CN214228073U - Generator pure water system expansion tank who possesses hourglass monitor function - Google Patents
Generator pure water system expansion tank who possesses hourglass monitor function Download PDFInfo
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- CN214228073U CN214228073U CN202120085823.4U CN202120085823U CN214228073U CN 214228073 U CN214228073 U CN 214228073U CN 202120085823 U CN202120085823 U CN 202120085823U CN 214228073 U CN214228073 U CN 214228073U
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- expansion tank
- pressure maintaining
- pure water
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Abstract
An expansion tank of a pure water system of a generator with a micro-leakage monitoring function comprises a pressure maintaining tank body, wherein the upper end of the pressure maintaining tank body is provided with a communicated expansion tank body, the caliber of the expansion tank body is smaller than that of the pressure maintaining tank body, one side of the expansion tank body is provided with a variable resistor, one end of the variable resistor is fixedly connected with the upper end of the pressure maintaining tank body, a floater is arranged in the expansion tank body, the floater is provided with a magnetic ring which is fixedly connected, the volume of tiny liquid in the pressure maintaining tank body is changed by arranging the expansion tank body with the caliber which is greatly smaller than that of the pressure maintaining tank body, the expansion tank body can obtain larger liquid level change in the expansion tank body to drive the magnetic ring to move up and down, the magnetic ring drives a contact of the variable resistor to move up and down through magnetic force, so as to change the resistance value of the variable resistor, the current liquid level can be known by detecting the current water temperature, the due liquid level of the expansion tank body can be known under the condition of no leakage according to the water temperature, comparing the actual liquid level measured by the variable resistor, the leakage phenomenon can be known.
Description
Technical Field
The utility model relates to a generator technical field, especially a generator pure water system expansion tank who possesses hourglass monitor function.
Background
The large hydroelectric generating set is provided with a generator pure water system, and a generator stator bar is cooled through the circulating cooling of the closed pure water system. The pure water system of each unit involves thousands of joints or seals, and if water leakage occurs at the positions, the internal short circuit or trip of the generator is caused, so that the sensitive detection of the sealing condition of the connection parts is very important.
The existing generator pure water system monitors whether the pure water system leaks or not by monitoring the liquid level change speed of an expansion water tank arranged at the top of the pure water system, the existing monitoring mode can only reflect the condition that the water leakage of the pure water system is large, and the condition of slow water leakage cannot be reflected; when the temperature of pure water is greatly changed during starting, a signal is easily misreported, and the liquid level change reaction caused by the micro-leakage condition is insensitive.
Disclosure of Invention
The utility model aims to solve the technical problem that a generator pure water system expansion tank who possesses microleakage monitoring function is provided, can detect pure water system liquid level change condition in real time and accurately to judge whether there is the leakage condition to appear according to current liquid temperature.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
the generator pure water system expansion tank with the micro-leakage monitoring function comprises a pressure maintaining tank body, wherein the upper end of the pressure maintaining tank body is provided with an expansion tank body which is communicated with the pressure maintaining tank body, the caliber of the expansion tank body is smaller than that of the pressure maintaining tank body, one side of the expansion tank body is provided with a variable resistor, one end of the variable resistor is fixedly connected with the upper end of the pressure maintaining tank body, a floater is arranged in the expansion tank body, a magnetic ring which is fixedly connected with the floater is arranged on the floater, a resistor contact is arranged opposite to a resistor contact on the variable resistor, the end, close to the magnetic ring, of the resistor contact is a magnetic body, the position of the floater is changed up and down due to the volume change of liquid in the pressure maintaining tank body, and the magnetic ring on the floater drives the resistor contact to move up and down to enable the variable resistor to change so as to reflect the current liquid level.
The floater is provided with a through hole.
The top of the expansion tank body is provided with a breather valve.
And a temperature sensor is arranged in the pressure maintaining tank body or the expansion tank body.
The temperature sensor is a thermistor.
The lower end of the expansion tank body is provided with a floater limiting block.
The utility model provides a pair of generator pure water system expansion tank who possesses little leakage monitoring function, be less than the expansion tank body of the pressurize jar body greatly through setting up the bore, make the internal tiny liquid volume of pressurize jar change, can obtain great liquid level change at the expansion tank is internal, it reciprocates to drive the magnetic ring, the magnetic ring reciprocates through the contact that magnetic force drove the variable resistance, thereby change the resistance of variable resistance, current liquid level can be known to the inspection resistance, simultaneously through detecting current temperature, can learn the expansion tank body should have the liquid level under the condition that does not take place to leak according to the temperature, compare the actual liquid level that the variable resistance recorded, can know and have not take place to leak the phenomenon.
Drawings
The invention will be further explained with reference to the following figures and examples:
fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: the pressure maintaining tank comprises a pressure maintaining tank body 1, an expansion tank body 2, a floater 3, a through hole 4, a magnetic ring 5, a variable resistor 6, a resistor contact 7, a floater limiting block 8, a breather valve 9 and a temperature sensor 10.
