CN213813438U

CN213813438U - Dissolved oxygen measuring probe

Info

Publication number: CN213813438U
Application number: CN202022367104.XU
Authority: CN
Inventors: 邵婷; 贺敬星
Original assignee: Feiming Scientific Instrument Wuhan Co ltd
Current assignee: Feiming Scientific Instrument Wuhan Co ltd
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2021-07-27
Anticipated expiration: 2030-10-22

Abstract

The utility model relates to a dissolved oxygen measuring probe, which comprises a dissolved oxygen sensor, a stirring mechanism and a data power supply composite line, wherein the bottom of the dissolved oxygen sensor is provided with an oxygen permeation film, the stirring mechanism is arranged outside the bottom of the dissolved oxygen sensor, and the dissolved oxygen sensor is externally connected with a control terminal through the data power supply composite line; the stirring mechanism comprises a rotating motor, a stirring shaft and stirring rods, wherein the rotating motor is vertically arranged outside the dissolved oxygen sensor and is located inside the outer protective shell, the stirring shaft is vertically arranged at the bottom output end of the rotating motor, the outer protective shell is run through the bottom of the stirring shaft, a plurality of stirring rods are horizontally arranged outside the bottom end of the stirring shaft, and the rotating motor is used for driving the stirring shaft to rotate so as to drive the stirring rods to rotate on the horizontal plane. The dissolved oxygen probe cleans the oxygen permeation film and stirs water near the probe, so that the water fluidity is improved, and the measurement precision is improved.

Description

Dissolved oxygen measuring probe

Technical Field

The utility model relates to a water quality monitoring equipment technical field, specific saying is a dissolved oxygen measuring probe.

Background

Dissolved Oxygen (DO) is Oxygen Dissolved in water in a molecular state, and is an indispensable condition for living organisms in water. In the fields of environmental water quality monitoring, wastewater treatment, sewage aeration, boiler water deoxidation, dissolved oxygen control in the fermentation industry, metal element extraction and the like, the dissolved oxygen is an important water quality parameter; in the seawater and fresh water aquaculture industry, the dissolved oxygen concentration is directly related to the growth condition of aquatic organisms and is an important parameter which needs to be controlled in the dissolved oxygen detection of the aquatic organism growth environment, so that the improvement of the measurement precision of the dissolved oxygen concentration has important practical significance.

The membrane electrode method is mainly used for actually detecting the concentration of dissolved oxygen in water. The working principle is that oxygen permeates through a diaphragm and is reduced by a working electrode to generate diffusion current which is in direct proportion to the oxygen concentration, and the concentration of the dissolved oxygen in the water is obtained by measuring the diffusion current. According to the difference of measurable concentration, the membrane electrode method for measuring dissolved oxygen is divided into a galvanic cell type and a polarographic type. The galvanic cell uses silver as the anode and lead as the cathode. The anode and silver electrodes were immersed in a potassium hydroxide cell to form two half-cells, the outer layers also being sealed with a film. The dissolved oxygen is reduced at the anode to generate a diffusion current, and the concentration of the dissolved oxygen can be obtained by measuring the diffusion current.

Polarographic membrane electrode is prepared by polarographic (polarographic): in the electrode, a gold (Au) ring or a platinum (Pt) gold ring is used as a cathode; silver-silver chloride (or mercury-mercurous chloride) is used as the anode. The electrolyte is potassium chloride solution. The outer surface of the cathode is covered with an oxygen permeable film. The film can be made of air-permeable materials such as polytetrafluoroethylene, polyvinyl chloride, polyethylene, silicon rubber and the like. A polarization voltage of 0.5-0.8V is applied between the cathode and the anode. When the dissolved oxygen penetrates through the film and reaches the surface of the gold cathode, the film blocks the liquid communication between the inside and the outside of the electrode, so that the dissolved oxygen in water permeates into the inside of the electrode, and the concentration of the dissolved oxygen can be known by measuring diffusion current through an external circuit.

