CN218297933U - Muddy water surface tension coefficient measuring device - Google Patents
Muddy water surface tension coefficient measuring device Download PDFInfo
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- CN218297933U CN218297933U CN202222482275.6U CN202222482275U CN218297933U CN 218297933 U CN218297933 U CN 218297933U CN 202222482275 U CN202222482275 U CN 202222482275U CN 218297933 U CN218297933 U CN 218297933U
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Abstract
The utility model discloses a muddy water surface tension coefficient measuring device, which comprises a testing barrel, wherein the testing barrel adopts a double-barrel structure and is provided with an inner barrel and an outer barrel, and the height of the inner barrel is lower than that of the outer barrel; a metal measuring ring is arranged right above the inner barrel and is adsorbed on the lower surface of a fixed disk by adopting a magnet, the upper surface of the fixed disk is provided with a transmitting end of a horizontally arranged measuring ring horizontal monitoring photoelectric sensor, and the corresponding receiving ends are respectively arranged on an upright post B of the portal frame; the outer barrel is characterized in that a transmitting end of a horizontally arranged liquid level monitoring photoelectric sensor is vertically arranged on the outer side surface of the outer barrel, 2 receiving ends corresponding to the transmitting end and the receiving ends are respectively arranged on a stand column B of the portal frame, one of the receiving ends corresponds to an initial position of the testing barrel, the other receiving end corresponds to an end position of the testing barrel, and the 2 receiving ends of the liquid level monitoring photoelectric sensor and the receiving end of the measuring ring level monitoring photoelectric sensor are respectively connected with a signal indicating lamp. The utility model discloses but accurate measurement muddy water surface tension coefficient.
Description
Technical Field
The utility model relates to a belong to dam engineering hydraulics test technical field, in particular to muddy water surface tension coefficient survey device.
Background
The leakage atomization is a very complex water-gas and gas-water two-phase flow, and a plurality of factors influence the rainfall intensity and the atomization range. Among them, the bleed condition is one of the main influencing factors. In the current research, a water head, a discharge amount, a flip bucket type and an energy dissipation mode are mainly used as clustering indexes, and the influence on water quality is less concerned. In practical engineering, when the discharged water flow has a large sand content (muddy water), muddy water mist can pollute the environment, for example, muddy mist is generated when a bronze gorge hydropower station on a yellow river discharges water, so that open-air equipment is covered with a layer of muddy dirt, and the normal performance of the equipment is influenced.
Surface tension is closely related to water current aeration, bubble migration, water mist diffusion and the like. At present, studies on the measurement of the surface tension coefficient mainly relate to the ambient air pressure, the ambient air temperature, the liquid temperature, and the like, and studies on muddy water are few. In order to explore the characteristics of the atomization field source of the muddy water, the surface tension coefficient of the atomized muddy water needs to be measured.
The pull-off method and the capillary tube lifting method are the main methods for measuring the surface tension coefficient. The method of pull-off is suitable for measuring the surface tension coefficient of muddy water, and the capillary lifting method is not suitable for measuring the surface tension coefficient of muddy water. Because the pull-off method can calculate the surface tension coefficient by measuring the transient tension change value before and after the metal lifting ring breaks the liquid film on the liquid surface, the influence of muddy water quality is avoided; while capillaries are prone to clogging.
The prior patent document CN 205958411U discloses a scheme for measuring the surface tension coefficient of a liquid by adopting a pull-off method, and the lifting stability of the liquid level of the liquid can be improved by using a motor design such as a stepping motor, but the level and the measuring position of a test liquid level and a measuring ring are not monitored; if the test liquid level and the test ring are not horizontal, the accuracy, reliability and consistency of the test result cannot be ensured; if the test liquid level and the test position of the test ring are unstable, a certain coarse error also exists when the measurement is repeated under the same working condition and compared with different working conditions. Therefore, it is urgently needed to design a device capable of accurately measuring the surface tension coefficient of muddy water.
