CN112461637A - Standard oil sample automatic quantitative mixer for detecting dissolved gas in oil on-line monitoring device and standard oil sample configuration method - Google Patents
Standard oil sample automatic quantitative mixer for detecting dissolved gas in oil on-line monitoring device and standard oil sample configuration method Download PDFInfo
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- CN112461637A CN112461637A CN202011293144.2A CN202011293144A CN112461637A CN 112461637 A CN112461637 A CN 112461637A CN 202011293144 A CN202011293144 A CN 202011293144A CN 112461637 A CN112461637 A CN 112461637A
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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
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; viscous liquids; paints; inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2835—Oils, i.e. hydrocarbon liquids specific substances contained in the oil or fuel
- G01N33/2841—Oils, i.e. hydrocarbon liquids specific substances contained in the oil or fuel gas in oil, e.g. hydrogen in insulating oil
Abstract
The invention discloses a standard oil sample automatic quantitative mixer for detecting a device for online monitoring of dissolved gas in oil, which comprises a cylinder body, a piston, a stirring device, an oil inlet, an oil outlet, an air injection port, an evacuation port, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a fifth electromagnetic valve, a first one-way valve, a second one-way valve, a third one-way valve, a three-way electromagnetic valve, a heating device, a sensor group, a vacuum pump, an electric cylinder and an electric control box, wherein the cylinder body is provided with a plurality of oil inlet holes; the piston and the sensor group are arranged in the cylinder body, the electric cylinder is arranged above the piston, the stirring device is arranged at the bottom of the cylinder body, and the oil inlet is communicated with the cylinder body after passing through the three-way electromagnetic valve, the heating device and the one-way valve III; the oil outlet is communicated with the cylinder body through a second electromagnetic valve; the gas injection port is communicated with the cylinder body through a first electromagnetic valve; the evacuation port is communicated with the cylinder body through a third electromagnetic valve, a fourth electromagnetic valve, a first one-way valve, a vacuum pump, a second one-way valve and a fifth electromagnetic valve. The invention can more conveniently and accurately prepare the standard oil sample for the detection of the online monitoring device for the dissolved gas in the oil, and improve the preparation speed.
Description
Technical Field
The invention relates to the technical field of preparation of standard oil samples for detection of online monitoring devices for gas dissolved in oil, in particular to an automatic quantitative mixing instrument for the standard oil samples for detection of the online monitoring devices for the gas dissolved in oil and a preparation method of the standard oil samples.
Background
The online monitoring device for the gas dissolved in the oil is widely applied in companies, and the performance of the online monitoring device for the gas dissolved in the transformer oil is reduced after the online monitoring device is used for a long time, so that the change of the gas dissolved in the insulating oil is difficult to accurately and timely detect.
In order to ensure the measurement accuracy of the online monitoring device for the dissolved gas in the oil, the device needs to be checked through a standard oil sample, and according to the DLT 1432.2-2016 transformer equipment online monitoring device checking specification part 2: the requirement in the transformer oil dissolved gas on-line monitoring is that the transformer oil dissolved gas on-line monitoring device needs to pass data accuracy and repeatability tests of a plurality of standard oil sample verification devices. Therefore, a standard transformer oil sample containing a certain amount of dissolved gas needs to be periodically configured to perform performance detection on the online monitoring device for the dissolved gas in the oil, so as to confirm that the online monitoring device has reliable performance and ensure the safe operation of the power transformer.
The existing standard oil sample preparation method for the on-line monitoring device for the gas dissolved in the oil is to add quantitative gas and oil into a quantitative needle cylinder or obtain a standard oil sample through a very large oil preparation device, so that the preparation efficiency is low, the preparation method is complex, the on-site implementation is very inconvenient, and the detection operation of the on-line monitoring device for the gas dissolved in the transformer oil is seriously influenced. The use of existing instrumentation to conduct the test has the following disadvantages:
(1) the standard oil sample configuration device is too large in size and difficult to transport to a device installation site for direct test, so that the configured oil sample needs to be transported to an oil storage device with a smaller size and then transported to the site.
