CN210604480U - Probe device for online detection of dew point corrosion - Google Patents
Probe device for online detection of dew point corrosion Download PDFInfo
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- CN210604480U CN210604480U CN201921026332.1U CN201921026332U CN210604480U CN 210604480 U CN210604480 U CN 210604480U CN 201921026332 U CN201921026332 U CN 201921026332U CN 210604480 U CN210604480 U CN 210604480U
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Abstract
A probe device for online detection of dew point corrosion comprises an upper end gland, an air inlet, an air outlet, a metal shell and a lower end gland; the upper end press cover is provided with a corresponding threading terminal and a temperature sensor interface; the air inlet hole and the air outlet hole are respectively arranged on two sides of the metal shell; and a plurality of series of electrodes are nested in the center of the lower end gland. The utility model discloses utilize many series of electrodes to carry out the precision measurement to dew point temperature, utilize the liquid drop and the interelectrode materialization performance change to obtain the highest temperature of dewfall, the true dew point temperature of sensitive reaction accomplishes the test and the record result of dew point corrosion action on line.
Description
Technical Field
The utility model relates to a dew point corrosion risk aassessment and protection field, concretely relates to on-line measuring dew point corrosion probe device and method.
Background
When the temperature of saturated air in the air with a certain temperature is reduced, water vapor in the air is condensed into dew. The saturation temperature of air containing water vapor is called the dew point temperature. The dew point temperature is determined by the absolute humidity, and small changes in relative humidity will also cause large changes in dew point temperature. Dew condensation (condensation) occurs on the surface of a material at the dew point temperature when the material is slowly cooled by contact with a gas, i.e., dew point corrosion, which is a phenomenon in which the material is corroded by such condensation. The dew point corrosion is complex, so that high requirements are provided for the formation and monitoring of the dew point corrosion, and the seeking of a corrosion detection and monitoring method which is fast, simple, economical, applicable and high in accuracy is urgent. However, to date, dew point corrosion monitoring techniques have yet to be improved.
The current method which is commonly used is to determine the dew point of the gas by observing the condensation state of the gas on a mirror surface in the cooling process by using a mirror surface type dew point instrument, although the observation process can be completed by using a modern optical system, the method is not suitable for measurement in the common process due to the price factor, and the measurement result is easily influenced by the mirror surface pollution, so that the measurement result has positive deviation.
In the other method, an electrolytic dew point meter is used, platinum is used as an electrode, and the humidity of the gas is measured by using the change of the conductivity of the solution of phosphorus pentoxide after water adsorption, so as to obtain the dew point temperature. The measuring method is suitable for measuring low-humidity stable gas, has great limitation, and the gas circuit of the electrolytic cell needs to be dried for a long time before use, has high requirement on gas cleanness, and is not suitable for measuring corrosive gas.
In addition, the vibration frequency method is also commonly used due to the advantages of stable and reliable measurement results, high sensitivity, strong anti-interference performance and the like, however, the resonance frequency of the crystal vibration is related to the cutting mode, the geometric shape, the size and the like of the wafer, different errors can be generated on the measurement results due to different wafers, and the price is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an on-line measuring dew point corrosion probe device, the device utilize many series electrode system to carry out the precision measurement to dew point temperature, utilize the liquid drop and the interelectrode materialization performance change to obtain the highest temperature of dewfall, the true dew point temperature of sensitive reaction accomplishes the test and the record result of dew point corrosion action on line.
In order to achieve the above purpose, the utility model provides an online dew point corrosion detecting probe device, which comprises an upper end gland, an air inlet, an air outlet, a metal shell and a lower end gland; the upper end press cover is provided with a corresponding threading terminal and a temperature sensor interface; the air inlet hole and the air outlet hole are respectively arranged on two sides of the metal shell; and a plurality of series of electrodes are nested in the center of the lower end gland.
Furthermore, the electrode is made of a material which has good heat conductivity, small temperature change and high temperature, high pressure, acid and alkali corrosion resistance; the electrodes adopt a V-shaped shallow groove design, so that dew condensation can well exist between the electrodes, the contact area and the contact range between the electrodes are large enough, and the distance between the electrodes is close enough to ensure a good and durable communication result; the electrodes are designed by adopting multiple electrodes to increase the sensitivity of dew point measurement and improve the precision.
Furthermore, a glass packaging mode which is resistant to high temperature, high pressure and acid and alkali corrosion is adopted between the electrode and the metal shell.
Further, a clamp is arranged at the position of the interface of the temperature sensor to connect the temperature sensor with the electrode, the clamp is in contact with the innermost ring of the electrode, the clamp is made of a material with good heat conduction performance, and the temperature sensor is packaged in a heat insulation mode to guarantee that the temperature sensor can accurately measure the surface temperature of the electrode.
Further, the probe device performs dew point test in a visualized quartz glass container.