In the polarographic dissolved oxygen instrument in the prior art, due to the interference of factors such as the permeability of a membrane, the reaction rate of oxygen, SO2, Cl2, Br2, I2, water vapor, algae and the like, the measured result of the dissolved oxygen (Do) in water is small, and accurate dissolved oxygen data cannot be obtained. If the dissolved oxygen meter is continuously monitored on line for a long time, pollutants in water can be attached to the surface of the film to block the film, even microorganisms in water can be attached to the surface of the film to form a layer of biological film, the dissolved oxygen measurement is seriously interfered, and finally the dissolved oxygen meter loses the effect.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to above not enough, provide a dissolved oxygen measuring probe, this dissolved oxygen probe clearance oxygen permeation film to near stirring probe water improves the mobility of water, improves measurement accuracy.

For solving the technical problem, the utility model discloses a following technical scheme:

a dissolved oxygen measuring probe comprises a dissolved oxygen sensor, a stirring mechanism and a data power supply composite wire, wherein an oxygen permeation film is arranged at the bottom of the dissolved oxygen sensor, the stirring mechanism is arranged on the outer side of the bottom of the dissolved oxygen sensor, and the dissolved oxygen sensor is externally connected with a control terminal through the data power supply composite wire;

the utility model discloses a stirring device for oxygen sensor, including (mixing) shaft, stirring mechanism, dissolved oxygen sensor, stirring shaft bottom, stirring shaft and stirring rod, the rotating electrical machines is vertical to be set up in the dissolved oxygen sensor outside and to be located the outer protective housing inboard, the (mixing) shaft is vertical to be set up in the bottom output of rotating electrical machines, the (mixing) shaft bottom runs through the outer protective housing, the even level in (mixing) shaft bottom outside is provided with a plurality of puddlers, the rotating electrical machines is used for driving the (mixing) shaft rotation to rotate on the horizontal plane in order to drive the puddler, the puddler is located oxygen permeation film next door.

Further, the top of puddler is provided with flexible brush, the up end of flexible brush and the lower terminal surface parallel and level of oxygen permeation film, dissolved oxygen sensor's bottom is located the oxygen permeation film outside and has seted up the arc wall, the one end of arc wall all communicates with the oxygen permeation film, and other end intercommunication dissolved oxygen sensor's side, flexible brush can remove in the arc wall when rotating, the centre of a circle of arc wall is located the axis of adjacent one side (mixing) shaft.

Furthermore, there are two sets of stirring mechanisms and arc-shaped grooves, and the two sets of stirring mechanisms and the arc-shaped grooves are symmetrically arranged on two sides of the dissolved oxygen sensor.

Further, the outside of outer protective housing is provided with outer fender bracket, outer fender bracket includes interior fixed cover, outer fixed cover and connecting rod, the outer protective housing outside evenly is provided with a plurality of connecting rods along the axis, the both ends and the middle part of connecting rod are provided with outer fixed cover, outer fixed cover is used for fixed connection pole, interior fixed cover includes two, two interior fixed cover sets up in the outer protective housing outside, interior fixed cover passes through the horizontal pole and connects outer fixed cover.

Further, sealing rings are arranged in gaps between the bottom and the top of the outer protective shell and the dissolved oxygen sensor.

The utility model adopts the above technical scheme after, compare with prior art, have following advantage:

because the dissolved oxygen can be consumed in the testing process, the measured data can be lower than the actual data, the utility model discloses a stirring mechanism stirs the water sample near the probe to improve the measured data precision;

the upper surface of the stirring rod is provided with the flexible brush, and when the stirring rod is driven by the rotating motor to rotate, the surface of the oxygen permeable film is cleaned through the brush, so that attachments on the surface of the oxygen permeable film can be removed, and the accuracy of a detection result is improved;

the outer protective housing outside is provided with outer fender bracket, can protect rabbling mechanism, avoids floater or fish to damage rabbling mechanism under water, improves the utility model discloses a life.

