CN112014322B - Bubble eliminating device for water sample optical measurement method - Google Patents

Abstract

The invention discloses a bubble eliminating device for a water sample optical measurement method, which comprises a water tank, a gas collecting hood, a siphon pipeline and a micro-bubble adsorption pipeline, wherein the gas collecting hood is arranged on the water tank; the water tank is provided with a water inlet and a water outlet, a water injection pipe is arranged in the water inlet, a water sample pumped into the water tank through the water injection pipe forms vortex-shaped water flow, and the water outlet is externally connected with a water outlet pipeline; the gas collecting hood is arranged in the water tank and is used for collecting a water sample in the central area of the vortex-shaped water flow in the water tank; the gas collecting hood is connected with a gas collecting pipe, and the gas collecting pipe extends to the outside of the water tank and is connected with a siphon pipeline; the siphon pipeline is used for discharging the water sample collected by the gas collecting hood out of the water tank under the action of siphon force; the micro-bubble adsorption pipeline is used for sucking a water sample containing bubbles in the water outlet pipeline into the siphon pipeline under the action of siphon force. The bubble eliminating device provided by the invention is used for eliminating bubbles in a water sample to be measured based on a centrifugal force principle and a siphon effect, and solves the problem that the measurement accuracy of the water sample to be measured is influenced by bubble interference.

Description

A kind of bubble elimination device for water sample optical measurement method

technical field

The invention belongs to the technical field of water body measuring instruments, and in particular relates to an experimental device for eliminating air bubbles in a water sample to be measured.

Background technique

The hyperspectral water absorption and attenuation measuring instrument AC-S developed by the American Laurel Company is a recognized and recommended field measurement instrument in the field of ocean optics and ocean remote sensing. The traditional measurement method is to use the mooring method, that is, the instrument is placed in the seawater as a whole, and the in-situ measurement of the seawater to be measured is carried out. However, this measurement method will cause a large number of microorganisms to adhere to the measuring instrument, which will affect the service life of the instrument. Therefore, in recent years, in order to prevent biological adhesion and improve the service life of the instrument, the application of water supply sample method for measurement has begun to appear in buoys, shore stations, and scientific research ships. That is, the AC-S measuring instrument is mounted on an offshore platform or ship, and a water sample is drawn and sent to the instrument through the water supply and drainage system, and the water sample is discharged after the measurement is completed.

The working principle of the hyperspectral water absorption attenuation measuring instrument is to emit light of a certain wavelength to the water sample to be measured, and after the light passes through the water sample to be measured, the receiving end receives the optical signal and inverts various water quality indicators. In the water supply sample measurement method, affected by factors such as the water supply pressure of the pump and the flow of seawater in the pipeline, there will be a large number of disordered bubbles in the water sample, which will lead to a large number of noise signals in the measurement data, which directly affects the accuracy of the measurement results. Therefore, it is necessary to perform bubble elimination treatment in advance before the water sample to be measured enters the hyperspectral water absorption attenuation measuring instrument.

At present, the treatment methods for bubbles in liquids are mainly divided into the following types according to the characteristics of the liquid and the application fields:

(1) Simply relying on the buoyancy of the bubbles to rise and then discharge from the liquid surface, this method is inefficient and the effect is unstable;

(2) The vacuum pump generates negative pressure for adsorption. This method has extremely high requirements on the overall airtightness of the instrument, and requires additional auxiliary equipment, resulting in additional energy consumption;

(3) Through the mechanical device with acupuncture, the bubbles are pierced when the fluid passes through. This method is only suitable for viscous liquids with high viscosity and large bubbles;

(4) Air bubbles are eliminated by membrane filtration, but some substances in the water sample will be filtered out, thereby changing the physical properties of the water sample.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a bubble elimination device for an optical measurement method of water samples. By combining the centrifugal force principle with the siphon effect, the bubbles in the water sample to be measured can be effectively removed, and the problem of the water sample to be measured due to the The problem of air bubble interference affecting the measurement accuracy.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions to be realized:

