CN217180571U - Oil gas monitoring system - Google Patents
Oil gas monitoring system Download PDFInfo
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- CN217180571U CN217180571U CN202220536536.5U CN202220536536U CN217180571U CN 217180571 U CN217180571 U CN 217180571U CN 202220536536 U CN202220536536 U CN 202220536536U CN 217180571 U CN217180571 U CN 217180571U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 36
- 238000001914 filtration Methods 0.000 claims abstract description 50
- 229930195733 hydrocarbon Natural products 0.000 claims description 16
- 150000002430 hydrocarbons Chemical class 0.000 claims description 15
- 239000004215 Carbon black (E152) Substances 0.000 claims description 12
- 238000004140 cleaning Methods 0.000 claims description 8
- 239000007789 gas Substances 0.000 description 134
- 239000003921 oil Substances 0.000 description 29
- 229910052799 carbon Inorganic materials 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 150000001722 carbon compounds Chemical class 0.000 description 1
- -1 carbon hydrocarbons Chemical class 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000004867 photoacoustic spectroscopy Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The application discloses oil gas monitoring system relates to the technical field of monitoring, and oil gas monitoring system includes: the device comprises an oil-gas separator, a filtering device, a photoacoustic cell, an air pump, a first valve and a second valve. The filtering device is connected with the oil-gas separator; one end of the photoacoustic cell is connected with the filtering device, and the other end of the photoacoustic cell is connected with the air pump; the first valve is connected with the filtering device and the photoacoustic cell; the second valve is connected with the photoacoustic cell and the air pump; when the first valve enables a passage to be formed between the filtering device and the photoacoustic cell and the second valve enables a passage to be formed between the photoacoustic cell and the air pump, the photoacoustic cell can be filled with gas to be detected; when the first valve makes the filter device and the photoacoustic cell be in an open circuit, and the second valve makes the photoacoustic cell and the air pump be in an open circuit, the photoacoustic cell can detect the gas to be detected in the photoacoustic cell. Therefore, the photoacoustic cell can be used for monitoring gas in the transformer, and the interference gas separated from the oil-gas separator is filtered by the filtering device, so that the photoacoustic cell is more accurate to detect.
Description
Technical Field
The utility model relates to a technical field of monitoring particularly, relates to an oil gas monitoring system.
Background
The transformer oil is a mineral oil obtained by distillation and refining of natural petroleum, and is a mixture of pure, stable, low-viscosity, good-insulation and good-cooling liquid natural hydrocarbons obtained by acid-base refining of lubricating oil fractions in the petroleum. The transformer can play roles in heat dissipation and cooling, insulation and insulation maintenance of windings and the like, corona and arc discharge prevention and the like in the running process of the transformer.
The running state of the transformer can be judged through gas precipitated in the transformer oil, and when the parameter is abnormal, the condition indicates that the transformer needs to be repaired or the transformer oil needs to be replaced.
Therefore, how to monitor the gas precipitated in the transformer oil becomes a technical problem which needs to be solved urgently.
SUMMERY OF THE UTILITY MODEL
An object of the application is to provide an oil gas monitoring system, it can monitor the gas that separates out in the transformer oil.
The embodiment of the application discloses oil gas monitoring system includes: an oil-gas separator and an air pump; the filtering device is connected with the oil-gas separator; one end of the photoacoustic cell is connected with the filtering device, and the other end of the photoacoustic cell is connected with the air pump; a first valve connected with the filtering device and the photoacoustic cell; the second valve is connected with the photoacoustic cell and the air pump; when the first valve enables a passage to be formed between the filtering device and the photoacoustic cell and the second valve enables a passage to be formed between the photoacoustic cell and the air pump, the photoacoustic cell can be filled with gas to be detected; when the first valve makes the filter device and the photoacoustic cell be in an open circuit, and the second valve makes the photoacoustic cell and the air pump be in an open circuit, the photoacoustic cell can detect the gas to be detected therein.
In an embodiment, the first valve is a two-position three-way normally-open type reversing valve, an air inlet of the first valve is connected with the filtering device, and a first air outlet of the first valve is connected with the photoacoustic cell.
In an embodiment, the second valve is a two-position three-way normally-open type reversing valve, an air inlet of the second valve is connected with the air pump, and a first air outlet of the second valve is connected with the photoacoustic cell.
In one embodiment, the second air outlet of the first valve is connected to the second air outlet of the second valve.