(2) The whole set of oil distribution device is large in size, low in carrying efficiency and large in loading and unloading workload, a forklift or a crane is often required to be matched with a loading and unloading vehicle, and the whole set of oil distribution device is often not suitable for performance testing of devices which are small in number and long in distance.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the automatic quantitative mixing instrument for the standard oil sample for the on-line monitoring device for the dissolved gas in the oil, which can automatically control the injection, configuration and discharge of the oil sample and air through the electric control box, can more conveniently and accurately prepare the standard oil sample, improve the preparation speed and facilitate the on-site inspection.
In order to achieve the purpose, the invention adopts the technical scheme that:
an automatic quantitative mixing instrument for standard oil samples for testing an online monitoring device for gas dissolved in oil comprises a cylinder body, a piston, a stirring device, an oil inlet, an oil outlet, an air injection port, an evacuation port, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a fifth electromagnetic valve, a first check valve, a second check valve, a third check valve, a three-way electromagnetic valve, a heating device, a sensor group, a vacuum pump, an electric cylinder and an electric control box;
the piston is arranged in the cylinder body, the electric cylinder is arranged above the piston and used for controlling the piston to move in the vertical direction, and the stirring device is arranged at the bottom in the cylinder body and is rotationally connected with the cylinder body;
the oil inlet hole is communicated with the cylinder body after sequentially passing through a three-way electromagnetic valve, a heating device and a one-way valve III; the oil outlet is communicated with the cylinder body through a second electromagnetic valve; the gas injection port is communicated with the cylinder body through a first electromagnetic valve; the emptying port is communicated with the cylinder body sequentially through a third electromagnetic valve, a fourth electromagnetic valve, a first one-way valve, a vacuum pump, a second one-way valve and a fifth electromagnetic valve;
the sensor group comprises a pressure sensor and a temperature sensor and is arranged in the cylinder body;
the stirring device, the heating device, the vacuum pump, the electric cylinder, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the three-way electromagnetic valve and the sensor group are all electrically connected with the electric control box.
Preferably, the mixer has a housing, and the housing is mounted on the cart for facilitating the transportation of the mixed liquid.
Preferably, in order to obtain information such as physical indexes of the insulating oil in the cylinder body, the on-off state of the valve and the like in real time, the shell is provided with a liquid crystal display screen electrically connected with the electrical control box.
On the other hand, the invention also provides a standard oil sample configuration method for the detection of the on-line monitoring device for the dissolved gas in the oil, which is realized based on the mixer and comprises the following steps:
(1) and closing all the valves, opening the third electromagnetic valve, the fourth electromagnetic valve and the fifth electromagnetic valve through the electric control box, starting the vacuum pump, and pumping out air in the inner space through the evacuation port to enable the cylinder body to be in a vacuum state.
(2) When the interior of the cylinder body is close to a vacuum state, closing the third electromagnetic valve, the fourth electromagnetic valve and the fifth electromagnetic valve, opening the first electromagnetic valve, introducing sample component gas into the cylinder body through the gas injection port, and closing the first electromagnetic valve after introducing a proper amount of gas;
(3) opening a three-way electromagnetic valve, enabling standard sample oil to flow through a heating device through an oil inlet, entering a cylinder body after being heated to a certain temperature, starting a stirring device through an electrical control box, enabling insulating oil in the cylinder body to be in full contact with gas through stirring, accelerating the dissolution of the gas, monitoring the gas pressure in the cylinder body in real time by using a pressure sensor in a sensor group, controlling a piston to vertically move through an electric cylinder, and keeping the gas pressure between 10 and 40kPa all the time;
(4) starting a heating device, monitoring the temperature in the cylinder body in real time through a temperature sensor in a sensor group, and keeping the temperature in the cylinder body between 45 and 52 ℃ by using an electric control box;
(5) after the stirring device works for a proper time, gas is gradually dissolved in the standard sample oil, when the gas is basically dissolved, the oil sample is prepared, the second electromagnetic valve is opened at the moment, and the oil sample flows out through the oil outlet.