A bubble elimination device for an optical measurement method of water samples, comprising a water tank, a water pump, a gas collecting hood, a siphon pipeline and a micro-bubble adsorption pipeline; wherein, the water tank is cylindrical, and a water inlet is provided on the tank wall, A water injection pipe is installed in the water inlet, and the water injection pipe is inclined relative to the tangent of the tank wall at the position of the water inlet, so that the water sample pumped into the water tank through the water injection pipe forms a swirling water flow; on the water tank A water outlet is provided, and the water outlet is connected to a water outlet pipe; the water pump is connected to the water injection pipe through a water inlet pipe, and is used to pump the water sample into the water tank; the gas collecting cover is built in the water tank , used to collect the water samples in the central area of the water tank with the swirling water flow; the gas collecting hood is connected to the gas collecting pipe, the gas collecting pipe extends to the outside of the water tank, and is connected to the siphon pipeline; the siphon pipeline is used to connect the The water sample collected by the gas collecting hood is discharged from the water tank under the action of siphon force; the micro-bubble adsorption pipeline is connected between the water outlet pipeline and the siphon pipeline, and is used for siphoning the water sample containing bubbles in the water outlet pipeline. Under the action of force, it is sucked into the siphon pipeline; the microbubble adsorption pipeline includes a first Y-shaped inclined tee, a second Y-shaped inclined tee and a Y-shaped tee; wherein, the first The Y-shaped inclined three-way pipe includes a first straight port, a second straight port and an inclined port, the first straight port is connected to the water outlet pipeline, and the inclined port is connected to the inlet of the first one-way valve; The second Y-shaped inclined tee includes a first straight port, a second straight port and an inclined port, and the first straight port of the second Y-shaped inclined tee is used to discharge the air after removing the bubbles. Water sample, the second straight port of the second Y-shaped inclined tee is connected to the second straight port of the first Y-shaped inclined three-way pipe, and the inclined port of the second Y-shaped inclined three-way pipe is connected to The inlet of the second one-way valve; the Y-shaped three-way pipe includes three nozzles, one of which is connected to the siphon pipeline, and the other two nozzles are respectively connected with the outlet of the first one-way valve and the second one-way valve. The outlets of the valves are connected in a one-to-one correspondence.

In some embodiments of the present application, it is preferable to set a bypass port on the water tank, and connect the siphon line to the bypass port, so that the water sample in the water tank flows through the siphon line through the bypass port Therefore, the water sample in the water tank can be used to generate a siphon effect, so as to generate a negative pressure in the air collecting pipe, and absorb the water sample collected by the air collecting hood.

In some embodiments of the present application, the siphon pipe includes a first siphon pipe, a second siphon pipe, a third siphon pipe and a bypass pipe; one end of the first siphon pipe is connected to the gas collecting pipe, and the other end passes through the first T-shaped pipe. The straight pipe of the three-way pipe is connected to the second siphon pipe, and the second siphon pipe is connected to the third siphon pipe through the straight pipe of the second T-shaped three-way pipe; the bypass pipe is connected to the bypass port on the water tank and the bypass port of the first T-shaped three-way pipe, and a bypass solenoid valve is installed on the bypass pipe; a siphon solenoid valve is installed on the second siphon pipe; the second T The bypass port of the three-way pipe is connected to the Y-type three-way pipe in the microbubble adsorption pipeline through the adsorption pipe.

In some embodiments of the present application, in order to increase the siphon force, in the siphon pipe, the diameters of the first siphon pipe, the second siphon pipe, the third siphon pipe and the bypass pipe are set to be equal and larger than those of the gas collecting pipe and the bypass pipe. The diameter of the adsorption pipe; the first siphon pipe is connected to the gas collecting pipe through a first reducing pipe, and the height of the first reducing pipe is lower than the height of the gas collecting hood; the second T-shaped three-way pipe The bypass port is connected to the adsorption pipe through a second reducing pipe. The suction force generated by the siphon effect can be amplified by setting the reducer.

In some embodiments of the present application, in order to better absorb the water sample containing air bubbles in the microbubble adsorption pipeline, the Y-shaped tee pipe is preferably placed vertically, and is located in the first Y-shaped inclined tee pipe and the top of the second Y-shaped inclined tee; in the Y-shaped tee, connect the upper nozzle to the adsorption tube, and connect the two lower nozzles to the first The outlet of the one-way valve and the outlet of the second one-way valve; the straight passages of the first Y-shaped inclined three-way pipe and the second Y-shaped inclined three-way pipe are preferably located on the same horizontal line.

