CN209764845U - Circulating dynamic verification system of dissolved oxygen meter - Google Patents
Circulating dynamic verification system of dissolved oxygen meter Download PDFInfo
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- CN209764845U CN209764845U CN201821652167.6U CN201821652167U CN209764845U CN 209764845 U CN209764845 U CN 209764845U CN 201821652167 U CN201821652167 U CN 201821652167U CN 209764845 U CN209764845 U CN 209764845U
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Abstract
The utility model discloses a circulating dynamic verification system of dissolved oxygen meter, a serial communication port, the verification system includes: a hypoxic water circuit for providing hypoxic water; a saturated oxygen water circuit for providing saturated oxygen water; a mixer for mixing the reduced oxygen water and the saturated oxygen water; the calibration loop is used for calibrating the dissolved oxygen amount of the mixed water sample; a circulation loop for transporting the mixed water sample in the verification loop into the saturated oxygen water loop and the low oxygen water loop. The utility model discloses carry out recycle to the water sample after the check-up, need not in the long-term examination experiment adding the water sample, realize the water sample recycling of check-up to establish the basis for the long period steady operation of dissolved oxygen table.
Description
Technical Field
The utility model relates to a quality of water instrument check-up field, concretely relates to circulating dynamic verification system of dissolved oxygen meter.
Background
Dissolving in waterThe presence of oxygen increases corrosion of the structural material, reducing its strength. Especially when Cl is present－when present, the presence of dissolved oxygen may cause stress corrosion cracking of the Fe-Cr-Ni alloy. In order to ensure the safety and reliability of devices and equipment, a plurality of power plant boilers, ship power devices and the like adopt a method for removing dissolved oxygen in water to reduce the corrosion of structural materials, and particularly avoid the stress corrosion cracking of the structural materials. The dissolved oxygen meter is used for monitoring the content of dissolved oxygen in water and is important equipment for ensuring stable operation of power plant boilers, ship power devices and the like.
the dissolved oxygen meter needs to be checked frequently to ensure the measurement accuracy due to the characteristics of the dissolved oxygen meter, and particularly, a newly purchased or repaired dissolved oxygen meter needs to be subjected to a long-period examination test on a laboratory bench, so that the measurement accuracy and the equipment reliability are ensured. However, the following problems exist in the long-term assessment test: the used standard dissolved oxygen water sample is generally directly discharged after passing through a standard meter and a meter to be measured due to the change of the dissolved oxygen content, so a large amount of water samples are needed, and waste is caused.
SUMMERY OF THE UTILITY MODEL
To the defect that exists among the prior art, the utility model aims to provide a circulating dynamic verification system of dissolved oxygen table, the utility model discloses carry out recycle to the water sample after the water sample check, need not in the long-term examination experiment and adding the water sample, realize the water sample recycling of check to establish the basis for the long period steady operation of dissolved oxygen table.
In order to achieve the above purpose, the utility model adopts the technical proposal that:
A circulating dynamic calibration system for a dissolved oxygen meter, the calibration system comprising:
A hypoxic water circuit for providing hypoxic water;
a saturated oxygen water circuit for providing saturated oxygen water;
a mixer for mixing the reduced oxygen water and the saturated oxygen water;
The calibration loop is used for calibrating the dissolved oxygen amount of the mixed water sample;
A circulation loop for transporting the mixed water sample in the verification loop into the saturated oxygen water loop and the low oxygen water loop;
Wherein the check loop comprises:
A standard branch, on which a standard dissolved oxygen meter is arranged;
each branch to be detected is connected in parallel with two ends of the standard branch; each branch to be detected is provided with a point to be detected for installing a dissolved oxygen meter to be detected;
and the return branch is connected in parallel with two ends of the standard branch.
on the basis of the technical scheme, the low-oxygen water loop comprises:
a hypoxic water tank for storing a mixed water sample from the circulation loop;
A hypoxic water branch, both ends of which are respectively connected with the hypoxic water tank and the mixer; and the low-oxygen water branch is sequentially provided with a first water pump, a first regulating valve and a first flowmeter in series.
