CN220438145U - Optical cavity ring-down insulating gas trace component detection device - Google Patents
Optical cavity ring-down insulating gas trace component detection device Download PDFInfo
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- CN220438145U CN220438145U CN202321198232.3U CN202321198232U CN220438145U CN 220438145 U CN220438145 U CN 220438145U CN 202321198232 U CN202321198232 U CN 202321198232U CN 220438145 U CN220438145 U CN 220438145U
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- 230000003287 optical effect Effects 0.000 title claims abstract description 111
- 238000001514 detection method Methods 0.000 title claims abstract description 45
- 238000005259 measurement Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 101
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 5
- 238000000180 cavity ring-down spectroscopy Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000004847 absorption spectroscopy Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Abstract
The utility model discloses an optical cavity ring-down insulating gas trace component detection device which comprises an optical measurer provided with an optical cavity, a pressure reducing valve, a first electromagnetic valve, a second electromagnetic valve, a vacuum pump, a gas storage tank, an optical cavity detector and a controller, wherein the optical measurer is provided with a gas inlet, a gas outlet and a detection port which are communicated with the outside of the optical cavity, the pressure reducing valve is communicated with the gas inlet, the first electromagnetic valve is arranged on a pipeline between the pressure reducing valve and the gas inlet, the vacuum pump is connected between the gas outlet and the gas storage tank, the second electromagnetic valve is arranged on a pipeline between the vacuum pump and the gas outlet, the optical cavity detector is connected to the detection port, and the controller is electrically connected with the first electromagnetic valve, the second electromagnetic valve and the vacuum pump. The problem that an insulating gas sample of the existing high-voltage electrical equipment is difficult to recycle is solved. All insulating gases in the optical cavity can be pumped into the gas storage tank through the vacuum pump, so that environmental pollution caused by leakage of the insulating gases is avoided.
Description
Technical Field
The utility model relates to the field of gas detection, in particular to an optical cavity ring-down insulating gas trace component detection device.
Background
In the long-term operation process of the high-voltage electrical equipment, defects such as internal particles or foreign residues, poor manufacturing process and the like can cause insulation faults, so that the insulation gas is decomposed, and a large amount of toxic gas decomposition products are generated. The accurate detection of the characteristic decomposition products of the insulating gas realizes the early warning of the insulating fault of the high-voltage electrical equipment, and provides guarantee for the safe operation of the high-voltage electrical equipment.
In the existing high-voltage electrical equipment, insulating gas is used for extracting a gas sample from the high-voltage electrical equipment and then is sent to a laboratory for detection by a special spectrometer, the waiting time is long, insulating gas data cannot be obtained immediately, and therefore the safety of the high-voltage electrical equipment cannot be determined at the first time. Of course, there are also techniques for detecting by cavity ring-down spectroscopy (CRDS), which is a rapid, efficient and accurate trace gas detection technique. Unlike conventional absorption spectroscopy, CRDS technology does not measure absorption directly, but measures the decay time after passing through absorption, is insensitive to the amplitude fluctuation noise of the light source, and has high measurement sensitivity. In addition, the CRDS has the advantages of simple device, easy operation, high measurement speed and the like.
However, the trace component detection device based on the cavity ring-down spectrum has large gas requirement for single detection, at least 10L of continuous ventilation is realized, and the detection accuracy can be realized by more than 90 percent. The insulating gas has poor environmental friendliness, and the insulating gas is extremely difficult to recycle in the inspection process. How to reduce single gas production in the detection process and realize the rapid recovery of the insulating gas is always a difficult problem of detecting trace components of the insulating gas.
Disclosure of Invention
The utility model aims to provide an optical cavity ring-down insulating gas trace component detection device which can effectively solve the problem that an insulating gas sample of existing high-voltage electrical equipment is difficult to recover.
In order to solve the technical problems, the utility model is realized by the following technical scheme:
the utility model provides an optical cavity ring-down insulating gas trace component detection device, includes optical measurement ware, relief pressure valve, first solenoid valve, second solenoid valve, vacuum pump, gas holder, optical cavity detector and the controller that are equipped with the optical cavity, it has the communicating air inlet of messenger's optical cavity and external world, gas outlet and detection mouth to open on the optical measurement ware, the relief pressure valve with the air inlet intercommunication, first solenoid valve sets up the relief pressure valve with on the pipeline between the air inlet, the vacuum pump is connected between gas outlet and gas holder, the second solenoid valve sets up the vacuum pump with on the pipeline between the gas outlet, optical cavity detector connects on the detection mouth, the controller with first solenoid valve, second solenoid valve, vacuum pump electricity are connected.