SUMMERY OF THE UTILITY MODEL
The utility model provides a device capable of accurately measuring the surface tension coefficient of muddy water for solving the technical problems in the prior art.
The utility model discloses a technical scheme who takes for solving the technical problem that exists among the well-known technique is: a muddy water surface tension coefficient measuring device comprises a bottom plate, wherein a portal frame is arranged on the bottom plate, a liftable supporting platform is arranged below the portal frame, a testing barrel is arranged on the liftable supporting platform, the testing barrel adopts a double-barrel structure and is provided with an inner barrel and an outer barrel, the inner barrel is shorter than the outer barrel, and an annular space is arranged between the inner barrel and the outer barrel; the inner barrel is connected with a liquid supply barrel through a supply hose, the liquid supply barrel is positioned above the side of the testing barrel and is connected with an upright post A of the portal frame through a horizontal cantilever, a stirrer is arranged in the liquid supply barrel, and a flow regulating valve is arranged on the supply hose; a metal measuring ring is arranged right above the inner barrel, the outer diameter of the metal measuring ring is smaller than the inner diameter of the inner barrel, the metal measuring ring is adsorbed on the lower surface of a fixed disk by adopting a magnet, and a hollow leakage hole is formed between the fixed disk and the metal measuring ring; the fixed disc is horizontally placed and connected with a force-sensitive sensor through a suspension wire, the force-sensitive sensor is fixed on a cross beam of the portal frame, and the force-sensitive sensor is connected with an acquisition instrument; the upper surface of the fixed disc is provided with a transmitting end of a horizontally arranged measuring ring horizontal monitoring photoelectric sensor, and a receiving end of the measuring ring horizontal monitoring photoelectric sensor corresponding to the transmitting end is arranged on a stand column B of the portal frame; a transmitting end of a horizontally arranged liquid level monitoring photoelectric sensor is vertically arranged on the outer side surface of the outer barrel, 2 receiving ends of the liquid level monitoring photoelectric sensors corresponding to the transmitting end are respectively arranged on a stand column B of the portal frame, one of the receiving ends corresponds to the initial position of the testing barrel, and the other receiving end corresponds to the ending position of the testing barrel; 2 receiving ends of the liquid level monitoring photoelectric sensor and the receiving end of the measuring ring level monitoring photoelectric sensor are respectively connected with a signal indicator lamp; the bottom parts of the inner barrel and the outer barrel are connected with the collecting barrel through a drain pipe, and a stop valve is arranged on the drain pipe.
And a hook is arranged on the horizontal cantilever.
The transmitting end of the measuring ring horizontal monitoring photoelectric sensor is circumferentially and uniformly distributed in 3 numbers along the fixed disc.
The supply barrel is offset above the left side of the test barrel and the collection barrel is offset below the right side of the test barrel.
The utility model has the advantages and positive effects that: the liquid level measuring device is designed based on the principle of a pull-off method, the principle is clear, and the photoelectric sensor is used for visually monitoring the level of the liquid level to be measured and the level of the measuring ring and the measuring position, so that the level of the liquid level to be measured and the level of the measuring ring and the stability of the measuring position can be ensured, and the accuracy, the reliability and the consistency of a measuring result can be ensured. In addition, the interior bucket of test bucket is less than outer bucket, has played through the function of stabilizing the test liquid level from the overflow. And the utility model discloses simple structure, with low costs, stability is good, can provide basic data for exploring the atomizing field source characteristic that the earial drainage atomizing mud fog formed and spread.