Automatic liquid level control device for measuring extinction coefficient of liquid
By using an automatic liquid level control device, which controls the liquid level through a drain hole and a solenoid valve, and combining it with optical fiber and a spectrometer, the problem of low liquid level control accuracy in liquid extinction coefficient measurement is solved, and high accuracy and stability of liquid extinction coefficient measurement are achieved.
Patent Information
- Application Number
- CN202520367163.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-03-04
AI Technical Summary
In the measurement of liquid extinction coefficient, the low precision of liquid level control leads to a difference between the calculated optical path value and the actual optical path value, affecting the accuracy and stability of the measurement results.
An automatic liquid level control device is adopted, including a measuring tube, an upper connecting box and a lower connecting box. The liquid level is controlled through a drain hole and a solenoid valve. Combined with optical fiber and a spectrometer, high-precision liquid level control is achieved, avoiding spectral signal fluctuations caused by liquid flowing in different pipes.
It achieves high accuracy and stability in liquid extinction coefficient measurement. Through solidification mechanical structure design, it ensures that the liquid level is at the measurement level, thereby improving the accuracy of liquid level control.
Smart Images
Figure CN223692676U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to water body extinction coefficient measurement technical field especially is related to a liquid level automatic control device for liquid extinction coefficient measurement. BACKGROUND
[0002] Since the accurate measurement of liquid extinction coefficient and its change depends on the accurate measurement of actual liquid level (optical path) and corresponding spectrum signal, lower liquid level control precision will result in the difference between the optical path value used in extinction coefficient calculation and actual optical path, and further result in the decline of accuracy and stability of liquid extinction coefficient measurement result. SUMMARY
[0003] In order to improve the control precision of liquid level during liquid extinction coefficient measurement and ensure the accuracy and stability of liquid extinction coefficient measurement result, the application provides a liquid level automatic control device for liquid extinction coefficient measurement.
[0004] The liquid level automatic control device for liquid extinction coefficient measurement provided by the application adopts the following technical scheme:
[0005] A liquid level automatic control device for liquid extinction coefficient measurement, comprising a measuring tube, an upper communication box and a lower communication box, the measuring tube is a light shielding tube, the upper communication box and the lower communication box are connected to the top and bottom of the measuring tube respectively, a light passing hole, a water inlet hole and a first drainage hole are formed on the lower communication box, the light passing hole is arranged opposite to the measuring tube, a lower window sheet is connected to the inner side of the light passing hole, and a light source is arranged on the outer side of the light passing hole, a water inlet assembly is arranged at the water inlet hole, second, third and fourth drainage holes are formed on the measuring tube, the second, third and fourth drainage holes are arranged in sequence from bottom to top along the height direction of the measuring tube, the second drainage hole corresponds to the lowest measuring liquid level line, the third drainage hole corresponds to the middle measuring liquid level line, and the fourth drainage hole corresponds to the highest measuring liquid level line, a drainage assembly is arranged outside the first, second, third and fourth drainage holes, a measuring hole is formed on the upper communication box, the measuring hole is opposite to the measuring tube, an upper window sheet is connected to the inner side of the measuring hole, a shutter and an optical fiber are installed on the outer side of the measuring hole, and a spectrometer is connected to the optical fiber.
[0006] Preferably, the water inlet assembly comprises a water inlet pipe, a check valve and a water inlet pump, the water inlet pipe is connected to the water inlet hole, the check valve is connected to the water inlet pipe, one end of the water inlet pump is connected to the water inlet pipe, and the other end of the water inlet pump is connected to a water tank.
[0007] Preferably, a filter is connected to the water inlet pipe, and the filter is located between the check valve and the water inlet pump.