On the basis of the technical scheme, the saturated oxygen water loop comprises:
A saturated oxygen water tank for storing the mixed water sample from the circulation loop;
The two ends of the saturated oxygen water branch are respectively connected with the saturated oxygen water tank and the mixer; and a second water pump, a second regulating valve and a second flowmeter are sequentially arranged on the low-oxygen water branch in series.
on the basis of the technical scheme, the low-oxygen water branch further comprises a first oxygen removal device arranged on the first regulating valve and the first flowmeter.
on the basis of the above technical scheme, the first oxygen removal device includes:
the first oxygen removing branch comprises a first oxygen removing piece and first valve switches connected to two ends of the first oxygen removing piece;
a first switching branch comprising a second valve switch, the first switching branch in parallel with the first oxygen scavenging branch.
on the basis of the technical scheme, the low-oxygen water tank and the saturated oxygen water tank are both provided with heat tracing bands, and the heat tracing bands are used for keeping the water temperature constant;
Thermometers are arranged in the hypoxia water tank and the saturated oxygen water tank;
and liquid level meters are arranged in the hypoxia water tank and the saturated oxygen water tank.
on the basis of the above technical solution, the circulation loop includes:
a first circulation branch, one end of which is connected with the standard branch; a check valve is arranged on the first circulation branch;
one end of the second circulating branch is connected to the other end of the first circulating branch, and the other end of the second circulating branch is connected to the saturated oxygen water tank;
one end of the third circulating branch is connected to the other end of the first circulating branch, and the other end of the third circulating branch is connected to the low-oxygen water tank; and a second deoxidizing device is arranged on the third circulating branch.
on the basis of the technical scheme, a fifth regulating valve is arranged on the second circulation branch.
On the basis of the above technical scheme, the second oxygen removal device includes:
the second oxygen removing branch comprises a second oxygen removing piece and a third valve switch connected to two ends of the second oxygen removing piece;
A second switching leg comprising a fourth valve switch, the second switching leg in parallel with the second oxygen scavenging leg.
On the basis of the technical scheme, a third regulating valve, a third flowmeter and a pressure gauge are sequentially arranged on the standard branch and the branch to be detected in series;
A fourth regulating valve is arranged on the backflow branch;
Wherein, standard oxygen table, be used for installing wait to examine oxygen table wait to examine the point of examining locate respectively in series standard branch road wait to examine on the branch road the third flowmeter with between the manometer.
compared with the prior art, the utility model has the advantages of:
the utility model provides a circulating calibration system of dissolved oxygen meter, the water sample after the water sample calibration is recycled, need not in the long-term examination experiment to add the water sample, realizes the water sample recycling of calibration, thereby has established the basis for the long period stable operation of dissolved oxygen meter, has reduced the direct emission of water sample and has caused the waste; mixing the low-oxygen water and the saturated oxygen water by the mixer to obtain a mixed water sample; the low-oxygen water tank and the saturated oxygen water tank are respectively provided with a heat tracing band which is respectively used for controlling the temperature of low-oxygen water and saturated oxygen water to reach the constant temperature of the low-oxygen water tank and the saturated oxygen water tank; the first regulating valve and the second regulating valve are respectively used for controlling the flow of the low-oxygen water and the flow of the saturated oxygen water before mixing so as to gradually obtain a required mixed water sample; the pressure gauge has the function of automatically cutting off the flow when the pressure exceeds the standard; the utility model provides high reliability, the security of dissolved oxygen meter check-up system.
