CN111453217B - Device and method for on-site inspection or calibration of oil storage device of oil chromatograph in high-altitude area - Google Patents
Device and method for on-site inspection or calibration of oil storage device of oil chromatograph in high-altitude area Download PDFInfo
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- CN111453217B CN111453217B CN202010268435.XA CN202010268435A CN111453217B CN 111453217 B CN111453217 B CN 111453217B CN 202010268435 A CN202010268435 A CN 202010268435A CN 111453217 B CN111453217 B CN 111453217B
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- 238000007689 inspection Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000012806 monitoring device Methods 0.000 claims abstract description 33
- 238000004587 chromatography analysis Methods 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 230000005484 gravity Effects 0.000 claims description 17
- 238000002347 injection Methods 0.000 claims description 13
- 239000007924 injection Substances 0.000 claims description 13
- 230000002572 peristaltic effect Effects 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 2
- 239000000945 filler Substances 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 17
- 230000000694 effects Effects 0.000 description 3
- 230000005489 elastic deformation Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/34—Large containers having floating covers, e.g. floating roofs or blankets
- B65D88/36—Large containers having floating covers, e.g. floating roofs or blankets with relatively movable sections
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/22—Safety features
- B65D90/32—Arrangements for preventing, or minimising the effect of, excessive or insufficient pressure
- B65D90/34—Venting means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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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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Abstract
The invention discloses an on-site inspection or calibration oil storage device and method for an oil chromatograph on-line monitoring device in a high-altitude area, comprising the following steps: the device comprises an exhaust valve, an oil inlet valve, an oil outlet valve, a tee joint, a cylinder body, a piston, a spring, a pump, a filler pipe, an oil outlet pipe and an exhaust pipe; the first end of the tee joint is connected with one end of an oil delivery pipe, and the other end of the oil delivery pipe penetrates through the bottom of the cylinder body to be communicated with the inside of the cylinder body; the second end of the tee joint is connected with a filler pipe, and the filler pipe is provided with an oil inlet valve and a pump; a third end in the tee joint is connected with an oil discharge pipe, and an oil discharge valve is arranged on the oil discharge pipe; the piston is movably arranged on the inner wall of the cylinder body and is provided with an exhaust hole; the spring is arranged between the piston and the upper sealing cover of the cylinder body; one end of the exhaust pipe is communicated with the exhaust hole, and an exhaust valve is arranged on the exhaust pipe; the device has simple structure, stable and convenient operation, can store the gas component content for a long time, is stable and unchanged, and can meet the requirement of on-site inspection or calibration of 3 oil chromatography on-line monitoring devices.
Description
Technical Field
The invention relates to the field of on-site inspection or calibration transformer oil chromatography on-line monitoring devices, in particular to an on-site inspection or calibration oil storage device and method for an on-site oil chromatography on-line monitoring device in a high-altitude area.
Background
The transformer oil chromatography on-line monitoring device is widely applied to transformer substations with voltage levels of 220kV and above, is one of on-line monitoring methods for effectively sensing the transformation fault information, and is gradually applied to high-altitude and high-cold areas at present. The oil chromatograph on-line monitoring device often works normally in the initial operation stage, the accuracy can meet the requirements, and due to the lack of effective inspection or calibration in operation, the accuracy is reduced, the data drift is serious after two or three years of use, and false alarms frequently occur. In order to ensure the accuracy of the detection data of the oil chromatography on-line monitoring device and avoid false alarm or missing alarm event, the oil chromatography on-line monitoring device needs to be checked or calibrated necessarily and timely and effectively.
The on-site inspection or calibration transformer oil chromatographic on-line monitoring device adopts the preparation of an oil sample containing a certain concentration of fault characteristic component gas to compare the off-line data with the on-line monitoring data, calculates the measurement error and repeatability thereof and ranks the oil sample. The gas dissolved in the liquid is influenced by the external pressure and temperature, is easy to escape and has low content, so that the gas is difficult to store for a long time. Because the pressure is low and the temperature difference change is large in the high-altitude area, characteristic component gas dissolved in oil is easy to escape, the content is reduced, and the detection or calibration of the transformer oil chromatographic online monitoring device is affected. The existing oil storage device adopts a micro-positive pressure or pressurizing built-in capsule type oil sample storage mode, and when the mode is used for carrying out on-site inspection or calibration on the transformer oil chromatograph on-line monitoring device in the high-altitude area, the characteristic component gas in the oil escapes due to the reduction of the external atmospheric pressure, the content is changed, the stability is poor, and the inspection or calibration result is distorted. Therefore, a new storage mode is searched for realizing the effectiveness of on-site inspection or calibration of the transformer oil chromatographic online monitoring device.