[0008] Preferably, the drainage assembly comprises a first drainage pipe, a second drainage pipe, a third drainage pipe, a fourth drainage pipe, a main drainage pipe, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a liquid sensor, the first drainage pipe is connected with the first drainage hole, the second drainage pipe is connected with the second drainage hole, the third drainage pipe is connected with the third drainage hole, the fourth drainage pipe is connected with the fourth drainage hole, the other ends of the first drainage pipe, the second drainage pipe, the third drainage pipe and the fourth drainage pipe are connected with the main drainage pipe, the first electromagnetic valve is connected with the first drainage pipe, the second electromagnetic valve is connected with the second drainage pipe, the third electromagnetic valve is connected with the third drainage pipe, and the liquid sensor is connected with the main drainage pipe, and the liquid sensor is located at the drainage end of the main drainage pipe.
[0009] Preferably, a plurality of air permeable holes are formed in the side wall of the upper communication box, and a waterproof air permeable valve is connected to each air permeable hole.
[0010] In summary, the present application has the following beneficial technical effects:
[0011] The liquid level automatic control device for liquid extinction coefficient measurement provided by the utility model adopts a single vertically placed measuring tube as a liquid container, can avoid spectrum signal fluctuation and unstable liquid level caused by reciprocating flow of liquid in different pipelines, is provided with a drainage hole at the measuring liquid level, controls the water level line at the measuring liquid level by a drainage pipe and an electromagnetic valve, ensures that the water level height can be at the measuring liquid level with high precision, controls the measuring liquid level through solidified mechanical structure design, realizes high accuracy and high repeatability of optical path control, and thus the control precision of liquid level during liquid extinction coefficient measurement is improved, and the accuracy and stability of liquid extinction coefficient measurement results are ensured. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 is a structural schematic diagram of the liquid level automatic control device for liquid extinction coefficient measurement in the embodiment of the present application.
[0013] Figure 2 is a flow schematic diagram of the liquid level automatic control device for liquid extinction coefficient measurement in the embodiment of the present application.
[0014] Mark 1, measuring tube; 2, upper communication box; 21, upper window piece; 22, shutter; 23, optical fiber; 24, waterproof air permeable valve; 3, lower communication box; 31, lower window piece; 32, light source; 4, water inlet assembly; 41, water inlet pipe; 411, filter; 42, check valve; 43, water inlet pump; 5, drainage assembly; 51, first drainage pipe; 52, second drainage pipe; 53, third drainage pipe; 54, fourth drainage pipe; 55, main drainage pipe; 56, first electromagnetic valve; 57, second electromagnetic valve; 58, third electromagnetic valve; 59, liquid sensor. DETAILED DESCRIPTION
[0015] In order to make the personnel in the art better understand the scheme of the utility model, the scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the utility model.
[0016] In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation and a particular orientation configuration and operation, therefore, it cannot be understood as a limitation on the utility model; the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance, in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0017] The embodiment of the application discloses a liquid level automatic control device for liquid extinction coefficient measurement. Figure 1The application discloses an automatic liquid level control device for liquid extinction coefficient measurement.
[0018] The shutter 22 can be directly connected with other spectrum measuring instruments, and is not limited to the combination of the optical fiber 23 and the spectrometer.
[0019] The water inlet assembly 4 comprises a water inlet pipe 41, a check valve 42 and a water inlet pump 43, the water inlet pipe 41 is connected with the water inlet hole, the check valve 42 is connected with the water inlet pipe 41, one end of the water inlet pump 43 is connected with the water inlet pipe 41, and the other end of the water inlet pump 43 is connected with a water tank.
[0020] The water inlet pipe 41 is connected with a filter 411, the filter 411 is located between the check valve 42 and the water inlet pump 43, and the filter 411 filters out larger impurities, so that the water inlet pipe 41 is prevented from being blocked.
[0021] The water drainage assembly 5 comprises a first water drainage pipe 51, a second water drainage pipe 52, a third water drainage pipe 53, a fourth water drainage pipe 54, a main water drainage pipe 55, a first electromagnetic valve 56, a second electromagnetic valve 57, a third electromagnetic valve 58 and a liquid sensor 59, the first water drainage pipe 51 is connected with the first water drainage hole, the second water drainage pipe 52 is connected with the second water drainage hole, the third water drainage pipe 53 is connected with the third water drainage hole, the fourth water drainage pipe 54 is connected with the fourth water drainage hole, one end of the first water drainage pipe 51, the second water drainage pipe 52, the third water drainage pipe 53 and the fourth water drainage pipe 54 is connected with the main water drainage pipe 55, the first electromagnetic valve 56 is connected with the first water drainage pipe 51, the second electromagnetic valve 57 is connected with the second water drainage pipe 52, the third electromagnetic valve 58 is connected with the third water drainage pipe 53, and the liquid sensor 59 is connected with the main water drainage pipe 55.
