CN219996428U - Leak detector of vacuum system - Google Patents
Leak detector of vacuum system Download PDFInfo
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- CN219996428U CN219996428U CN202222284534.4U CN202222284534U CN219996428U CN 219996428 U CN219996428 U CN 219996428U CN 202222284534 U CN202222284534 U CN 202222284534U CN 219996428 U CN219996428 U CN 219996428U
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- cold air
- vacuum system
- air outlet
- processor
- leak detector
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- 238000001514 detection method Methods 0.000 claims abstract description 53
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 238000001931 thermography Methods 0.000 claims abstract description 18
- 238000005057 refrigeration Methods 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000001307 helium Substances 0.000 description 6
- 229910052734 helium Inorganic materials 0.000 description 6
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 6
- 238000001816 cooling Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 238000004949 mass spectrometry Methods 0.000 description 2
- 238000001819 mass spectrum Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000003331 infrared imaging Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000008542 thermal sensitivity Effects 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- Examining Or Testing Airtightness (AREA)
Abstract
The utility model relates to the technical field of leakage detection of a steam turbine vacuum system of a power plant, and discloses a vacuum system leakage detector which comprises a refrigerating device, wherein a cold air outlet is formed in the refrigerating device, and the refrigerating device is used for generating cold air; one end of the cold air pipe is connected with the cold air outlet; the detection mechanism is connected with one end, far away from the refrigerating device, of the cold air pipe and is used for transmitting and diffusing the cold air; the thermal imaging device is connected with the detection mechanism and is used for detecting the flow direction of cold air in the detection mechanism to form an air flow image; and the processor is electrically connected with the refrigerating device and the thermal imaging device and is used for carrying out data processing on the air flow image. The method reduces the start-stop loss of the unit, saves the detection cost, ensures the personal safety of detection personnel, and is convenient, quick and accurate in leak detection.
Description
Technical Field
The utility model relates to the technical field of leakage detection of a steam turbine vacuum system of a power plant, in particular to a vacuum system leakage detector.
Background
The vacuum is formed in the condenser because the exhaust steam of the steam turbine is cooled into condensed water, and the specific volume of the condensed water is rapidly reduced. When the exhaust steam is condensed into water, the volume is greatly reduced, so that the steam side of the condenser forms high vacuum. The vacuum system of the power plant is mainly a water ring type mechanical vacuum pump, a certain vacuum is established when a cylinder and a condenser unit are started, the unit normally operates to remove non-condensable gas in a steam turbine vacuum system, and the vacuum of the condenser is maintained. Vacuum leakage of a condenser of a power plant mainly occurs at a copper pipe and a flange, the efficiency of a turbine unit can be reduced due to leakage of a vacuum system, the power supply coal consumption is increased, safe operation of a turbine can be threatened, the dissolved oxygen of condensed water can be increased due to vacuum leakage of the condenser, and oxygen corrosion of low-pressure equipment is caused.
The existing vacuum system leakage detection methods mainly comprise a water filling leakage detection method, a helium mass spectrum leakage detection method, an ultrasonic leakage detection method, a flame method, a soap bubble smearing method, a halogen detection method and the like. (1) In the traditional operation, a flame detection method and a soap bubble smearing method are used, and a halogen detection method is complex and has poor effect. (2) The method of leak detection by filling water is a method used in most current cases, the method is more visual, leak points are very easy to find, and the defect is that the height of the filled water can only reach the lowest shaft seal depression of a cylinder due to equipment, and the position higher than the shaft seal depression is difficult to find because the water is not going on, in particular to a pipeline system connected with a steam turbine cylinder. (3) Helium mass spectrometry is typically performed by spraying helium at a suspicious site and then detecting the presence of helium at the vacuum pump end, which indicates that the suspicious site has leaked, and which is capable of determining the general location of the leak and has a relative value data. However, the equipment is laborious to use and requires multiple people to operate; helium mass spectrometry is greatly affected by the environment, and moderate air fluidity causes trouble in determining leakage points; in addition, helium mass spectrum is used on the air cooling island, so that the leakage detection difficulty is high, and the leakage point is basically difficult to determine at the position with more pipelines. (4) The ultrasonic leak detection method is a convenient and quick method, and is simple to operate at first and can be operated by one person; moreover, the position of the leakage point can be accurately determined, so that the leakage is convenient, and the defect that a certain operation experience is needed during use is overcome. The above detection means have advantages and disadvantages, but are limited in use, and cannot easily detect leakage.