The utility model discloses owing to take above technical scheme, it has following advantage:
1) the utility model is simple and easy to operate, has wide measuring range, and can realize lower threshold value compared with the scheme;
2) the utility model can respond for 1min from dry to wet by 90 percent, has high response speed and can be used in the field and a plurality of rapid measurement occasions;
3) the utility model has high measurement precision, reliable measurement result and good repeatability;
4) the utility model has low cost and moderate price;
5) the utility model is simple and easy to install, flexible in volume and does not waste space resources;
6) the utility model discloses a visual design can carry out instant on-line observation to the dew phenomenon. Therefore, the utility model discloses can wide application in dew point corrosion monitoring and corrosion risk aassessment and protection field.
Drawings
FIG. 1 is an exploded view of the probe device for detecting dew point corrosion on line according to the present invention;
in the figure: 1, pressing a cover at the upper end; 2, air inlet holes; 3, air outlet holes; 4 a metal housing; 5, pressing the lower end of the cover; 6, threading a terminal; 7 a temperature sensor interface; 8 electrodes.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1, the utility model provides an online dew point corrosion detecting probe device, which comprises an upper end gland 1, an air inlet 2, an air outlet 3, a metal shell 4 and a lower end gland 5; a corresponding threading terminal 6 and a temperature sensor interface 7 are arranged on the upper end gland 1; the air inlet hole 2 and the air outlet hole 3 are respectively arranged at two sides of the metal shell 4; the center of the lower end gland 5 is nested with a plurality of series of electrodes 8.
The electrodes 8 are designed by adopting a plurality of electrodes to increase the sensitivity of dew point measurement and improve the precision. The electrode is made of materials with good heat-conducting property, small temperature change, high temperature resistance, high pressure resistance, acid and alkali corrosion resistance, such as but not limited to 20 # alloy steel, ND steel, Kairori magnesium alloy and the like.
The design of the electrodes follows the following principles:
1) the V-shaped shallow trench design is adopted between the electrodes, so that the dew can well exist between the electrodes;
2) the contact area and contact range between the electrodes is sufficiently large, the distance between the electrodes is sufficiently close and not short-circuited to each other, to ensure a good and durable communication result.
And a glass packaging mode which is high temperature and high pressure resistant and acid and alkali corrosion resistant is adopted between the electrode and the metal shell. The temperature sensor interface is provided with a clamp 9 to connect the temperature sensor with the electrode, the clamp 9 is contacted with the innermost ring of the electrode, the clamp is made of materials (such as silver, copper, lead, aluminum, iron and the like) with good heat conduction performance, and the temperature sensor is packaged in a heat insulation way to ensure that the temperature sensor can accurately measure the surface temperature of the electrode. The probe apparatus was subjected to dew point testing in a visual quartz glass container.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent embodiments without departing from the scope of the present invention, but all the technical matters of the present invention are within the scope of the present invention.
Claims (4)
1. A probe device for online detection of dew point corrosion is characterized by comprising an upper end gland, an air inlet, an air outlet, a metal shell and a lower end gland;
the upper end press cover is provided with a corresponding threading terminal and a temperature sensor interface;
the air inlet hole and the air outlet hole are respectively arranged on two sides of the metal shell;
and a plurality of series of electrodes are nested in the center of the lower end gland.
2. The on-line dew point corrosion detecting probe device as claimed in claim 1, wherein the electrode is made of a material having good heat conductivity, small temperature variation, high temperature resistance, high pressure resistance, acid and alkali corrosion resistance;
the V-shaped shallow groove design is adopted between the electrodes, so that dew condensation can well exist between the electrodes, the contact area and the contact range between the electrodes are large enough, the distance between the electrodes is close enough, and short circuit does not exist between the electrodes, and a good and durable communication result is ensured.
3. The apparatus of claim 1, wherein a glass package with high temperature and pressure resistance, acid and alkali corrosion resistance is used between the electrode and the metal casing.
4. The apparatus of claim 1, wherein the temperature sensor interface is provided with a clamp for connecting the temperature sensor with the electrode, the clamp is in contact with the innermost ring of the electrode, the clamp is made of a material with good thermal conductivity, and the temperature sensor is packaged in a thermal insulation manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921026332.1U CN210604480U (en) | 2019-07-03 | 2019-07-03 | Probe device for online detection of dew point corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921026332.1U CN210604480U (en) | 2019-07-03 | 2019-07-03 | Probe device for online detection of dew point corrosion |
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| Publication Number | Publication Date |
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| CN210604480U true CN210604480U (en) | 2020-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921026332.1U Active CN210604480U (en) | 2019-07-03 | 2019-07-03 | Probe device for online detection of dew point corrosion |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110231364A (en) * | 2019-07-03 | 2019-09-13 | 中国特种设备检测研究院 | A kind of on-line checking dew point corrosion probe unit |
| CN110231364B (en) * | 2019-07-03 | 2024-05-03 | 中国特种设备检测研究院 | On-line detection dew point corrosion probe device |
-
2019
- 2019-07-03 CN CN201921026332.1U patent/CN210604480U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110231364A (en) * | 2019-07-03 | 2019-09-13 | 中国特种设备检测研究院 | A kind of on-line checking dew point corrosion probe unit |
| CN110231364B (en) * | 2019-07-03 | 2024-05-03 | 中国特种设备检测研究院 | On-line detection dew point corrosion probe device |
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