In some embodiments of the present application, the bypass port is preferably opened on the tank wall of the water tank; the water outlet is preferably opened at the bottom of the water tank; the air collecting cover is preferably in the shape of an inverted funnel, and its central axis is preferably in the shape of an inverted funnel. Preferably, it is coaxial with the central axis of the bottom of the water tank, and the air collecting hood is higher than the bypass port and the water injection pipe, so as to accurately collect the air bubbles collected in the central area of the swirling water flow under the action of centrifugal force. water samples.

In some embodiments of the present application, the air bubble elimination device further includes a water outlet solenoid valve installed in the water outlet pipeline and a control system, the control system controls the water pumping process of the water pump, and controls the water pump to the water pump. When the water sample is pumped into the water tank, control the bypass solenoid valve to open, the siphon solenoid valve and the water outlet solenoid valve to close; when the water sample height in the water tank rises and is higher than the height of the gas collecting hood and the gas collecting pipe, the control The bypass solenoid valve is closed and the siphon solenoid valve is opened to generate a siphon force to suck the water sample collected by the gas collecting hood into the siphon pipeline; after the siphon solenoid valve is opened for a predetermined time, the water outlet solenoid valve is opened , so that the water sample in the water outlet pipeline flows through the microbubble adsorption pipeline, and under the action of the siphon force, the water sample containing bubbles flowing through the microbubble adsorption pipeline is sucked into the microbubble adsorption pipeline. In the siphon pipeline, the secondary elimination of the bubble water sample is realized, and then the purpose of completely eliminating the bubbles in the water sample is achieved.

In some embodiments of the present application, the bubble elimination device further includes a drain pipe connected to the water outlet pipeline, and a drain solenoid valve is installed on the drain pipe, and the control system does not need to continue to obtain bubble-free water samples When the pump is controlled, the water pump is controlled to be closed, and the drain solenoid valve is controlled to be opened, so that the water sample in the water tank is discharged through the water outlet pipeline and the drain pipe.

In some embodiments of the present application, it is preferable to extend the water injection pipe into the water tank, and the water injection pipe and the tangent of the tank wall of the water tank at the position of the water inlet preferably form an included angle of 30° to ensure a vortex Efficient generation of water flow.

In some embodiments of the present application, an overflow port is also provided on the water tank, and the height of the overflow port is higher than the height of the gas collecting hood and the gas collecting pipe, so that when the water sample is pumped too much, it can be timely Drain the water samples from the water tank to ensure that the acquisition process of bubble-free water samples can continue.

Compared with the prior art, the advantages and positive effects of the present invention are as follows: the air bubble elimination device of the present invention utilizes the principle of centrifugal force to effectively gather the air bubbles in the water sample in the water tank, utilizes the siphon effect to generate a stable negative pressure suction, and reduces the amount of air in the water tank. The bubbles are adsorbed in the first stage and discharged. At the same time, the micro-bubble adsorption pipeline is set to generate drag suction, and the micro-bubbles in the water sample after the first-stage bubble adsorption are adsorbed and discharged in the second stage, thereby realizing the effective removal of air bubbles in the water sample and improving the air bubble removal effect. The bubble elimination device of the invention can not only be used together with the existing hyperspectral water absorption attenuation measuring instrument AC-S, but also provides the measuring instrument AC-S with a bubble-free water sample to be measured, thereby improving the measurement accuracy of the water sample to be measured. and can be applied to other water measurement instruments or sensors based on optical principles, and has a wide range of applications.

Other features and advantages of the present invention will become more apparent upon reading the detailed description of the embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

1 is a schematic diagram of the overall structure of an embodiment of the bubble elimination device proposed by the present invention;

FIG. 2 is a schematic structural diagram of an embodiment of the water tank in FIG. 1;

Fig. 3 is the top view of Fig. 2;

FIG. 4 is a schematic structural diagram of an embodiment of the microbubble adsorption pipeline in FIG. 1 .