In one embodiment, the hydrocarbon monitoring system further comprises: a gas storage tank; a third valve connected to the filter device, the first valve and the gas reservoir; and the fourth valve is connected with the second valve, the third valve and the gas storage tank.
In an embodiment, the third valve is a two-position three-normally open type reversing valve, an air inlet of the third valve is connected with the filtering device, and a first air outlet of the third valve is connected with the fourth valve.
In an embodiment, the fourth valve is a two-position three-normally open type directional control valve, the air inlet of the fourth valve is connected to the first valve, and the first air outlet of the fourth valve is connected to the third valve.
In an embodiment, the second air outlet of the third valve is connected to the air storage tank, and the second air outlet of the fourth valve is connected to the air storage tank.
In one embodiment, the hydrocarbon monitoring system further comprises: the fifth valve is connected with the oil-gas separator, the filtering device and the sixth valve; the sixth valve is connected with the second valve, the air pump and the fifth valve; when the third valve enables a passage between the air storage tank and the filtering device, the fifth valve enables a passage between the filtering device and the sixth valve, and the sixth valve enables a passage between the air pump and the fifth valve, the clean air in the air storage tank can be discharged through the air pump by passing through the third valve, the fifth valve and the sixth valve; when the fourth valve makes a passage between the gas storage tank and the first valve, the first valve makes a passage between the photoacoustic cell and the fourth valve, the second valve makes a passage between the photoacoustic cell and the sixth valve, and the sixth valve makes a passage between the second valve and the gas pump, the cleaning gas can be discharged through the gas pump through the fourth valve, the first valve, the photoacoustic cell, the second valve, and the sixth valve.
In one embodiment, the fifth valve and the sixth valve are both two-position three-normally open type reversing valves; the air inlet of the fifth valve is connected with the filtering device, the first air outlet of the fifth valve is connected with the oil-gas separator, and the second air outlet of the fifth valve is connected with the sixth valve; and the air inlet of the sixth valve is connected with the air pump, the first air outlet of the sixth valve is connected with the second valve, and the second air outlet of the sixth valve is connected with the fifth valve.
Therefore, the photoacoustic cell monitoring device can be used for monitoring gas precipitated from transformer oil, and filtering interference gas precipitated from the transformer oil through the filtering device, so that the monitoring result of the photoacoustic cell is more accurate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic diagram of a framework of an oil and gas monitoring system according to an embodiment of the present application;
fig. 2 is a schematic frame diagram of an oil and gas monitoring system according to the second embodiment of the present application.
Icon:
1-an oil and gas monitoring system; 100-oil-gas separator; 110-a filtration device; 120-a photoacoustic cell; 130-an air pump; 131-a first valve; 132-a second valve; 133-a third valve; 134-a fourth valve; 135-a fifth valve; 136-a sixth valve; 140-air storage tank.
Detailed Description
The terms "first," "second," "third," and the like are used for descriptive purposes only and not for purposes of indicating or implying relative importance, and do not denote any order or order.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it should be noted that the terms "inside", "outside", "left", "right", "upper", "lower", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally arranged when products of the application are used, and are used only for convenience in describing the application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application.
In the description of the present application, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.
The technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings.
The first embodiment is as follows:
please refer to fig. 1, which is a schematic diagram of an oil and gas monitoring system 1 according to an embodiment of the present application. In this embodiment, the hydrocarbon monitoring system 1 includes: the device comprises an oil-gas separator 100, a filtering device 110, a photoacoustic cell 120, an air pump 130, a first valve 131 and a second valve 132. Wherein, the filtering device 110 is connected with the oil-gas separator 100; one end of the photoacoustic cell 120 is connected to the filtering device 110, and the other end is connected to the air pump 130; the first valve 131 is connected with the filtering device 110 and the photoacoustic cell 120; a second valve 132 is connected to the photoacoustic cell 120 and the gas pump 130.
When the first valve 131 makes a passage between the filtering device 110 and the photoacoustic cell 120, and the second valve 132 makes a passage between the photoacoustic cell 120 and the air pump 130, the photoacoustic cell 120 can be filled with the gas to be detected; when the first valve 131 opens the circuit between the filtering device 110 and the photoacoustic cell 120, and the second valve 132 opens the circuit between the photoacoustic cell 120 and the air pump 130, the photoacoustic cell 120 can detect the gas to be detected therein.