Disclosure of Invention
The invention aims to solve the problems that characteristic component gas dissolved in oil is easy to escape and the content is changed due to low air pressure and large temperature difference change in a high-altitude area, so that the inspection or calibration of an online monitoring device for transformer oil chromatography is affected, the characteristic component gas in the oil escapes due to the reduction of external atmospheric pressure, the content is changed, the stability is poor, and the inspection or calibration result is distorted.
The invention is realized by the following technical scheme:
an on-site inspection or calibration oil storage device for an on-line monitoring device for oil chromatography in high altitude areas, the device comprising:
The device comprises an exhaust valve, an oil inlet valve, an oil outlet valve, a tee joint, an oil storage cylinder body, a piston, a spring, a pump, an oil injection pipe, an oil outlet pipe, an exhaust pipe and an oil filling pipe;
The first end of the tee joint is connected with one end of the oil filling pipe, and the other end of the oil filling pipe penetrates through the bottom of the oil storage cylinder body to be communicated with the inside of the oil storage cylinder body;
The second end of the tee joint is connected with the oil injection pipe, and the oil inlet valve and the pump are arranged on the oil injection pipe;
a third end in the tee joint is connected with the oil drain pipe, and the oil drain valve is arranged on the oil drain pipe;
The piston is movably arranged on the inner wall of the oil storage cylinder body and can move up and down along the inner wall of the oil storage cylinder body, the area below the piston in the oil storage cylinder body is an oil sample storage area, the area above the piston in the oil storage cylinder body is communicated with the outside atmosphere, and the piston is provided with an exhaust hole;
The lower end of the spring is connected with the upper surface of the piston, and the upper end of the spring is connected with the lower surface of the upper sealing cover of the oil storage cylinder body;
One end of the exhaust pipe extends from the upper sealing cover of the oil storage cylinder body to the inside of the oil storage cylinder body to be communicated with the exhaust hole after penetrating through the upper sealing cover of the oil storage cylinder body, and the exhaust valve is arranged on the exhaust pipe.
According to the application, the oil storage cylinder is provided with the oil inlet and the oil outlet, the oil inlet and the oil outlet are provided with the three-way joint, the oil discharge pipe and the oil injection pipe are connected through the three-way joint, the oil discharge valve and the oil inlet valve are arranged between the oil discharge pipe and the oil injection pipe and between the three-way joint to control an oil sample in the oil storage cylinder, and the storage method mainly adopts internal and external air pressure balance, so that the piston is arranged in the oil storage cylinder, the oil storage cylinder is a perspective cylinder body which is convenient for observing the oil sample, the piston is umbrella skirt-shaped and is reversely buckled, the oil storage cylinder body is divided into two parts, a spring is arranged between the umbrella skirt-shaped piston and an upper sealing cover of the perspective cylinder body, so that the oil storage cylinder body can overcome the gravity of the piston and the resultant force of friction resistance between the piston and the cylinder wall through elastic deformation of the spring, and the air pressure of the oil sample in the cylinder body is ensured to be consistent with the external atmospheric pressure; the diameter of the spring is slightly smaller than that of the piston, so that the piston is vertically stabilized to avoid jamming.
Furthermore, the cylinder body is a perspective cylinder body, so that the oil sample state can be observed conveniently.
Further, the piston is an umbrella skirt-shaped piston;
The umbrella skirt-shaped piston is movably arranged on the inner wall of the oil storage cylinder body in an inverted buckle mode, and an opening is formed in the center of the top end of the umbrella skirt-shaped piston.
Further, the pump is a peristaltic pump, and bubbles are not generated in the sample during the process of pumping the sample by the peristaltic pump.
Furthermore, the diameter of the spring is smaller than that of the piston, and the difference value between the diameter of the spring and the diameter of the piston is in a preset range, so that the piston is vertically stabilized to avoid jamming.