Detailed ways

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

It should be noted that, in the description of the present invention, the terms "upper", "lower", "inner", "outer" and other terms indicating a direction or a positional relationship are based on the direction or positional relationship shown in the drawings, which are only It is for ease of description, not to indicate or imply that the device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In this embodiment, in order to obtain ideal measurement results by injecting a non-bubble water sample to be measured when testing the water quality index of seawater, the hyperspectral water absorption attenuation measuring instrument AC-S, which is commonly used in the field of ocean observation, is proposed. A bubble elimination device, which can be used as a pre-processing device for the measuring instrument AC-S to pre-process the seawater samples to remove the bubbles in the seawater samples, and then solve the problem that the measuring instrument AC-S is affected by the seawater samples. The problem of reducing the accuracy of the measurement results due to the interference effect of air bubbles.

1-4, the bubble elimination device of this embodiment mainly includes a water tank 100, a water pump 113, a gas collecting cover 141, a siphon pipeline 200 and a microbubble adsorption pipeline 300 and other components. Wherein, the water tank 100 is used as a water sample chamber, and water sample inlets and outlets such as a water inlet 101 , a water outlet 102 , a bypass port 103 , and a gas collection port 104 are opened on the water tank 100 . The water inlet 101 is connected to the water inlet pipeline 110, and is connected to the water pump 113 through the water inlet pipeline 110 for pumping the water sample to be measured into the water tank 100; the water outlet 102 is connected to the water outlet pipeline 120 for pumping the water tank 100 The water sample to be tested after one time bubble adsorption is drawn out of the water tank 100; the bypass port 103 is connected to the siphon pipeline 200, and the water sample to be tested in the drainage water tank 100 is drained to generate a siphon effect; The air collecting pipe 142 may extend from the inside of the water tank 100 to the outside of the water tank 100 , and then be connected with the siphon pipe 200 . The air collecting pipe 142 is connected to the air collecting hood 141 inside the water tank 100 , and the water sample to be tested containing air bubbles in the water tank 100 is collected through the air collecting hood 141 and discharged from the water tank 100 under the action of the negative pressure suction generated by the siphon effect. The micro-bubble adsorption pipeline 300 is connected between the water outlet pipeline 120 and the siphon pipeline 200, and the siphon force generated by the siphon pipeline 200 is used to form a drag suction force in the micro-bubble adsorption pipeline 300, so as to be used for the passage of water in the water outlet pipeline 120. The water sample to be tested after the first bubble adsorption is subjected to the second bubble adsorption, and then the remaining tiny bubbles are removed to realize the output of a bubble-free water sample.

As a preferred embodiment, the water tank 100 of this embodiment is preferably designed in a cylindrical shape, including a tank bottom 106 and a tank wall 107 . Wherein, the water inlet 101 is preferably arranged on the tank wall 107 at a position where the tank wall 107 is inclined downward. The water inlet 101 is provided with a water injection pipe 109. The water injection pipe 109 preferably extends into the water tank 100 and is inclined relative to the tangent of the tank wall 107 at the water inlet 101 position, as shown in FIG. 3 . In some embodiments, the water injection pipe 109 can be set to form a 30° angle with the tangent of the tank wall 107 at the position of the water inlet 101 , so that the water sample to be tested pumped into the water tank 100 through the water injection pipe 109 can form a swirling water flow .

In this embodiment, as shown in FIG. 1 , the water injection pipe 109 is externally connected to a water inlet pipe 110 , and the water inlet pipe 110 includes a water inlet pipe 111 connected between the water injection pipe 109 and the water pump 113 , and a water inlet pipe 111 installed on the water inlet pipe 109 . The water inlet solenoid valve 112 on the water inlet pipe 111 .

The water outlet 102 is preferably opened at the bottom 106 of the water tank 100 . The bottom 106 of the tank may be a flat bottom, as shown in FIG. 1 , or a conical bottom, as shown in FIG. 2 . As a preferred embodiment, the water outlet 102 can be opened at the center of the box bottom 106, and the water outlet pipeline 120 can be externally connected. In this embodiment, as shown in FIG. 1 , the water outlet pipeline 120 includes a water outlet pipe 121 and a water outlet solenoid valve 122 installed on the water outlet pipe 121 . Specifically, one end of the water outlet pipe 121 can be connected to the water outlet 102 , the other end can be connected to the T-shaped tee pipe 125 (third T-shaped tee pipe), and the drain pipe can be connected through the straight pipe of the T-shaped tee pipe 125 123, a drain solenoid valve 124 can be installed on the drain pipe 123. The bypass port of the T-shaped three-way pipe 125 is used to connect the microbubble adsorption pipeline 300 .