Therefore, the oil gas monitoring system 1 can detect gas precipitated in the transformer oil to judge the running condition of the transformer. The oil-gas separator is used for separating oil-gas mixture extracted from the transformer. The photoacoustic cell 120 may perform detection of gas in transformer oil by employing photoacoustic spectroscopy.
In addition, since the photoacoustic cell can perform feature detection on the gas precipitated from the gas-oil separator by using the mid-infrared light source technology, a situation that one filter responds to a plurality of feature gases occurs when the filter is selected due to the fact that the infrared absorption spectra of the feature gases have crossed parts. In the present application, the filtering device 110 filters the interfering gas separated out in the oil-gas separator 100, so that the detection of the photoacoustic cell 120 is more accurate.
For example, when the photoacoustic cell includes a probe for detecting CH 4 At the wavelength used, C 2 H 4 、C 2 H 6 、CH 4 、C 3 H 8 、C 4 H 10 The hydrocarbons all respond to the gas, so that the influence caused by the interference gas can be calculated in the calculation process of monitoring, and the error between the calculated parameter and the actual value is larger. When the transformer oil in the transformer with long operation time is degassed in vacuum, the gas to be measured possibly contains C 3 H 8 、C 4 H 10 And high carbon hydrocarbons, which can cause a large error between the measured on-line parameter and the true value. Therefore, in the present application, the filtering device 110 filters the interfering gases such as the carbon three and carbon four compounds precipitated in the oil-gas separator 100, so that the detection of the photoacoustic cell 120 is more accurate.
The filtering device 110 may be a chemical filter that separates hydrocarbons of high carbon species such as carbon three and carbon four compounds without affecting the concentration of the effective gas.
Specifically, the first valve 131 and the second valve 132 are two-position three-way normally-open type reversing valves, the air inlet P of the first valve 131 is connected to the filtering device 110, and the first air outlet a of the first valve 131 is connected to the photoacoustic cell 120. The air inlet P of the second valve 132 is connected to the air pump 130, and the first air outlet a of the second valve 132 is connected to the photoacoustic cell 120. The second air outlet B of the first valve 131 is connected with the second air outlet B of the second valve 132.
In another embodiment, the second outlet B of the first valve 131 is not connected to the second outlet B of the second valve 132. In an operation process, when the first valve 131 is in a state where the air inlet P is communicated with the first air outlet a and the second valve 132 is in a state where the air inlet P is communicated with the first air outlet a, the air pump 130 is turned on, the air pump 130 provides power for air circulation, the air pump 130 pumps the air separated from the oil-gas separator 100, the air separated from the oil-gas separator 100 sequentially passes through the filtering device 110, the first valve 131, the photoacoustic cell 120, the second valve 132 and the air pump 130, and the gas to be detected is filled in the photoacoustic cell 120.
After the pressure in the photoacoustic cell reaches the normal pressure, the air pump is closed, and the gas in the oil-gas separator 100 stops being transmitted to the photoacoustic cell, so that the photoacoustic measurement of the gas to be detected in the photoacoustic cell 120 can be performed.
In another operation process, when the first valve 131 is in a state where the gas inlet P is communicated with the first gas outlet a and the second valve 132 is in a state where the gas inlet P is communicated with the first gas outlet a, the gas pump 130 is turned on, the gas pump 130 provides a power for gas circulation, the gas pump 130 pumps the gas separated from the gas-oil separator 100, the gas separated from the gas-oil separator 100 sequentially passes through the filtering device 110, the first valve 131, the photoacoustic cell 120, the second valve 132 and the gas pump 130, and the gas to be detected is filled into the photoacoustic cell 120.
After the pressure in the photoacoustic cell reaches the normal pressure, the communication state of the first valve 131 and the second valve 132 is switched, so that the first valve 131 is in a state that the gas inlet P is communicated with the second gas outlet B and the second valve 132 is in a state that the gas inlet P is communicated with the second gas outlet B, at this time, the gas in the photoacoustic cell 120 stops flowing, and the photoacoustic measurement of the gas to be detected in the photoacoustic cell 120 is performed.
Example two:
please refer to fig. 2, which is a schematic diagram of a framework of an oil and gas monitoring system 1 according to an embodiment of the present application. The second embodiment differs from the first embodiment in that the oil and gas monitoring system 1 further includes: an air reservoir 140, a third valve 133, a fourth valve 134, a fifth valve 135, and a sixth valve 136. Wherein, the third valve 133 is connected with the filtering device 110, the first valve 131 and the air storage tank 140; the fourth valve 134 is connected with the second valve 132, the third valve 133 and the air storage tank 140; the fifth valve 135 is connected with the oil-gas separator 100 and the filtering device 110; the sixth valve 136 is connected to the second valve 132, the air pump 130, and the fifth valve 135.
