CN215449081U - Condensed water detection device for steam pipeline - Google Patents
Condensed water detection device for steam pipeline Download PDFInfo
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- CN215449081U CN215449081U CN202121380123.4U CN202121380123U CN215449081U CN 215449081 U CN215449081 U CN 215449081U CN 202121380123 U CN202121380123 U CN 202121380123U CN 215449081 U CN215449081 U CN 215449081U
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Abstract
The utility model relates to the technical field of pipeline detection, and discloses a condensate water detection device for a steam pipeline, which comprises a first temperature measurement device, a second temperature measurement device and a temperature difference monitoring device, wherein the first temperature measurement device is used for measuring the temperature of a first set position of the steam pipeline, the second temperature measurement device is used for measuring the temperature of a second set position of the steam pipeline, the first set position is positioned at the bottom of the steam pipeline, and the second set position is higher than the first set position; the temperature difference monitoring device is connected with the first temperature measuring device and the second temperature measuring device to monitor the difference between the measured value of the first temperature measuring device and the measured value of the second temperature measuring device. The utility model judges the existence condition of the condensed water in the steam pipeline by using the measured temperature difference, reduces the risk of water inlet in the steam turbine, reduces the risk of cavitation erosion and damage of the steam turbine, and improves the safety and reliability of the operation of the steam turbine set.
Description
Technical Field
The utility model relates to the technical field of pipeline detection, in particular to a condensed water detection device for a steam pipeline.
Background
The thermal power plant has many steam pipelines for delivering superheated steam to a steam turbine for expansion to perform work. When the steam pipe has a slope, liquid water is easily accumulated at the lowest point of the steam pipe. If liquid water is stored in the steam pipeline, the liquid water can enter the steam turbine under the carrying of high-temperature steam, and the blades of the steam turbine rotating at a high speed can be rotten by the liquid water, so that the cavitation phenomenon is caused, and the service life of the steam turbine is shortened. If too much water is accumulated, a large amount of water directly rushes into the turbine, so that the turbine can be directly damaged, the turbine is scrapped, and huge economic loss is caused.
At present, a drain pipe is usually connected to the lowest point of a steam pipe, the drain pipe is connected to a steam condenser through a steam trap, a valve and the like, and if condensed water exists, liquid water flows out of the steam condenser along the drain pipe to ensure that no liquid water exists in the steam pipe. However, due to the reasons of the fault of the drainage device, the unreasonable arrangement form, the excessive amount of the temperature-reducing water and the like, the drainage is not smooth, water is stored in the steam pipeline, the existing drainage pipeline can only drain water, but the existence of accumulated water in the steam pipeline cannot be detected, and the steam turbine is easily damaged.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, an object of the present invention is to provide a condensed water detection device for a steam pipeline, so as to solve the problem that the existing water drainage pipeline can only drain water, but cannot detect whether water is accumulated in the steam pipeline.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the condensed water detection device for the steam pipeline comprises a first temperature measurement device, a second temperature measurement device and a temperature difference monitoring device, wherein the first temperature measurement device is used for measuring the temperature of a first set position of the steam pipeline, the second temperature measurement device is used for measuring the temperature of a second set position of the steam pipeline, the first set position is positioned at the bottom of the steam pipeline, and the second set position is higher than the first set position; the temperature difference monitoring device is connected with the first temperature measuring device and the second temperature measuring device to monitor the difference between the measured value of the first temperature measuring device and the measured value of the second temperature measuring device.
Preferably, a vertical distance between the second set position and the first set position is 5 times or more of a pipe diameter of the steam pipe.
Preferably, the first set position is located at the lowest point of the bottom of the steam pipe.
Preferably, the temperature difference monitoring device comprises a monitoring module and an alarm module, wherein the monitoring module is in electrical signal connection with the alarm module.
Preferably, the condensed water detection device further comprises a control terminal electrically connected with the temperature difference monitoring device, the first temperature measurement device and the second temperature measurement device.
Preferably, the first temperature measuring device and the second temperature measuring device are both temperature sensors, the first temperature measuring device is disposed at the first setting position, and the second temperature measuring device is disposed at the second setting position.