The bypass port 103 is preferably opened on the tank wall 107 of the water tank 100 , preferably at a position where the tank wall 107 is inclined downward, and can be at the same level as the water inlet 101 , as shown in FIGS. 1 and 2 .

The air collecting port 104 is preferably opened on the tank wall 107 of the water tank 100, preferably at a position where the tank wall 107 is biased upward. In this embodiment, the position of the air collecting port 104 is higher than the air collecting hood 141 , and the positions of the air collecting hood 141 and the air collecting pipe 142 are both higher than the water inlet 101 and the bypass port 103 . The air collecting hood 141 is preferably designed in an inverted funnel shape, as shown in FIG. 2 and FIG. 3 , and the central axis of the air collecting hood 141 is preferably coaxial with the central axis of the tank bottom 106 of the water tank 100 . When the water sample to be tested pumped into the water tank 100 forms a swirling water flow, the power of the incoming water generates centrifugal force. Since the density of air bubbles is less than that of water, under the action of centrifugal force, the air bubbles in the water sample to be tested will be collected into the The central area of the swirling water flow, that is, the central position of the water tank 100 , eventually converges into the air collecting hood 141 as the water level rises, so that the air collecting hood 141 collects the bubble water samples.

As a preferred embodiment, a first siphon pipe 201 , a second siphon pipe 203 , a third siphon pipe 209 and a bypass pipe 206 are preferably provided in the siphon pipeline 200 , as shown in FIG. 1 . One end of the first siphon pipe 201 is connected to the gas collecting pipe 142 , the other end is connected to the second siphon pipe 203 through the straight pipe of the first T-shaped three-way pipe 202 , and the bypass pipe is connected to the bypass pipe through the bypass port of the first T-shaped three-way pipe 202 . 206 , the other end of the bypass pipe 206 is connected to the bypass port 103 of the water tank 100 , and a bypass solenoid valve 207 is also installed on the bypass pipe 206 . The second siphon pipe 203 is connected to the third siphon pipe 209 through the straight-through pipe of the second T-shaped tee pipe 204. The siphon solenoid valve 205 is installed on the second siphon pipe 203. Air bubble adsorption line 300 .

In order to improve the siphon force, this embodiment preferably configures the first siphon pipe 201 , the second siphon pipe 203 , the third siphon pipe 209 and the bypass pipe 206 with the same diameters (including the inner diameter and the outer diameter), and is larger than the diameter of the gas collecting pipe 142 ( Including inner diameter and outer diameter). The first siphon pipe 201 and the gas collecting pipe 142 are connected by the first reducing pipe 208, and the installation position of the first reducing pipe 208 is set to be lower than the bottom surface of the collecting hood 141 in height, as shown in FIG. 1 . When negative pressure is generated in the siphon pipe 200 due to the siphon effect, the siphon force can be amplified by the first reducing pipe 208 , so that the bubble water sample collected in the gas collecting hood 141 is adsorbed and discharged to the water tank 100 , and then enters the first siphon pipe through the gas collecting pipe 141 201 and the second siphon 203 are finally discharged through the third siphon 209.

As a preferred embodiment, the microbubble adsorption pipeline 300 is preferably provided with a first Y-shaped inclined three-way pipe 310, a second Y-shaped inclined three-way pipe 320, and a Y-shaped three-way three-way pipe 330, as shown in FIG. 1 and FIG. 4 shown. Wherein, the first Y-shaped inclined tee 310 includes two straight ports 311 and 312 and an inclined port 313, and connects the first straight port 311 to the water outlet pipeline 120. Specifically, it can be connected to the T-shaped tee 125. The bypass port, the second straight port 312 is connected to the second Y-shaped inclined three-way pipe 320 through the pipeline 340 , and the inclined port 313 is connected to the inlet of the first one-way valve 370 . Similarly, the second Y-shaped inclined tee 320 also includes two straight ports 321, 322 and an inclined port 323, wherein the first straight port 321 is connected to the bubble-free water outlet pipe 350, and the second straight port 322 is connected to the The pipeline 340 is described, and the inclined port 323 is connected to the inlet of the second one-way valve 380 . The Y-shaped three-way pipe 330 includes three nozzles 331 , 332 and 333 . One of the nozzles 333 is connected to the siphon pipeline 200 through the adsorption pipe 360 . Specifically, it can be connected to the bypass port of the second T-shaped three-way pipe 204 , and the other two The nozzles 331 and 332 are respectively connected to the outlet of the first check valve 370 and the outlet of the second check valve 380 in a one-to-one correspondence.