Wherein the workflow of the device comprises the following steps:
(1) Oiling: and closing the oil discharge valve and the exhaust valve, and opening the oil inlet valve. And starting a peristaltic pump, injecting the prepared oil sample into the oil storage cylinder, and stopping oil injection after the oil is injected to the specified scale position.
(2) And (3) discharging bubbles: and opening the exhaust valve, then continuing to inject oil until the oil discharge pipe orifice overflows the oil sample, indicating that bubbles in the oil storage cylinder are completely discharged, and closing the exhaust valve and the oil injection valve.
(3) Oil sample use: connecting an oil discharge pipe with an oil inlet of the oil chromatography on-line monitoring device, opening an oil discharge valve, and injecting an oil sample into an oil-gas separation unit of the oil chromatography on-line monitoring device through an oil pump of the oil chromatography monitoring device.
An oil storage method for on-site inspection or calibration of an oil chromatograph on-line monitoring device in a high-altitude area comprises the following steps:
Testing the friction resistance between the piston and the cylinder wall, designing the spring elastic coefficient and the gravity of the piston, and measuring and calculating the air pressure of the oil sample storage area;
when the air pressure of the oil sample storage area is equal to the external atmospheric pressure, the content of each component in the oil storage cylinder CH4、C2H4、C2H6、C2H2、H2、CO、CO2 is stable, and the storage operation is completed.
Further, the air pressure of the oil sample storage area is equal to the sum of the air pressure generated by the combined force of the external atmospheric pressure, the gravity of the piston, the friction resistance of the piston and the cylinder wall and the elasticity of the spring, namely
Wherein P 1 represents the air pressure of the oil sample storage area, P 0 represents the external atmospheric pressure, G represents the gravity of the piston, f 1 represents the friction resistance between the piston and the cylinder wall, f 2 represents the elastic force of the spring, and S represents the area of the piston;
f2＝kX；
Where k represents the spring rate and X represents the elastic deformation of the spring.
When the content of each component dissolved in CH4、C2H4、C2H6、C2H2、H2、CO、CO2 in the oil storage cylinder is stable, the friction force f 1 between the piston and the cylinder wall is equal to the sum of the gravity G of the piston and the spring force f 2 and opposite to the gravity G of the piston and the spring force f 2, namely |G+f 2|＝|f1 |, the friction force f 1 is formed byAnd obtaining P 1＝P0, namely the internal and external air pressures of the piston are consistent.
According to the cylinder internal and external air pressure balance principle, through rigorous scientific measurement, the friction force between the piston and the cylinder wall is tested, and the proper spring coefficient and the weight of the piston are selected by utilizing G+f 2＝f1, so that the internal and external air balance of the cylinder is ensured when the piston slides downwards.
The storage method adopted by the invention is an internal and external air pressure balancing method of the oil storage cylinder body:
The combined force of the piston seal, the force of the spring above the piston, the gravity of the piston and the friction resistance of the piston and the cylinder wall is zero, so that the internal and external air pressures of the oil storage cylinder are consistent, and the content of the characteristic component gas in the oil sample is ensured to be stable. The oil storage mode can effectively solve the problems of poor oil sample storage effect, short storage time and influence of high altitude on the content of characteristic component gas in oil.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the invention relates to an on-site inspection or calibration oil storage device and method for an oil chromatograph on-line monitoring device in a high-altitude area, which ensure that the internal and external air pressures of an oil storage cylinder are consistent and the gas content of characteristic components in an oil sample is ensured to be stable by adopting a piston seal, the force of a spring above the piston, the gravity of the piston and the friction resistance of a cylinder wall, wherein the resultant force of the piston and the friction resistance of the piston is zero. The oil storage mode can effectively solve the problems of poor oil sample storage effect, short storage time and influence of high altitude on the content of characteristic component gas in oil.
