CN114674398B - Water level measuring device for water conservancy and hydropower - Google Patents
Water level measuring device for water conservancy and hydropower Download PDFInfo
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- CN114674398B CN114674398B CN202210461511.8A CN202210461511A CN114674398B CN 114674398 B CN114674398 B CN 114674398B CN 202210461511 A CN202210461511 A CN 202210461511A CN 114674398 B CN114674398 B CN 114674398B
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- measuring device
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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
- G01F23/40—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 using bands or wires as transmission elements
- G01F23/42—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 using bands or wires as transmission elements using mechanically actuated indicating means
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- General Physics & Mathematics (AREA)
- Level Indicators Using A Float (AREA)
Abstract
The invention provides a water level measuring device for water conservancy and hydropower, which comprises a measuring device body, wherein the measuring device body comprises a support and a floating mechanism, the top end of the support is provided with an upright post, the bottom end of the rear part of the support is provided with a returning mechanism, the top end of the returning mechanism is provided with a rotating belt, one side of the returning mechanism is provided with a returning spring, one side of a pull rod is fixedly connected with one end of the returning spring, two ends of the rotating belt are respectively provided with a rotating shaft, the water level height of the position of the floating mechanism can be displayed through a linkage assembly and the rotating belt, and measured data can be read through a scale mark corresponding to an indicating plate, so that the data reading is simpler and more convenient, and a buffer spring is arranged in a counterweight ball, so that when water waves fluctuate on the floating plate, the buffer spring is used for compensating, the top data reading can be kept stable, and cannot be influenced by instantaneous fluctuation.
Description
Technical Field
The invention relates to the field of water conservancy and hydropower, in particular to a water level measuring device for water conservancy and hydropower.
Background
In the in-process of carrying out the measurement to the water level, the professional water level measurement appearance will be used, float on the surface of water through the buoy, the metal member of recycling top instructs the water level, when observing, need carry out direct observation to the instruction scale mark that attaches the table top, therefore for the ease of observing, water level measurement device can install in the position that is close to the bank, and comparatively hard when observing, and during water level measurement, if the surface of water produces the stormy waves, just need only be consolidating the buoy, and the stormy waves can make the whole emergence of buoy stir, just increased the degree of difficulty of observation once more after the buoy produces stiring, and the easy error that produces, lead to the measuring precision not enough.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a water level measuring device for water conservancy and hydropower so as to solve the problems in the background technology.
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a water level measuring device for water conservancy water and electricity, includes the measuring device body, the measuring device body includes support and relocation mechanism, the stand is installed on the top of support, the bottom at the rear portion of support is provided with callback mechanism, the top of callback mechanism is provided with the rolling strip, the callback spring is installed to one side of callback mechanism, the pull rod is installed to the both sides of rolling strip, one side of pull rod and the one end fixed connection of callback spring, the pivot is all installed at the both ends of rolling strip, the surface of rolling strip is provided with the scale mark, the top of the rear end of support is provided with first bracing piece, the indicator plate is installed to the centre of first bracing piece, the surface cover of pivot is equipped with drive gear, the front end of support is provided with the linkage subassembly, the bottom of linkage subassembly is connected with first cable wire, the bottom of first cable wire is provided with relocation mechanism.
Further, the relocation mechanism includes counter weight ball and kickboard, the top of counter weight ball and the bottom fixed connection of first cable wire, the inside of counter weight ball is provided with the dashpot, the internally mounted of dashpot has buffer spring, buffer spring's bottom is connected with the limiting plate, the kickboard is installed under the limiting plate.
Further, the counterweight ball and the limiting plate are integrally made of alloy steel, the limiting plate is of a disc structure, the side edge of the limiting plate is attached to the inner wall of the buffer groove, and the connecting point of the first steel cable and the counterweight ball is located on the same straight line with the central axis of the buffer groove.
Furthermore, the weight of the counterweight ball is greater than that of the floating plate, and the elastic force of the back-adjusting spring in the limit stretching state is smaller than the sum of the weights of the counterweight ball and the floating plate.
