CN110873770A - Self-service gas-carrying system for oil chromatography on-line monitoring device - Google Patents
Self-service gas-carrying system for oil chromatography on-line monitoring device Download PDFInfo
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- CN110873770A CN110873770A CN201911160261.9A CN201911160261A CN110873770A CN 110873770 A CN110873770 A CN 110873770A CN 201911160261 A CN201911160261 A CN 201911160261A CN 110873770 A CN110873770 A CN 110873770A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/32—Control of physical parameters of the fluid carrier of pressure or speed
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/32—Control of physical parameters of the fluid carrier of pressure or speed
- G01N2030/326—Control of physical parameters of the fluid carrier of pressure or speed pumps
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/32—Control of physical parameters of the fluid carrier of pressure or speed
- G01N2030/328—Control of physical parameters of the fluid carrier of pressure or speed valves, e.g. check valves of pumps
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention relates to a self-service gas-carrying system for an oil chromatography online monitoring device, which comprises an oil-free air pump (1), a one-way valve (2), a pressure controller (3) and a gas storage filter mechanism, wherein the interface end of an air outlet (12) of the oil-free air pump (1) is connected with the one-way valve (2) through a gas pipeline, the other end of the one-way valve (2) is connected with the gas storage filter mechanism through a gas pipeline, the pressure controller (3) is arranged on the gas pipelines of the one-way valve (2) and the gas storage filter mechanism, the pressure controller (3) is connected with the oil-free air pump (1) through a pressure switch (7), and the gas storage filter mechanism comprises a gas storage tank (4) and a gas filter device (5) connected with the gas. Compared with the prior art, the invention has the advantages of automatic control, cost saving, strong functionality and the like.
Description
Technical Field
The invention relates to the field of on-line monitoring and maintenance of oil chromatography of a transformer substation, in particular to a self-service gas-carrying system for an on-line monitoring device of the oil chromatography.
Background
The oil chromatogram on-line monitoring device is used for monitoring trace fault gas in oil of the oil-immersed power equipment, analyzing captured trace gas signals, forecasting equipment fault hidden dangers in advance, avoiding sudden accidents and improving the operation safety and reliability of power facilities. The carrier gas is used as a mobile phase in the on-line monitoring and gas chromatography analysis of the oil chromatogram, and directly influences the separation efficiency of a gas chromatographic column, the sensitivity of a gas detector and the stability of the analysis of equipment operation data, so that a carrier gas system is a very important component of the on-line monitoring device of the oil chromatogram. The former carrier gas system consists of an external gas collecting cylinder and a pressure control valve, and the gases are high-purity inert gases such as nitrogen and argon. One of the disadvantages of this solution is that the plant is expensive to operate; secondly, along with the gradual consumption of the carrier gas, people are required to go to the site for replacement at regular intervals, so that the workload of operation and maintenance personnel of the transformer substation is increased, and meanwhile, the hidden trouble of equipment operation failure caused by site construction exists in the engineering; thirdly, the continuity of the operation of the equipment is influenced, and the equipment stops working due to the replacement of the carrier gas, so that the continuous data analysis and the real-time online monitoring of the primary equipment transformer are not facilitated.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a self-service gas-carrying system for an oil chromatography online monitoring device.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a self-service carrier gas system for oil chromatogram on-line monitoring device, includes no oil air pump, check valve, pressure controller and gas storage filter mechanism, no oil air pump be equipped with air inlet and gas outlet, the interface end of the gas outlet of no oil air pump pass through gas piping connection check valve, the other end of check valve pass through gas piping connection gas storage filter mechanism, be equipped with pressure controller on the gas piping of check valve and gas storage filter mechanism, pressure controller passes through pressure switch and connects no oil air pump, gas storage filter mechanism include the gas holder and with gas tank connection's gas filter device.
Preferably, the air storage tank comprises a tank body, an input port, a first output port for outputting power compressed air and a second output port for connecting with a gas filter device.
Preferably, the gas filter device comprises a large flow filter for filtering particles and a gas purification tube bank for filtering characteristic gas, wherein one end of the large flow filter is connected with the second output port of the gas storage tank, and the other end of the large flow filter is connected with the gas purification tube bank.
Preferably, the bottom of the air storage tank is connected with a drain valve.
Preferably, the oil-free air pump is connected with an oil-free swinging piston type compressor.
Preferably, the applicable pressure value of the check valve is in the range of 0.05-1 MPa.
Preferably, the gas purification tube group comprises four gas purification tubes connected in sequence.
Preferably, the water discharge valve is connected with a time relay or a programmable time controller.
The system of the invention has the following working procedures:
1) the pressure controller is preset with a high pressure value and a low pressure value.