Compared with the prior art, the invention has the beneficial effects that:
the automatic quantitative mixing instrument for the standard oil sample of the transformer oil evacuates air in the cylinder body before the oil sample is configured through the evacuation port and the vacuum pump to enable the cylinder body to be approximate to a vacuum state, standard oil is injected or exhausted through the oil inlet and outlet nozzles, and the heating device is mainly responsible for heating the temperature of the insulating oil in the cylinder body and keeping the temperature of the insulating oil in a certain temperature range. The pressure sensor and the temperature sensor can sense the temperature and the pressure of the insulating oil in the cylinder body in real time and are matched with the heating device and the piston to maintain the temperature and the pressure in a certain range.
1. Through sensor group, can real-time supervision temperature, pressure in the cylinder body, temperature, pressure in the accurate control standard oil configuration in-process cylinder body.
2. The on-off of each electromagnetic valve, the movement of the electric cylinder, the starting and the stopping of the stirring device and the heating device in the standard oil configuration process are controlled by the electric control box, the automation degree of the equipment is higher, and more friendly and visual human-computer interaction is realized through the liquid crystal display screen.
3. The vacuum pump is additionally arranged on the basis of the traditional automatic quantitative mixing device for the standard oil, so that gas in the container is pumped out before configuration, the influence of residual gas in the cylinder body is eliminated to the maximum extent, and the configuration accuracy of the standard oil is improved.
4. The stirring device and the heating device are utilized to accelerate the gas dissolving speed, the standard oil preparation speed is greatly improved, and the field operation time is shortened.
5. The device shell is integrally designed into a trolley type, so that the field operation and the carrying are more convenient.
Drawings
FIG. 1 is a schematic diagram of a standard oil sample automatic quantitative mixer for the detection of the online monitoring device for the gas dissolved in oil according to the present invention;
FIG. 2 is a view showing the internal structure of a standard oil sample automatic quantitative mixer for the inspection of an online monitoring device for gas dissolved in oil according to the present invention;
description of reference numerals: 1-a cylinder body; 2-a piston; 3-a stirring device; 4-oil inlet hole; 5-oil outlet; 6-gas injection port; 7-evacuation; 8, a first electromagnetic valve; 9-electromagnetic valve II; 10-electromagnetic valve III; 11-electromagnetic valve four; 12-electromagnetic valve five; 13-a one-way valve I; 14-one-way valve II; 15-one-way valve III; 16-three-way solenoid valve; 17-a heating device; 18-a sensor group; 19-a vacuum pump; 20-an electric cylinder; 21-a liquid crystal display screen; 22-go-cart.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of embodiments of the present invention, and not all embodiments.
In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or as implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
As shown in fig. 1 and 2, the standard oil sample automatic quantitative mixer for the on-line monitoring device of the gas dissolved in oil inspection of the present invention is fixed on a cart 22, and includes a cylinder 1, a piston 2, a stirring device 3, an oil inlet 4, an oil outlet 5, an air injection port 6, an evacuation port 7, a first electromagnetic valve 8, a second electromagnetic valve 9, a third electromagnetic valve 10, a fourth electromagnetic valve 11, a fifth electromagnetic valve 12, a first one-way valve 13, a second one-way valve 14, a third one-way valve 15, a three-way electromagnetic valve 16, a heating device 17, a sensor group 18, a vacuum pump 19, an electric cylinder 20, and an electric control box. The whole mixer is rectangular, and the front surface of the shell of the mixer is provided with a liquid crystal display screen 21 which is electrically connected with the electrical control box and used for providing information such as physical indexes of insulating oil in the cylinder body 1, on-off state of a valve and the like.