In the device for quickly calibrating the optical cavity ring-down insulating gas trace component detector, a throttle valve is further arranged on a pipeline between the pressure reducing valve and the first electromagnetic valve.
In the device for rapidly calibrating the optical cavity ring-down insulating gas trace component detector, the flow rate of the insulating gas flowing into the optical cavity is 0.5-2L/min.
In the device for rapidly calibrating the ring-down insulating gas trace component detector of the optical cavity, the gas pressure in the optical cavity is 0.08-0.12MPa.
In the device for quickly calibrating the optical cavity ring-down insulating gas trace component detector, a pressure gauge is further arranged between the second electromagnetic valve and the gas outlet, and the pressure gauge is electrically connected with the controller.
In the device for quickly calibrating the optical cavity ring-down insulating gas trace component detector, the optical measurer is hollow cylindrical, the air inlet is arranged on the lower side wall of the optical measurer, the air outlet is arranged on the upper side wall of the optical measurer, and the detection port is arranged at the top of the optical measurer.
Compared with the prior art, the utility model has the advantages that:
the problem that an insulating gas sample of the existing high-voltage electrical equipment is difficult to recycle is solved through the optical cavity detector and the gas storage tank. The optical measurer with the optical cavity is connected with the electrical equipment, so that insulating gas of the high-voltage electrical equipment can be sampled on site, the insulating gas entering the optical cavity is detected by the optical cavity detection module, after the detection is finished, all the insulating gas in the optical cavity can be pumped into the gas storage tank by the vacuum pump, the recovery of the detection sample gas is completed, and according to the detection result, if the insulating gas is qualified, the insulating gas can be injected back into the high-voltage electrical equipment, and if the insulating gas is unqualified, the environmental pollution caused by the leakage of the insulating gas can be avoided. Because the optical measurer with the optical cavity is adopted for detection on site, quantitative sample gas quantity can be collected according to detection requirements, and waste caused by excessive sample gas quantity collection is avoided.
Further, a throttle valve is further arranged on a pipeline between the pressure reducing valve and the first electromagnetic valve. And a throttle valve is arranged to reduce the speed of the insulating gas in the high-voltage electrical equipment entering the optical cavity, so as to obtain more accurate detection data.
Further, the flow rate of the insulating gas flowing into the optical cavity is 0.5-2L/min. The gas flow in the optical cavity is lower than the speed of 0.5L/min, the speed is too slow, the efficiency is too low, and the speed is higher than 2L/min, so that the optical cavity detector is easy to impact, and the detector is damaged.
In the device for rapidly calibrating the ring-down insulating gas trace component detector of the optical cavity, the gas pressure in the optical cavity is 0.08-0.12MPa. The requirement on sealing connectivity between the optical cavity detector and each component is too high due to the excessive pressure of the gas in the optical cavity, and the test condition cannot be achieved due to the too low pressure.
Further, a pressure gauge is further arranged between the second electromagnetic valve and the air outlet, and the pressure gauge is electrically connected with the controller. The pressure gauge can be used for monitoring the gas pressure in the optical cavity, so that more accurate test data can be obtained.
Further, the optical measurer is hollow cylindrical, the air inlet is arranged on the lower side wall of the optical measurer, the air outlet is arranged on the upper side wall of the optical measurer, and the detection port is arranged at the top of the optical measurer. Let the air inlet keep away from the detection mouth, reduce the impact to the optical cavity detector when gaseous entering optical cavity to set up the gas outlet at the top, to insulating gas's characteristic, be convenient for take insulating gas out the optical cavity fast.
Drawings
FIG. 1 is a schematic diagram of a device for detecting trace components of an optical cavity ring-down insulating gas according to the present utility model.
The reference numerals are:
the device comprises an optical cavity 1, an optical measurer 2, a pressure reducing valve 3, a first electromagnetic valve 4, a second electromagnetic valve 5, a vacuum pump 6, an air storage tank 7, an optical cavity detector 8, a controller 9, an air inlet 10, an air outlet 11, a detection port 12, a throttle valve 13, a pressure gauge 14 and high-voltage electric equipment 15.