2. The on-site inspection or calibration oil storage device and method for the on-site inspection or calibration of the oil chromatography on-line monitoring device in the high-altitude area provide oil samples with stable content of characteristic component gas and long storage time for the on-site inspection or calibration of the oil chromatography on-line monitoring device in the high-altitude area, and the device has simple structure, is easy to operate and portable, and can meet the on-site inspection or calibration requirements of 3 on-site oil chromatography on-line monitoring devices.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:
FIG. 1 is a schematic diagram of an on-site inspection or calibration oil storage device of an on-line monitoring device for oil chromatography in high altitude areas of the present invention;
FIG. 2 is a flow chart of the method for on-site inspection or calibration of oil storage of the on-line monitoring device for oil chromatography in high altitude areas of the present invention;
The reference numerals in the drawings and the names of the corresponding parts are as follows:
1-an exhaust valve; 2-an oil drain valve; 3-an oil inlet valve; 4-an oil storage cylinder; 5-a piston; 6-springs and 7-exhaust pipes; 8-oil discharge pipe; 9-tee joint; 10-an oil injection pipe; 11-pump.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present invention and the descriptions thereof are for illustrating the present invention only and are not to be construed as limiting the present invention.
Example 1
As shown in fig. 1, the oil chromatograph on-line monitoring device for high altitude areas is used for checking or calibrating an oil storage device on site, and the device comprises:
The device comprises an exhaust valve 1, an oil inlet valve 3, an oil discharge valve 2, a tee joint 9, an oil storage cylinder body 4, a piston 5, a spring 6, a pump 11, a filler pipe 10, an oil discharge pipe 8, an exhaust pipe 7 and an filler pipe;
The first end of the tee joint 9 is connected with one end of the oil filling pipe, and the other end of the oil filling pipe penetrates through the bottom of the oil storage cylinder body 4 and is communicated with the interior of the oil storage cylinder body 4;
the second end of the tee joint 9 is connected with the oil filling pipe 10, and the oil filling pipe 10 is provided with the oil inlet valve 3 and the pump 11;
a third end in the tee 9 is connected with the oil drain pipe 8, and the oil drain valve 2 is arranged on the oil drain pipe 8;
The piston 5 is movably mounted on the inner wall of the oil storage cylinder body 4 and can move up and down along the inner wall of the oil storage cylinder body 4, the area, below the piston 5, inside the oil storage cylinder body 4 is an oil sample storage area, the area, above the piston 5, inside the oil storage cylinder body 4 is communicated with the outside atmosphere, and an exhaust hole is formed in the piston 5;
The lower end of the spring 6 is connected with the upper surface of the piston 5, and the upper end of the spring 6 is connected with the lower surface of the upper sealing cover of the oil storage cylinder body 4;
One end of the exhaust pipe 7 extends from the upper sealing cover of the oil storage cylinder body 4 to the inside of the oil storage cylinder body 4 to be communicated with the exhaust hole after passing through, and the exhaust valve 1 is arranged on the exhaust pipe 7.
Furthermore, the cylinder body is a perspective cylinder body, so that the oil sample state can be observed conveniently.
Further, the piston is an umbrella skirt-shaped piston;
The umbrella skirt-shaped piston is movably arranged on the inner wall of the oil storage cylinder body in an inverted buckle mode, and an opening is formed in the center of the top end of the umbrella skirt-shaped piston.
Further, the pump is a peristaltic pump, and the peristaltic pump does not generate bubbles in the process of pumping the sample.
Further, the diameter of the spring is smaller than the diameter of the piston, and the difference between the diameter of the spring and the diameter of the piston is within a preset range.
In the embodiment of the application, the upper end of the spring between the umbrella skirt-shaped piston and the perspective cylinder upper sealing cover is fixed on the cylinder upper sealing cover, the lower end is fixed on the upper part of the piston, and the resultant force of the elastic force of the spring, the gravity of the piston and the friction resistance of the cylinder wall is zero, so that the internal and external air pressures of the oil storage cylinder are consistent, and the content of characteristic component gas in an oil sample is ensured to be stable; the diameter of the spring is slightly smaller than that of the piston, so that the piston is vertically stabilized to avoid jamming.
In the embodiment of the application, the working flow of the device comprises the following steps:
1 oiling: and closing the oil discharge valve and the exhaust valve, and opening the oil inlet valve. And starting a peristaltic pump, injecting the prepared oil sample into the oil storage cylinder, and stopping oil injection after the oil is injected to the specified scale position.