Furthermore, the linkage assembly comprises a rotating shaft and a guide post, the first steel cable bypasses from the surface of the guide post, a sleeve ring is arranged at the front end of the support, the steel cable penetrates through the inner part of the sleeve ring, and two ends of the rotating shaft are embedded on the inner side of the stand column through bearings.
Furthermore, one end of the first steel cable is fixedly connected with the end of the rotating shaft, two transmission gears are mounted on the surface of each rotating shaft, and the rotating belt rotates by pulling the rotating shaft and the transmission gears through the first steel cable.
Furthermore, the middle of the floating plate is fixedly connected with the bottom end of the limiting plate through a second steel cable, and a plurality of auxiliary pull ropes are arranged on the side edge of the floating plate.
Furthermore, the floating plate and the counterweight balls are provided with two groups, and the floating plate floats on the water surface to be measured through the bottom surface.
Furthermore, the surface of the back-adjusting mechanism and the surface of the support are located on the same horizontal plane, the back-adjusting mechanism is connected with the back-adjusting spring through a second supporting rod, and a fixing block is installed at the rear end of the support.
Furthermore, the back-adjusting springs are arranged in two groups, the rear ends of the back-adjusting springs are symmetrically arranged on two sides of the second supporting rod, and the rotating belt is in a reverse rotating state when being pulled by the first steel cable through the pulling of the back-adjusting springs.
The invention has the beneficial effects that: the water level measuring device for water conservancy and hydropower comprises a measuring device body, wherein the measuring device body comprises a support, a floating mechanism, a counterweight ball, a linkage assembly, a back-adjusting mechanism, a rotating belt, a scale mark, a pull rod, a fixed block, an upright post, a rotating shaft, a first supporting rod, an indicating plate, a transmission gear, a bearing, a second supporting rod, a back-adjusting spring, a guide post, a lantern ring, a first steel cable, a floating plate, an auxiliary pull rope, a second steel cable, a limiting plate, a buffer groove and a buffer spring.
1. This water level measurement device for water conservancy water and electricity sets up the position of floating machanism keeping away from the bank, can demonstrate the position water level height at floating machanism place through linkage subassembly and rotation area to can read measured data through the position of the scale mark that reads the indicator panel and correspond, make data reading more simple and convenient.
2. This water level measuring device for water conservancy water and electricity is through the weight relation between the elastic coefficient of control callback spring and counterweight ball, the kickboard, can control the counterweight ball and suspend aloft all the time, and the kickboard floats on the surface of water, and then makes the relocation mechanism keep approximate vertically state, avoids taking place the removal on a large scale and leads to measuring error.
3. This water conservancy water and electricity water level measuring device has buffer spring at the internally mounted of counter weight ball to can wave about unrestrained the production of water to the kickboard and make, utilize buffer spring to compensate, can keep stable with guaranteeing that top data reads, can not produce the change immediately along with instantaneous fluctuation.