At present, how to improve the convenience of leak detection is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In some embodiments of the utility model, a leak detector for a vacuum system is provided, which comprises a refrigeration device, wherein a cold air outlet is formed in the refrigeration device, the refrigeration device is used for generating cold air, a cold air pipe, a detection mechanism, a thermal imaging device and a processor, and the problem of inconvenient vacuum leak detection is solved.
In some embodiments of the present utility model, the structure of the refrigeration device is improved, the refrigeration device comprises a refrigeration sheet, a heat radiation sheet and a blower, the blower is used for flowing cold air out of the cold air outlet, an air flow passage is formed between the cold air outlet and the cold air pipe, and a sealing and fixing device is arranged at the joint of the cold air outlet and the cold air pipe.
In some embodiments of the utility model, a detection mechanism is improved, the detection mechanism is a handheld hollow metal rod, the handheld hollow metal rod is provided with a conical nozzle at the tail end, and the conical nozzle is used for diffusing the cold air.
The utility model provides a leak detector of a vacuum system, comprising:
the refrigerating device is provided with a cold air outlet and is used for generating cold air;
one end of the cold air pipe is connected with the cold air outlet;
the detection mechanism is connected with one end, far away from the refrigerating device, of the cold air pipe and is used for transmitting and diffusing the cold air;
the thermal imaging device is connected with the detection mechanism and is used for detecting the flow direction of cold air in the detection mechanism to form an air flow image;
and the processor is electrically connected with the refrigerating device and the thermal imaging device and is used for carrying out data processing on the air flow image.
In some embodiments of the utility model, the refrigeration device includes a refrigeration fin, a heat sink, and a blower for flowing cool air out of the cool air outlet.
In some embodiments of the present utility model, an air flow channel is formed between the cold air outlet and the cold air pipe, and a sealing and fixing device is arranged at the joint of the cold air outlet and the cold air pipe.
In some embodiments of the utility model, the detection mechanism is a hand-held hollow metal rod terminating in a conical nozzle for diffusing the cold air.
In some embodiments of the utility model, the vacuum system leakage instrument further comprises:
the display is electrically connected to the processor and is used for displaying the vacuum leakage position image processed by the processor;
the alarm is electrically connected to the processor and used for alarming when the processor finds leakage.
In some embodiments of the utility model, the vacuum system leak detector further comprises:
the rechargeable battery pack is electrically connected with the refrigerating device, the thermal imaging device, the processor, the display and the alarm.
In some embodiments of the present utility model, an internal thread is provided in the cold air outlet, an external thread matching with the internal thread is provided on one end of the cold air pipe connected to the cold air outlet, and the cold air pipe is in threaded connection with the cold air outlet.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model has strong environmental adaptability, and particularly aims at that in a space where high temperature and pipelines are densely distributed in a unit, workers can not check leakage near the flange edge, so that the utility model can be used for effectively and conveniently checking, and the nozzle at the tail end of the detection unit can be moved along the pipeline or the flange, and when the detection unit moves to a leakage place, the leakage part is determined by the thermal imaging of the induction unit according to the flowing direction of cold air and the difference between the cold air and the environmental temperature. The utility model can detect the leakage point of the vacuum system, the unit can be used in a normal operation state without stopping and load change, the start-stop loss of the unit is reduced, the detection cost is saved, and the personal safety of detection personnel is ensured, and the leakage detection is convenient, quick and accurate.
