CN214427416U - Metering calibration device for dissolved oxygen tester - Google Patents
Metering calibration device for dissolved oxygen tester Download PDFInfo
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- CN214427416U CN214427416U CN202120317116.3U CN202120317116U CN214427416U CN 214427416 U CN214427416 U CN 214427416U CN 202120317116 U CN202120317116 U CN 202120317116U CN 214427416 U CN214427416 U CN 214427416U
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Abstract
The utility model belongs to the technical field of equipment for measurement calibration, a dissolved oxygen apparatus equipment is related to, especially a measurement calibrating device for dissolved oxygen apparatus. The measuring tank comprises a measuring tank, wherein the lower part of the measuring tank is a conical part, the upper part of the measuring tank is a cylindrical part, the conical part and the cylindrical part are integrally manufactured, a partition plate is integrally installed at the connecting position of the conical part and the cylindrical part along the radial direction, a plurality of aeration holes are uniformly formed in the partition plate at intervals, the conical part and the cylindrical part are communicated through the aeration holes, clear water is contained in the conical part and the cylindrical part, an air guide port is manufactured at the end part of the conical part and communicated with an external air source through a pipeline, a fixing plate is installed at the upper end of the cylindrical part along the radial direction, a plurality of through holes are manufactured in the fixing plate at intervals, and a plurality of hollow pipes are integrally installed on the lower end surface of the fixing plate along the inner diameter of each through hole downwards.
Description
Technical Field
The utility model belongs to the technical field of equipment for measurement calibration, a dissolved oxygen apparatus equipment is related to, especially a measurement calibrating device for dissolved oxygen apparatus.
Background
The molecular oxygen dissolved in water is called dissolved oxygen and is generally referred to as DO. Expressed in milligrams of oxygen per liter of water. Dissolved oxygen in water generally comes from two sources: oxygen dissolved in water in the air and oxygen generated by photosynthesis of plants in the water. The dissolved oxygen of surface water is usually in a saturated state when algae are growing in the water body. The concentration of dissolved oxygen is usually in a supersaturated state, and when the water is affected by oxidizing substances, the concentration of dissolved oxygen in the water is lower than the saturated state, and in addition, the content of dissolved oxygen in the water is affected by water temperature, atmospheric pressure and solute (such as salt), and decreases with the increase of water temperature, and increases in proportion to the oxygen partial pressure in the atmosphere. The dissolved oxygen content in the water body is important detection content in multiple industries, such as aquaculture, tap water production, sewage treatment, environmental monitoring, chemical production and the like, the quality of the water body is judged according to the dissolved oxygen content, the self-purification capacity of the water body can be detected, and the condition of a water body ecosystem is known. In aquaculture industry, when the content of dissolved oxygen in water is too low, the majority of cultured products such as fish and the like die, and economic loss is caused. In the biochemical treatment process of wastewater, the dissolved oxygen is also an important control index, and the content of the dissolved oxygen directly influences the survival of aerobic bacteria and anaerobic bacteria, thereby influencing the wastewater treatment effect.
The dissolved oxygen tester is a professional analytical instrument for measuring the oxygen content in water, is widely applied to the industries of environmental monitoring, tap water production, environmental protection, aquaculture and the like, and has great influence on production life and environment law enforcement supervision due to the accuracy of the measured data of the dissolved oxygen tester.
The conventional metering and calibrating device for the dissolved oxygen measuring instrument comprises a constant-temperature water tank, a bubbler, a thermometer and the like, wherein a standard saturated oxygen solution is prepared after the bubbler continuously aerates the constant-temperature water tank for 2-3 hours and is stabilized, the standard concentration value of the saturated dissolved oxygen in water is calculated according to the saturated concentration values of the oxygen in the water with different water temperatures and atmospheric pressures and an interpolation method, and then the metering and calibrating device for the dissolved oxygen measuring instrument is carried out. Because a large amount of air or oxygen needs to be filled into the constant-temperature water tank, a large amount of oxygen needs to be consumed due to a large volume in the water tank, so that standard gas is wasted, the working efficiency is influenced due to long aeration time, and in addition, the measurement accuracy is not enough due to the fact that the oxygen content in water is not uniform due to insufficient aeration time.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide one kind and save standard gas, shorten the aeration time, the aeration is even, can examine and determine many dissolved oxygen apparatus simultaneously, extensive applicability's a measurement calibrating device for dissolved oxygen apparatus.
