CN206741326U - A kind of standpipe that water level control is carried out using thermocouple - Google Patents
A kind of standpipe that water level control is carried out using thermocouple Download PDFInfo
- Publication number
- CN206741326U CN206741326U CN201720598482.4U CN201720598482U CN206741326U CN 206741326 U CN206741326 U CN 206741326U CN 201720598482 U CN201720598482 U CN 201720598482U CN 206741326 U CN206741326 U CN 206741326U
- Authority
- CN
- China
- Prior art keywords
- standpipe
- thermocouple
- water level
- carried out
- level control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of standpipe that water level control is carried out using thermocouple, including standpipe, opening on the import connection jet chimney of the standpipe, the outlet of the standpipe is connected with drainpipe, a thermocouple is respectively provided with the high-low position of the standpipe, the drainpipe is provided with drain valve.The utility model has the advantage of：Simple in construction, easy for installation, using thermocouple sensed water level so as to control the mode of power drain valve automatic open close safe and reliable, almost No leakage, suitable for all types of thermal power generation units, avoids turbine water induction and cold steam incident.
Description
Technical field
It the utility model is related to a kind of standpipe, more particularly to a kind of use thermocouple to carry out the hydrophobic of water level control
Collector.
Background technology
In thermal power plant, turbine water induction and cold steam incident are one of accidents most dangerous in steam turbine operation.
Turbine water induction and cold steam can cause cylinder deformation, dynamic and static gaps disappear collide, permanent bending of rotor etc., in thermal power plant
As needed in each important jet chimney (such as cold section of reheaing steam pipe, hot arc reheaing steam pipe, low voltage bypass steam pipe
Road and feed pump turbine steam line etc.) lowest order standpipe is set, and the water level of standpipe is carried out
Detection, make hydrophobic discharge in time, protect the safety of steam turbine.
The water level control of conventional hydrophobic collector uses electric contact level gauging or mechanical float type level switch.Electricity connects
Method electrode sealing easily leakage, and judge threshold value of the electrode in water or in steam --- the critical of point level gauging
Resistance can have differences in unit starting and normal course of operation, need to be adjusted.Mechanical float type level switch installation pipeline
Complexity, guide rod bite easily occur causes to produce failure.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of safe and reliable use thermocouple and carries out water level control
The standpipe of system.
The utility model is that solve above-mentioned technical problem by the following technical programs：One kind carries out water level using thermocouple
The standpipe of control, including standpipe (1), the import of the standpipe (1) connect opening on jet chimney
Mouthful, the outlet of the standpipe (1) is connected with drainpipe (2), is respectively provided with the high-low position of the standpipe (1)
One thermocouple (3), the drainpipe (2) are provided with drain valve (4).
As the technical scheme of optimization, the standpipe (1) is more than or equal to DN150 pipeline using diameter.
As the technical scheme of optimization, the drainpipe (2) uses a diameter of DN50 pipeline.
As the technical scheme of optimization, the outside of the jet chimney and standpipe (1) is surrounded by heat-insulation layer (5).
As the technical scheme of optimization, the heat-insulation layer (5) uses aluminium silicate wool.
As the technical scheme of optimization, the outside of the heat-insulation layer (5), the heat are protruded in the top of the thermocouple (3)
Protrude the inwall of the standpipe (1) in the bottom of galvanic couple (3).
As the technical scheme of optimization, the drain valve (4) uses dynamic valve, and the thermocouple (3) and drain valve (4) are equal
Connect automatic control system.
The utility model has the advantage of：It is simple in construction, it is easy for installation, using thermocouple sensed water level so as to controlling power
The mode of drain valve automatic open close is safe and reliable, almost No leakage, suitable for all types of thermal power generation units, avoids steamer
Machine is intake and cold steam incident.
Brief description of the drawings
Fig. 1 is the structural representation for the standpipe that the utility model carries out water level control using thermocouple.
Embodiment
As shown in figure 1, a kind of standpipe that water level control is carried out using thermocouple, including standpipe 1, draining
Pipe 2, thermocouple 3, drain valve 4 and heat-insulation layer 5.
Opening on the import connection jet chimney of standpipe 1, the outlet of standpipe 1 is connected with drainpipe 2.
Standpipe 1 is more than or equal to DN150 pipeline using diameter, and drainpipe 2 uses a diameter of DN50 pipeline.