Drawings
FIG. 1 is a schematic diagram of a leak detector of a vacuum system in accordance with an embodiment of the utility model;
fig. 2 is a schematic diagram of a leak detector of a particular vacuum system in accordance with another embodiment of the utility model.
In the drawing the view of the figure,
1. a thermal imaging device; 2. a display; 3. a processor; 4. an alarm; 5. a refrigerating device; 6. a cold air pipe; 7. and a detection mechanism.
Detailed Description
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The utility model provides a leak detector of a vacuum system, comprising:
the refrigerating device 5 is provided with a cold air outlet, and the refrigerating device 5 is used for generating cold air;
a cold air pipe 6, wherein one end of the cold air pipe 6 is connected with the cold air outlet; the size of the cool air outlet 10 is 10MM. The size of the aperture influences the sensitivity of detection, and the condition of missing detection can appear when the aperture is too small, and the position of leaking is not well confirmed when the aperture is too large. The aperture can be adjusted adaptively according to the actual situation.
The detection mechanism 7 is connected with one end, far away from the refrigerating device 5, of the cold air pipe 6, and the detection mechanism 7 is used for conveying and diffusing the cold air; the cold air pipe 6 is a telescopic air pipe.
A thermal imaging device 1 connected with the detection mechanism 7, wherein the thermal imaging device 1 is used for detecting the flow direction of cold air in the detection mechanism 7, sensing a temperature field of a detection area and forming an image to form an air flow image;
the processor 3 is electrically connected with the refrigerating device 5 and the thermal imaging device 1, and the processor 3 is used for carrying out data processing on the air flow image.
In some embodiments of the present utility model, the cooling device 5 includes a cooling fin, a heat sink, and a blower for discharging cool air from the cool air outlet.
In this embodiment, the semiconductor refrigeration device 5 includes a TEC semiconductor refrigeration sheet, a heat sink, and a blower fan, through which cool air flows out from a cool air outlet.
In some embodiments of the present utility model, an air flow channel is formed between the cold air outlet and the cold air pipe 6, and a sealing and fixing device is disposed at the connection position of the cold air outlet and the cold air pipe 6.
In some embodiments of the present utility model, the detecting means 7 is a hand-held hollow metal rod, and the end of the hand-held hollow metal rod is a conical nozzle, and the conical nozzle is used for diffusing the cold air.
In some embodiments of the utility model, the vacuum system leakage instrument further comprises:
the display 2 is electrically connected to the processor 3, and the display 2 is used for displaying the vacuum leakage position image processed by the processor;
the alarm 4 is electrically connected to the processor 3, and the alarm 4 is used for alarming when the processor 3 finds leakage.
In some embodiments of the utility model, the vacuum system leak detector further comprises:
the rechargeable battery pack is electrically connected with the refrigerating device 5, the thermal imaging device 1, the processor 3, the display 2 and the alarm 4.
In some embodiments of the present utility model, an internal thread is provided in the cold air outlet, an external thread matching with the internal thread is provided on the end of the cold air pipe 6 connected to the cold air outlet, and the cold air pipe 6 is in threaded connection with the cold air outlet. The cold air pipes 6 with different lengths can be replaced according to the detected requirements, and the disassembly and the assembly are convenient.
The working principle of the utility model is as follows: aiming at the situation that a worker cannot check leakage near the flange in a space where the unit is high-temperature and pipelines are densely distributed, the utility model can be used for effectively and conveniently checking, the detection mechanism 7 is moved along the pipelines or the flanges, when the detection mechanism moves to a leakage place, the thermal imaging device 1 detects the air image flowing direction according to the principle of high-low pressure air flowing, the image data of the processor 3 is processed and then the image of the vacuum leakage part is displayed through the display 2, and the alarm 4 is used for alarming to inform the worker to repair.