The present invention will be described in detail with reference to the accompanying drawings and examples.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic partial cross-sectional view of the present invention;

fig. 3 is a schematic perspective view of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a dissolved oxygen sensor; 11. an oxygen permeable film; 12. an arc-shaped slot; 2. a stirring mechanism; 21. a rotating electric machine; 22. a stirring shaft; 23. a stirring rod; 24. a flexible brush; 3. a data power supply composite wire; 4. an outer protective shell; 5. an outer fender bracket; 51. an inner fixing sleeve; 52. an outer fixing sleeve; 53. a connecting rod; 54. a cross bar.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

As shown in fig. 1 and 2, a dissolved oxygen measuring probe comprises a dissolved oxygen sensor 1, a stirring mechanism 2 and a data power composite line 3, wherein an oxygen permeable film 11 is arranged at the bottom of the dissolved oxygen sensor 1, the stirring mechanism 2 is arranged at the outer side of the bottom of the dissolved oxygen sensor 1, and the dissolved oxygen sensor 1 is externally connected with a control terminal through the data power composite line 3;

the dissolved oxygen sensor 1 bottom outside is provided with outer protective housing 4, rabbling mechanism 2 includes rotating electrical machines 21, (mixing) shaft 22 and puddler 23, rotating electrical machines 21 is vertical to be set up and to be located outer protective housing 4 inboard in the dissolved oxygen sensor 1 outside, the vertical bottom output that sets up in rotating electrical machines 21 of (mixing) shaft 22, outer protective housing 4 is run through to the (mixing) shaft 22 bottom, the even level in (mixing) shaft 22 bottom outside is provided with a plurality of puddlers 23, rotating electrical machines 21 is used for driving the (mixing) shaft 22 rotation and rotates on the horizontal plane in order to drive puddler 23, the puddler is located oxygen permeation film 11 next door.

As an implementation mode, the top of the stirring rod 23 is provided with a flexible brush 24, the upper end face of the flexible brush 24 is flush with the lower end face of the oxygen permeable film 11, the bottom of the dissolved oxygen sensor 1 is located outside the oxygen permeable film 11, an arc-shaped groove 12 is formed in the bottom, one end of the arc-shaped groove 12 is communicated with the oxygen permeable film 11, the other end of the arc-shaped groove is communicated with the side face of the dissolved oxygen sensor 1, the flexible brush 24 can move in the arc-shaped groove 12 when rotating, and the circle center of the arc-shaped groove 12 is located on the axis of the stirring shaft 22 on one adjacent side.

As an implementation mode, there are two groups of stirring mechanisms 2 and arc-shaped grooves 12, and the two groups of stirring mechanisms 2 and arc-shaped grooves 12 are symmetrically arranged on two sides of the dissolved oxygen sensor 1;

during the use, driving motor drives the (mixing) shaft rotation and rotates in order to drive the puddler and rotate on the horizontal plane, and the puddler of dissolved oxygen sensor both sides rotates in turn, and direction of rotation is opposite, stirs the other water sample of measuring probe to improve measured data precision, the flexible brush of puddler upper surface can move along the arc wall, and the attachment on clearance oxygen permeation film surface, thereby makes the testing result more accurate.

As shown in fig. 3, as an embodiment, an outer protection frame 5 is disposed on the outer side of the outer protection shell 4, the outer protection frame 5 includes an inner fixing sleeve 51, an outer fixing sleeve 52 and a connecting rod 53, a plurality of connecting rods 53 are uniformly disposed on the outer side of the outer protection shell 4 along the axis, the outer fixing sleeves 52 are disposed at two ends and in the middle of the connecting rod 53, the outer fixing sleeve 52 is used for fixing the connecting rod 53, the inner fixing sleeve 51 includes two inner fixing sleeves 51 disposed on the outer side of the outer protection shell 4, and the inner fixing sleeves 51 are connected to the outer fixing sleeves 52 through a cross rod 54.