Drawings
FIG. 1 is a schematic view of a circular dynamic calibration system for a dissolved oxygen meter according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a calibration loop according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a first oxygen removal device in an embodiment of the present invention;
FIG. 4 is a schematic view of a second oxygen removal device in an embodiment of the present invention;
In the figure: 11-hypoxic water tank, 12-hypoxic water branch, 121-first water pump, 122-first regulating valve, 123-first deoxygenating device, 1231-first deoxygenating element, 1232-first valve switch, 1233-second valve switch, 124-first flow meter, 21-saturated oxygen water tank, 221-second water pump, 222-second regulating valve, 223-second flow meter, 3-mixer, 41-standard branch, 411-standard dissolved oxygen meter, 42-branch to be tested, 421-dissolved oxygen meter to be tested, 43-reflux branch, 44-third regulating valve, 45-third flow meter, 46-pressure meter, 47-fourth regulating valve, 51-first circulation branch, 511-check valve, 52-second circulation branch, 521-fifth regulating valve, 53-third circulation branch, 531-second oxygen removal device, 5311-second oxygen removal element, 5312-third valve switch, 5313-fourth valve switch, 6-heat tracing band, 7-thermometer and 8-liquid level meter.
Detailed Description
the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection 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", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
in the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. It is to be noted that all the figures are exemplary representations. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present invention will be described in further detail below with reference to specific embodiments and with reference to the accompanying drawings.
Examples
referring to fig. 1-4, an embodiment of the present invention provides a circulating dynamic calibration system of dissolved oxygen meter, the calibration system includes a low oxygen water loop for providing low oxygen water, a saturated oxygen water loop for providing saturated oxygen water, a mixer 3 for mixing the low oxygen water and the saturated oxygen water, a calibration loop for calibrating the dissolved oxygen amount of a mixed water sample, and a circulation loop for conveying the mixed water sample in the calibration loop to the saturated oxygen water loop and the low oxygen water loop.
the embodiment of the utility model provides a circulating dynamic verification system of dissolved oxygen table carries out recycle to the check-up water sample, need not in the long-term examination experiment at the interpolation water sample, realizes the water sample recycling of check-up to establish the basis for the long period steady operation of dissolved oxygen table, reduced the direct emission of water sample and caused the waste.
Further, the hypoxic water loop comprises a hypoxic water tank 11 and a hypoxic water branch 12, two ends of the hypoxic water branch 12 are respectively connected to a water outlet of the hypoxic water tank 11 and a water inlet of the mixer 3, a first water pump 121, a first regulating valve 122 and a first flow meter 124 are sequentially connected to the hypoxic water branch 12 in series, the hypoxic water tank 11 is used for storing hypoxic water for mixing, the first water pump 121 is used for providing power for the hypoxic water to enter the mixer 3, the opening degree of the first regulating valve 122 is used for regulating the flow of the hypoxic water on the hypoxic water branch 12, and the first flow meter 124 is used for detecting the value of the flow rate of the hypoxic water; further, the hypoxic water branch 12 further comprises a first oxygen removal device 123 disposed on the first regulating valve 122 and the first flow meter 124, and the first oxygen removal device 123 is configured to further remove oxygen from hypoxic water in the hypoxic water tank. As shown in fig. 3, the first oxygen removing device 123 includes a first oxygen removing branch and a first switching branch connected in parallel with the first oxygen removing branch; the first oxygen removing branch comprises a first oxygen removing piece 1231 and a first valve switch 1232 connected to two ends of the first oxygen removing piece 1231; the first switching branch comprises a second valve switch 1233; the first valve switch 1232 and the second valve switch 1233 are respectively used for switching the first oxygen removing branch and the first switching branch.
Further, the saturated oxygen water loop comprises a saturated oxygen water tank 21 and a saturated oxygen water branch, two ends of the saturated oxygen water branch are respectively connected to a water outlet of the saturated oxygen water tank 21 and a water inlet of the mixer 3, and the low oxygen water branch 12 is sequentially provided with a second water pump 221, a second regulating valve 222 and a second flow meter 223 in series; wherein, the saturated oxygen water tank 21 is used for storing the saturated oxygen water that is used for mixing, the second water pump 221 is used for getting into blender 3 for the saturated oxygen water and provides power, the aperture of the second governing valve 222 is used for adjusting the flow of saturated oxygen water on the saturated oxygen water branch road to adopt the numerical value of second flowmeter 223 detection saturated oxygen water flow.