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a base plate; 2. a door frame; 2-1, a beam of the portal frame; 2-2, upright posts A of the portal frame; 2-3, a vertical column B of the door type frame; 3. a lifting support platform; 4. a testing barrel; 4-1, an inner barrel; 4-2, an outer barrel; 5. a supply hose; 6. a flow regulating valve; 7. a liquid supply barrel; 7-1, a stirrer; 8. a horizontal cantilever; 9. hooking; 10-metal measuring ring; 11-fixing the disc; 12. hanging wires; 13. a force sensitive sensor; 14. collecting an instrument; 15-1, horizontally monitoring the transmitting end of the photoelectric sensor by a measuring ring; 15-2, horizontally monitoring the receiving end of the photoelectric sensor by the measuring ring; 16-1, a transmitting end of a liquid level monitoring photoelectric sensor; 16-2, corresponding to the receiving end of the liquid level monitoring photoelectric sensor at the initial position of the test barrel; 16-3, a receiving end of the liquid level monitoring photoelectric sensor corresponding to the termination position of the test barrel; 17. a collection barrel; 18. a drain pipe; 19. and a stop valve.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments will be illustrated in detail with reference to the accompanying drawings:
referring to fig. 1, a muddy water surface tension coefficient measuring device comprises a bottom plate 1, a door type frame 2 is installed on the bottom plate 1, a liftable supporting platform 3 is arranged below the door type frame 2, a testing barrel 4 is arranged on the liftable supporting platform 3, the testing barrel 4 adopts a double-barrel structure and is provided with an inner barrel 4-1 and an outer barrel 4-2, the height of the inner barrel 4-1 is lower than that of the outer barrel 4-2, and an annular space is arranged between the inner barrel 4-1 and the outer barrel 4-2; the inner barrel 4-1 is connected with a liquid supply barrel 7 through a supply hose 5, the liquid supply barrel 7 is positioned above the side of the testing barrel 4 and is connected with an upright post A2-2 of the portal frame through a horizontal cantilever 8, a stirrer 7-1 is arranged in the liquid supply barrel 7, and a flow regulating valve 6 is arranged on the supply hose 5.
A metal measuring ring 10 is arranged right above the inner barrel 4-1, the outer diameter of the metal measuring ring 10 is smaller than the inner diameter of the inner barrel 4-1, the metal measuring ring 10 is adsorbed on the lower surface of a fixed disk 11 by adopting a magnet, and a leakage hole is formed between the fixed disk 11 and the metal measuring ring 10; the fixed disc 11 is horizontally arranged and is connected with the force-sensitive sensor 13 through the suspension wire 12, the force-sensitive sensor 13 is fixed on the cross beam 2-1 of the portal frame, and the force-sensitive sensor 13 is connected with the acquisition instrument 14.
A transmitting end 15-1 of a horizontally arranged measuring ring horizontal monitoring photoelectric sensor is arranged on the upper surface of the fixed disc 11, and a receiving end 15-2 of the measuring ring horizontal monitoring photoelectric sensor corresponding to the transmitting end is arranged on a stand column B2-3 of the portal frame; a transmitting end 16-1 of a horizontally arranged liquid level monitoring photoelectric sensor is vertically arranged on the outer side surface of the outer barrel 4-2, 2 receiving ends of the liquid level monitoring photoelectric sensors corresponding to the transmitting end are respectively arranged on a stand column B2-3 of the portal frame, one receiving end corresponds to the initial position of the testing barrel, and the other receiving end corresponds to the ending position of the testing barrel; and 2 receiving ends of the liquid level monitoring photoelectric sensor and the receiving end of the measuring ring level monitoring photoelectric sensor are respectively connected with a signal indicating lamp.
The bottoms of the inner barrel 4-1 and the outer barrel 4-2 are connected with a collecting barrel 17 through a drain pipe 18, and a stop valve 19 is arranged on the drain pipe 18.
In this embodiment, the horizontal cantilever 8 is provided with a hook 9 for hanging the supply hose 5 when the liftable supporting platform 3 is lifted, so that the liftable supporting platform 3 can be operated conveniently. The emitting ends 15-1 of the measuring ring horizontal monitoring photoelectric sensors are uniformly distributed in 3 along the circumferential direction of the fixed disc 11. The symmetrical arrangement facilitates leveling of the metal gauging ring 10. The liquid supply barrel 7 is offset above the left side of the test barrel 4, the collecting barrel 17 is offset below the right side of the test barrel 4, and the symmetrical arrangement facilitates circulation of muddy water and stability of the whole structure.