The sensor group 18 mainly comprises a pressure sensor and a temperature sensor, the sensor group 18 and the piston 2 are both arranged in the cylinder body 1, and the stirring device 3 is arranged at the bottom of the cylinder body 1 and is rotationally connected with the cylinder body 1. The bottom of the cylinder body 1 is also provided with a gas injection port 6 and an oil outlet 5, and the gas injection port 6 and the oil outlet 5 are respectively provided with a first electromagnetic valve 8 and a second electromagnetic valve 9. And an evacuation port 7 is arranged on the same side of the gas injection port 6, the on-off of the pipeline is controlled by a third electromagnetic valve 10, and a fourth electromagnetic valve 11, a 12, a first check valve 13 and a second check valve 14 are arranged at two ends of a vacuum pump 19 and are used for limiting the flow direction of gas. The electric cylinder 21 on the top of the cylinder 1 is provided with a three-way electromagnetic valve 16 connected with the oil inlet 4 for controlling the injection of the standard oil sample, and the electric cylinder 21 is mainly used for controlling the movement of the piston 2 in the vertical direction and adjusting the air pressure in the cylinder 1 by matching with a pressure sensor. And the heating device 17 is arranged at the bottom of the cylinder body 1, is positioned between the three-way valve 15 and the three-way electromagnetic valve 16, and is responsible for heating the injected standard sample oil and controlling the temperature of the cylinder body 1. The electric control box can control the on-off of each valve, and can start or stop the stirring device 3, the heating device 17, the vacuum pump 19 and the electric cylinder 20.
According to the automatic quantitative mixing instrument for the standard oil sample of the transformer oil, air in the cylinder body 1 is emptied before the oil sample is configured through the emptying port 7 and the vacuum pump 19, so that the interior of the cylinder body 1 is approximate to a vacuum state, the standard oil is injected or discharged through the oil inlet hole 4 and the oil outlet hole 5, and the heating device 17 is mainly responsible for heating the insulating oil in the cylinder body 1 and keeping the insulating oil in a certain temperature range. The pressure sensor and the temperature sensor can sense the temperature and the pressure of the insulating oil in the cylinder body 1 in real time and are matched with the heating device 17 and the piston 2 to maintain the temperature and the pressure in a certain range.
When the standard transformer oil needs to be prepared, the working process of the invention is as follows:
1. firstly, all valves are closed, the third electromagnetic valve 10, the fourth electromagnetic valve 11 and the fifth electromagnetic valve 12 are opened through the electric control box 20, the vacuum pump 19 is started, air in the internal space of the cylinder body 1 is pumped out through the evacuation port 7, and the internal space of the cylinder body 1 is as close to a vacuum state as possible.
2. When the interior of the cylinder body 1 is close to a vacuum state, the electromagnetic valve III 10 is closed, the electromagnetic valve IV 11 and the electromagnetic valve V12 are closed, the electromagnetic valve I8 is opened, the sample component gas enters the cylinder body 1 through the gas injection port 6, and the opened electromagnetic valve I8 is closed after a proper amount of gas is introduced.
3. Open three-way solenoid valve 16, standard sample oil passes through inlet port 4, heating device 17 flows through, get into in the cylinder body 1 after being heated to certain temperature, open agitating unit 3 through the electrical control box simultaneously, make the insulating oil in the cylinder body 1 fully with gaseous contact through the stirring, gaseous dissolution accelerates, when pouring into the oil sample, utilize the pressure sensor real-time supervision cylinder body 1 in the pressure sensor among the sensor group 18, do vertical motion through electric jar 21 control piston 2, keep atmospheric pressure between 10 ~ 40kPa all the time.
4. The operation of the heating device 17 is controlled, the temperature in the cylinder body 1 is monitored in real time through a temperature sensor in the sensor group 18, and the temperature in the cylinder body 1 is kept between 45 ℃ and 52 ℃ through an electric control box.