The utility model discloses a realize through following technical scheme:
a measurement calibration device for a dissolved oxygen meter, characterized in that: the device comprises a measuring tank, wherein the lower part of the measuring tank is a conical part, the upper part of the measuring tank is a cylindrical part, the conical part and the cylindrical part are integrally manufactured, a partition plate is integrally installed at the connecting position of the conical part and the cylindrical part along the radial direction, a plurality of aeration holes are uniformly formed in the partition plate at intervals, the conical part and the cylindrical part are communicated through the aeration holes, clear water is contained in the conical part and the cylindrical part, an air guide port is formed at the end part of the conical part and communicated with an external air source through a pipeline 1, a fixing plate is installed at the upper end of the cylindrical part along the radial direction, a plurality of through holes are formed in the fixing plate at intervals, a plurality of hollow pipes are integrally installed on the lower end surface of the fixing plate along the inner diameter of each through hole downwards, each hollow pipe extends along the axial direction of the cylindrical part, a gap exists between the lower end part of each hollow pipe and the partition plate, and the gap position and the radially external area of each hollow pipe are arranged as a gas-liquid mixing cavity, the gas-liquid mixing cavity is communicated with the conical part through an aeration hole formed in the partition plate.
Furthermore, a flow valve is installed in a pipeline between the gas source and the measuring pool.
Further, the measuring cell is placed in a thermostatic assembly for providing a stable heat source to the measuring cell.
Furthermore, the constant temperature assembly comprises a constant temperature tank, the constant temperature tank is used for containing heating liquid, and the bottom of the measuring tank is immersed in the heating liquid, so that the heating liquid does not flow back to the hollow pipe manufactured by the measuring tank.
Furthermore, the thermostatic bath is of an open structure, a cover plate is installed at the open position of the thermostatic bath, through holes are formed in the orthographic projection positions above all hollow pipes manufactured in the cover plate in the measuring cell, and electrodes of dissolved oxygen measuring instruments to be detected are inserted into the through holes.
Furthermore, a liquid outlet is formed at the bottom of the thermostatic pool, and a liquid valve is installed at the position of the liquid outlet.
Further, a heat source and a temperature detection device are installed in the constant temperature pool.
Furthermore, the heat source adopts a heating rod, the temperature detection device adopts a thermometer, and the heating end of the heating rod and the detection end of the thermometer are inserted into the constant temperature pool.
The utility model has the advantages that:
the utility model discloses in, designed a measuring tank specially, the measuring tank adopt integrative structure of making of toper portion and cylindricality portion, the bottom of its toper portion is used for letting in gas, the tubaeform structure that the bubble was followed the toper portion leads and spreads and the aeration hole speed reduction of making through the baffle is broken up, makes it in gas-liquid mixture intracavity and built-in clear water intensive mixing, gets into a plurality of liquid columns in the corresponding hollow tube respectively at last, the aeration is more even. The measuring tank adopts the matching of the cylindrical part and the conical part to occupy partial internal space, and compared with the traditional water tank with the same height and the same inner diameter, the water quantity contained in the measuring tank is less, so that the standard gas required by aeration is less, and the aeration time is also shorter. Meanwhile, each hollow pipe forms isolation, electrodes of the dissolved oxygen measuring instrument to be detected can be placed in each hollow pipe, the electrodes cannot be in contact with each other, and oxygen below the liquid column cannot be consumed in a short time, so that a plurality of dissolved oxygen measuring instruments can be simultaneously detected.
In this embodiment, fixed plate and measuring cell can adopt movable mounting's mode, the fixed plate can be replaced, the through-hole quantity of making in every fixed plate, the internal diameter all can design according to the electrode size of the dissolved oxygen apparatus of examining to examine with supporting hollow tube, adaptability is wide.
The utility model discloses in, install the flow valve in the pipeline between air supply and measuring cell for flow to gas is controlled, then should promote gaseous flow when hollow pipe quantity is many, then should reduce gaseous flow when hollow pipe quantity is few, and it is suitable to be in the saturated condition with the clear water.
