CN209858557U - Automatic calibrating device for ammonia nitrogen automatic monitor - Google Patents
Automatic calibrating device for ammonia nitrogen automatic monitor Download PDFInfo
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- CN209858557U CN209858557U CN201920640309.5U CN201920640309U CN209858557U CN 209858557 U CN209858557 U CN 209858557U CN 201920640309 U CN201920640309 U CN 201920640309U CN 209858557 U CN209858557 U CN 209858557U
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- sample injection
- peristaltic pump
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Abstract
The utility model relates to an automatic calibrating device for an ammonia nitrogen automatic monitor, which comprises a liquid bottle A, a liquid bottle B, a liquid bottle C, a four-way valve, a peristaltic pump A, a sample feeding pool, a weighing sensor, a peristaltic pump B, a waste liquid bottle and a control unit; the sample bottle A, the sample bottle B and the sample bottle C are connected with 3 inlets in the four-way valve through pipelines, the rest 1 outlet in the four-way valve is connected with the top of the sample injection pool through a pipeline and a peristaltic pump A, the weighing sensor is arranged at the bottom of the sample injection pool, the bottom of the sample injection pool is connected with the waste liquid bottle through a pipeline and a peristaltic pump B, the ammonia nitrogen automatic monitor to be tested extracts corresponding standard solution in the sample injection pool through a sample injection pipe for verification, and the peristaltic pump A, the peristaltic pump B, the weighing sensor and the four-way valve are controlled by the control unit; the utility model has the advantages of automatic on duty and convenient operation.
Description
Technical Field
The utility model belongs to the technical field of environmental chemometrics, in particular to an automatic calibrating device for an ammonia nitrogen automatic monitor.
Background
Ammonia nitrogen refers to free ammonia (NH) in water3) And ammonium ion (NH)4 +) Nitrogen in the form present. Nitrate Nitrogen (NO) is mainly contained in water3) Mainly free ammonia (NH)3) And ammonium ion (NH)4 +) The ammonia nitrogen in the form of nitrogen polluted water is called hydrated ammonia, also called non-ionic ammonia. Nonionic ammonia is a major factor causing toxicity to aquatic organisms, while ammonium ions are relatively substantially non-toxic. Ammonia nitrogen is a nutrient in water, can cause water eutrophication, is a main oxygen-consuming pollutant in the water and is toxic to fishes and some aquatic organisms. The ammonia nitrogen in the water can be converted into nitrite under certain conditions, and if the water is drunk for a long time, the nitrite in the water is combined with protein to form nitrosamine, which is a strong carcinogen and extremely unfavorable for the human health. Therefore, the ammonia nitrogen index is one of the main factors for monitoring the water environment at present.
The ammonia nitrogen on-line monitor is an instrument which is arranged at a specific position and continuously analyzes ammonia nitrogen of a pollution source for 24 hours, and is widely applied to monitoring and production units such as an environment monitoring station, a sewage treatment plant, a tap water company, related important pollution source production enterprises and the like. In order to ensure the accuracy and reliability of the measurement data of the instruments, the equipment needs to be subjected to quantity value tracing by a local metering technical mechanism every year according to the verification regulation of the JJG 631 ammonia nitrogen automatic monitor.
Indication error, repeatability and stability items in the verification items specified in the verification rules of the JJG 631 ammonia nitrogen automatic monitor; in the illustrated value error, 3 concentration points of 1.0mg/L, 2.0mg/L and a concentration value with an upper limit value of 80% in a measurement range need to be selected for 3 times respectively for 9 times of measurement, and 3 concentration points of 10mg/L, 25mg/L and a concentration value with an upper limit value of 80% in a measurement range need to be selected for 3 times respectively for 9 times of measurement; in the repeatability, a 2.0mg/L, B instrument is selected as a class A instrument, a 25mg/L concentration value is selected for measuring 7 times, and in the stability, a 2.0mg/L, B instrument is selected as a class A instrument, and measurement is carried out once every 0.5 hour within 4 hours for 8 times; the time for completing the verification work of the ammonia nitrogen automatic monitor is about 8 continuous hours.