The utility model discloses an use and theory of operation:
1) Before the start of the test
Starting the acquisition instrument 14 and preheating; the sensitivity B of the force-sensitive sensor 13 is calibrated by loading weights; measuring the inner and outer diameters of the metal measuring ring 10 by a vernier caliper for multiple times, and taking the average outer diameter D 1 And an inner diameter D 2 。
2) At the beginning of the test
2.1 The suspension wire 12 is adjusted to center the transmitting end 15-1 of the measuring ring horizontal monitoring photoelectric sensor and the receiving end 15-2 of the measuring ring horizontal monitoring photoelectric sensor, and a signal indicator lamp on the receiving end 15-2 of the measuring ring horizontal monitoring photoelectric sensor is on to indicate that the metal measuring ring 10 is in a preset position and horizontal.
2.2 Starting the lifting supporting platform 3, when the transmitting end 16-1 of the liquid level monitoring photoelectric sensor is aligned with the receiving end 16-2 of the liquid level monitoring photoelectric sensor corresponding to the initial position of the testing barrel, closing the flow regulating valve 6 on the supply hose 5, closing the stop valve 19 on the drain pipe 18, injecting the test muddy water into the liquid supply barrel 7, and stirring by using the stirrer 7-1; after the mixture is uniformly stirred, the flow regulating valve 6 is opened, when the inner barrel 4-1 of the testing barrel 4 filled with the muddy water begins to overflow to the outer barrel 4-2, the flow regulating valve 6 is closed, the supply hose 5 is hung on the hook 9, and the signal indicator lamp on the receiving end 16-2 of the liquid level monitoring photoelectric sensor corresponding to the initial position of the testing barrel is on, so that the liquid level is at the preset initial position and is stable.
3) In the test process
The lifting support platform 3 slowly rises until the transmitting end 16-1 of the liquid level monitoring photoelectric sensor is aligned with the receiving end 16-3 of the liquid level monitoring photoelectric sensor corresponding to the termination position of the test barrel, the signal indicator lamp on the receiving end 16-3 of the liquid level monitoring photoelectric sensor corresponding to the termination position of the test barrel is on, the signal indicator lamp on the receiving end 15-2 of the measuring ring level monitoring photoelectric sensor is on, the liquid level reaches the preset termination position and is stable, and the acquisition instrument 14 starts to measure at the moment. Then the liftable supporting platform 3 slowly descends, when the metal measuring ring 10 is separated from the liquid level, the acquisition instrument 14 stops measuring, and the liftable supporting platform 3 continuously and slowly descends to a preset initial position.
Under the action of surface tension, the metal measuring ring 10 forms an annular liquid film when contacting the liquid surface, before the liquid film is broken, the voltage value of the acquisition instrument 14 is in the increasing process, and the instantaneous voltage before the liquid film is broken corresponds to the voltage peak value, which is marked as U 1 (ii) a The voltage of the acquisition instrument is rapidly reduced and becomes stable after the liquid film is broken, and the transient voltage corresponding to the stable voltage after the liquid film is broken is marked as U 2 And calculating the surface tension coefficient of muddy water under the corresponding working condition according to the following formula:
wherein alpha is the surface tension coefficient of muddy water, N/m;
U 1 instantaneous voltage before the liquid film is broken, mv;
U 2 the instantaneous voltage after the liquid film is broken, mv;
b is the sensitivity of the force sensor 13, mv/N;
D 1 is the outer diameter, m, of the metal gauging ring 10;
D 2 the inner diameter, m, of the metal measuring ring 10 is obtained;
4) Test condition replacement
4.1 When the working condition of muddy water with the same concentration is repeatedly measured, the metal measuring ring 10 is taken down and cleaned, and the metal measuring ring 10 is adjusted to be in the initial position and level according to the step 2.1); opening a stop valve 19 on the drain pipe 18, closing the stop valve 19 after the muddy water of the inner barrel 4-1 and the outer barrel 4-2 of the barrel 4 to be tested is discharged, and performing other testing steps like the steps 2.2) and 3);
4.2 When the working conditions of muddy water with different concentrations are repeatedly measured, the metal measuring ring 10 is taken down and cleaned, and the metal measuring ring 10 is adjusted to be in the initial position and level according to the step 2.1); opening the stop valve 19 on the drain pipe 18, washing the inner barrel 4-1 of the testing barrel 4 with clean water, closing the stop valve 19 after the inner barrel 4-1 of the testing barrel 4 is washed clean and water is drained, and performing other testing steps like the steps 2.2) and 3).