2) The natural air gets into not oily air pump by the air inlet of not having the oil air pump, it compresses natural air to not have the oil air pump, and through check valve with gaseous uniflow to in the gas holder, the volume that the air was stored is controlled by pressure controller, when the pressure value that pressure controller detected reached the high pressure value of settlement, pressure controller control pressure switch disconnection, and then control does not have oil air pump stop work, when the pressure value that pressure controller detected is less than the low pressure value of settlement, the gaseous uniflow that the check valve control did not have the oil air pump derivation, pressure switch automatic coupling, it begins to start to have the oil air pump. The drain valve is controlled by a time relay or a time program to drain water and remove impurities in the gas storage tank at regular time.
3) After the water is drained and the impurities are removed, the gas filled in the gas storage tank is subjected to particle filtration, drying treatment and characteristic gas filtration through a gas filter device, and high-purity air is output.
Compared with the prior art, the invention has the following advantages:
1) the self-service gas carrier system compresses natural air obtained by the oil-free gas pump, and completes the storage and filtration of the air through the gas storage filter mechanism, the obtained air has high purity and the same effect as the externally purchased high-purity nitrogen, and compared with the traditional gas carrier system consisting of an externally-collected gas cylinder and a pressure control valve, the self-service gas carrier system has the advantages of simple structure and low cost;
2) the oil-free air pump compresses natural air, the compressed natural air is filled and stored in the air storage tank through the one-way valve, the air storage amount is controlled by the pressure controller, when the pressure value detected by the pressure controller reaches a set high-pressure value, the pressure controller controls the pressure switch to be disconnected, the oil-free air pump is further controlled to stop working, when the pressure value detected by the pressure controller is lower than a set low-pressure value, the pressure switch is automatically connected, the oil-free air pump starts to be started, safe, automatic and efficient starting and stopping control can be achieved, and the workload of transformer substation operation and maintenance personnel is greatly reduced;
3) the gas storage tank of the gas storage filter mechanism is provided with a first output port for outputting power compressed air, the output power compressed air can provide power for the actions of a piston type cylinder and an oil cylinder of the oil chromatography online monitoring device, the gas storage tank is also provided with a second output port, and the port is connected with a gas filter device, can be used for generating high-purity air and is used as carrier gas, and has simple structure and strong functionality;
4) the self-service carrier gas system controls the start or stop of the oil-free air pump through the pressure controller, and always changes the pressure value of the carrier gas within a set range, so that the natural air is compressed, purified and dried, the generated high-purity air is used as the carrier gas, and the original gas (natural air) is inexhaustible, so that the demand supply of the carrier gas during the continuous operation of the oil chromatography on-line monitoring device is ensured;
5) the bottom of the gas storage tank is connected with a drain valve, the drain valve is controlled by a time relay or a time program, and the gas storage tank can be drained and decontaminated at regular time;
6) the invention is provided with the one-way valve for butting the interface end of the oil-free air pump, can control the one-way flow of air, discharges the pressure in time, reduces the air resistance when the oil-free air pump is started, and ensures that the oil-free air pump can be started in time when the pressure switch is connected.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention in an embodiment;
FIG. 2 is a schematic block diagram of the system of the present invention in an embodiment;
FIG. 3 is a schematic diagram of the gas storage filter mechanism of the system of the present invention in an embodiment;
FIG. 4 is a diagram illustrating the interface of the gas storage filter mechanism of the system of the present invention;
the reference numbers in the figures indicate:
1. the device comprises an oil-free air pump, 2, a one-way valve, 3, a pressure controller, 4, a gas storage tank, 5, a gas filter device, 6, a drain valve, 7, a pressure switch, 8, a large-flow filter, 9, a gas purification pipe group, 11, an air inlet, 12, an air outlet, 41, an input port, 42, a first output port, 43 and a second output port.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
The invention relates to a self-service gas-carrying system for an oil chromatography on-line monitoring device. The normal air component is nitrogen (N) in volume fraction2) About 78% of oxygen (O)2) About 21%, rare gas about 0.94%, carbon dioxide (CO)2) About 0.03%, and other gases and impurities about 0.03%. The characteristic gas refers to a small amount of gas to be detected of the transformer oil chromatographic on-line monitoring device in the air, such as CO2、H2CO, and steam H2O、CH4、C2H4、C2H6、C2H2And the like. The self-service carrier gas system can remove impurities and characteristic gases in the air, and the filtered air can be applied to carrier gas of the transformer oil chromatography online monitoring device.
A self-service gas carrying system for an oil chromatography on-line monitoring device is shown in figure 1 and comprises an oil-free air pump 1, a one-way valve 2, a pressure controller 3, a gas storage filter mechanism and a drain valve 6. The gas outlet 12 of the oil-free gas pump 1 is connected with the one-way valve 2, and the one-way valve 2 is respectively connected with the pressure controller 3 and the gas storage filter mechanism through gas pipelines.