For ease of understanding, the utility model is presented in the following detailed description or apparatus:
as shown in FIG. 2, the thermal imaging device 1 selects uncooled vanadium oxide infrared focal plane micro-heat type, the pixels are 320 multiplied by 240, the wavelength range is 8-14 UM, the thermal sensitivity is less than or equal to 0.6 ℃ and 30 ℃, the frame frequency is 25HZ, and the spatial resolution is 4.4MRAD. The processor 3 adopts an STM32F407 singlechip, a kernel CONTEX-M4 and a CPU with the highest frequency of 168MHz and FPU. The display 2 is a 3.5 inch LCD display 2 with a resolution of 640 x 480. The alarm 4 is an electromagnetic buzzer. The rechargeable battery pack is a rechargeable lithium battery pack 15.
The thermal imaging device 1 further comprises an infrared imaging sensor 11, a signal processor 12, a key circuit 14, an RS485 communication module 17 and a DCS system 18.
It should be noted that the specific device model may be adjusted or changed according to actual requirements.
According to a first concept of the present utility model, as the structure of the refrigerating apparatus 5 is improved, the refrigerating apparatus 5 includes a refrigerating fin, a heat radiating fin, and a blower for flowing out cool air from the cool air outlet, an air flow passage is formed between the cool air outlet and the cool air duct 6, and a sealing and fixing device is provided at a junction of the cool air outlet and the cool air duct 6. The cold air can be effectively transmitted, detection is convenient, and detection precision is improved.
According to a second concept of the utility model, the detection means 7 are improved in that the detection means 7 are hand-held hollow metal rods ending in conical nozzles for diffusing the cold air. The pipeline or leakage position detection device can flexibly and conveniently detect the movement of the pipeline or the leakage position, and the detection accuracy is improved.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.
Claims (7)
1. A vacuum system leak detector, comprising:
the refrigerating device is provided with a cold air outlet and is used for generating cold air;
one end of the cold air pipe is connected with the cold air outlet;
the detection mechanism is connected with one end, far away from the refrigerating device, of the cold air pipe and is used for transmitting and diffusing the cold air;
the thermal imaging device is connected with the detection mechanism and is used for detecting the flow direction of cold air in the detection mechanism to form an air flow image;
and the processor is electrically connected with the refrigerating device and the thermal imaging device and is used for carrying out data processing on the air flow image.
2. A vacuum system leak detector as defined in claim 1, wherein the refrigeration means comprises a refrigeration fin, a heat sink and a blower for flowing cool air out of the cool air outlet.
3. A vacuum system leak detector as defined in claim 1, wherein an air flow path is formed between the cold air outlet and the cold air pipe, and a sealing and fixing device is provided at the junction of the cold air outlet and the cold air pipe.
4. A vacuum system leak detector as defined in claim 3, wherein the detection mechanism is a hand-held hollow metal rod terminating in a conical nozzle for diffusing the cold air.
5. A vacuum system leak detector as defined in any one of claims 1-4, further comprising:
the display is electrically connected to the processor and is used for displaying the vacuum leakage position image processed by the processor;
the alarm is electrically connected to the processor and used for alarming when the processor finds leakage.
6. A vacuum system leak detector as defined in claim 5, further comprising:
the rechargeable battery pack is electrically connected with the refrigerating device, the thermal imaging device, the processor, the display and the alarm.
7. A vacuum system leak detector as defined in claim 1, wherein the cold air outlet is internally threaded, and wherein the cold air pipe is provided with external threads matching the internal threads at the end thereof connected to the cold air outlet, and wherein the cold air pipe is threadedly connected to the cold air outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222284534.4U CN219996428U (en) | 2022-08-29 | 2022-08-29 | Leak detector of vacuum system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222284534.4U CN219996428U (en) | 2022-08-29 | 2022-08-29 | Leak detector of vacuum system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219996428U true CN219996428U (en) | 2023-11-10 |
Family
ID=88608892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222284534.4U Active CN219996428U (en) | 2022-08-29 | 2022-08-29 | Leak detector of vacuum system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219996428U (en) |
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2022
- 2022-08-29 CN CN202222284534.4U patent/CN219996428U/en active Active
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