Preferably, the first temperature measuring device and the second temperature measuring device are both thermocouples attached to the outer wall of the steam pipeline.
Preferably, the condensed water detection device further includes a calibration device to calibrate the temperature difference at the first set position and the second set position to zero in advance.
Preferably, the temperature difference monitoring device is a temperature difference meter.
Compared with the prior art, the condensed water detection device for the steam pipeline has the beneficial effects that:
the condensed water detection device for the steam pipeline of the embodiment of the utility model monitors the temperature difference between two set positions on the steam pipeline through the temperature difference monitoring device, and judges whether condensed water exists in the steam pipeline. If the steam pipeline has condensed water, the temperature of the first set position is reduced, and the temperature of the second set position is unchanged, so that the temperature difference between the two set positions is increased, the larger the temperature difference is, the more the condensed water in the steam pipeline is represented, the more the condensed water in the steam pipeline is detected conveniently, the risk of water inlet in the steam turbine is reduced, the risk of cavitation erosion and damage of the steam turbine is reduced, and the safety and reliability of the operation of the steam turbine set are improved.
Drawings
Fig. 1 is a schematic structural diagram of a condensed water detection apparatus for a steam pipeline according to an embodiment of the present invention;
in the figure, 1, a first temperature measuring device; 2. a second temperature measuring device; 3. a temperature difference monitoring device; 4. a steam line; 41. a first steam line; 42. a second steam line; 5. a hydrophobic pipeline.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.
As shown in fig. 1, a condensate water detecting apparatus for a steam pipe according to a preferred embodiment of the present invention includes a first temperature measuring device 1, a second temperature measuring device 2 and a temperature difference monitoring device 3, wherein the first temperature measuring device 1 is configured to measure a temperature at a first set position of the steam pipe 4, the second temperature measuring device 2 is configured to measure a temperature at a second set position of the steam pipe 4, the first set position is located at a bottom of the steam pipe 4, and the second set position is higher than the first set position; the temperature difference monitoring device 3 is connected to the first temperature measuring device 1 and the second temperature measuring device 2 to monitor the difference between the measured value of the first temperature measuring device 1 and the measured value of the second temperature measuring device 2, i.e., the temperature difference between the first set position and the second set position. When no condensed water exists in the steam pipeline 4, the measured value of the first temperature measuring device 1 is equal to or has little difference with the measured value of the second temperature measuring device 2, so that the temperature difference monitored by the temperature difference monitoring device 3 is zero or very small and can be ignored. When condensed water exists in the steam pipeline 4, the condensed water can cause the local temperature at the first set position to be reduced, the second set position is higher than the first set position, the temperature at the second set position is not influenced by the condensed water or is influenced by the condensed water to be very small, the temperature at the second set position is not changed or is not changed greatly, a difference value exists between the measured value of the first temperature measuring device 1 and the measured value of the second temperature measuring device 2, and the temperature difference monitored by the temperature difference monitoring device 3 is increased. Also, the more the condensate water, the lower the temperature at the first set point, and the greater the temperature difference between the two set points. Therefore, the larger the temperature difference between the first set position and the second set position detected by the temperature difference monitoring device 3, the more condensed water in the steam pipe 4 is indicated.
The utility model can judge whether the steam pipeline 4 has the condensed water and the amount of the condensed water by utilizing the temperature difference between the two set positions of the steam pipeline 4, is convenient to monitor the condensed water in the steam pipeline 4, prevents the condensed water from entering the steam turbine to damage the steam turbine, and improves the safety and reliability of the operation of the steam turbine set.