When the third valve 133 makes the passage between the filtering device 110 and the gas storage tank 140, and the fourth valve 134 makes the passage between the photoacoustic cell 120 and the gas storage tank 140, the clean gas in the gas storage tank 140 can clean the oil and gas monitoring system 1.
When the fifth valve 135 makes a passage between the filter 110 and the sixth valve 136, and the sixth valve 136 makes a passage between the air pump 130 and the fifth valve 135, the cleaning gas can be discharged through the air pump 130 through the third valve 133, the fifth valve 135 and the sixth valve 136.
Specifically, the third valve 133, the fourth valve 134, the fifth valve 135, and the sixth valve 136 are all two-position three-normally-open type direction valves. The air inlet P of the third valve 133 is connected to the filtering device 110, the first air outlet a of the third valve 133 is connected to the first air outlet a of the fourth valve 134, and the second air outlet B of the third valve 133 is connected to the air storage tank 140.
The gas inlet P of the fourth valve 134 is connected to the gas inlet P of the first valve 131, the first gas outlet a of the fourth valve 134 is connected to the first gas outlet a of the third valve 133, and the second gas outlet B of the fourth valve 134 is connected to the gas tank 140.
The air inlet P of the fifth valve 135 is connected to the filtering device 110, the first air outlet a of the fifth valve 135 is connected to the oil-gas separator 100, and the second air outlet B of the fifth valve 135 is connected to the second air outlet B of the sixth valve 136. The air inlet P of the sixth valve 136 is connected to the air pump 130, the first air outlet a of the sixth valve 136 is connected to the air inlet P of the second valve 132, and the second air outlet B of the sixth valve 136 is connected to the second air outlet B of the fifth valve 135.
Further, after the air pump 130 is turned on, the oil and gas monitoring system 1 provides a power for gas circulation through the air pump 130, the air pump 130 pumps the gas separated from the oil and gas separator 100, and simultaneously, the fifth valve 135 is in a state where the gas inlet P is communicated with the first gas outlet a, the third valve 133 is in a state where the gas inlet P is communicated with the first gas outlet a, the fourth valve 134 is in a state where the gas inlet P is communicated with the first gas outlet a, the first valve 131 is in a state where the gas inlet P is communicated with the first gas outlet a, the second valve 132 is in a state where the gas inlet P is communicated with the first gas outlet a, the sixth valve 136 is in a state where the gas inlet P is communicated with the first gas outlet a, and the gas separated out from the oil and gas separator 100 sequentially passes through the fifth valve 135, the filtering device 110, the third valve 133, the fourth valve 134, the first valve 131, the photoacoustic cell 120, the second valve 132, The sixth valve 136 and the air pump 130 are thus exhausted, and the gas to be detected is now filling the photoacoustic cell 120.
After the pressure in the photoacoustic cell reaches the normal pressure, the air pump can be closed, so that the gas to be detected in the photoacoustic cell 120 can be detected. In one operation, after the gas in the photoacoustic cell is detected, the cleaning operation of the oil gas monitoring system 1 can be performed. The air pump 130 is turned on, the air pump 130 provides the power for air circulation, and the air pump 130 can pump the cleaning gas in the gas storage tank 140. Meanwhile, the third valve 133 is in a state where the gas inlet P is communicated with the second gas outlet B, the fifth valve 135 is in a state where the gas inlet P is communicated with the second gas outlet B, and the sixth valve 136 is in a state where the gas inlet P is communicated with the second gas outlet B, the clean gas in the gas storage tank 140 sequentially passes through the third valve 133, the filtering device 110, the fifth valve 135, the sixth valve 136 and the gas pump 130, and the clean gas can clean the filtering device 110 and corresponding pipelines.
After the cleaning of the filtering apparatus 110 is completed, the corresponding valves are switched, so that the fourth valve 134 is in a state where the gas inlet P is communicated with the second gas outlet B, the first valve 131 is in a state where the gas inlet P is communicated with the first gas outlet a, the second valve 132 is in a state where the gas inlet P is communicated with the first gas outlet a, and the sixth valve 136 is in a state where the gas inlet P is communicated with the first gas outlet a, the cleaning gas in the gas storage tank 140 can be discharged through the gas pump 130 sequentially through the fourth valve 134, the first valve 131, the photoacoustic cell 120, the second valve 132, and the sixth valve 136, and the cleaning gas can clean the photoacoustic cell 120 and the corresponding pipelines.