Drawings
FIG. 1 is a schematic structural view showing the external form of a water level measuring device for water conservancy and hydropower according to the present invention;
FIG. 2 is a schematic view showing the structure of a support part of a water level measuring device for water conservancy and hydropower according to the present invention;
FIG. 3 is a schematic view of a linkage assembly portion of a water level measuring device for water conservancy and hydropower according to the present invention;
FIG. 4 is a cross-sectional view of a floating mechanism portion of a water level measuring device for water conservancy and hydropower according to the present invention;
in the figure: 1. a support; 2. a floating mechanism; 3. a counterweight ball; 4. a linkage assembly; 5. a callback mechanism; 6. a rotating belt; 7. scale marks; 8. a pull rod; 9. a fixed block; 10. a column; 11. a rotating shaft; 12. a first support bar; 13. an indicator panel; 14. a transmission gear; 15. a bearing; 16. a second support bar; 17. the spring is adjusted back; 18. a guide post; 19. a collar; 20. a first wire rope; 21. a floating plate; 22. an auxiliary pull rope; 23. a second wire rope; 24. a limiting plate; 25. a buffer tank; 26. a buffer spring.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Referring to fig. 1 to 4, the present invention provides a technical solution: the utility model provides a water level measuring device for water conservancy and hydropower, includes the measuring device body, the measuring device body includes support 1 and relocation mechanism 2, stand 10 is installed on the top of support 1, the bottom at the rear portion of support 1 is provided with callback mechanism 5, the top of callback mechanism 5 is provided with rolling band 6, callback spring 17 is installed to one side of callback mechanism 5, pull rod 8 is installed to the both sides of rolling band 6, one side of pull rod 8 and callback spring 17's one end fixed connection, pivot 11 is all installed at the both ends of rolling band 6, the surface of rolling band 6 is provided with scale mark 7, the top of the rear end of support 1 is provided with first bracing piece 12, indicator plate 13 is installed to the centre of first bracing piece 12, the surface cover of pivot 11 is equipped with drive gear 14, the front end of support 1 is provided with linkage assembly 4, the bottom end of the linkage component 4 is connected with a first steel cable 20, the bottom end of the first steel cable 20 is provided with a floating mechanism 2, the water level measuring device is structurally installed at the position of the shore through a bracket 1, the floating mechanism 2 at the bottom end extends towards the front end through the length of the bracket 1, and the water level is measured on the water surface area at the front end of the bracket 1, so that the measuring range is the extending position of the bracket 1, the specific position of water level measurement and the measurable range of water level change can be controlled by controlling the length of the bracket 1, two groups of floating mechanisms 2 can be installed through two groups of bracket 1 structures and matched components, the measured data of the two groups of floating mechanisms 2 are averaged, and the effect of improving the measuring precision is achieved, when in installation, the bracket 1 is installed at the position of the shore with the water surface to be measured through a screw firstly passing through a fixed block 9 at the rear end of the bracket 1, the support 1 is parallel to the horizontal plane, and the rotating belt 6 at the top end and the corresponding measuring and reading mechanism are higher than the shore, so that the support can be effectively prevented from being soaked by water, and the support is ensured to have longer service life.
In this embodiment, the floating mechanism 2 includes a counterweight ball 3 and a floating plate 21, the top end of the counterweight ball 3 is fixedly connected with the bottom end of the first cable 20, a buffer groove 25 is arranged in the counterweight ball 3, a buffer spring 26 is arranged in the buffer groove 25, the bottom end of the buffer spring 26 is connected with a limit plate 24, the floating plate 21 is arranged right below the limit plate 24, the counterweight ball 3 and the limiting plate 24 are made of alloy steel integrally, the limiting plate 24 is of a disc structure, the side edge of the limit plate 24 is attached to the inner wall of the buffer groove 25, the connecting point of the first steel cable 20 and the counterweight ball 3 is in the same straight line with the central axis of the buffer groove 25, the floating mechanism 2 is composed of the counterweight ball 3 and a floating plate 21, the floating plate 21 is directly contacted with the water surface for floating, the floating plate 21 moves down after the water level is lowered during measurement due to the weight control suspended in the air, through the downward movement of the first and second cables 20 and 23, the downward movement range of the cables is finally converted into the rotation range of the rotating shaft 11 portion through the linkage assembly 4, thereby driving the rotating belt 6 at the top end to turn over, the surface of the rotating belt 6 is carved with scale marks 7, the scale marks 7 are aligned with the indicating plate 13 at the rear end of the bracket 1, when installing, it is necessary to measure the water level of the floating plate 21 in the initial state once, and use the measured data as the initial value in the state, that is, the value of the scale mark 7 marked on the indication plate 13 in this state is the current water level depth, so that after the subsequent water level is lowered, the change can be carried out on the basis of the initial value, when the water level is reduced, the rotating belt 6 is driven to rotate, the changed water level value can be read by changing the graduation lines 7 corresponding to the indicating plate 13.