In this embodiment, the second straight openings of the first Y-shaped oblique tee 310 and the second Y-shaped oblique tee 320 both form acute angles with their own oblique openings, and the first Y-shaped oblique tee 310 It is on the same horizontal line as the straight-through pipe of the second Y-shaped inclined three-way pipe 320, and the Y-shaped three-way inclined three-way pipe 330 is located above the first Y-shaped inclined three-way pipe 310 and the second Y-shaped inclined three-way pipe 320. The ducts 310, 320, 330 form an upright triangular structure. The combination of the Y-shaped inclined three-way pipes 310 and 320 can produce a necking and confluence effect, so that the micro-bubbles condense; then, the negative pressure generated by the siphon in the siphon pipe 200 is used to flow the water outlet pipe 120 into the micro-bubble adsorption pipe. The water sample in the pipeline 300 forms a drag suction force, and then the remaining micro bubbles in the water sample flowing through the microbubble adsorption pipeline 300 can be adsorbed and discharged, so that the bubbles in the water sample flowing out through the bubble-free water outlet pipe 350 can be effectively removed. , to obtain a bubble-free water sample.

In order to further improve the bubble removal effect, this embodiment is preferably equipped with a first Y-shaped inclined tee 310, a second Y-shaped inclined tee 320, a Y-shaped tee 330, a pipeline 340, a bubble-free water outlet pipe 350 and an adsorption The diameter of the pipe 360 (including the inner diameter and the outer diameter) is smaller than the diameter (including the inner diameter and the outer diameter) of each water sample flowing through the siphon pipeline 200 and the water outlet pipeline 120, and a second reducing tube 210 is specifically arranged to connect the adsorption The bypass port of the pipe 360 and the second T-type tee pipe 204 is provided with a third reducing pipe 126 to connect the first straight port 311 of the first Y-type inclined tee pipe 310 and the bypass of the T-type tee pipe 125 The suction force is amplified through the reducing pipes 210 and 126, so as to realize the effective adsorption and discharge of bubble water.

The specific working process of the bubble elimination device of this embodiment will be described below with reference to FIG. 1 .

In order to make the bubble elimination device operate automatically, a control system is provided in the bubble elimination device in this embodiment.

After the device is powered on and running, the control system first controls the water inlet solenoid valve 112 and the bypass solenoid valve 207 to open, and the other solenoid valves are closed; then, the water pump 113 is started to extract the water sample to be tested, and the pump is pumped through the water inlet pipe 111 and the water injection pipe 109 Sent to tank 100. Since the water injection pipe 109 is installed tangentially inclined relative to the tank wall 107 of the water tank 100, the water sample to be tested is pumped into the water tank 100 to form a swirling water flow, which generates centrifugal force, so that the air bubbles in the water sample gather in the central area of the swirling water flow , and rises with the rise of the water level, and finally converges to the center of the air collecting hood 141 .

The control system controls the sampling time. When the height of the water sample to be tested exceeds the height of the gas collecting port 104, or after the water sample to be tested has not passed the gas collecting hood 141 and the gas collecting pipe 142, the control system controls the bypass solenoid valve 207 to close, and Open the siphon solenoid valve 205, so that the water samples in the gas collecting pipe 104, the first siphon pipe 201 and the bypass pipe 206 are discharged through the second siphon pipe 203, the second T-shaped three-way pipe 204 and the third siphon pipe 209 under the action of gravity , and then generate a siphon effect, and with the aid of the reducing effect of the first reducing pipe 208, the negative pressure suction force in the gas collecting hood 141 is increased, and the water sample with bubbles collected in the gas collecting hood 141 is removed from the water tank 100. It is extracted and discharged along the manifold 142 and the siphon line 200 .