At present, technicians in a metering department need to manually watch standard samples to replace when calibrating an ammonia nitrogen automatic monitor, so that calibration items such as indicating error, repeatability and stability items are completed. Therefore, if the verification work of the automatic ammonia nitrogen monitor is finished according to the verification regulation of the JJG 631 automatic ammonia nitrogen monitor without an automatic means, the high requirement on the human resource allocation of a metering department is met; in order to solve the problems, an automatic calibrating device for an ammonia nitrogen automatic monitor needs to be developed.
Disclosure of Invention
The utility model aims at providing a low-cost, high degree of automation, easy operation's automatic calibrating installation for ammonia nitrogen automatic monitor in order to solve the manpower resources demand breach that the measurement department carried out ammonia nitrogen automatic monitor examination during operation.
The utility model provides a technical scheme that technical problem took does:
the utility model discloses a three liquid bottle, cross valve, the control unit, two peristaltic pumps, advance kind pond and waste liquid bottle. The three standard solution bottles are connected with three inlets of the four-way valve through polytetrafluoroethylene pipes; the outlet of the four-way valve is connected with the top of the sample feeding pool through a polytetrafluoroethylene tube by a peristaltic pump A; the bottom of the sample injection pool is connected with a waste liquid bottle through a pipeline and a peristaltic pump B; extracting corresponding standard solution in the sample injection pool through the sample injection pipe by the automatic ammonia nitrogen monitor to be detected for detection; the weighing sensor is arranged at the bottom of the sample injection pool and measures the weight of the sample injection pool, and the control unit receives an output electric signal of the weighing sensor and controls the rotation and stop actions of the peristaltic pump A and the peristaltic pump B and the conduction and closing states of all valve paths of the four-way valve.
Furthermore, the liquid sign bottle A, the liquid sign bottle B and the liquid sign bottle C are all polypropylene storage bottles, the capacity is 1L, a cover with the diameter of 45mm is arranged, and a mouth with the diameter of 5mm is formed in the middle of the cover.
Furthermore, the maximum flow rate of the peristaltic pump A and the peristaltic pump B is 960 mL/min.
Furthermore, the sample injection pool is made of smooth ceramic materials, the capacity of the sample injection pool is 150 milliliters, the top of the sample injection pool is closed by stainless steel materials and is provided with two openings with the diameter of 3mm, and the middle position of the bottom of the sample injection pool is provided with a water outlet with the diameter of 5 mm.
Furthermore, the measuring range of the weighing sensor is 3000g, and the resolution is 0.1 g.
The utility model has the advantages that: the utility model adopts an automatic calibrating device for an ammonia nitrogen automatic monitor, which consists of a liquid sign bottle A, a liquid sign bottle B, a liquid sign bottle C, a four-way valve, a peristaltic pump A, a sample injection pool, a weighing sensor, a peristaltic pump B, a waste liquid bottle and a control unit; the device is characterized in that the control unit controls the four-way valve and the peristaltic pump A to guide corresponding standard solution into the sample injection pool at an accurate time, the standard solution in the sample injection pool is extracted by the detected instrument to be detected to carry out verification work, the control unit controls the peristaltic pump B to empty the waste standard solution in the sample injection pool, the weighing sensor measures the weight of the guided standard solution in real time and outputs an electric signal to the control unit to further control the standard solution capacity of the sample injection pool, and the device has the advantages of low cost, high automation degree and simplicity in operation.
Drawings
FIG. 1 is a structural diagram of the automatic calibrating apparatus for the automatic ammonia nitrogen monitor.