The first regulating valve 122 and the second regulating valve 222 are respectively used for controlling the flow of the low-oxygen water and the saturated oxygen water before mixing so as to gradually obtain the required mixed water sample.
the checking loop comprises a standard branch 41, two branches to be checked 42 and a return branch; a standard dissolved oxygen meter 411 is arranged on the standard branch 41, and the standard dissolved oxygen meter 411 is used for detecting the standard dissolved oxygen; the two branches to be detected 42 are connected in parallel to two ends of the standard branch 41, and each branch to be detected 42 is provided with a point to be detected for installing the dissolved oxygen meter to be detected 421; the return branch is connected in parallel to both ends of the standard branch 41.
specifically, a third regulating valve 44, a third flow meter 45 and a pressure gauge 46 are sequentially arranged on the standard branch 41 and the branch 42 to be detected in series, and a fourth regulating valve 47 is arranged on the return branch; wherein, standard oxygen table, the point of awaiting measuring that is used for installing the oxygen table of awaiting measuring are located in series respectively standard branch circuit 41 on the branch circuit 42 of awaiting measuring third flowmeter 45 with between the manometer 46. The pressure gauge 46 has an automatic cutoff function when the pressure exceeds the standard, and the safety of the checking system is improved.
as a modification of the present embodiment, the low oxygen water tank 11 and the saturated oxygen water tank 21 are both provided with a heat tracing band 6, and the heat tracing band 6 is used for keeping the water temperature constant; thermometers 7 are arranged in the hypoxic water tank 11 and the saturated oxygen water tank 21, the temperature in the hypoxic water tank 11 and the saturated oxygen water tank 21 is monitored in real time, and the temperature is matched with the heat tracing band 6 for use, so that accurate temperature control is realized, and errors of a dissolved oxygen meter caused by temperature compensation are reduced; the low oxygen water tank 11 with still all be equipped with level gauge 8 in the saturated oxygen water tank 21, be used for detecting low oxygen water tank 11 with the water level of saturated oxygen water tank 21 realizes low oxygen water tank 11 with the control of saturated oxygen water tank 21 water level improves the fail safe nature of check-up system.
The heat tracing band 6 can be replaced by any refrigerating device on the market, and the preset temperature control can be achieved.
further, the circulation loop comprises a first circulation branch 51, a second circulation branch 52 and a third circulation branch 53; one end of the first circulation branch 51 is connected to the standard branch 41, i.e. the check loop, and the other end is connected to the second circulation branch 52 and the third circulation branch 53 respectively; the first circulation branch 51 is provided with a check valve 511 for preventing the circulating water on the first circulation branch 51 from flowing back to the check circuit; the other ends of the second circulation branch 52 and the third circulation branch 53 are respectively connected to the saturated oxygen water tank 21 and the low oxygen water tank 11, after the saturated oxygen water tank 21 and the low oxygen water tank 11 are initially filled with water, the water sample can be recycled, waste caused by direct discharge of the water sample is reduced, and therefore a foundation is laid for long-period stable operation of a dissolved oxygen meter; the third circulation branch 53 is connected to the low oxygen water loop, so that the third circulation branch 53 is provided with a second oxygen removal device 531 for removing oxygen in the circulation water and introducing a water sample with lower dissolved oxygen into the low oxygen water tank 11; the fifth regulating valve 521 is arranged on the second circulating branch 52, so that the flow of circulating water introduced into the saturated oxygen water tank 21 can be conveniently regulated, the water level in the saturated oxygen water tank is prevented from exceeding the standard, and the safety and reliability are improved. As shown in fig. 4, the second oxygen removal device 531 comprises a second oxygen removal branch and a second switching branch in parallel with the second oxygen removal branch; the second oxygen removing branch comprises a second oxygen removing piece 5311 and a third valve switch 5312 connected to two ends of the second oxygen removing piece 5311; the second switching leg includes a fourth valve switch 5313; the third valve switch 5312 and the fourth valve switch 5313 are respectively used for switching the second oxygen removing branch and the second switching branch.