After the control system controls the siphon solenoid valve 205 to open for a predetermined time (for example, 5 seconds), it controls the water outlet solenoid valve 122 to open, and the water sample to be tested in the water tank 100 after being adsorbed by air bubbles flows in and out through the water outlet 102 under the action of gravity. The water pipe 121 enters the microbubble adsorption pipeline 300 through the T-shaped tee pipe 125 . Because the water sample flows through the siphon pipe 200, and with the help of the diameter-reducing effect of the second reducing pipe 210, the Y-shaped three-way pipe 330 forms a negative pressure at its nozzle 333, which generates an adsorption force, and then enters the first reducing pipe 330. The water sample to be tested in the Y-shaped inclined three-way pipe 310 is divided into two paths. The water sample with a small amount of bubbles enters the Y-shaped three-way pipe 330 through the first one-way valve 370, and the other one enters the second Y-shaped inclined pipe through the pipeline 340. Tee 320. The water sample entering the second Y-shaped inclined three-way pipe 320 is divided into two paths again. If there are still air bubbles in the water sample, the part of the air bubbles will enter the Y-shaped three-way pipe through the second one-way valve 380 along with one of the water samples. 330, and the other water sample flows out through the bubble-free water outlet pipe 350. The bubble-free water outlet pipe 350 can be connected to the hyperspectral water absorption attenuation measuring instrument AC-S, so as to provide a bubble-free water sample to be measured for the hyperspectral water absorption attenuation measuring instrument AC-S, so as to improve the accuracy of water quality measurement.

The water sample to be tested sucked into the Y-shaped tee pipe 330 enters the third siphon pipe 209 through the adsorption pipe 360 and is discharged through the third siphon pipe 209 . The first one-way valve 370 and the second one-way valve 380 are arranged in the microbubble adsorption pipeline, which can ensure that the water sample in the siphon pipeline 200 will not enter the first Y-shaped inclined three-way pipe 310 and the second Y-shaped inclined three-way pipe 310 Through tube 320.

After the hyperspectral water absorption attenuation measuring instrument AC-S completes the measurement, the control system controls the water pump 113 to close, opens the drain solenoid valve 124, and discharges the water sample in the water tank 100 through the water outlet pipe 121 and the drain pipe 123.

In this embodiment, an overflow port 105 is provided on the upper part of the water tank 100, and the position of the overflow port 105 should be higher than the position of the air collecting port 104, which can not only prevent the water sample in the water tank 100 from overflowing, but also ensure that the water sample enters the microbubble adsorption tube. When the road is 300, the discharge speed can be automatically adjusted.

Of course, the above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications can be made without departing from the principles of the present invention. , these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims (9)