In the figure: 1. a standard solution bottle A; 2. A standard solution bottle B; 3. A standard solution bottle C; 4. a four-way valve; 5. A peristaltic pump A; 6. A sample introduction pool; 7. A weighing sensor; 8. A peristaltic pump B; 9. a waste liquid bottle; 10. A control unit; 11. and (5) detecting the instrument.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1, in this embodiment, a standard solution with a low concentration value, a standard solution with a medium concentration value, and a standard solution with a high concentration value are respectively stored in a standard solution bottle A1, a standard solution with a medium concentration value, and a standard solution with a high concentration value in a standard solution bottle C3, a control unit 10 presets a weight value corresponding to a set volume of a sample injection cell by a calibration method, controls a four-way valve 4 to open a passage of an inlet a and an outlet and close a passage of an inlet B, C and an outlet, and introduces the standard solution with the low concentration value into the sample injection cell 6 by a peristaltic pump A5, when a weight sensor 7 measures that the standard solution with the low concentration value introduced into the sample injection cell reaches a set weight in real time, the control unit controls the peristaltic pump a to stop operating, and. After the low concentration value indication error item is detected, the control unit controls the peristaltic pump B8 to empty the sample injection pool to a waste liquid bottle 9; the control unit controls the four-way valve to conduct a passage of the inlet B and the outlet and close a passage of the inlet A, C and the outlet, a medium concentration value standard solution is introduced into the sample introduction pool through the peristaltic pump A, when the weighing sensor measures that the medium concentration value standard solution introduced into the sample introduction pool reaches a set weight, the control unit controls the peristaltic pump A to stop acting and the peristaltic pump B to start acting, the standard solution in the sample introduction pool is emptied, the cleaning step of the sample introduction pool is carried out, after the cleaning steps are repeated for two times, the medium concentration value standard solution with a set volume is introduced into the sample introduction pool, and the detected instrument extracts the medium concentration value standard solution in the sample introduction pool to carry out detection on indication error items, repeatability and stability items of the medium concentration value; after finishing each verification item of the medium concentration value, the automatic verification device conducts a passage of an inlet C and an outlet of the four-way valve and closes a passage of an inlet A, B and an outlet, a high-concentration value standard solution is introduced into the sample injection pool through the peristaltic pump A, when the weighing sensor measures that the high-concentration value standard solution introduced into the sample injection pool reaches a set weight, the control unit controls the peristaltic pump A to stop acting and the peristaltic pump B to start acting, the standard solution in the sample injection pool is emptied, the sample injection pool is cleaned, after the cleaning steps are repeated for two times, the high-concentration value standard solution with a set volume is introduced into the sample injection pool, and the high-concentration value standard solution in the sample injection pool is extracted by the detected instrument to perform the verification of the indicating; after all the verification items are finished, the control unit controls the peristaltic pump B to start to act to empty the high-concentration-value standard solution in the sample injection pool, and the whole automatic verification process is finished.
The embodiment is that the device is used for detecting an A-class ammonia nitrogen automatic monitor with the full range of 10 mg/L; the standard solution of 1.0mg/L, 2.0mg/L and 8.0mg/L are respectively stored in a standard solution bottle A, a standard solution bottle B and a standard solution bottle C, a control unit presets a sample injection pool in a calibration mode to set a corresponding weight value of 100mL, the control unit controls a four-way valve to conduct a passage of an inlet A and an outlet and close a passage of an inlet B, C and an outlet, the 1.0mg/L standard solution is introduced into the sample injection pool through a peristaltic pump A, when a weighing sensor measures that the 1.0mg/L standard solution introduced into the sample injection pool reaches the set weight in real time, the control unit controls the peristaltic pump A to stop acting, and a detected instrument extracts the 1.0mg/L standard solution in the sample injection pool to carry out indication error item detection; after the 1.0mg/L concentration value indication error item is detected, the control unit controls the peristaltic pump B to empty the sample injection pool; the control unit controls the four-way valve to conduct a passage of the inlet B and the outlet and close a passage of the inlet A, C and the outlet, 2.0mg/L standard solution is introduced into the sample introduction pool through the peristaltic pump A, when the weighing sensor measures that the 2.0mg/L standard solution introduced into the sample introduction pool reaches a set weight, the control unit controls the peristaltic pump A to stop acting and the peristaltic pump B to start acting, the standard solution in the sample introduction pool is emptied, the cleaning step of the sample introduction pool is carried out, after the cleaning steps are repeated for two times, the 2.0mg/L standard solution with a set volume is introduced into the sample introduction pool, and the 2.0mg/L standard solution in the sample introduction pool is extracted by the detected instrument to carry out verification on indicating error items, repeatability and stability items of 2.0 mg/L; after finishing each verification item of 2.0mg/L concentration value, the automatic verification device conducts a passage of an inlet C and an outlet of a four-way valve and closes a passage of an inlet A, B and the outlet, 8.0mg/L standard solution is introduced into the sample introduction pool through a peristaltic pump A, when a weighing sensor measures that the 8.0mg/L standard solution introduced into the sample introduction pool reaches a set weight, a control unit controls the peristaltic pump A to stop acting and the peristaltic pump B to start acting, the standard solution in the sample introduction pool is emptied, the cleaning step of the sample introduction pool is carried out, after the cleaning step is repeated for two times, 8.0mg/L standard solution with a set volume is introduced into the sample introduction pool, and the 8.0mg/L standard solution in the sample introduction pool of the detected instrument is extracted to carry out the verification item of indicating value error of the 8.0 mg/L; after all the verification items are finished, the control unit controls the peristaltic pump B to start to act to empty the 8.0mg/L concentration value standard solution in the sample injection pool, and the whole automatic verification process is finished.
Claims (5)
1. The utility model provides an ammonia nitrogen automatic monitor is with automatic calibrating installation, includes three liquid bottle, cross valve, the control unit, two peristaltic pumps, advances kind pond and waste liquid bottle, its characterized in that:
the three standard solution bottles are connected with three inlets of the four-way valve through polytetrafluoroethylene pipes; the outlet of the four-way valve is connected with the top of the sample feeding pool through a polytetrafluoroethylene tube by a peristaltic pump A; the bottom of the sample injection pool is connected with a waste liquid bottle through a pipeline and a peristaltic pump B; extracting corresponding standard solution in the sample injection pool through the sample injection pipe by the automatic ammonia nitrogen monitor to be detected for detection; the weighing sensor is arranged at the bottom of the sample injection pool and measures the weight of the sample injection pool, and the control unit receives an output electric signal of the weighing sensor and controls the rotation and stop actions of the peristaltic pump A and the peristaltic pump B and the conduction and closing states of all valve paths of the four-way valve.
2. The automatic calibrating installation for ammonia nitrogen automatic monitor according to claim 1, characterized in that: the standard solution bottle A, the standard solution bottle B and the standard solution bottle C are all polypropylene storage bottles, the capacity is 1L, a cover with the diameter of 45mm is arranged, and a mouth with the diameter of 5mm is formed in the middle of the cover.
3. The automatic calibrating installation for ammonia nitrogen automatic monitor according to claim 1, characterized in that: the maximum flow rate of the peristaltic pump A and the peristaltic pump B is 960 mL/min.
4. The automatic calibrating installation for ammonia nitrogen automatic monitor according to claim 1, characterized in that: the sample injection pool is made of smooth ceramic materials, the capacity of the sample injection pool is 150 milliliters, the top of the sample injection pool is closed by stainless steel materials and is provided with two openings with the diameter of 3mm, and the middle position of the bottom of the sample injection pool is provided with a water outlet with the diameter of 5 mm.
5. The automatic calibrating installation for ammonia nitrogen automatic monitor according to claim 1, characterized in that: the measuring range of the weighing sensor is 3000g, and the resolution is 0.1 g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920640309.5U CN209858557U (en) | 2019-05-07 | 2019-05-07 | Automatic calibrating device for ammonia nitrogen automatic monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920640309.5U CN209858557U (en) | 2019-05-07 | 2019-05-07 | Automatic calibrating device for ammonia nitrogen automatic monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209858557U true CN209858557U (en) | 2019-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920640309.5U Active CN209858557U (en) | 2019-05-07 | 2019-05-07 | Automatic calibrating device for ammonia nitrogen automatic monitor |
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| CN (1) | CN209858557U (en) |
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2019
- 2019-05-07 CN CN201920640309.5U patent/CN209858557U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220330 Address after: No.300 Xiasha Road, Hangzhou, Zhejiang 310018 Patentee after: ZHEJIANG MEASUREMENT SCIENCE Research Institute Address before: 310013 building 4, No. 56, Liuhe Road, Hangzhou, Zhejiang Patentee before: ZHEJIANG FANGZHENG CALIBRATION Co.,Ltd. Patentee before: Zhejiang Institute of Metrology |
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| TR01 | Transfer of patent right |