As an implementation mode, sealing rings are arranged in gaps between the bottom and the top of the outer protection shell 4 and the dissolved oxygen sensor 1, and the bottom of the outer protection shell 4 is positioned outside the stirring shaft and is arranged on the sealing rings to prevent water from entering the outer protection shell.

The foregoing is illustrative of the best mode of the invention, and details not described herein are within the common general knowledge of a person of ordinary skill in the art. The protection scope of the present invention is subject to the content of the claims, and any equivalent transformation based on the technical teaching of the present invention is also within the protection scope of the present invention.

Claims

1. The dissolved oxygen measuring probe is characterized by comprising a dissolved oxygen sensor (1), a stirring mechanism (2) and a data power supply composite wire (3), wherein an oxygen permeation film (11) is arranged at the bottom of the dissolved oxygen sensor (1), the stirring mechanism (2) is arranged on the outer side of the bottom of the dissolved oxygen sensor (1), and the dissolved oxygen sensor (1) is externally connected with a control terminal through the data power supply composite wire (3);

dissolved oxygen sensor (1) bottom outside is provided with outer protective housing (4), rabbling mechanism (2) are including rotating electrical machines (21), (mixing) shaft (22) and puddler (23), rotating electrical machines (21) are vertical to be set up and to be located outer protective housing (4) inboard in dissolved oxygen sensor (1) outside, (mixing) shaft (22) are vertical to be set up in the bottom output of rotating electrical machines (21), outer protective housing (4) is run through to (mixing) shaft (22) bottom, the even level in (mixing) shaft (22) bottom outside is provided with a plurality of puddlers (23), rotating electrical machines (21) are used for driving (mixing) shaft (22) rotation in order to drive puddler (23) to rotate on the horizontal plane, puddler (23) are located oxygen permeation film (11) next door.

2. The dissolved oxygen measuring probe according to claim 1, wherein a flexible brush (24) is arranged at the top of the stirring rod (23), the upper end face of the flexible brush (24) is flush with the lower end face of the oxygen permeable film (11), the bottom of the dissolved oxygen sensor (1) is positioned outside the oxygen permeable film (11) and is provided with an arc-shaped groove (12), one end of the arc-shaped groove (12) is communicated with the oxygen permeable film (11), the other end of the arc-shaped groove is communicated with the side face of the dissolved oxygen sensor (1), the flexible brush (24) can move in the arc-shaped groove (12) when rotating, and the circle center of the arc-shaped groove (12) is positioned on the axis of the stirring shaft (22) on one adjacent side.

3. The dissolved oxygen measuring probe according to claim 2, wherein the stirring mechanisms (2) and the arc-shaped grooves (12) are arranged in two groups, and the two groups of stirring mechanisms (2) and the arc-shaped grooves (12) are symmetrically arranged on two sides of the dissolved oxygen sensor (1).

4. The dissolved oxygen measuring probe according to claim 1, wherein an outer protective frame (5) is arranged on the outer side of the outer protective shell (4), the outer protective frame (5) comprises an inner fixed sleeve (51), an outer fixed sleeve (52) and connecting rods (53), a plurality of connecting rods (53) are uniformly arranged on the outer side of the outer protective shell (4) along the axis, the outer fixed sleeves (52) are arranged at the two ends and the middle part of each connecting rod (53), the outer fixed sleeves (52) are used for fixing the connecting rods (53), the inner fixed sleeves (51) comprise two inner fixed sleeves (51), the two inner fixed sleeves (51) are arranged on the outer protective shell (4), and the inner fixed sleeves (51) are connected with the outer fixed sleeves (52) through cross rods (54).

5. The dissolved oxygen measurement probe according to claim 1, wherein sealing rings are provided in the gaps between the bottom and top of the outer protective shell (4) and the dissolved oxygen sensor (1).