As shown in fig. 1, in the present embodiment, the steam pipeline 4 includes a first steam pipeline 41 and a second steam pipeline 42, wherein the first steam pipeline 41 is horizontally disposed, the second steam pipeline 42 is vertically disposed, and the first steam pipeline 41 and the second steam pipeline 42 are transitionally connected by an elbow; the first steam pipe 41 is easy to store condensed water, and the bottom of the first steam pipe 41 is provided with a drain pipe 5 to discharge the stored condensed water in time. The first setting position is arranged at the bottom of the first steam pipeline 41 and close to the drain pipeline 5; preferably at the lowest point of the bottom of the first steam pipe 41, where the condensate is most likely to accumulate. The second setting position is preferably set at a position where water is not easily stored in the second steam line 42. Preferably, the vertical distance between the second setting position and the first setting position is more than 5 times of the pipe diameter of the steam pipe 4, so that the steam pipe 4 at the second setting position is not easy to accumulate condensed water, and the influence caused by heat conduction is reduced, so that when the temperature at the first setting position is reduced due to the condensed water, the temperature at the second setting position is not influenced by the heat conduction of the pipe wall of the steam pipe 4, and the temperature at the second setting position is not influenced by the condensed water. It should be noted that the first setting position and the second setting position shown in fig. 1 are merely exemplary.
In this embodiment, the first temperature measuring device 1 and the second temperature measuring device 2 are both temperature sensors, the first temperature measuring device 1 is disposed at the first setting position, and the second temperature measuring device 2 is disposed at the second setting position. Preferably, the first temperature measuring device 1 and the second temperature measuring device 2 are both thermocouples attached to the outer wall of the steam pipe 4. Specifically, a thermocouple is attached to the outer wall of the first steam pipe 41 at a first set position, and a thermocouple is attached to the outer wall of the second steam pipe 42 at a second set position. The utility model uses the thermocouple to measure the temperature, does not need to arrange a mounting hole on the steam pipeline 4, and directly pastes the thermocouple at the corresponding position of the outer wall of the pipeline, thus having convenient and rapid installation and convenient disassembly.
Further, the condensed water detection device further comprises a calibration device, so that the temperature difference between the first set position and the second set position is calibrated to be zero in advance, and when the condition of the condensed water in the steam pipeline 4 is judged according to the monitored temperature difference, the influence of the initial temperature difference on the judgment result is small.
In this embodiment, the temperature difference monitoring device 3 is a temperature difference meter, and is connected between the first temperature measuring device 1 and the second temperature measuring device 2.
In this embodiment, the temperature difference monitoring device 3 includes a monitoring module and an alarm module, wherein the monitoring module is electrically connected to the alarm module, and the monitoring module is configured to monitor a difference between measured values of the first temperature measuring device 1 and the second temperature measuring device 2 to obtain a temperature difference between a first set position and a second set position; the alarm module is used for giving an alarm when the temperature difference monitored by the monitoring module is larger than a set threshold value, so that a worker can process the condensed water in the steam pipeline 4 in time, wherein the set threshold value can be determined according to the temperature measurement error range of the temperature difference meter, for example, when the temperature measurement error range is 5%, the alarm can be given out when the temperature difference exceeds 5%.
In this embodiment, the condensed water detection device further includes a control terminal electrically connected to the temperature difference monitoring device 3, the first temperature measurement device 1, and the second temperature measurement device 2. Control terminal is used for receiving temperature difference monitoring devices 3, first temperature measuring device 1 and second temperature measuring device 2's measuring signal to the temperature of the first position of setting, the second position of setting is set for in the demonstration directly perceivedly, and the difference in temperature of two positions of setting for, so that carry out on-line monitoring to the temperature of steam pipe.
The working process of the utility model is as follows:
a thermocouple is attached to each of the first set position of the first steam pipe 41 and the second set position of the second steam pipe 42, and a temperature difference meter is connected thereto. And calibrating the temperature difference meter, and calibrating the initial temperature difference between the first set position and the second set position to be zero. When the steam pipeline 4 normally works, the temperature difference value monitored by the temperature difference meter is constantly zero, and at the moment, when condensate water is generated in the steam pipeline 4, the condensate water can be discharged through the drain pipeline 5, so that the condensate water cannot be accumulated in the steam pipeline 4. When jam or other trouble appear in drain pipe 5, when leading to the comdenstion water to store up in steam conduit 4, because the temperature of comdenstion water is less than the temperature of steam, make the temperature of first settlement position department receive the influence of comdenstion water and reduce, and second settlement position department is owing to there is not the comdenstion water, the temperature can not receive the influence, still be approximately equal to the temperature of steam, the water yield of comdenstion water is more, the temperature of first settlement position department is lower, the difference in temperature increase that the difference in temperature meter monitored, when the difference in temperature surpassed and set for the threshold value, send the police dispatch newspaper, can effectively avoid because of the steam turbine destruction that hydrophobic unsmooth leads to.