[0022] The side wall of the upper communicating box 2 is provided with a gas permeable hole, and a waterproof gas permeable valve 24 is connected to the gas permeable hole. When the liquid enters the measuring tube 1, the air in the measuring tube 1 can be discharged from the waterproof gas permeable valve 24 and the fourth drain pipe 54 to balance the air pressure inside and outside the measuring tube 1 and reduce the resistance when pumping the liquid.
[0023] The single vertically placed measuring tube 1 is used as a liquid container, which can avoid the spectrum signal fluctuation and unstable liquid level caused by the reciprocating flow of liquid in different pipelines. The measuring tube 1 is provided with a drain hole at the measuring liquid level, and the water level at the measuring liquid level is controlled by a plurality of drain pipes and electromagnetic valves to ensure that the water level height can be accurately at the measuring liquid level. The measuring liquid level is controlled through the solidified mechanical structure design to realize the high accuracy and high repeatability of the optical path control, thereby improving the control accuracy of the liquid extinction coefficient measurement and ensuring the accuracy and stability of the liquid extinction coefficient measurement result.
[0024] Reference Figure 2 The implementation principle of the liquid level automatic control device for liquid extinction coefficient measurement according to the embodiment of the application is as follows:
[0025] S1, when no liquid is pumped into the measuring tube 1 (which can be considered as being at a reference liquid level H0), the light source 32 and the shutter 22 are opened, and the reference spectrum signal I0 is collected by the spectrometer. After the end, the next step is entered;
[0026] S2, according to the preset measuring liquid level Hm (middle measuring liquid level), the corresponding third electromagnetic valve 58 is opened (if the preset measuring liquid level is the highest measuring liquid level, i.e. Hm = Hmax, the electromagnetic valve does not need to be opened), and the rest of the electromagnetic valves are in the default closed state. The water inlet pump 43 is opened to make the liquid to be measured enter the lower communicating box 3 and the measuring tube 1 after passing through the filter 411 and the check valve 42. As the liquid level in the measuring tube 1 continues to rise, the air above the liquid level is discharged through the waterproof gas permeable valve 24 and the fourth drain pipe 54;
[0027] S3, when the liquid level reaches the preset measuring liquid level Hm, further pumping of the liquid by the water inlet pump 43 will cause excess liquid to overflow from the third drain hole, and then be discharged through the main drain pipe 55. At this time, the liquid sensor 59 senses the overflow of the liquid, triggers the water inlet pump 43 to stop working, and until the liquid sensor 59 detects that there is no liquid in the main drain pipe 55 (which indicates that the liquid level has stabilized at Hm), the transmission spectrum signal Im of the light after passing through the liquid to be measured with a height of Hm-H0 can be measured.
[0028] S4, judging whether Im is in the system optimal working interval [Imin, Imax], i.e. Imin≤Im≤Imax, if Im<Imin, it indicates that the liquid transparency is lower, the measuring liquid level Hm needs to be adjusted to a lower level Hm-1 and S2-S4 is re-executed, if Im>Imax, it indicates that the liquid transparency is too high or the light source 32 is too bright, the measuring liquid level Hm needs to be adjusted to a higher level Hm+1 and S2-S4 is re-executed, until Im is in the system optimal working interval [Imin, Imax];
[0029] S5, after the above measurement, the light source 32 is turned off, all electromagnetic valves are opened to discharge the liquid in the pipeline (at this time, external air enters the inside of the measuring pipe 1 from the waterproof air valve 24 to balance the air pressure inside and outside the pipeline), after the liquid sensor 59 cannot detect the liquid in the main drain pipe 55, all electromagnetic valves are closed, the measurement is completed, the collected I0, Im data and liquid level data H0, Hm can be used to calculate the extinction coefficient of the liquid to be measured with a thickness of Hm-H0: α=[-ln(Im / I0)] / (Hm-H0).