In this embodiment, the weight of the counterweight ball 3 is greater than the weight of the floating plate 21, the elastic strength of the back-off spring 17 in the ultimate stretching state is less than the sum of the weights of the counterweight ball 3 and the floating plate 21, and by setting the weight, in the theoretical state, the back-off spring 17 is less than the sum of the weights of the counterweight ball 3 and the floating plate 21, so that the counterweight ball 3 and the floating plate 21 will naturally fall down until the bottom end of the floating plate 21 is supported by the buoyancy exerted by water, and at this time, the buoyancy of the water surface plays a role of supporting the floating plate 21, thereby causing the back-off spring 17 to pull the floated counterweight ball 3 and the floating plate 21, that is, the stable state can be reached, and since the pulling force of the back-off spring 17 is greater than the self weight of the counterweight ball 3, the counterweight ball 3 is always pulled upwards by the back-off spring 17 to keep floating, therefore, the counterweight ball 3 is not influenced by the fluctuation of the water surface, when the floating plate 21 deviates due to the fluctuation of the water surface, the counterweight ball 3 with the naturally drooped top end can be pulled, the phenomenon that the counterweight ball deviates greatly along with the waves is avoided, namely, the first steel cable 20 at the top end is close to the vertical state as much as possible, through the structure, the influence of the fluctuation of the water surface on the position of the floating mechanism 2 can be reduced, the floating mechanism 2 is positioned under the lantern ring 19 as much as possible, further, the subsequent measurement result is more accurate, the state can not change along with the change of the water level, through the structure, the lifting connecting piece which uses the steel cable to replace a rigid part can be eliminated, the cost is reduced, and the water-level-variable counterweight device can be applied to the water area with any depth.
In this embodiment, the linkage assembly 4 includes a rotating shaft 11 and a guide post 18, the first steel cable 20 passes through the surface of the guide post 18, a sleeve ring 19 is disposed at the front end of the bracket 1, the steel cable passes through the inside of the sleeve ring 19, two ends of the rotating shaft 11 are embedded inside the upright post 10 through bearings 15, one end of the first steel cable 20 is fixedly connected to the end of the rotating shaft 11, two transmission gears 14 are mounted on the surface of each rotating shaft 11, the rotating belt 6 pulls the rotating shaft 11 and the transmission gears 14 to rotate through the first steel cable 20, when the floating mechanism 2 changes with the water level, the floating plate 21 is pulled down to drive the first steel cable 20 at the top end to move down, after the floating plate 21 moves up, the linkage assembly 4 is driven to move in the opposite direction by the mechanism 5 at the top end, at this time, the steel cable vertically moves up and down from the inside of the sleeve ring 19 too small vertically, after passing through the top end of the sleeve ring 19, the guide pipe guides the steel cable to prevent the angle between the steel cable and the sleeve ring 19 from increasing wear, thereby prolonging the service life of the first steel cable 20, and adjusting the rotating shaft 11, when the rotating shaft 11 is pulled up, the rotating shaft 11, the rotating belt is pulled back, and the rotating shaft 11, so that the rotating shaft 11 can be pulled back again, and the rotating shaft 11, and the rotating belt can be adjusted and the rotating shaft 11.
This embodiment, the centre of kickboard 21 is through the bottom fixed connection of second cable 23 and limiting plate 24, the side of kickboard 21 is provided with a plurality of supplementary stay cords 22, kickboard 21 and counterweight ball 3 all are provided with two sets ofly, the density that kickboard 21 floated on the surface of water that awaits measuring through the bottom surface is less than the density of water, nevertheless can make its dead weight be greater than the dead weight of counterweight ball 3 through the volume that increases kickboard 21, can improve the stability between kickboard 21 and the counterweight ball 3 through the supplementary stay cord 22 of multiunit at the side of kickboard 21 to make counterweight ball 3 be in directly over the kickboard 21 focus all the time, consequently cooperate foretell weight relation control, but furthest's control kickboard 21 receives the skew influence that the fluctuation of water wave produced.