It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. An oil and gas monitoring system, comprising:
an oil-gas separator;
an air pump;
the filtering device is connected with the oil-gas separator;
one end of the photoacoustic cell is connected with the filtering device, and the other end of the photoacoustic cell is connected with the air pump;
a first valve connected with the filtering device and the photoacoustic cell; and the number of the first and second groups,
the second valve is connected with the photoacoustic cell and the air pump;
when a passage is formed between the filtering device and the photoacoustic cell and a passage is formed between the photoacoustic cell and the air pump, the photoacoustic cell can be filled with gas to be detected;
when the filtering device and the photoacoustic cell are in an open circuit, and the photoacoustic cell and the air pump are in an open circuit, the photoacoustic cell can detect the gas to be detected in the photoacoustic cell.
2. The hydrocarbon monitoring system of claim 1, wherein the first valve is a two-position, three-way, normally open reversing valve, the inlet of the first valve is connected to the filtering device, and the first outlet of the first valve is connected to the photoacoustic cell.
3. The hydrocarbon monitoring system of claim 2, wherein the second valve is a two-position three-way normally open reversing valve, an air inlet of the second valve is connected to the air pump, and a first air outlet of the second valve is connected to the photoacoustic cell.
4. The hydrocarbon monitoring system of claim 3, wherein the second outlet port of the first valve is connected to the second outlet port of the second valve.
5. The hydrocarbon monitoring system of claim 1, further comprising:
a gas storage tank;
a third valve connected to the filter device, the first valve and the gas reservoir;
and the fourth valve is connected with the second valve, the third valve and the gas storage tank.
6. The hydrocarbon monitoring system of claim 5, wherein the third valve is a two-position three normally open type directional valve, the third valve inlet port being connected to the filter device and the third valve outlet port being connected to the fourth valve.
7. The hydrocarbon monitoring system of claim 6, wherein the fourth valve is a two-position three normally-open type directional valve, the inlet port of the fourth valve being connected to the first valve, and the first outlet port of the fourth valve being connected to the third valve.
8. The hydrocarbon monitoring system of claim 7, wherein the second outlet port of the third valve is connected to the reservoir and the second outlet port of the fourth valve is connected to the reservoir.
9. The hydrocarbon monitoring system of claim 5, further comprising:
the fifth valve is connected with the oil-gas separator, the filtering device and the sixth valve;
the sixth valve is connected with the second valve, the air pump and the fifth valve;
when the third valve enables a passage between the air storage tank and the filtering device, the fifth valve enables a passage between the filtering device and the sixth valve, and the sixth valve enables a passage between the air pump and the fifth valve, the clean air in the air storage tank can be discharged through the air pump by passing through the third valve, the fifth valve and the sixth valve;
when the fourth valve makes a passage between the gas storage tank and the first valve, the first valve makes a passage between the photoacoustic cell and the fourth valve, the second valve makes a passage between the photoacoustic cell and the sixth valve, and the sixth valve makes a passage between the second valve and the gas pump, the cleaning gas can be discharged through the gas pump through the fourth valve, the first valve, the photoacoustic cell, the second valve, and the sixth valve.
10. The hydrocarbon monitoring system of claim 9,
the fifth valve and the sixth valve are both two-position three-normally open type reversing valves;
the air inlet of the fifth valve is connected with the filtering device, the first air outlet of the fifth valve is connected with the oil-gas separator, and the second air outlet of the fifth valve is connected with the sixth valve;
and the air inlet of the sixth valve is connected with the air pump, the first air outlet of the sixth valve is connected with the second valve, and the second air outlet of the sixth valve is connected with the fifth valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220536536.5U CN217180571U (en) | 2022-03-11 | 2022-03-11 | Oil gas monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220536536.5U CN217180571U (en) | 2022-03-11 | 2022-03-11 | Oil gas monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217180571U true CN217180571U (en) | 2022-08-12 |
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ID=82744734
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220536536.5U Active CN217180571U (en) | 2022-03-11 | 2022-03-11 | Oil gas monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217180571U (en) |
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2022
- 2022-03-11 CN CN202220536536.5U patent/CN217180571U/en active Active
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