as a further improvement and supplement to this embodiment, the calibration system further includes an operation display control unit, which automatically controls the opening degrees of the first regulating valve 122 and the second regulating valve 222 according to a preset dissolved oxygen amount and an actual detected dissolved oxygen amount, performs temperature control according to a preset temperature, and further adjusts the dissolved oxygen amount on the calibration loop, and realizes the adjustment of the dissolved oxygen amount of the whole calibration system through the first regulating valve 122, the second regulating valve 222 and the mixer 3, so as to generate a standard water sample with dissolved oxygen of any concentration within the range of 1 μ g/L to 20000 μ g/L, thereby improving the automation degree of the calibration system.
The utility model discloses a check-up step is as follows:
After the low-oxygen water tank 11 and the saturated oxygen water tank 21 are filled with water for the first time, gas and oxygen which are difficult to dissolve in water are respectively introduced into the low-oxygen water tank 11 and the saturated oxygen water tank 21 until the dissolved oxygen amount is correspondingly lower than 10 mug/L and 80000 mug/L-90000 mug/L, and the heat tracing band 6 is controlled to reach the preset temperature of the water temperature in the low-oxygen water tank 11 and the saturated oxygen water tank 21;
the hypoxic water in the hypoxic water tank 11 enters the mixer 3 through the first oxygen removal device 123 in the hypoxic water branch 12;
The saturated oxygen water in the saturated oxygen water tank 21 enters the mixer 3 through a saturated oxygen water branch;
After the low-oxygen water and the saturated oxygen water are fully mixed in the mixer 3, the low-oxygen water and the saturated oxygen water flow into a calibration loop, and the dissolved oxygen of the mixed water sample is measured through a standard oxygen meter and an oxygen meter to be detected;
The checked mixed water sample flows into the circulation loop, flows through the first circulation branch 51 and then is divided into the second circulation branch 52 and the third circulation branch 53, the mixed water sample in the second circulation branch 52 enters the saturated oxygen water tank 21, and the mixed water sample in the third circulation branch 53 enters the low oxygen water tank 11 after passing through the second oxygen removal device 531;
The low oxygen water in the low oxygen water tank 11 and the saturated oxygen water in the saturated oxygen water tank 21 enter the mixer 3 again according to the method, and enter the next process for performing multiple cyclic dynamic checks.
In the above steps, the operation display control unit controls the first and second regulating valves 122 and 222 in the calibration system according to the preset dissolved oxygen amount to regulate the actual dissolved oxygen amount.
the present invention is not limited to the above embodiments, and for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered to be within the protection scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (10)
1. a circulating dynamic verification system for a dissolved oxygen meter, the verification system comprising:
a hypoxic water circuit for providing hypoxic water;
a saturated oxygen water circuit for providing saturated oxygen water;
a mixer for mixing the reduced oxygen water and the saturated oxygen water;
The calibration loop is used for calibrating the dissolved oxygen amount of the mixed water sample;
A circulation loop for transporting the mixed water sample in the verification loop into the saturated oxygen water loop and the low oxygen water loop;
Wherein the check loop comprises:
a standard branch, on which a standard dissolved oxygen meter is arranged;
Each branch to be detected is connected in parallel with two ends of the standard branch; each branch to be detected is provided with a point to be detected for installing a dissolved oxygen meter to be detected;
And the return branch is connected in parallel with two ends of the standard branch.