To sum up, the embodiment of the present invention provides a condensed water detection device for a steam pipeline 4, which monitors a temperature difference between two set positions on the steam pipeline 4 through a temperature difference monitoring device 3 to determine whether condensed water exists in the steam pipeline 4. If the condensed water exists in the steam pipeline 4, the temperature of the first set position is reduced, and the temperature of the second set position is unchanged, so that the temperature difference between the two set positions is increased, and the larger the temperature difference is, the more the condensed water in the steam pipeline 4 is represented, thereby conveniently detecting the existence condition of the condensed water in the steam pipeline 4, reducing the risk of water inflow in the steam turbine, reducing the risk of cavitation erosion and damage of the steam turbine, and improving the safety and reliability of the operation of the steam turbine set. In addition, the utility model can utilize the thermocouple to measure the temperature of the steam pipeline 4, the installation is convenient and simple, no hole is needed, and only the corresponding measuring thermocouple is needed to be attached to the outer wall of the steam pipeline 4. In addition, the utility model can realize remote online monitoring by using the control terminal, and monitor the temperature of the steam pipeline 4 and the temperature difference between the two set positions in real time, so as to facilitate the timely treatment of the condensed water in the steam pipeline 4 and further improve the safe reliability of the operation of the steam turbine set.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (9)
1. A condensate detection device for a steam line, comprising:
the temperature measurement device comprises a first temperature measurement device, a second temperature measurement device and a temperature difference monitoring device, wherein the first temperature measurement device is used for measuring the temperature of a first set position of a steam pipeline, the second temperature measurement device is used for measuring the temperature of a second set position of the steam pipeline, the first set position is located at the bottom of the steam pipeline, and the second set position is higher than the first set position; the temperature difference monitoring device is connected with the first temperature measuring device and the second temperature measuring device to monitor the difference between the measured value of the first temperature measuring device and the measured value of the second temperature measuring device.
2. The condensate detecting apparatus for a steam pipe according to claim 1, wherein a vertical distance between the second set position and the first set position is 5 times or more a pipe diameter of the steam pipe.
3. The condensate detecting apparatus for a steam line as claimed in claim 1, wherein the first set position is located at a lowest point of a bottom of the steam line.
4. The condensate detection apparatus for a steam pipeline according to claim 1, wherein the temperature difference monitoring device comprises a monitoring module and an alarm module, wherein the monitoring module is electrically connected with the alarm module.
5. The condensate detection apparatus for a steam line of claim 1, further comprising a control terminal in electrical signal connection with the temperature difference monitoring device, the first temperature measurement device and the second temperature measurement device.
6. The condensate detection apparatus for a steam line of claim 1, wherein the first temperature measurement device and the second temperature measurement device are both temperature sensors, the first temperature measurement device being disposed at the first set position, the second temperature measurement device being disposed at the second set position.
7. The condensate detection apparatus for a steam line of claim 6, wherein the first temperature measurement device and the second temperature measurement device are each a thermocouple attached to an outer wall of the steam line.
8. The condensate detecting device for a steam pipe according to claim 7, further comprising a calibration means to calibrate the temperature difference at the first set position and the second set position to zero in advance.
9. The condensate detection apparatus for a steam line of claim 1, wherein the temperature difference monitoring device is a temperature difference meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121380123.4U CN215449081U (en) | 2021-06-18 | 2021-06-18 | Condensed water detection device for steam pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121380123.4U CN215449081U (en) | 2021-06-18 | 2021-06-18 | Condensed water detection device for steam pipeline |
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| Publication Number | Publication Date |
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| CN215449081U true CN215449081U (en) | 2022-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121380123.4U Active CN215449081U (en) | 2021-06-18 | 2021-06-18 | Condensed water detection device for steam pipeline |
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| CN (1) | CN215449081U (en) |
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2021
- 2021-06-18 CN CN202121380123.4U patent/CN215449081U/en active Active
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