2, Exhausting bubbles: and opening the exhaust valve, then continuing to inject oil until the oil discharge pipe orifice overflows the oil sample, indicating that bubbles in the oil storage cylinder are completely discharged, and closing the exhaust valve and the oil injection valve.
3 Oil sample use: connecting an oil discharge pipe with an oil inlet of the oil chromatography monitoring device, opening an oil discharge valve, and injecting an oil sample into an oil-gas separation unit of the oil chromatography monitoring device through an oil pump of the oil chromatography monitoring device.
The device adopts a perspective cylinder body as an oil sample storage cylinder body; the device adopts a piston with an umbrella skirt-shaped structure and an exhaust hole to store an oil sample; the device uses the combination force of spring elastic force, piston gravity and friction resistance between the piston and the cylinder wall as zero, and the constant pressure storage mode ensures that the air pressure of the oil sample in the cylinder body is consistent with the external atmospheric pressure.
As shown in fig. 2, the method for on-site checking or calibrating oil storage of the oil chromatograph on-line monitoring device in the high altitude area comprises the following steps:
According to the principle of internal and external air pressure balance of the cylinder body, the frictional resistance between the piston and the cylinder wall is tested, the spring elastic coefficient and the gravity of the piston are designed, and the air pressure of the oil sample storage area is measured and calculated;
when the air pressure of the oil sample storage area is equal to the external atmospheric pressure, the content of each component in the oil storage cylinder CH4、C2H4、C2H6、C2H2、H2、CO、CO2 is stable, and the storage operation is completed.
Further, the air pressure of the oil sample storage area is equal to the sum of the air pressure generated by the combined force of the external atmospheric pressure, the gravity of the piston, the friction resistance of the piston and the cylinder wall and the elasticity of the spring, namely
Wherein P 1 represents the air pressure of the oil sample storage area, P 0 represents the external atmospheric pressure, G represents the gravity of the piston, f 1 represents the friction resistance between the piston and the cylinder wall, f 2 represents the elastic force of the spring, and S represents the area of the piston;
f2＝kX；
Where k represents the spring rate and X represents the elastic deformation of the spring.
When the content of each component dissolved in CH4、C2H4、C2H6、C2H2、H2、CO、CO2 in the oil storage cylinder is stable, the friction force f 1 between the piston and the cylinder wall is equal to the sum of the gravity G of the piston and the spring force f 2 and opposite to the gravity G of the piston and the spring force f 2, namely |G+f 2|＝|f1 |, the friction force f 1 is formed byAnd obtaining P 1＝P0, namely the internal and external air pressures of the piston are consistent.
According to the cylinder internal and external air pressure balance principle, through rigorous scientific measurement, the friction force between the piston and the cylinder wall is tested, and the proper spring coefficient and the weight of the piston are selected by utilizing G+f 2＝f1, so that the internal and external air balance of the cylinder is ensured when the piston slides downwards.
Compared with CH4、C2H4、C2H6、C2H2、H2、CO、CO2 caused by adopting a piston rod type oil storage device to store oil in the prior art, the escape degree and the loss rate of gases such as CH4、C2H4、C2H6、C2H2、H2、CO、CO2 are smaller through the device and the oil storage method, and the escape degree is about-10% and the error is even larger than-15% through adopting the piston rod type oil storage device to store oil. The technical effects obtained by the device and the oil storage method of the embodiment are shown in tables 1, 2 and 3, and it can be seen from the tables that the escape degree of the gases with different concentrations is-0.6% to-0.1%, and the relative error is-5% to-1%.