The outside of jet chimney and standpipe 1 is surrounded by heat-insulation layer 5, and heat-insulation layer 5 uses aluminium silicate wool.
A thermocouple 3 is respectively provided with the high-low position of standpipe 1, the outer of heat-insulation layer 5 is protruded at the top of thermocouple 3
Portion, the inwall of the bottom protrusion standpipe 1 of thermocouple 3.
Drainpipe 2 is provided with drain valve 4, and drain valve 4 uses dynamic valve, and thermocouple 3 and drain valve 4 are all connected with automatically controlling
System.
Operation principle of the present utility model is：From the thermodynamic behaviour of water and steam, the water of any pressure (or water
Steam) to the saturation temperature that should determine that.The medium temperature that thermocouple is measured and saturation temperature of the medium under relevant work pressure
Degree compares, if the saturation temperature that medium temperature is less than or equal under the operating pressure, it is subcooled water or saturation to illustrate medium
Water (or water vapour)；If medium temperature is more than the saturation temperature under the operating pressure, it is superheated steam to illustrate medium.According to vapour
Turbine operation guidance, steam turbine red switch condition are that the vapor (steam) temperature degree of superheat is not less than 50 DEG C, therefore can be by under media operation pressure
Saturation temperature prevent water and cold steam from entering steam turbine under start and stop and accidental conditions as steam turbines plus 50 DEG C
Protection control condition.
Two thermocouples of the present utility model 3 one are used for the high water level for detecting standpipe 1, when detecting high water level
When, drain valve 4 automatically opens up；Another low water level for being used to detect standpipe 1, when detecting low water level, drain valve 4
It is automatic to close, realize the hydrophobic purpose discharged and closed in time in time.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
All any modification, equivalent and improvement made within new spirit and principle etc., should be included in guarantor of the present utility model
Within the scope of shield.
Claims (7)
1. a kind of standpipe that water level control is carried out using thermocouple, including standpipe (1), the standpipe
(1) the opening on import connection jet chimney, the outlet of the standpipe (1) are connected with drainpipe (2), and its feature exists
In：A thermocouple (3) is respectively provided with the high-low position of the standpipe (1), the drainpipe (2) is provided with drain valve
(4)。
2. the standpipe of water level control is carried out using thermocouple as claimed in claim 1, it is characterised in that：It is described hydrophobic
Collector (1) is more than or equal to DN150 pipeline using diameter.
3. the standpipe of water level control is carried out using thermocouple as claimed in claim 1, it is characterised in that：The draining
Manage the pipeline of (2) using a diameter of DN50.
4. the standpipe of water level control is carried out using thermocouple as claimed in claim 1, it is characterised in that：The steam
The outside of pipeline and standpipe (1) is surrounded by heat-insulation layer (5).
5. the standpipe of water level control is carried out using thermocouple as claimed in claim 4, it is characterised in that：The insulation
Layer (5) uses aluminium silicate wool.
6. the standpipe of water level control is carried out using thermocouple as claimed in claim 4, it is characterised in that：The thermoelectricity
The outside of the heat-insulation layer (5) is protruded at the top of even (3), and the standpipe (1) is protruded in the bottom of the thermocouple (3)
Inwall.
7. the standpipe of water level control is carried out using thermocouple as claimed in claim 1, it is characterised in that：It is described hydrophobic
Valve (4) uses dynamic valve, and the thermocouple (3) and drain valve (4) are all connected with automatic control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720598482.4U CN206741326U (en) | 2017-05-26 | 2017-05-26 | A kind of standpipe that water level control is carried out using thermocouple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720598482.4U CN206741326U (en) | 2017-05-26 | 2017-05-26 | A kind of standpipe that water level control is carried out using thermocouple |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206741326U true CN206741326U (en) | 2017-12-12 |
Family
ID=60568237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720598482.4U Expired - Fee Related CN206741326U (en) | 2017-05-26 | 2017-05-26 | A kind of standpipe that water level control is carried out using thermocouple |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206741326U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576843A (en) * | 2020-12-03 | 2021-03-30 | 北京国电富通科技发展有限责任公司 | Hydrophobic collector and processing method thereof |
-
2017
- 2017-05-26 CN CN201720598482.4U patent/CN206741326U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576843A (en) * | 2020-12-03 | 2021-03-30 | 北京国电富通科技发展有限责任公司 | Hydrophobic collector and processing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171212 Termination date: 20180526 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |