CN210071463U - Hydrogen leakage monitoring, sampling and cooling device for internal cold water tank - Google Patents
Hydrogen leakage monitoring, sampling and cooling device for internal cold water tank Download PDFInfo
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- CN210071463U CN210071463U CN201821907348.9U CN201821907348U CN210071463U CN 210071463 U CN210071463 U CN 210071463U CN 201821907348 U CN201821907348 U CN 201821907348U CN 210071463 U CN210071463 U CN 210071463U
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Abstract
The hydrogen leakage monitoring, sampling and cooling device for the internal cold water tank comprises an air inlet interface, a self-sealing valve, a cylindrical finned radiator, a multi-layer steam-water condensation and separation mechanism and an air outlet interface; the cylindrical finned radiator is arranged vertical to the ground, a cylindrical cavity is arranged in the cylindrical finned radiator, the lower end of the cylindrical cavity is connected with an air outlet of the self-sealing valve, an air inlet of the self-sealing valve is connected with an air inlet interface, an air outlet is arranged at the upper end of the cylindrical cavity and connected with an air outlet interface, and a multilayer steam-water condensation separation mechanism is further arranged in the cylindrical cavity; the multilayer steam-water condensation separation mechanism comprises a plurality of water diversion baffles and connecting rods, each water diversion baffle is provided with a fixing hole, and the connecting rods penetrate through the fixing holes of each water diversion baffle and are fixedly connected with the fixing holes. The utility model discloses simple structure, easily installation can avoid containing the inaccurate problem that leaks hydrogen detection data and leak hydrogen probe life-span shorten that a large amount of vapor lead to in the interior cold water tank sampling gas for leak hydrogen monitor probe testing result is more accurate, and effectively prolong leak hydrogen monitor probe's life.
Description
Technical Field
The utility model relates to a cooling device of vapor in filtering sample gas especially relates to a cooling device is sampled in monitoring of cold water tank hydrogen leakage in generating set.
Background
A water-hydrogen cooling type generator set, wherein [ water ] is a stator winding and an outgoing line which are cooled in (stator cooling) water; [ HYDROGEN ] is the internal cooling of the rotor winding with hydrogen; [ HYDROGEN ] is the working mode that the stator core and the rotor body are cooled by hydrogen. Therefore, the generator is provided with a hydrogen system, an internal cooling water system and a sealing oil system (to prevent hydrogen gas from leaking out of the shaft seal).
Because hydrogen has strong permeability, under the condition that the sealing of a cooling system of a certain generator is not ideal, the hydrogen in the generator can leak out of a shell of the generator or cold water in a stator winding, and the hydrogen in the cold water means that the humidity of the hydrogen in the generator is increased.
The generator hydrogen leakage monitoring device is important monitoring equipment for ensuring the safe operation of the hydrogen-cooled generator, and the monitored object is the tightness of a stator winding water internal cooling system, a closed bus thereof and a sealing oil system. The monitoring of the water system is particularly important, and because the hydrogen pressure of the generator is higher than the water pressure, when the cold water system in the stator has leakage faults, the hydrogen in the cold water tank in the stator should escape. The hydrogen leakage fault in the inner cold water is possibly caused by insulation of a coil bar and abrasion of a copper wire, and is also possibly caused by other reasons such as sealing failure of a water joint, welding seam open welding, damage of an insulated water conduit and the like, and because various leakage faults can cause interphase short circuit accidents or ground short circuit accidents, once the increase of the hydrogen leakage quantity of the inner cold water system is detected, serious accident precursors are indicated, so the generator hydrogen leakage monitoring device has important functions of real-time monitoring and early fault alarm. The basic requirements of the device are that the device can work stably for a long time, and faults are not reported by mistake or missed.
Twenty-five countermeasures (twenty-five key requirements for preventing power production accidents) stipulate that a hydrogen leakage monitoring device should be additionally arranged on the hydrogen-cooled generator. According to the knowledge, most hydrogen-cooled generators of power plants in China are provided with hydrogen leakage monitoring devices, and in the aspect of hydrogen leakage monitoring of an internal cold water tank, a hydrogen leakage monitoring probe (sensor) is in an electrochemical type and a catalytic combustion type, so that the coverage of the two products is large. Catalytic combustion sensors have the advantage of being durable, but have a low measurement accuracy. The electrochemical sensor for detecting the hydrogen content has the advantages of high precision and long service life, but the phenomenon of inaccurate detection also exists.
According to market research carried out by our company, it is found that a hydrogen leakage monitoring device (mainly an electrochemical monitoring probe) equipped for a cold water tank in a hydrogen-cooled generator set can be used normally for a long time and is almost free, and the phenomenon of inaccurate detection result exists. Aiming at the problem that the detection result of the electrochemical sensor for the hydrogen leakage content of the internal cooling water tank is inaccurate, the technical personnel of the company find that the phenomenon is mainly caused by the problem of sampling of hydrogen leakage measurement of the internal cooling water.
The sensing probe of the hydrogen leakage monitoring device is generally arranged at the top of the internal cold water tank, theoretically, the sampled gas should be the gas containing hydrogen which is leaked and collected at the top of the internal cold water tank, but actually, the gas sampled from the top of the internal cold water tank does not only contain hydrogen, but also contains water vapor from internal cold water, and the temperature of the gas is about 60-70 ℃.
At the present stage, the electrochemical sensor for detecting hydrogen mainly utilizes the diaphragm to separate water and then detects the content of hydrogen, but the diaphragm can not completely and thoroughly separate water vapor contained in the sampled gas, so that the inaccuracy of the detection result of the content of leaked hydrogen is directly caused, accumulated water can be formed inside the hydrogen leakage monitoring probe in the past, and finally the service life of the hydrogen leakage monitoring probe is shortened.
Therefore, the actual sampling gas needs to be detected after being cooled and filtered to remove water vapor, so that the service life of the hydrogen leakage monitoring probe is prolonged, and the working stability and reliability are improved.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a cooling device which can effectively reduce the water vapor content in the hydrogen leakage monitoring and sampling gas of an inner cooling water tank, and then can prolong the service life of a hydrogen leakage monitoring probe and improve the accuracy of detection.
The utility model adopts the technical proposal that: the hydrogen leakage monitoring, sampling and cooling device for the internal cold water tank comprises an air inlet interface, a self-sealing valve, a cylindrical finned radiator, a multi-layer steam-water condensation and separation mechanism and an air outlet interface;
the cylindrical finned radiator is arranged vertical to the ground, a cylindrical cavity is arranged in the cylindrical finned radiator, the lower end of the cylindrical cavity is connected with an air outlet of the self-sealing valve, an air inlet of the self-sealing valve is connected with an air inlet interface, an air outlet is arranged at the upper end of the cylindrical cavity and connected with an air outlet interface, and a multilayer steam-water condensation separation mechanism is arranged in the cylindrical cavity from the air outlet of the self-sealing valve to the air outlet at the upper end of the cylindrical;
the multilayer steam-water condensation separation mechanism comprises a plurality of water diversion baffles and connecting rods, each water diversion baffle is provided with a fixing hole, the connecting rods penetrate through the fixing holes of each water diversion baffle and are fixedly connected with the water diversion baffles, and all the water diversion baffles are fixed on the connecting rods to form a whole.
The water distribution baffles are arranged in parallel and are regularly distributed along the direction of the connecting rod, at least one water vapor transmission hole is formed in each layer of water distribution baffle except for the fixing hole, and the water distribution baffles are designed in an inclined mode.
The cylindrical finned radiator is made of aluminum section, Y-shaped radiating fins are distributed on the outer surface, and the root of the Y is connected with the radiator main body.
The cylindrical finned radiator is made of metal aluminum profiles with good heat conductivity, light weight and easy processing, and the Y-shaped radiating fins are distributed on the outer surface, so that the effective radiating area of the radiator is increased to a great extent, and the radiating performance is improved. A multi-layer steam-water condensation separation mechanism consisting of a water diversion baffle and a connecting rod is arranged in a hollow pipe cavity in the radiator.
After entering from the air inlet, the sampled gas sequentially enters the self-sealing valve, the cylindrical finned radiator and the multi-layer steam-water condensation separation mechanism in the inner cavity of the cylindrical finned radiator, and finally reaches the hydrogen leakage monitoring probe through the air outlet interface.
In the process, the self-sealing valve is in a normally open state, when the water level in the inner cooling water tank rises abnormally, the floating ball of the self-sealing valve is jacked up, the self-sealing valve is closed, water is isolated at the bottom of the device, and therefore the hydrogen leakage monitoring probe arranged at the upper end of the radiator and the air outlet connector is protected from being broken down due to abnormal rising of the water level of the inner cooling water tank.
The multi-layer steam-water condensation separation mechanism plays a role in heat dissipation and condensation of the sampled gas, namely a large amount of steam in the sampled gas at the temperature of 60-70℃ is naturally cooled into water after being blocked layer by the multi-layer water-dividing baffle plates. The water diversion baffle adopts an inclined design, so that on one hand, the contact area can be increased, and on the other hand, the saturated water condensed on the water diversion baffle is convenient to converge and flow downwards. The water condensed on the water dividing baffle and the pipe wall flows back to the inner cooling water tank along the inclined water dividing baffle or the hollow pipe wall in the radiator.
Through the comprehensive cooling of the radiator and the multi-layer steam-water condensation separation mechanism, the steam in the sampled gas finally reaching the hydrogen content sensor is effectively cooled and isolated, so that the accuracy and the reliability of the hydrogen content monitoring are ensured.
When the device is implemented on site, the device is installed at the top of the inner cooling water tank through the ball valve, the ball valve is kept in a normally open state during normal work, and the device can be detached by closing the ball valve when needing to be overhauled or replaced, so that maintenance is carried out.
The utility model discloses the effectual steam content that has reduced the interior cold water tank in sample gas has improved the reliability of the degree of accuracy of hydrogen leakage monitor test result, has effectively prolonged hydrogen leakage monitor's life, has still reduced the maintenance cost and the maintainer's of enterprise work load simultaneously.
Drawings
Fig. 1 is a schematic view of the internal structure of the present invention;
FIG. 2 is a cross-sectional view of the heat sink of the present invention;
fig. 3 is a schematic view of the field installation of the present invention.
Detailed Description
As shown in fig. 1 and fig. 2, the hydrogen leakage monitoring, sampling and cooling device for the internal cooling water tank of the present invention comprises an air inlet port 1, a self-sealing valve 2, a cylindrical fin radiator 3, a multi-layer steam-water condensation and separation mechanism 4 and an air outlet port 5;
the cylindrical finned radiator 3 is vertically arranged, a cylindrical cavity is formed in the cylindrical finned radiator, the lower end of the cylindrical cavity is connected with an air outlet of the self-sealing valve 2, an air inlet of the self-sealing valve 2 is connected with an air inlet interface 1, an air outlet at the upper end of the cylindrical cavity is connected with an air outlet interface 5, and a plurality of layers of steam-water condensation separation mechanisms 4 are arranged in the cylindrical cavity from the air outlet of the self-sealing valve 2 to the air outlet at the upper end of the cylindrical cavity;
the multi-layer steam-water condensation separation mechanism 4 comprises a plurality of water diversion baffles 6 and connecting rods 7, wherein each water diversion baffle 6 is provided with a fixing hole 9, each connecting rod 7 penetrates through the fixing hole 9 of each water diversion baffle 6 and is fixedly connected with the water diversion baffle 9, and all the water diversion baffles 6 are fixed on the connecting rods 7 to form a whole.
Each water diversion baffle 7 is arranged in parallel and regularly distributed along the direction of the connecting rod 8, at least one water vapor transmission hole 10 is also arranged on each water diversion baffle 7 besides the fixing hole 8, and the water diversion baffles 7 adopt an inclined design.
The cylindrical fin radiator 3 is made of aluminum section, Y-shaped radiating fins 11 are distributed on the outer surface, and the root of the Y is connected with the radiator main body.
The cylindrical finned radiator 3 is made of metal aluminum profiles with good heat conductivity, light weight and easy processing, and the Y-shaped radiating fins 11 are distributed on the outer surface, so that the effective radiating area of the radiator is increased to a great extent, and the radiating performance is improved.
After entering from the air inlet interface 1, the sampled gas sequentially enters the self-sealing valve 2, the cylindrical finned radiator 3 and the multilayer steam-water condensation separation mechanism 4 in the inner cavity of the cylindrical finned radiator, and finally reaches the hydrogen leakage monitoring probe 10 through the air outlet interface 5.
In the process, the self-sealing valve 2 is in a normally open state, when the water level in the inner cooling water tank rises abnormally, a floating ball in the self-sealing valve is jacked up, the self-sealing valve 2 is closed, and water is isolated at the bottom of the device, so that the hydrogen leakage monitoring probe 10 arranged on the air outlet interface 5 at the upper end of the radiator 3 is protected from being broken down due to the abnormal rise of the water level of the inner cooling water tank.
The multi-layer steam-water condensation separation mechanism 4 plays a role in heat dissipation and condensation of the sampled gas, and a large amount of steam in the sampled gas at the temperature of 60-70℃ is naturally cooled into water after being blocked by the multi-layer water division baffle plates layer by layer. The water diversion baffle 6 adopts an inclined design, so that the contact area can be increased, and the saturated water condensed on the surface of the water diversion baffle can be conveniently and quickly gathered and flow downwards. The water condensed on the water dividing baffle 6 and the pipe wall flows back to the inner cold water tank along the inclined water dividing baffle 6 or along the hollow pipe wall in the radiator.
Through the comprehensive cooling of the cylindrical finned radiator 3 and the multi-layer steam-water condensation separation mechanism 4, the steam in the sampled gas finally reaching the hydrogen leakage monitoring probe 10 is effectively isolated, so that the accuracy and the reliability of hydrogen leakage monitoring are ensured.
In the embodiment, the lower end of the self-sealing valve 2 and the air inlet interface 1, and the upper end of the cylindrical cavity in the radiator 3 and the air outlet interface 5 are connected by threads, so that the installation and the maintenance are simpler and more convenient.
In fig. 3, when the device is implemented on site, the device is installed at the top of an inner cooling water tank through a ball valve 12, the ball valve 12 is kept in a normally open state during normal operation, and the device can be detached by closing the ball valve 12 when maintenance or replacement is needed, so that maintenance is performed.
The present embodiment is not intended to limit the shape, material, structure, etc. of the present invention in any form, and all of the technical matters of the present invention belong to the protection scope of the present invention to any simple modification, equivalent change and modification made by the above embodiments.
Claims (4)
1. Interior cold water tank hydrogen leakage monitoring sampling cooling device, its characterized in that: the device comprises an air inlet interface, a self-sealing valve, a cylindrical finned radiator, a multi-layer steam-water condensation separation mechanism and an air outlet interface;
the cylindrical finned radiator is placed perpendicular to the ground, a cylindrical cavity is formed in the cylindrical finned radiator, the lower end of the cylindrical cavity is connected with a gas outlet of a self-sealing valve, a gas inlet port is connected with a gas inlet of the self-sealing valve, a gas outlet is formed in the upper end of the cylindrical cavity and connected with a gas outlet port, and a multilayer steam-water condensation separation mechanism is arranged in the cylindrical cavity from the gas outlet of the self-sealing valve to the gas outlet in the upper end of the cylindrical.
2. The internal cooling water tank hydrogen leakage monitoring, sampling and cooling device of claim 1, wherein: the multilayer steam-water condensation separation mechanism comprises a plurality of water diversion baffles and connecting rods, each water diversion baffle is provided with a fixing hole, the connecting rods penetrate through the fixing holes of each water diversion baffle and are fixedly connected with the water diversion baffles, and all the water diversion baffles are fixed on the connecting rods to form a whole.
3. The internal cooling water tank hydrogen leakage monitoring, sampling and cooling device of claim 2, wherein: the water distribution baffles are arranged in parallel and are regularly distributed along the direction of the connecting rod, at least one water vapor transmission hole is formed in each layer of water distribution baffle except for the fixing hole, and the water distribution baffles are designed in an inclined mode.
4. The internal cooling water tank hydrogen leakage monitoring, sampling and cooling device of claim 3, wherein: the cylindrical finned radiator is made of aluminum section, Y-shaped radiating fins are distributed on the outer surface, and the root of the Y is connected with the radiator main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821907348.9U CN210071463U (en) | 2018-11-20 | 2018-11-20 | Hydrogen leakage monitoring, sampling and cooling device for internal cold water tank |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821907348.9U CN210071463U (en) | 2018-11-20 | 2018-11-20 | Hydrogen leakage monitoring, sampling and cooling device for internal cold water tank |
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| CN210071463U true CN210071463U (en) | 2020-02-14 |
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| CN201821907348.9U Active CN210071463U (en) | 2018-11-20 | 2018-11-20 | Hydrogen leakage monitoring, sampling and cooling device for internal cold water tank |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113075509A (en) * | 2021-03-30 | 2021-07-06 | 中国大唐集团科学技术研究院有限公司中南电力试验研究院 | Online monitoring device and monitoring method for insulation of water and electricity connector of bar of internal water cooling generator |
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2018
- 2018-11-20 CN CN201821907348.9U patent/CN210071463U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113075509A (en) * | 2021-03-30 | 2021-07-06 | 中国大唐集团科学技术研究院有限公司中南电力试验研究院 | Online monitoring device and monitoring method for insulation of water and electricity connector of bar of internal water cooling generator |
| CN113075509B (en) * | 2021-03-30 | 2024-03-15 | 中国大唐集团科学技术研究院有限公司中南电力试验研究院 | Insulation on-line monitoring device and monitoring method for water-cooled generator bar water-electricity connector |
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