The utility model discloses in, adopt constant temperature subassembly to heat the measuring cell, this constant temperature subassembly adopts the constant temperature pond to carry out water bath heating to the measuring cell for the temperature in the promotion measuring cell reaches the optimum temperature, makes it can reach saturated condition with dissolved oxygen. The heating rod and the thermometer are arranged in the constant temperature pool instead of the measuring pool, the clear water used in the measuring pool is small in volume, the temperature is easy to produce when the clear water is heated, and the clear water is not easy to control. And the constant temperature pond then accessible heat-conduction mode realize with the constant temperature of measuring cell, and the cooperation apron uses the heat to scatter and disappear more slowly, and the constant temperature effect is better.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention is further illustrated by the following examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
The utility model provides a measurement calibrating device for dissolved oxygen apparatus, the innovation of the utility model lies in, including a measuring tank 10, the measuring tank lower part is toper portion, and upper portion is cylindricality portion, and this toper portion and cylindricality portion are integrative to be made, a baffle 12 is installed along the integrative radial direction in the hookup location of toper portion and cylindricality portion, and a plurality of aeration holes 11 are made at even interval in this baffle, the aeration hole switches on toper portion and cylindricality portion, all is used for holding the clear water in toper portion and the cylindricality portion, a gas guide mouth is made to the tip of toper portion, and this gas guide mouth switches on through pipeline and outside air supply 15, a fixed plate is installed along the radial direction in the upper end of cylindricality portion, and a plurality of through-holes are made at the interval in this fixed plate, a plurality of hollow tubes are installed along the internal diameter of each through-hole downwards an organic whole to the terminal surface under the fixed plate, and every hollow tube all extends along the axial direction of cylindricality portion, a gap exists between the lower end part of the hollow pipe and the partition plate, a gas-liquid mixing cavity 9 is arranged at the gap position and the area outside the hollow pipe in the radial direction, and the gas-liquid mixing cavity is communicated with the conical part through an aeration hole formed in the partition plate.
In this embodiment, the hollow tube is hollow and has two open ends.
In this embodiment, a through thermometer insertion hole 6 is preferably formed in the fixing plate beside the through hole, into which a measuring cell thermometer can be inserted, and the detection end of the measuring cell thermometer is extended below the liquid level of the gas-liquid mixing chamber of the measuring cell, so as to detect the temperature in the measuring cell in real time.
In this embodiment, a flow valve 2 is installed in a pipeline between the gas source and the measuring cell.
In this embodiment, the gas source may be a gas pump or a gas tank with standard gas inside.
In this embodiment, the cell is supported by a support 13 and placed in a thermostatic assembly which provides a stable heat source to the cell.
In this embodiment, the constant temperature assembly includes a constant temperature tank 14 for containing a heating liquid, and the bottom of the measuring tank is immersed in the heating liquid, so that the heating liquid does not flow back into a hollow tube formed by the measuring tank.
In this embodiment, the thermostatic bath is open structure, installs apron 4 in its uncovered position, the orthographic projection position of every hollow tube top that the measuring cell was made in the apron all makes through-hole 5, is used for inserting the electrode of waiting to examine dissolved oxygen apparatus in this through-hole. And a through hole with corresponding size is also formed at the position of the cover plate above the thermometer inserting hole.
In this embodiment, a liquid outlet is formed at the bottom of the thermostatic pool, and a liquid valve 8 is installed at the liquid outlet.
In this embodiment, a heat source and a temperature detection device are installed in the constant temperature tank.
In this embodiment, the heat source is a heating rod 7, the temperature detection device is a thermometer 3, and the heating end of the heating rod and the detection end of the thermometer are inserted into the thermostatic bath.
The utility model discloses a use is:
the utility model discloses in, be used for letting in gas or standard gas (like oxygen) in the bottom of toper portion, the tubaeform structure that the bubble was followed the toper portion leads and spreads to the aeration hole speed reduction that makes through the baffle is broken up, makes it in gas-liquid mixture intracavity and built-in clear water intensive mixing, gets into corresponding hollow tube respectively at last and forms a plurality of liquid columns, and the aeration is more even. The measuring tank adopts the matching of the cylindrical part and the conical part to occupy partial internal space, and compared with the traditional water tank with the same height and the same inner diameter, the water quantity contained in the measuring tank is less, so that the standard gas required by aeration is less, and the aeration time is also shorter. Meanwhile, each hollow pipe forms isolation, electrodes of the dissolved oxygen measuring instrument to be detected can be placed in each hollow pipe, the electrodes cannot be in contact with each other, and oxygen below the liquid column cannot be consumed in a short time, so that a plurality of dissolved oxygen measuring instruments can be simultaneously detected.
In this embodiment, fixed plate and measuring cell can adopt movable mounting's mode, the fixed plate can be replaced, the through-hole quantity of making in every fixed plate, the internal diameter all can design according to the electrode size of the dissolved oxygen apparatus of examining to examine with supporting hollow tube, adaptability is wide.
The utility model discloses in, install the flow valve in the pipeline between air supply and measuring cell for flow to gas is controlled, then should promote gaseous flow when hollow pipe quantity is many, then should reduce gaseous flow when hollow pipe quantity is few, and it is suitable to be in the saturated condition with the clear water.
The utility model discloses in, adopt constant temperature subassembly to heat the measuring cell, this constant temperature subassembly adopts the constant temperature pond to carry out water bath heating to the measuring cell for the temperature in the promotion measuring cell reaches the optimum temperature, makes it can reach saturated condition with dissolved oxygen. The heating rod and the thermometer are arranged in the constant temperature pool instead of the measuring pool, the clear water used in the measuring pool is small in volume, the temperature is easy to produce when the clear water is heated, and the clear water is not easy to control. And the constant temperature pond then accessible heat-conduction mode realize with the constant temperature of measuring cell, and the cooperation apron uses the heat to scatter and disappear more slowly, and the constant temperature effect is better.
Claims (8)
1. A measurement calibration device for a dissolved oxygen meter, characterized in that: the device comprises a measuring tank, wherein the lower part of the measuring tank is a conical part, the upper part of the measuring tank is a cylindrical part, the conical part and the cylindrical part are integrally manufactured, a partition plate is integrally installed at the connecting position of the conical part and the cylindrical part along the radial direction, a plurality of aeration holes are uniformly formed in the partition plate at intervals, the conical part and the cylindrical part are communicated through the aeration holes, clear water is contained in the conical part and the cylindrical part, an air guide port is manufactured at the end part of the conical part and communicated with an external air source through a pipeline, a fixing plate is installed at the upper end of the cylindrical part along the radial direction, a plurality of through holes are formed in the fixing plate at intervals, a plurality of hollow pipes are integrally installed on the lower end surface of the fixing plate along the inner diameter of each through hole downwards, each hollow pipe extends along the axial direction of the cylindrical part, a gap exists between the lower end part of each hollow pipe and the partition plate, and the gap position and the radially external area of each hollow pipe are arranged into a gas-liquid mixing cavity, the gas-liquid mixing cavity is communicated with the conical part through an aeration hole formed in the partition plate.
2. A metering calibration device for a dissolved oxygen meter according to claim 1, characterized in that: and a flow valve is arranged in a pipeline between the gas source and the measuring pool.
3. A metering calibration device for a dissolved oxygen meter according to claim 1, characterized in that: the measuring cell is placed in a thermostatic assembly for providing a stable heat source to the measuring cell.
4. A metering calibration device for a dissolved oxygen meter according to claim 3, characterized in that: the constant temperature assembly comprises a constant temperature pool, the constant temperature pool is used for containing heating liquid, the bottom of the measuring pool is immersed in the heating liquid, and the condition is that the heating liquid does not flow back to a hollow pipe manufactured by the measuring pool.
5. The metering calibration device for a dissolved oxygen meter according to claim 4, wherein: the constant temperature tank is of an open structure, a cover plate is installed at the open position of the constant temperature tank, through holes are formed in the orthographic projection positions above all hollow pipes made by the cover plate in the measuring tank, and electrodes of dissolved oxygen measuring instruments to be detected are inserted into the through holes.
6. The metering calibration device for a dissolved oxygen meter according to claim 4, wherein: and a liquid outlet is formed at the bottom of the thermostatic pool, and a liquid valve is arranged at the position of the liquid outlet.
7. The metering calibration device for a dissolved oxygen meter according to claim 4, wherein: and a heat source and a temperature detection device are arranged in the constant temperature pool.
8. A metering calibration device for a dissolved oxygen meter according to claim 7, wherein: the heat source adopts the heating rod, and temperature-detecting device adopts the thermometer, the heating end of heating rod, the sense terminal of thermometer all inserts in the constant temperature pond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120317116.3U CN214427416U (en) | 2021-02-04 | 2021-02-04 | Metering calibration device for dissolved oxygen tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120317116.3U CN214427416U (en) | 2021-02-04 | 2021-02-04 | Metering calibration device for dissolved oxygen tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214427416U true CN214427416U (en) | 2021-10-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120317116.3U Active CN214427416U (en) | 2021-02-04 | 2021-02-04 | Metering calibration device for dissolved oxygen tester |
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| Country | Link |
|---|---|
| CN (1) | CN214427416U (en) |
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2021
- 2021-02-04 CN CN202120317116.3U patent/CN214427416U/en active Active
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