The gas storage filter mechanism comprises a gas storage tank 4 and a gas filter device 5. The gas storage tank 4 is connected with a drain valve 6 and a gas filter device 5. The pressure controller 4 is connected with the oil-free air pump 1 through a pressure switch 7.
The natural air gets into no oily air pump 1 by the air inlet 11 of no oily air pump 1, and no oily air pump 1 compresses the natural air to fill out through check valve 2 and store in gas holder 4, the volume that the air was stored is controlled by pressure controller 3, and when the pressure value that pressure controller 3 detected reached the high pressure value of settlement, pressure controller 3 control pressure switch 7 disconnection, and then control no oily air pump 1 stop work. When the pressure value detected by the pressure controller 3 is lower than the set low pressure value, the pressure switch 7 is automatically connected, and the oil-free air pump 1 starts to be started.
The gas tank 4 of this embodiment is a 1L gas tank. The 1L gas storage tank has 1 input port and 2 output ports. The input port 41 is connected to a gas pipe that is accessed by the oil-free gas pump 1. The first output port 42 outputs power compressed air to provide power for the actions of a piston type cylinder and an oil cylinder of the oil chromatography online monitoring device. The second outlet 43 is connected to a gas filter device 5 for generating high purity air for use as a carrier gas. The bottom of the gas storage tank 4 is connected with a drain valve 6, the drain valve 6 is controlled by a time relay or a time program, and the gas storage tank 4 is drained and purified at regular time.
The one-way valve 2 is in butt joint with the interface end of the oil-free air pump 1, and has the effects of controlling the one-way flow of air and timely venting the air pressure, so that the air resistance of the oil-free air pump 1 during starting is reduced, and the oil-free air pump 1 can be started in time when the pressure switch 7 is connected. Preferably, the one-way valve 2 of the present embodiment has a pressure value in the range of 0.05-1MPa, and functions as a check for gas. In actual gas circuit use, the gas inlet end should be emptied in time to reduce the air resistance when the gas pump starts.
The oil-free air pump 1 of the embodiment adopts an oil-free swing piston type compressor as a power source and can provide a stable oil-free air source. The device has the advantages of low noise, clean and dry air source, stable operation, long service life and the like, can continuously work for a long time, and is matched with the pressure controller 3 to realize full-automatic control.
The gas filter device 5 of the present embodiment mainly comprises a large flow filter 8 and a gas purification tube set 9, wherein one end of the large flow filter 8 is connected to the second output port 43 of the gas storage tank 4, and the other end is connected to the gas purification tube set 9. The main function of the gas filter device 5 is to filter, purify, dry and remove characteristic gases from natural air. The characteristic gas is 7 kinds of gas to be detected by the oil chromatogram on-line monitoring device, and the gas is hydrogen, carbon monoxide, carbon dioxide, methane, ethane, ethylene and acetylene. The method is used for filtering characteristic gas contained in natural air and preventing the characteristic gas contained in the air from interfering the content of the characteristic gas detected in the transformer oil by an oil chromatography on-line monitoring device. Preferably, the gas purification tube group 9 is provided with four gas purification tubes connected in sequence, and the four gas purification tubes are respectively used for removing water, hydrocarbon, hydrogen, carbon monoxide and carbon dioxide. The large-flow filter 8 can remove particles of 0.01 micron and above 100%; the oil mist can be effectively and continuously removed by more than 99.99 percent, and the concentration of the oil mist is controlled to be less than 0.01 ppm; in addition, the filter has large filtering area, stable performance, small pressure loss and convenient filter element replacement; the pressure difference indicating device is arranged, automatic pollution discharge can be realized, and the service life is long.
In order to verify the effectiveness of the self-service carrier gas system, two oil chromatography online monitoring devices are selected for experiments, wherein the equipment 1 adopts externally purchased high-purity nitrogen (99.999%) as carrier gas, and the equipment 2 adopts high-purity air output by the self-service carrier gas system as carrier gas. 2 sets the same time every day to carry out online data analysis on the same oil sample for 12 days continuously, and the data comparison result is as follows:
TABLE 1 comparison of data
As can be seen from the data comparison in table 1, the stability and relative accuracy of the sampling data of the same oil sample in the current day of the equipment 1 and the equipment 2 can indicate that the high-purity air provided by the self-service carrier gas system can achieve the same effect as the external purchase of high-purity nitrogen gas within an allowable range. The self-service gas-carrying system has an efficient air impurity removal function, and is favorable for replacing externally purchased high-purity air in the oil chromatography online monitoring device.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and those skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a self-service carrier gas system for oil chromatogram on-line monitoring device, a serial communication port, including no oil air pump (1), check valve (2), pressure controller (3) and gas storage filter mechanism, no oil air pump (1) be equipped with air inlet (11) and gas outlet (12), the interface end of gas outlet (12) of no oil air pump (1) pass through gas piping connection check valve (2), the other end of check valve (2) pass through gas piping connection gas storage filter mechanism, be equipped with pressure controller (3) on the gas piping of check valve (2) and gas storage filter mechanism, pressure controller (3) are connected no oil air pump (1) through pressure switch (7), gas storage filter mechanism include gas holder (4) and gas filter device (5) be connected with gas holder (4).