1. a bubble elimination device for water sample optical measurement method, is characterized in that, comprises: The water tank is cylindrical, with a water inlet opening on the tank wall, and a water injection pipe is installed in the water inlet. The water sample in the water tank forms a swirling water flow; a water outlet is provided on the water tank, and the water outlet is connected to a water outlet pipeline; a water pump, which is connected to the water injection pipe through a water inlet pipe, and is used for pumping the water sample into the water tank; an air collecting hood, which is built in the water tank and is used for collecting water samples in the water tank where the swirling water flow is located in the central area; the air collecting hood is connected to an air collecting pipe, and the air collecting pipe extends to the outside of the water tank; a siphon pipeline, which is connected to the gas collecting pipe, and is used for discharging the water sample collected by the gas collecting hood out of the water tank under the action of siphon force; A microbubble adsorption pipeline, which is connected between the water outlet pipeline and the siphon pipeline, is used for sucking the water sample containing bubbles in the water outlet pipeline into the siphon pipeline under the action of siphon force; it includes: The first Y-shaped inclined three-way pipe includes a first straight port, a second straight port and an inclined port, the first straight port is connected to the water outlet pipeline, and the inclined port is connected to the first one-way port valve inlet; The second Y-shaped inclined tee includes a first straight port, a second straight port and an inclined port, and the first straight port of the second Y-shaped inclined tee is used to discharge the air after removing the bubbles. Water sample, the second straight port of the second Y-shaped inclined tee is connected to the second straight port of the first Y-shaped inclined three-way pipe, and the inclined port of the second Y-shaped inclined three-way pipe is connected to the inlet of the second one-way valve; The Y-shaped three-way pipe includes three nozzles, one of which is connected to the siphon pipeline, and the other two nozzles are respectively connected to the outlet of the first one-way valve and the outlet of the second one-way valve in one-to-one correspondence; Wherein, a bypass port is opened on the water tank, the siphon pipeline is connected to the bypass port, and when the water sample in the water tank flows through the siphon pipeline through the bypass port, a negative pressure is generated in the gas collecting pipe pressure, draw the water sample collected by the hood. 2 . The air bubble elimination device according to claim 1 , wherein the siphon pipe comprises a first siphon pipe, a second siphon pipe, a third siphon pipe and a bypass pipe; one end of the first siphon pipe is connected to the gas collecting pipe. 3 . , the other end is connected to the second siphon pipe through the straight pipe of the first T-shaped tee pipe, and the second siphon pipe is connected to the third siphon pipe through the straight pipe of the second T-shaped tee pipe; the bypass pipe is connected Between the bypass port on the water tank and the bypass port of the first T-shaped three-way pipe, a bypass solenoid valve is installed on the bypass pipe; a siphon is installed on the second siphon pipe Solenoid valve; the bypass port of the second T-shaped tee pipe is connected to the Y-shaped tee pipe in the micro-bubble adsorption pipeline through an adsorption pipe. 3. The device for eliminating air bubbles according to claim 2, characterized in that, In the siphon pipeline, the calibers of the first siphon pipe, the second siphon pipe, the third siphon pipe and the bypass pipe are equal, and all are larger than the calibers of the gas collecting pipe and the adsorption pipe; The first siphon pipe is connected to the gas collecting pipe through a first reducing pipe, and the height of the first reducing pipe is lower than the height of the gas collecting hood; The bypass port of the second T-shaped three-way pipe is connected to the adsorption pipe through a second reducing pipe. 4. The bubble elimination device according to claim 3, characterized in that, in the microbubble adsorption pipeline, the Y-shaped three-way pipe is placed vertically, and is located between the first Y-shaped inclined three-way pipe and the Above the second Y-shaped inclined three-way pipe; in the Y-shaped three-way pipe, the nozzle located above is connected to the adsorption pipe, and the two nozzles located below are respectively connected to the outlet of the first one-way valve and the outlet of the second one-way valve; the straight passages of the first Y-shaped inclined three-way pipe and the second Y-shaped inclined three-way pipe are located on the same horizontal line. 5 . The air bubble elimination device according to claim 2 , wherein the bypass port is provided on the wall of the water tank; the water outlet is provided on the bottom of the water tank; the air collecting hood is in the shape of an inverted funnel. 6 . , the central axis of which is coaxial with the central axis of the bottom of the water tank, and the air collecting cover is higher than the bypass port and the water injection pipe. 6. The bubble elimination device according to any one of claims 2 to 5, characterized in that, further comprising: a water outlet solenoid valve, which is installed in the water outlet pipeline; A control system, which controls the pumping process of the water pump, and controls the bypass solenoid valve to open, the siphon solenoid valve and the water outlet solenoid valve to close when the water pump is controlled to pump water samples into the water tank; When it rises and is higher than the height of the gas collecting hood and the gas collecting pipe, the bypass solenoid valve is controlled to close and the siphon solenoid valve is opened to generate siphon force, so as to suck the water sample collected by the gas collecting hood into the siphon pipeline ; After the siphon solenoid valve is opened for a predetermined time, the water outlet solenoid valve is opened, so that the water sample in the water outlet pipeline flows through the microbubble adsorption pipeline, and under the action of the siphon force, the water sample will flow through the microbubble adsorption pipeline. The water sample containing bubbles in the microbubble adsorption pipeline is sucked into the siphon pipeline. 7. The bubble elimination device according to claim 6, characterized in that, further comprising: A drain pipe, which is connected to the water outlet pipeline, and a drain solenoid valve is installed on the drain pipe, and the control system controls the water pump to turn off and controls the drain solenoid valve when there is no need to continue to obtain bubble-free water samples Open, so that the water sample in the water tank is discharged through the water outlet pipe and the drain pipe. 8 . The air bubble elimination device according to claim 1 , wherein the water injection pipe extends into the water tank, and the water injection pipe and the tank wall of the water tank are at the water inlet position. 9 . The tangents form an included angle of 30°. 9. The air bubble elimination device according to any one of claims 1 to 5, wherein an overflow port is also provided on the water tank, and the height of the overflow port is higher than that of the gas collecting hood and the gas collecting pipe the height of.

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