5) After the completion of the measurement
And (5) turning off the power supply of the instrument and the equipment, cleaning the test area and finishing the test.
Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, which is in the light of the following claims.
Claims (4)
1. A muddy water surface tension coefficient measuring device comprises a bottom plate and is characterized in that a portal frame is mounted on the bottom plate, a liftable supporting platform is arranged below the portal frame, a testing barrel is arranged on the liftable supporting platform and adopts a double-barrel structure and is provided with an inner barrel and an outer barrel, the inner barrel is shorter than the outer barrel, and an annular space is arranged between the inner barrel and the outer barrel; the inner barrel is connected with a liquid supply barrel through a supply hose, the liquid supply barrel is positioned above the side of the testing barrel and is connected with an upright post A of the portal frame through a horizontal cantilever, a stirrer is arranged in the liquid supply barrel, and a flow regulating valve is arranged on the supply hose;
a metal measuring ring is arranged right above the inner barrel, the outer diameter of the metal measuring ring is smaller than the inner diameter of the inner barrel, the metal measuring ring is adsorbed on the lower surface of a fixed disk by adopting a magnet, and a hollow leakage hole is formed between the fixed disk and the metal measuring ring; the fixed disc is horizontally placed and connected with a force-sensitive sensor through a suspension wire, the force-sensitive sensor is fixed on a cross beam of the portal frame, and the force-sensitive sensor is connected with an acquisition instrument;
the upper surface of the fixed disc is provided with a transmitting end of a horizontally arranged measuring ring horizontal monitoring photoelectric sensor, and a receiving end of the measuring ring horizontal monitoring photoelectric sensor corresponding to the transmitting end is arranged on a stand column B of the portal frame; a transmitting end of a horizontally arranged liquid level monitoring photoelectric sensor is vertically arranged on the outer side surface of the outer barrel, 2 receiving ends of the liquid level monitoring photoelectric sensors corresponding to the transmitting end are respectively arranged on a stand column B of the portal frame, one of the receiving ends corresponds to the initial position of the testing barrel, and the other receiving end corresponds to the ending position of the testing barrel; 2 receiving ends of the liquid level monitoring photoelectric sensor and the receiving end of the measuring ring level monitoring photoelectric sensor are respectively connected with a signal indicator lamp;
the bottom parts of the inner barrel and the outer barrel are connected with the collecting barrel through a drain pipe, and a stop valve is arranged on the drain pipe.
2. A muddy water surface tension coefficient measuring apparatus as set forth in claim 1, wherein a hook is provided on said horizontal arm.
3. The muddy water surface tension coefficient measuring device of claim 1, wherein 3 transmitting ends of the ring level monitoring photoelectric sensors are uniformly distributed along the circumferential direction of the fixed disk.
4. A muddy water surface tension coefficient measuring apparatus as defined in claim 1, wherein said supply tank is offset above a left side of said test tank, and said collection tank is offset below a right side of said test tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222482275.6U CN218297933U (en) | 2022-09-20 | 2022-09-20 | Muddy water surface tension coefficient measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222482275.6U CN218297933U (en) | 2022-09-20 | 2022-09-20 | Muddy water surface tension coefficient measuring device |
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| Publication Number | Publication Date |
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| CN218297933U true CN218297933U (en) | 2023-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222482275.6U Active CN218297933U (en) | 2022-09-20 | 2022-09-20 | Muddy water surface tension coefficient measuring device |
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- 2022-09-20 CN CN202222482275.6U patent/CN218297933U/en active Active
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