In this embodiment, the adjusting back mechanism 5 is located on the same horizontal plane as the surface of the bracket 1, the adjusting back mechanism 5 is connected to the adjusting back spring 17 through the second support rod 16, the fixing block 9 is installed at the rear end of the bracket 1, two sets of the adjusting back springs 17 are provided, and the rear ends of the adjusting back springs 17 are installed at both sides of the second support rod 16 in a symmetrical manner, the rotating belt 6 is rotated in a reverse direction when being pulled by the first steel cable 20 through the pulling of the adjusting back springs 17, the inside of the counterweight ball 3 is contacted with the floating plate 21 at the bottom end through the buffer springs 26, and therefore, when the floating plate 21 is affected by water waves, such as up and down vibration, the buffer springs 26 are used for preliminary compensation, if water waves move up the floating plate 21 instantaneously, at this time, the second steel cable 23 is loosened, the buffer springs 26 shrink the second steel cable 23, only compensate the length of the second steel cable 23, so that the second steel cable 23 can be instantaneously restored to a tensioned state, thereby preventing the floating plate 21 from moving up to equivalently transfer the looseness of the first steel cable 23 to the first steel cable 20, further eliminating the instantaneous height change of the rotating belt, and reading of the data, thereby simplifying the data reading period.
While there have been shown and described what are at present considered to be the basic principles and essential features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. The utility model provides a water level measuring device for water conservancy and hydropower, includes the measuring device body, its characterized in that: the measuring device body comprises a support (1) and a floating mechanism (2), wherein an upright post (10) is installed at the top end of the support (1), a back-adjusting mechanism (5) is arranged at the bottom of the rear end of the support (1), a rotating belt (6) is arranged above the back-adjusting mechanism (5), a back-adjusting spring (17) is installed at one side of the back-adjusting mechanism (5), pull rods (8) are installed at two sides of the rotating belt (6), one side of each pull rod (8) is fixedly connected with one end of the back-adjusting spring (17), rotating shafts (11) are installed at two ends of the rotating belt (6), scale marks (7) are arranged on the surface of the rotating belt (6), a first supporting rod (12) is arranged at the top of the rear end of the support (1), an indicating plate (13) is installed in the middle of the first supporting rod (12), a surface transmission gear (14) of each rotating shaft (11), a linkage assembly (4) is arranged at the front end of the support (1), the bottom end of the linkage assembly (4) is connected with the first supporting rod (20), a floating mechanism (2) is arranged at the bottom end of the first steel cable (3), and a floating ball (3) is connected with the floating ball (21) and a heavy ball matching mechanism, the inside of counter weight ball (3) is provided with dashpot (25), the internally mounted of dashpot (25) has buffer spring (26), the bottom of buffer spring (26) is connected with limiting plate (24), kickboard (21) are installed under limiting plate (24), counter weight ball (3) and limiting plate (24) whole all adopt alloy steel material, limiting plate (24) are the disc structure, and the side of limiting plate (24) and the inner wall of dashpot (25) laminate mutually, the junction of first cable wire (20) and counter weight ball (3) is in on the same straight line with the axis of dashpot (25), the weight of counter weight ball (3) is greater than kickboard (21) weight, the elasticity dynamics under the limit tensile state of back adjustment spring (17) is less than the weight sum of counter weight ball (3) and kickboard (21).
2. The water level measuring device for water conservancy and hydropower according to claim 1, which is characterized in that: the linkage assembly (4) comprises a rotating shaft (11) and a guide post (18), a first steel cable (20) bypasses the surface of the guide post (18), a sleeve ring (19) is arranged at the front end of the support (1), the steel cable penetrates through the inner part of the sleeve ring (19), and two ends of the rotating shaft (11) are embedded in the inner side of the upright post (10) through bearings (15).
3. The water level measuring device for water conservancy and hydropower according to claim 2, characterized in that: one end of the first steel cable (20) is fixedly connected with the end of the rotating shaft (11), two transmission gears (14) are mounted on the surface of each rotating shaft (11), and the rotating belt (6) pulls the rotating shaft (11) and the transmission gears (14) to rotate through the first steel cable (20).