2. The self-service gas carrier system for the on-line oil chromatography monitoring device as claimed in claim 1, wherein the gas storage tank (4) comprises a tank body, an input port (41), a first output port (42) for outputting power compressed air and a second output port (43) for connecting a gas filter device (5).
3. The self-service carrier gas system for the on-line oil chromatography monitoring device as claimed in claim 2, wherein the gas filter device (5) comprises a large flow filter (8) for filtering particles and a gas purification tube set (9) for filtering characteristic gas, one end of the large flow filter (8) is connected with the second output port (43) of the gas storage tank (4), and the other end is connected with the gas purification tube set (9).
4. The self-service gas carrier system for the on-line oil chromatography monitoring device as claimed in claim 1, wherein the bottom of the gas storage tank (4) is connected with a drain valve (6).
5. The self-service gas-carrying system for the on-line oil chromatography monitoring device as claimed in claim 1, wherein the oil-free gas pump (1) is connected with an oil-free swing piston type compressor.
6. The self-service gas-carrying system for the on-line oil chromatography monitoring device as claimed in claim 1, wherein the applicable pressure value of the check valve (2) is in the range of 0.05-1 MPa.
7. The self-help carrier gas system for the on-line oil chromatography monitoring device as claimed in claim 3, wherein the gas purification tube set (9) comprises four gas purification tubes connected in sequence.
8. The self-service gas-carrying system for the on-line oil chromatography monitoring device as claimed in claim 4, wherein the drain valve (6) is connected with a time relay or a programmable time controller.
9. The self-service carrier gas system for the oil chromatography online monitoring device according to any one of claims 1 to 8, characterized in that the working process of the system is as follows:
s1, presetting a high pressure value and a low pressure value in the pressure controller (3);
s2, natural air enters the oil-free air pump (1) from an air inlet (11) of the oil-free air pump (1), the oil-free air pump (1) compresses the natural air, the air flows into the air storage tank (4) in a one-way mode through the one-way valve (2), the air storage amount is controlled by the pressure controller (3), the drain valve (6) is controlled through a time relay or a time program, and drainage and impurity removal are carried out on the air storage tank (4) at regular time;
and S3, after draining and removing impurities, carrying out particle filtration, drying treatment and characteristic gas filtration on the gas filled in the gas storage tank (4) through a gas filter device (5), and outputting high-purity air.
10. The self-service gas-carrying system for the on-line oil chromatography monitoring device according to claim 9, wherein in step S2, when the pressure value detected by the pressure controller (3) reaches a set high pressure value, the pressure controller (3) controls the pressure switch (7) to be turned off, and further controls the oil-free gas pump (1) to stop working, and when the pressure value detected by the pressure controller (3) is lower than a set low pressure value, the check valve (2) controls the gas led out by the oil-free gas pump (1) to flow in a one-way manner, the pressure switch (7) is automatically connected, and the oil-free gas pump (1) starts to start.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911160261.9A CN110873770A (en) | 2019-11-23 | 2019-11-23 | Self-service gas-carrying system for oil chromatography on-line monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911160261.9A CN110873770A (en) | 2019-11-23 | 2019-11-23 | Self-service gas-carrying system for oil chromatography on-line monitoring device |
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| CN110873770A true CN110873770A (en) | 2020-03-10 |
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| CN201911160261.9A Pending CN110873770A (en) | 2019-11-23 | 2019-11-23 | Self-service gas-carrying system for oil chromatography on-line monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113758146A (en) * | 2021-09-26 | 2021-12-07 | 国网新疆电力有限公司检修公司 | Self-production carrier gas device of gas-carrying cylinder for on-line monitoring of oil chromatography |
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2019
- 2019-11-23 CN CN201911160261.9A patent/CN110873770A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113758146A (en) * | 2021-09-26 | 2021-12-07 | 国网新疆电力有限公司检修公司 | Self-production carrier gas device of gas-carrying cylinder for on-line monitoring of oil chromatography |
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