Detailed Description
As shown in figure 1, the generator pure water system expansion tank with the micro-leakage monitoring function comprises a pressure maintaining tank body 1, an expansion tank body 2 communicated with the upper end of the pressure maintaining tank body 1 is arranged at the upper end of the pressure maintaining tank body 1, the caliber of the expansion tank body 2 is smaller than that of the pressure maintaining tank body 1, a variable resistor 6 is arranged at one side of the expansion tank body 2, one end of the variable resistor 6 is fixedly connected with the upper end of the pressure maintaining tank body 1, a floater 3 is arranged in the expansion tank body 2, a fixedly connected magnetic ring 5 is arranged on the floater 3, the magnetic ring 5 is arranged opposite to a resistance contact 7 on the variable resistor 6, the end, close to the magnetic ring 5, of the resistance contact 7 is a magnetic body, the position of the floater 3 is changed up and down due to the volume change of liquid in the pressure maintaining tank body 1, the magnetic ring 5 on the floater 3 drives the resistance contact 7 to move up and down to enable the variable resistor 6 to change so as to reflect the current liquid level, the caliber of the expansion tank body 2 is greatly smaller than the caliber of the pressure maintaining tank body 1, so that the change of the liquid level in the expansion tank body 2 can be greatly caused by the small volume change of the pressure maintaining tank body 1, as reflected by the variable resistor 6.
The floater 3 is provided with a through hole 4, the floater and the upper space are not sealed by the through hole 4, and the resistance is small when the liquid level rises.
The top of the expansion tank body 2 is provided with a breather valve 9, when the liquid level rises, the air in the upper space can be decompressed through the breather valve 9 when exceeding a certain pressure, so that the rising and the falling of the liquid level are not influenced by pressure.
The temperature sensor 10 is arranged in the pressure maintaining tank body 1 or the expansion tank body 2, the float 3 in the expansion tank body 2 is fixed with the magnetic ring 5, when the liquid level in the expansion tank body 2 changes, the resistance contact 7 is driven to change along with the liquid level through the magnetic force of the magnetic ring 5, so that the liquid level change signal is converted into a resistance signal, the variable resistor 6 is matched with the temperature measuring resistance value of the temperature sensor 10 through selecting a proper resistor and a proper temperature measuring resistor, if the temperature measuring resistor selects a platinum resistor, and under the condition that a pure water system does not leak, the resistance value measured at any position of the float 3 by the resistance contact 7 is consistent with the temperature measuring resistance value.
Under normal conditions, when the temperature of pure water is increased or reduced, the liquid level of the expansion tank body 2 is synchronously increased or reduced, the resistance values of the temperature measuring resistor and the resistor are simultaneously increased or reduced, the two paths of resistance signals are sent to a controller for comparison, if the resistance value of the resistor is lower than the resistance value of the temperature measuring resistor, the liquid level is reduced, a pure water system leaks, and the controller generates an alarm signal; the larger the resistance difference, the higher the alarm level.
The temperature sensor 10 is a thermistor.
The lower end of the expansion tank body 2 is provided with a floater limiting block 8.
Claims (6)
1. The generator pure water system expansion water tank with the microleakage monitoring function is characterized by comprising a pressure maintaining tank body (1), wherein the upper end of the pressure maintaining tank body (1) is provided with a communicated expansion tank body (2), the caliber of the expansion tank body (2) is smaller than that of the pressure maintaining tank body (1), one side of the expansion tank body (2) is provided with a variable resistor (6), one end of a variable resistor (6) is fixedly connected with the upper end of a pressure maintaining tank body (1), a floater (3) is arranged in an expansion tank body (2), a magnetic ring (5) which is fixedly connected is arranged on the floater (3), the magnetic ring (5) is arranged opposite to a resistor contact (7) on the variable resistor (6), the end, close to the magnetic ring (5), of the resistor contact (7) is a magnetic body, the position of the floater (3) is changed up and down due to the volume change of liquid in the pressure maintaining tank body (1), and the magnetic ring (5) on the floater (3) drives the resistor contact (7) to move up and down to enable the variable resistor (6) to change so as to reflect the current liquid level.
2. The expansion tank with the micro-leakage monitoring function for the pure water system of the generator as claimed in claim 1, which is characterized in that: the floater (3) is provided with a through hole (4).
3. The expansion tank with the micro-leakage monitoring function for the pure water system of the generator as claimed in claim 2, which is characterized in that: the top of the expansion tank body (2) is provided with a breather valve (9).
4. The expansion tank of a pure water system of a generator with a micro-leakage monitoring function as claimed in claim 3, wherein: and a temperature sensor (10) is arranged in the pressure maintaining tank body (1) or the expansion tank body (2).
5. The expansion tank with the micro-leakage monitoring function for the pure water system of the generator as claimed in claim 4, wherein: the temperature sensor (10) is a thermistor.
6. The expansion tank with the micro-leakage monitoring function for the pure water system of the generator as claimed in claim 1, which is characterized in that: the lower end of the expansion tank body (2) is provided with a floater limiting block (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120085823.4U CN214228073U (en) | 2021-01-13 | 2021-01-13 | Generator pure water system expansion tank who possesses hourglass monitor function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120085823.4U CN214228073U (en) | 2021-01-13 | 2021-01-13 | Generator pure water system expansion tank who possesses hourglass monitor function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214228073U true CN214228073U (en) | 2021-09-17 |
Family
ID=77689543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120085823.4U Active CN214228073U (en) | 2021-01-13 | 2021-01-13 | Generator pure water system expansion tank who possesses hourglass monitor function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214228073U (en) |
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2021
- 2021-01-13 CN CN202120085823.4U patent/CN214228073U/en active Active
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