CN209821181U - Dissolved oxygen sensor test device - Google Patents
Dissolved oxygen sensor test device Download PDFInfo
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- CN209821181U CN209821181U CN201920409782.2U CN201920409782U CN209821181U CN 209821181 U CN209821181 U CN 209821181U CN 201920409782 U CN201920409782 U CN 201920409782U CN 209821181 U CN209821181 U CN 209821181U
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- dissolved oxygen
- regulating valve
- pipeline interface
- oxygen sensor
- negative pressure
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Abstract
The utility model belongs to the technical field of nuclear power station soda water system dissolved oxygen, concretely relates to dissolved oxygen sensor test device includes: the system comprises an instrument flow cell, a flow regulating valve, a flowmeter, a dial type positive and negative pressure gauge, a back pressure regulating valve and a sampling pipeline interface; one end of the sampling pipeline interface is connected with a loop sampling system through a hose, and the other end of the sampling pipeline interface is sequentially connected with a flow regulating valve, a flow meter and a dial type positive and negative pressure gauge from bottom to top through a stainless steel pipe; an instrument flow cell is connected between the flowmeter and the dial positive and negative pressure gauges; one end of the instrument flow cell is also connected with a back pressure regulating valve. The utility model discloses the device can simulate dissolved oxygen sensor's various measuring condition to confirm the best operating condition of sensor, when the sensor breaks down, can the working property of snap judgments sensor simultaneously, confirm trouble root cause, effectively shorten defect handling time.
Description
Technical Field
The utility model belongs to the technical field of nuclear power station soda water system dissolved oxygen, concretely relates to dissolved oxygen sensor test device.
Background
To prevent corrosion, scaling and salt accumulation in power plant thermal equipment, the dissolved oxygen content of the power plant steam system must be accurately monitored. However, the measurement of the dissolved oxygen content in water is carried out by converting the dissolved oxygen concentration into an electrical signal through an electrochemical sensor, and the measurement accuracy of the online dissolved oxygen sensor is low due to the fact that the process is easily influenced by a plurality of factors such as measurement conditions, instrument verification, sample temperature, electrode aging and the like. Therefore, the accurate measurement of the dissolved oxygen content in the water vapor system has important significance for the safe and stable operation of the power station.
In the prior art, a plurality of analysis instruments are connected in parallel in the same loop, part of the instruments are sampled at variable time, and meanwhile, the system has a manual sampling function, so that the pressure and flow of the system are changed greatly when chemical manual sampling analysis is performed. In addition, because the measured medium is a loop radioactive coolant, the measured medium needs to be recovered to a specific container, and the inside of the container is in a negative pressure state, so that the instrument is influenced by the negative pressure of a downstream system. The addition of a throttling device at the outlet of the flow cell can reduce the negative pressure effect, but at the same time increase the pressure to which the sensor is subjected, which also has an effect on the measurement value of the meter.
The defect amount of a nuclear power unit primary circuit dissolved oxygen meter is high in the using process, the root cause of a fault cannot be determined in a short time due to the fact that a special test device is not arranged, the fault can only be calibrated through maintenance and continuously checked, the instrument is in an unavailable state for a long time in the whole defect eliminating process, cost is consumed, and a large amount of time is wasted.
Therefore, it is highly desirable to design a testing device for such situations, which can simulate the measurement conditions of the dissolved oxygen sensor and visually display the conditions to determine the optimal working conditions of the sensor, and at the same time, when the sensor fails, can quickly determine the working state of the sensor to determine the root cause of the failure.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the purpose provides a dissolved oxygen sensor test device to the not enough of above-mentioned prior art for solve the best operating condition that can't judge dissolved oxygen sensor among the prior art, unable quick location trouble root cause's technical problem.
The technical scheme of the utility model is that:
a dissolved oxygen sensor testing apparatus comprising: the system comprises an instrument flow cell, a flow regulating valve, a flowmeter, a dial type positive and negative pressure gauge, a back pressure regulating valve and a sampling pipeline interface; one end of the sampling pipeline interface is connected with a loop sampling system through a hose, and the other end of the sampling pipeline interface is sequentially connected with a flow regulating valve, a flow meter and a dial type positive and negative pressure gauge from bottom to top through a stainless steel pipe; an instrument flow cell is connected between the flowmeter and the dial positive and negative pressure gauges; one end of the instrument flow cell is also connected with a back pressure regulating valve.
As mentioned above, the external part of the sampling pipeline interface is a pagoda mouth quick-mounting joint, and the connection mode of the sampling pipeline interface and a loop sampling system also comprises a cutting sleeve connection.
The utility model discloses following beneficial effect has:
the utility model discloses the device can simulate dissolved oxygen sensor's various measuring condition to confirm the best operating condition of sensor, when the sensor breaks down, can the working property of snap judgments sensor simultaneously, confirm trouble root cause, effectively shorten defect handling time.
The utility model discloses the device has solved the not enough of dissolved oxygen measuring device in negative pressure environment measuring property, can provide good reference for the domestic process systems of the same measuring method from now on to effectively solve this type of problem.
Drawings
FIG. 1 is a schematic structural view of a dissolved oxygen sensor testing apparatus designed by the present invention;
wherein: 1-meter flow cell, 2-flow regulating valve, 3-flowmeter, 4-dial positive and negative pressure gauge, 5-back pressure regulating valve, 6-sampling pipeline interface.
Detailed Description
The technology of the present invention is further described below:
as shown in fig. 1, a dissolved oxygen sensor test apparatus includes: the system comprises an instrument flow cell 1, a flow regulating valve 2, a flowmeter 3, a dial type positive and negative pressure gauge 4, a back pressure regulating valve 5 and a sampling pipeline interface 6; one end of the sampling pipeline interface 6 is connected with a primary loop sampling system through a hose, and the other end of the sampling pipeline interface 6 is sequentially connected with the flow regulating valve 2, the flowmeter 3 and the dial type positive and negative pressure gauge 4 from bottom to top through a stainless steel pipe; an instrument flow cell 1 is also connected between the flowmeter 3 and the dial type positive and negative pressure gauge 4; one end of the instrument flow cell 1 is also connected with a backpressure regulating valve 5.
As mentioned above, the sampling pipeline interface 6 is externally provided with a pagoda mouth quick-mounting joint, and the connection mode of the sampling pipeline interface 6 and a loop sampling system also comprises a cutting sleeve connection.
A method of testing any one of the dissolved oxygen sensor test devices described above, comprising the steps of:
the method comprises the following steps: carrying out a flow test of the dissolved oxygen sensor;
the method comprises the following steps: the back pressure regulating valve 5 is set to be in a full-open state, and the flow of the medium is changed by adjusting the flow regulating valve 2, so that the working flow range of the dissolved oxygen sensor is determined.
Step two: pressure test of the dissolved oxygen sensor was performed:
the method comprises the following steps: and adjusting the flow regulating valve 2 and the back pressure regulating valve 5, and under the condition of testing different pressures in the optimal flow rate state, determining the working pressure range of the dissolved oxygen sensor by measuring the change of the measurement value of the dissolved oxygen sensor.
Step three: determining the optimal operating conditions for the dissolved oxygen sensor,
the method comprises the following steps: after the working flow and pressure range of the dissolved oxygen sensor are determined, the medium pressure in the instrument flow cell 1 is continuously increased in the working pressure range of the dissolved oxygen sensor by adjusting the flow regulating valve 2 and the back pressure regulating valve 5, and the pressure and flow of a loop sampling system under any working condition of chemical manual sampling, automatic sampling analysis of a process analyzer and the like when the measured value of the dissolved oxygen sensor is not influenced are determined, namely the optimal working condition of the dissolved oxygen sensor.
Step four: dissolved oxygen sensor fault detection
The method comprises the following steps: when the dissolved oxygen sensor breaks down, connect high-purity nitrogen gas and oxygen standard gas to dissolved oxygen sensor test device through the hose, through adjusting flow control valve 2 and backpressure governing valve 5, place the dissolved oxygen sensor in best operating condition, can verify dissolved oxygen sensor zero point and slope fast to confirm the trouble root cause.
The present invention has been described in detail with reference to the embodiments, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge of those skilled in the art. The present invention can adopt the prior art for the content which is not described in detail in the present invention.
Claims (2)
1. A dissolved oxygen sensor test device, comprising: the flow meter comprises an instrument flow cell (1), a flow regulating valve (2), a flow meter (3), a dial type positive and negative pressure gauge (4), a back pressure regulating valve (5) and a sampling pipeline interface (6); one end of the sampling pipeline interface (6) is connected with a primary loop sampling system through a hose, and the other end of the sampling pipeline interface (6) is sequentially connected with a flow regulating valve (2), a flow meter (3) and a dial type positive and negative pressure gauge (4) from bottom to top through a stainless steel pipe; an instrument flow cell (1) is connected between the flowmeter (3) and the dial positive and negative pressure gauges (4); one end of the instrument flow cell (1) is also connected with a back pressure regulating valve (5).
2. The dissolved oxygen sensor test device of claim 1, wherein: the sampling pipeline interface (6) is a pagoda mouth quick-mounting joint, and the connection mode of the sampling pipeline interface (6) and a loop sampling system also comprises a cutting sleeve connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920409782.2U CN209821181U (en) | 2019-03-28 | 2019-03-28 | Dissolved oxygen sensor test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920409782.2U CN209821181U (en) | 2019-03-28 | 2019-03-28 | Dissolved oxygen sensor test device |
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| CN209821181U true CN209821181U (en) | 2019-12-20 |
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| CN201920409782.2U Active CN209821181U (en) | 2019-03-28 | 2019-03-28 | Dissolved oxygen sensor test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884263A (en) * | 2019-03-28 | 2019-06-14 | 江苏核电有限公司 | A kind of dissolved oxygen sensor experimental rig and its test method |
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2019
- 2019-03-28 CN CN201920409782.2U patent/CN209821181U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884263A (en) * | 2019-03-28 | 2019-06-14 | 江苏核电有限公司 | A kind of dissolved oxygen sensor experimental rig and its test method |
| CN109884263B (en) * | 2019-03-28 | 2023-12-15 | 江苏核电有限公司 | Dissolved oxygen sensor test device and test method thereof |
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