4. The water level measuring device for water conservancy and hydropower according to claim 1, which is characterized in that: the middle of the floating plate (21) is fixedly connected with the bottom end of the limiting plate (24) through a second steel cable (23), and a plurality of auxiliary pull ropes (22) are arranged on the side edge of the floating plate (21).
5. A water level measuring device for water conservancy and hydropower according to claim 4, which is characterized in that: the floating plate (21) and the counterweight balls (3) are both provided with two groups, and the floating plate (21) floats on the water surface to be measured through the bottom surface.
6. A water level measuring device for water conservancy and hydropower according to claim 1, characterized in that: the surface of the back-adjusting mechanism (5) and the surface of the support (1) are located on the same plane, the back-adjusting mechanism (5) is connected with a back-adjusting spring (17) through a second supporting rod (16), and a fixing block (9) is installed at the rear end of the support (1).
7. A water level measuring device for water conservancy and hydropower according to claim 6, which is characterized in that: the two groups of the back-adjusting springs (17) are arranged, the rear ends of the back-adjusting springs (17) are symmetrically arranged on two sides of the second supporting rod (16), and the rotating belt (6) is in a rotating state opposite to that of the first steel cable (20) when being pulled through the back-adjusting springs (17).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210461511.8A CN114674398B (en) | 2022-04-28 | 2022-04-28 | Water level measuring device for water conservancy and hydropower |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210461511.8A CN114674398B (en) | 2022-04-28 | 2022-04-28 | Water level measuring device for water conservancy and hydropower |
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| CN114674398A CN114674398A (en) | 2022-06-28 |
| CN114674398B true CN114674398B (en) | 2022-11-29 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117249883B (en) * | 2023-10-27 | 2024-04-02 | 三峡金沙江云川水电开发有限公司 | Water level measuring device for hydropower plant |
| CN117433609B (en) * | 2023-12-20 | 2024-04-02 | 三峡金沙江云川水电开发有限公司 | Water level measuring device |
| CN117705219B (en) * | 2024-02-05 | 2024-05-28 | 青岛地质工程勘察院(青岛地质勘查开发局) | Drilling water level measuring device for hydrogeology investigation |
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| EP0138256A2 (en) * | 1983-09-29 | 1985-04-24 | N.V. Verenigde Instrumentenfabrieken ENRAF-NONIUS | Liquid level gauge |
| JPH0424517A (en) * | 1990-05-18 | 1992-01-28 | Tokyo Keiso Co Ltd | Take-up-type level gage |
| JP2002039842A (en) * | 2000-07-18 | 2002-02-06 | Semuko Kk | Float type level gage |
| CN210922773U (en) * | 2019-11-13 | 2020-07-03 | 李娜 | Water level detection device for hydraulic engineering |
| CN211877190U (en) * | 2020-05-22 | 2020-11-06 | 河南浩多顺节能环保科技有限公司 | Water level testing device |
| CN215984755U (en) * | 2021-08-27 | 2022-03-08 | 山东省调水工程运行维护中心 | Hydraulic engineering water level measuring device |
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2022
- 2022-04-28 CN CN202210461511.8A patent/CN114674398B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0138256A2 (en) * | 1983-09-29 | 1985-04-24 | N.V. Verenigde Instrumentenfabrieken ENRAF-NONIUS | Liquid level gauge |
| JPH0424517A (en) * | 1990-05-18 | 1992-01-28 | Tokyo Keiso Co Ltd | Take-up-type level gage |
| JP2002039842A (en) * | 2000-07-18 | 2002-02-06 | Semuko Kk | Float type level gage |
| CN210922773U (en) * | 2019-11-13 | 2020-07-03 | 李娜 | Water level detection device for hydraulic engineering |
| CN211877190U (en) * | 2020-05-22 | 2020-11-06 | 河南浩多顺节能环保科技有限公司 | Water level testing device |
| CN215984755U (en) * | 2021-08-27 | 2022-03-08 | 山东省调水工程运行维护中心 | Hydraulic engineering water level measuring device |
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| CN114674398A (en) | 2022-06-28 |
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