Detailed Description
Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element in question 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.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a 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 at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1, an embodiment of a device for detecting trace components of a ring-down insulating gas in an optical cavity 1 according to the present utility model includes an optical measurer 2 provided with the optical cavity 1, a pressure reducing valve 3, a first electromagnetic valve 4, a second electromagnetic valve 5, a vacuum pump 6, a gas storage tank 7, an optical cavity detector 8 and a controller 9. The optical measurer 2 in this embodiment is cylindrical, the optical measurer 2 is provided with an air inlet 10, an air outlet 11 and a detection port 12 which enable the optical cavity 1 to be communicated with the outside, the air inlet 10 is used for being communicated with a high-voltage electrical device 15, insulating gas in the high-voltage electrical device 15 is introduced into the optical cavity 1, a pressure reducing valve 3 and a first electromagnetic valve 4 are sequentially arranged between the air inlet 10 and the high-voltage electrical device 15 according to the gas flowing direction, and the pressure regulating valve is used for reducing the pressure of the insulating gas entering the optical cavity 1 so as to be suitable for measurement standard requirements. The pressure of the insulating gas in the optical cavity 1 is controlled to be 0.08MPa, 0.1MPa or 0.12MPa according to the detection requirement by generally reducing the pressure of the insulating gas entering the optical cavity 1 from 0.3-0.5MPa to 0.08-0.12MPa. And the detection port 12 is connected with the optical cavity detector 8, and the optical cavity detector 8 measures the ring-down time of the insulating gas and calculates the concentration of trace components of the insulating gas. The air outlet 11 is sequentially connected with the second electromagnetic valve 5, the vacuum pump 6 and the air storage tank 7 according to the air flowing direction, and after the detection is finished, the vacuum pump 6 is used for pumping the insulating gas in the optical cavity 1 into the air storage tank 7 for recycling. For automatic operation, the controller 9 is electrically connected to the first solenoid valve 4, the second solenoid valve 5, and the vacuum pump 6, and the operation states of these electrical components can be controlled by the controller 9.
Because the flow rate of the insulating gas entering the optical cavity 1 from the high-voltage electrical equipment 15 is too fast, the test data can be inaccurate, therefore, a throttle valve 13 can be added between the pressure reducing valve 3 and the air inlet 10, the flow rate of the insulating gas entering the optical cavity 1 is controlled, the flow rate of the gas entering the optical cavity 1 is generally controlled to be 0.5-2L/min, and the flow rate of the gas can be 0.5L/min, 1L/min, 1.5L/min or 2L/min and the like according to the size of the optical cavity 1 and the test requirement.
The pressure gauge 14 can be further arranged between the second electromagnetic valve 5 and the air outlet 11, the pressure gauge 14 can be used for detecting the pressure in the optical cavity 1 before testing, so that the vacuum degree in the optical cavity 1 is ensured, the accuracy of detection after the insulating gas enters is ensured, after the detection is finished, whether the insulating gas in the optical cavity 1 is extracted or not can be checked through the pressure gauge 14, the pressure gauge 14 is electrically connected with the controller 9, and the controller 9 judges whether air or the insulating gas exists or not through the pressure in the optical cavity 1 according to the numerical value of the pressure gauge 14, so that the operation of other electrical elements is controlled.
The whole optical measurer 2 is hollow and cylindrical, the hollow part forms an optical cavity 1, an air inlet 10 is arranged on the lower side wall of the optical measurer 2, an air outlet 11 is arranged on the upper side wall of the optical measurer 2, and a detection port 12 is arranged at the top of the optical measurer 2, so that when insulating gas enters the optical cavity 1, the optical measurer 2 can be buffered to avoid direct impact, the safety of the optical measurer 2 is protected, and the air outlet 11 is arranged at the top of the optical measurer 2 to utilize the characteristic of the insulating gas, so that the insulating gas can be pumped out of the optical cavity 1 more rapidly.
