEL VARIATION rate devices in quickly tested for leaks water cofferdam as described in claim 1, it is characterised in that：It is described floating
The diameter of plate is set as 18~28cm, is highly set as 2~4cm.
9. SEA LEVEL VARIATION rate devices in quickly tested for leaks water cofferdam as described in claim 1, it is characterised in that：It is described solid
It includes hanging ring, brace, two fixed rings and several montants to determine frame, and two fixed rings are arranged in parallel and by several described perpendicular
Bar connects, and the free terminal of several montants is respectively fixedly connected with the cylinder, and the hanging ring is connected remote by the brace
The fixed ring from described cylinder one end.
10. the test method of SEA LEVEL VARIATION rate devices in a kind of quick tested for leaks water cofferdam, which is characterized in that including following
Step：
(1) each sensor body is bound respectively in each fixed link first, then by each fixed link
Described in the other end for connecting the fixed frame by the lock, and connecting the cable of each sensor body connects
Displacement data acquisition system；
(2) before being tested, the floating drum is navigated to by the initial testing water surface by the hanging ring using fixed rope, when described
Floating drum is fixed after reaching the test water surface；
(3) it checks all appts equipment, carries out testing preceding debugging, it is ensured that instrument and equipment energy normal operation；
(4) it returns to zero to institute's displacement sensors, sets frequency acquisition, start to acquire test period-curves of water level；
(5) terminate experiment, finishing analysis is carried out to data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811054133.1A CN108709606B (en) | 2018-09-11 | 2018-09-11 | Device and method for rapidly testing water level change rate in water leakage cofferdam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811054133.1A CN108709606B (en) | 2018-09-11 | 2018-09-11 | Device and method for rapidly testing water level change rate in water leakage cofferdam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108709606A true CN108709606A (en) | 2018-10-26 |
| CN108709606B CN108709606B (en) | 2024-01-16 |
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ID=63873560
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811054133.1A Active CN108709606B (en) | 2018-09-11 | 2018-09-11 | Device and method for rapidly testing water level change rate in water leakage cofferdam |
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| CN106441494A (en) * | 2016-09-30 | 2017-02-22 | 防城港市海河堤管理站 | Dike water level detecting and alarming device |
| CN106443836A (en) * | 2016-10-14 | 2017-02-22 | 北京美科华仪科技有限公司 | Liquid level meter type rain gauge |
| CN107063396A (en) * | 2017-06-08 | 2017-08-18 | 苏州盖恩茨电子科技有限公司 | A kind of waterlevel data detection means based on water logging sensing detection |
| CN207335824U (en) * | 2017-08-27 | 2018-05-08 | 陈勇 | A kind of reservoir level detects warning device |
| CN207423318U (en) * | 2017-11-03 | 2018-05-29 | 鞍钢股份有限公司 | Liquid level detection device |
| CN208847293U (en) * | 2018-09-11 | 2019-05-10 | 广西路桥工程集团有限公司 | SEA LEVEL VARIATION rate devices in a kind of quick tested for leaks water cofferdam |
-
2018
- 2018-09-11 CN CN201811054133.1A patent/CN108709606B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006023274A (en) * | 2004-06-10 | 2006-01-26 | Showa Kiki Kogyo Co Ltd | Leakage inspection device for liquid storage tank |
| CN102706410A (en) * | 2012-06-06 | 2012-10-03 | 合肥工业大学 | Pontoon-type groundwater burial depth rate instrument and testing method thereof |
| CN205333154U (en) * | 2016-01-21 | 2016-06-22 | 成都边界元科技有限公司 | Water level early warning system monitoring station supporting device based on big dipper satellite |
| CN106441494A (en) * | 2016-09-30 | 2017-02-22 | 防城港市海河堤管理站 | Dike water level detecting and alarming device |
| CN106443836A (en) * | 2016-10-14 | 2017-02-22 | 北京美科华仪科技有限公司 | Liquid level meter type rain gauge |
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| CN207335824U (en) * | 2017-08-27 | 2018-05-08 | 陈勇 | A kind of reservoir level detects warning device |
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| CN208847293U (en) * | 2018-09-11 | 2019-05-10 | 广西路桥工程集团有限公司 | SEA LEVEL VARIATION rate devices in a kind of quick tested for leaks water cofferdam |
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| Publication number | Publication date |
|---|---|
| CN108709606B (en) | 2024-01-16 |
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