[0030] Finally, it should be noted that: the above is only the preferred embodiments of the present application, the protection scope of the present application is not limited to the above examples, any technical solutions under the idea of the present application belong to the protection scope of the present application. It should be pointed out that, for ordinary skilled in the art, without departing from the principles of the present application, some improvements and decorations, these improvements and decorations should also be considered as the protection scope of the present application.
Claims
1. A liquid level automatic control device for liquid extinction coefficient measurement, characterized in that: The utility model provides a kind of liquid level measuring device, including measuring tube (1), upper communicating box (2) and lower communicating box (3), the measuring tube (1) is light shielding tube, upper communicating box (2) and lower communicating box (3) are connected to the top and bottom of measuring tube (1) respectively, lower communicating box (3) is opened with light hole, water inlet hole and first drainage hole, the light hole is opposite measuring tube (1) and is provided, the inner side of light hole is connected with lower window piece (31), and the outer side is provided with light source (32), water inlet assembly (4) is arranged at water inlet hole, second drainage hole, third drainage hole and fourth drainage hole are opened in measuring tube (1), second drainage hole, third drainage hole and fourth drainage hole are sequentially arranged from bottom to top along the height direction of measuring tube (1), second drainage hole corresponds the lowest measuring liquid level line, third drainage hole corresponds intermediate measuring liquid level line, fourth drainage hole corresponds the highest measuring liquid level line, the outside of first drainage hole, second drainage hole, third drainage hole and fourth drainage hole is provided with drainage assembly (5), measuring hole is opened in upper communicating box (2), the measuring hole is opposite measuring tube (1), the inner side of measuring hole is connected with upper window piece (21), shutter (22) and optical fiber (23) are installed on the outer side of measuring hole, and optical fiber (23) is connected with spectrometer.
2. The automatic liquid level control device for measuring the extinction coefficient of liquid according to claim 1, characterized in that: The water inlet assembly (4) includes a water inlet pipe (41), a check valve (42) and a water inlet pump (43), the water inlet pipe (41) is connected with the water inlet hole, the check valve (42) is connected to the water inlet pipe (41), one end of the water inlet pump (43) is connected with the water inlet pipe (41), and the other end is connected with a water tank.
3. The automatic liquid level control device for liquid extinction coefficient measurement according to claim 2, characterized in that: The water inlet pipe (41) is connected with a filter (411), and the filter (411) is located between the check valve (42) and the water inlet pump (43).
4. The automatic liquid level control device for liquid extinction coefficient measurement according to claim 1, characterized in that: The drainage assembly (5) includes a first drainage pipe (51), a second drainage pipe (52), a third drainage pipe (53), a fourth drainage pipe (54), a main drainage pipe (55), a first electromagnetic valve (56), a second electromagnetic valve (57), a third electromagnetic valve (58) and a liquid sensor (59), the first drainage pipe (51) is connected with the first drainage hole, the second drainage pipe (52) is connected with the second drainage hole, the third drainage pipe (53) is connected with the third drainage hole, the fourth drainage pipe (54) is connected with the fourth drainage hole, the other end of the first drainage pipe (51), the second drainage pipe (52), the third drainage pipe (53) and the fourth drainage pipe (54) is connected with the main drainage pipe (55), the first electromagnetic valve (56) is connected with the first drainage pipe (51), the second electromagnetic valve (57) is connected with the second drainage pipe (52), the third electromagnetic valve (58) is connected with the third drainage pipe (53), the liquid sensor (59) is connected with the main drainage pipe (55), and the liquid sensor (59) is located at the drainage end of the main drainage pipe (55).
5. The automatic liquid level control device for liquid extinction coefficient measurement according to claim 1, characterized in that: The sidewall of the upper communicating box (2) is provided with a ventilation hole, and the ventilation hole is connected with a waterproof ventilation valve (24).