During detection, the controller 9 firstly controls the first electromagnetic valve 4 to be closed, the second electromagnetic valve 5 to be opened, and the vacuum pump 6 starts to work, so that air in the optical cavity 1 is pumped out and discharged to the outside. When the internal pressure of the optical cavity 1 is smaller than 10kPa, the controller 9 sends out an instruction, the second electromagnetic valve 5 and the vacuum pump 6 are closed, the first electromagnetic valve 4 is opened, insulating gas in the high-voltage electrical equipment 15 is introduced into the optical cavity 1, the insulating gas enters the optical cavity 1 through the pressure reducing valve, the throttle valve 13 and the first electromagnetic valve 4, the pressure of the insulating gas is reduced to 0.1MPa by the pressure reducing valve 3, the throttle valve 13 is responsible for controlling the flow to be 0.5-2L/min, when the pressure gauge 14 detects that the internal pressure of the optical cavity 1 reaches 0.1MPa, the controller 9 sends out an instruction, the first electromagnetic valve 4 is closed, the optical cavity detector 8 starts working, the insulating gas ring-down time in the optical cavity 1 is detected, and the trace component concentration of the insulating gas is calculated. After the detection of the optical cavity detector 8 is finished, the controller 9 sends out an instruction, the vacuum pump 6 and the second electromagnetic valve 5 are opened, insulating gas in the optical cavity 1 is pumped into the gas storage tank 7 until the internal pressure of the optical cavity 1 is 10kPa, and the vacuum pump 6 and the second electromagnetic valve 5 are closed, so that the gas detection and recovery are completed.
By adopting the detection device, the detection device can be directly connected with the high-voltage electric equipment 15, the direct sampling is performed, the amount of insulating gas is needed, unnecessary sample gas waste is reduced as much as possible, and after the detection is finished, the sample insulating gas is recovered into the gas storage tank 7, so that the leakage of the sample gas is prevented, and the environmental pollution is reduced.
The above embodiments are merely illustrative embodiments of the present utility model, but the technical features of the present utility model are not limited thereto, and any changes or modifications made by those skilled in the art within the scope of the present utility model are included in the scope of the present utility model.
Claims (6)
1. The utility model provides a light chamber ring-down insulating gas trace component detection device, its characterized in that includes optical measurement ware, relief pressure valve, first solenoid valve, second solenoid valve, vacuum pump, gas holder, light chamber detector and the controller that are equipped with the light chamber, it has the communicating air inlet of messenger's light chamber and external world, gas outlet and detection mouth to open on the optical measurement ware, the relief pressure valve with the air inlet intercommunication, first solenoid valve sets up the relief pressure valve with on the pipeline between the air inlet, the vacuum pump is connected between gas outlet and gas holder, the second solenoid valve sets up the vacuum pump with on the pipeline between the gas outlet, the light chamber detector is connected on the detection mouth, the controller with first solenoid valve, second solenoid valve, vacuum pump electricity are connected.
2. The optical cavity ring-down insulating gas trace component detecting apparatus according to claim 1, wherein a throttle valve is further provided on a pipeline between the pressure reducing valve and the first electromagnetic valve.
3. A cavity ring down insulating gas trace component detecting apparatus according to claim 2, wherein a flow rate of insulating gas flowing into said cavity is 0.5-2L/min.
4. The optical cavity ring-down insulating gas trace component detecting apparatus according to claim 1, wherein the gas pressure in said optical cavity is 0.08-0.12MPa.
5. The device for detecting trace components of an optical cavity ring-down insulating gas according to claim 1, wherein a pressure gauge is further arranged between the second electromagnetic valve and the gas outlet, and the pressure gauge is electrically connected with the controller.
6. The optical cavity ring-down insulating gas trace component detecting apparatus according to claim 1, wherein the optical measurer is hollow cylindrical, the gas inlet is provided on a lower side wall of the optical measurer, the gas outlet is provided on an upper side wall of the optical measurer, and the detecting port is provided on a top of the optical measurer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321198232.3U CN220438145U (en) | 2023-05-15 | 2023-05-15 | Optical cavity ring-down insulating gas trace component detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321198232.3U CN220438145U (en) | 2023-05-15 | 2023-05-15 | Optical cavity ring-down insulating gas trace component detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220438145U true CN220438145U (en) | 2024-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321198232.3U Active CN220438145U (en) | 2023-05-15 | 2023-05-15 | Optical cavity ring-down insulating gas trace component detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220438145U (en) |
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2023
- 2023-05-15 CN CN202321198232.3U patent/CN220438145U/en active Active
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