TABLE 1 accuracy and emittance of different concentrations CH4、C2H4、C2H6、C2H2、H2、CO、CO2
TABLE 2 accuracy and emittance of different concentrations CH4、C2H4、C2H6、C2H2、H2、CO、CO2
TABLE 3 accuracy and emittance of different concentrations CH4、C2H4、C2H6、C2H2、H2、CO、CO2
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (5)
1. The device for on-site inspection or calibration of the oil storage device of the oil chromatograph in the high-altitude area is characterized by comprising:
the device comprises an exhaust valve (1), an oil inlet valve (3), an oil discharge valve (2), a tee joint (9), an oil storage cylinder body (4), a piston (5), a spring (6), a pump (11), an oil injection pipe (10), an oil discharge pipe (8), an exhaust pipe (7) and an oil filling pipe;
the first end of the tee joint (9) is connected with one end of the oil filling pipe, and the other end of the oil filling pipe penetrates through the bottom of the oil storage cylinder body (4) and is communicated with the inside of the oil storage cylinder body (4);
The second end of the tee joint (9) is connected with the oil injection pipe (10), and the oil inlet valve (3) and the pump (11) are arranged on the oil injection pipe (10);
a third end in the tee joint (9) is connected with the oil drain pipe (8), and the oil drain valve (2) is arranged on the oil drain pipe (8);
The piston (5) is movably arranged on the inner wall of the oil storage cylinder body (4) and can move up and down along the inner wall of the oil storage cylinder body (4), the area, below the piston (5), inside the oil storage cylinder body (4) is an oil sample storage area, the area, above the piston (5), inside the oil storage cylinder body (4) is communicated with the outside atmosphere, and the piston (5) is provided with an exhaust hole;
The lower end of the spring (6) is connected with the upper surface of the piston (5), and the upper end of the spring (6) is connected with the lower surface of the upper sealing cover of the oil storage cylinder body (4);
One end of the exhaust pipe (7) extends into the oil storage cylinder body (4) to be communicated with the exhaust hole after passing through the upper sealing cover of the oil storage cylinder body (4), and the exhaust valve (1) is arranged on the exhaust pipe (7);
The method comprises the steps of testing the friction resistance between a piston and a cylinder wall, designing the spring elastic coefficient and the gravity of the piston, and measuring and calculating the air pressure of an oil sample storage area; when the air pressure of the oil sample storage area is equal to the external atmospheric pressure, the content of each component in the oil storage cylinder CH4、C2H4、C2H6、C2H2、H2、CO、CO2 is stable, and the storage operation is completed;
the air pressure of the oil sample storage area is equal to the sum of the air pressure generated by the resultant force of the external atmospheric pressure, the gravity of the piston, the friction resistance of the piston and the cylinder wall and the elasticity of the spring, namely
Where P 1 denotes the air pressure of the oil sample storage area, P 0 denotes the external atmospheric pressure, G denotes the piston weight, f 1 denotes the friction resistance of the piston with the cylinder wall, f 2 denotes the spring force of the spring, and S denotes the area of the piston.
2. The on-site inspection or calibration oil storage device of the high altitude area oil chromatography on-line monitoring device according to claim 1, characterized in that the oil storage cylinder (4) is a perspective cylinder.
3. The on-site inspection or calibration oil storage device of the high altitude area oil chromatography on-line monitoring device according to claim 1, characterized in that the piston (5) is an umbrella-shaped piston;
The umbrella skirt-shaped piston is movably arranged on the inner wall of the oil storage cylinder body (4) in an inverted buckle shape, and an exhaust hole is arranged at the center of the top end of the umbrella skirt-shaped piston.
4. The on-site inspection or calibration oil storage device of the high altitude area oil chromatography on-line monitoring device according to claim 1, characterized in that the pump (11) is a peristaltic pump.
5. The on-site inspection or calibration oil storage device of the high-altitude area oil chromatography on-line monitoring device according to claim 1, wherein the diameter of the spring (6) is smaller than the diameter of the piston (5), and the difference between the diameter of the spring (6) and the diameter of the piston (5) is within a preset range.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921469210 | 2019-09-04 | ||
| CN201921469210X | 2019-09-04 |
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| CN111453217A CN111453217A (en) | 2020-07-28 |
| CN111453217B true CN111453217B (en) | 2024-05-14 |
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| CN202020503264.XU Active CN211870290U (en) | 2019-09-04 | 2020-04-08 | On-site inspection or calibration oil storage device for oil chromatography on-line monitoring device in high-altitude area |
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| CN112255351A (en) * | 2020-10-23 | 2021-01-22 | 成都佳信电气工程技术有限公司 | Online chromatogram standard oil preparation device |
| CN112389812A (en) * | 2020-11-09 | 2021-02-23 | 广西电网有限责任公司电力科学研究院 | Small oil storage device applied to on-site detection on-line chromatographic device |
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| CN111453217A (en) | 2020-07-28 |
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