2. The system of claim 1, wherein the low oxygen water loop comprises:
a hypoxic water tank for storing hypoxic water for mixing;
a hypoxic water branch, both ends of which are respectively connected with the hypoxic water tank and the mixer; and the low-oxygen water branch is sequentially provided with a first water pump, a first regulating valve and a first flowmeter in series.
3. the system of claim 2, wherein the saturated oxygen water loop comprises:
A saturated oxygen water tank for storing saturated oxygen water for mixing;
The two ends of the saturated oxygen water branch are respectively connected with the saturated oxygen water tank and the mixer; and a second water pump, a second regulating valve and a second flowmeter are sequentially arranged on the low-oxygen water branch in series.
4. the system of claim 2, wherein the low-oxygen water branch further comprises a first oxygen removal device disposed in the first regulating valve and the first flow meter.
5. The circulating dynamic verification system for the dissolved oxygen meter according to claim 4, wherein the first oxygen removing device comprises:
The first oxygen removing branch comprises a first oxygen removing piece and first valve switches connected to two ends of the first oxygen removing piece;
A first switching branch comprising a second valve switch, the first switching branch in parallel with the first oxygen scavenging branch.
6. the circulating dynamic verification system for the dissolved oxygen meter according to claim 3, wherein a heat tracing band is arranged on each of the low-oxygen water tank and the saturated oxygen water tank, and is used for keeping the water temperature constant;
Thermometers are arranged in the hypoxia water tank and the saturated oxygen water tank;
and liquid level meters are arranged in the hypoxia water tank and the saturated oxygen water tank.
7. the system of claim 3, wherein the circulation loop comprises:
A first circulation branch, one end of which is connected with the standard branch; a check valve is arranged on the first circulation branch;
One end of the second circulating branch is connected to the other end of the first circulating branch, and the other end of the second circulating branch is connected to the saturated oxygen water tank;
One end of the third circulating branch is connected to the other end of the first circulating branch, and the other end of the third circulating branch is connected to the low-oxygen water tank; and a second deoxidizing device is arranged on the third circulating branch.
8. The system of claim 7, wherein a fifth control valve is disposed in the second branch.
9. the circulating dynamic verification system for the dissolved oxygen meter according to claim 7, wherein the second oxygen removing device comprises:
the second oxygen removing branch comprises a second oxygen removing piece and a third valve switch connected to two ends of the second oxygen removing piece;
a second switching leg comprising a fourth valve switch, the second switching leg in parallel with the second oxygen scavenging leg.
10. the circulating dynamic verification system for the dissolved oxygen meter according to claim 1, wherein a third regulating valve, a third flow meter and a pressure meter are sequentially arranged on the standard branch and the branch to be detected in series;
a fourth regulating valve is arranged on the backflow branch;
Wherein, standard oxygen table, be used for installing wait to examine oxygen table wait to examine the point of examining locate respectively in series standard branch road wait to examine on the branch road the third flowmeter with between the manometer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821652167.6U CN209764845U (en) | 2018-10-11 | 2018-10-11 | Circulating dynamic verification system of dissolved oxygen meter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821652167.6U CN209764845U (en) | 2018-10-11 | 2018-10-11 | Circulating dynamic verification system of dissolved oxygen meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342678A (en) * | 2018-10-11 | 2019-02-15 | 中国船舶重工集团公司第七〇九研究所 | A kind of circulating dynamic check system of dissolved oxygen table |
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2018
- 2018-10-11 CN CN201821652167.6U patent/CN209764845U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342678A (en) * | 2018-10-11 | 2019-02-15 | 中国船舶重工集团公司第七〇九研究所 | A kind of circulating dynamic check system of dissolved oxygen table |
| CN109342678B (en) * | 2018-10-11 | 2024-01-30 | 中国船舶重工集团公司第七一九研究所 | Dissolved oxygen meter circulating type dynamic verification system |
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