5. After the stirring device 3 works for a proper time, the gas is gradually dissolved in the standard sample oil, when the gas is basically dissolved, the preparation of the oil sample is completed, at the moment, the second electromagnetic valve 9 is opened, and the oil sample flows out through the oil outlet 5.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (4)
1. The utility model provides a gaseous on-line monitoring device inspection is with automatic quantitative mixing appearance of standard oil appearance in oil which characterized in that: the device comprises a cylinder body, a piston, a stirring device, an oil inlet, an oil outlet, an air injection port, an evacuation port, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a fifth electromagnetic valve, a first one-way valve, a second one-way valve, a third one-way valve, a three-way electromagnetic valve, a heating device, a sensor group, a vacuum pump, an electric cylinder and an electric control box;
the piston is arranged in the cylinder body, the electric cylinder is arranged above the piston and used for controlling the piston to move in the vertical direction, and the stirring device is arranged at the bottom in the cylinder body and is rotationally connected with the cylinder body;
the oil inlet hole is communicated with the cylinder body after sequentially passing through a three-way electromagnetic valve, a heating device and a one-way valve III; the oil outlet is communicated with the cylinder body through a second electromagnetic valve; the gas injection port is communicated with the cylinder body through a first electromagnetic valve; the emptying port is communicated with the cylinder body sequentially through a third electromagnetic valve, a fourth electromagnetic valve, a first one-way valve, a vacuum pump, a second one-way valve and a fifth electromagnetic valve;
the sensor group comprises a pressure sensor and a temperature sensor and is arranged in the cylinder body;
the stirring device, the heating device, the vacuum pump, the electric cylinder, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the three-way electromagnetic valve and the sensor group are all electrically connected with the electric control box.
2. The automatic quantitative mixer of standard oil sample for the on-line monitoring device of the gas dissolved in the oil according to claim 1, characterized in that: the mixer has a housing, and the housing is mounted on the cart.
3. The automatic quantitative mixer of standard oil sample for the on-line monitoring device of the gas dissolved in the oil according to claim 1, characterized in that: and the shell is provided with a liquid crystal display screen electrically connected with the electric control box.
4. A standard oil sample configuration method for detecting a device for online monitoring of dissolved gas in oil is realized on the basis of the mixer in any one of claims 1 to 3, and is characterized in that: the method comprises the following steps:
(1) and closing all the valves, opening the third electromagnetic valve, the fourth electromagnetic valve and the fifth electromagnetic valve through the electric control box, starting the vacuum pump, and pumping out air in the inner space through the evacuation port to enable the cylinder body to be in a vacuum state.
(2) When the interior of the cylinder body is close to a vacuum state, closing the third electromagnetic valve, the fourth electromagnetic valve and the fifth electromagnetic valve, opening the first electromagnetic valve, introducing sample component gas into the cylinder body through the gas injection port, and closing the first electromagnetic valve after introducing a proper amount of gas;
(3) opening a three-way electromagnetic valve, enabling standard sample oil to flow through a heating device through an oil inlet, entering a cylinder body after being heated to a certain temperature, starting a stirring device through an electrical control box, enabling insulating oil in the cylinder body to be in full contact with gas through stirring, accelerating the dissolution of the gas, monitoring the gas pressure in the cylinder body in real time by using a pressure sensor in a sensor group, controlling a piston to vertically move through an electric cylinder, and keeping the gas pressure between 10 and 40kPa all the time;
(4) starting a heating device, monitoring the temperature in the cylinder body in real time through a temperature sensor in a sensor group, and keeping the temperature in the cylinder body between 45 and 52 ℃ by using an electric control box;
(5) after the stirring device works for a proper time, gas is gradually dissolved in the standard sample oil, when the gas is basically dissolved, the oil sample is prepared, the second electromagnetic valve is opened at the moment, and the oil sample flows out through the oil outlet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011293144.2A CN112461637A (en) | 2020-11-18 | 2020-11-18 | Standard oil sample automatic quantitative mixer for detecting dissolved gas in oil on-line monitoring device and standard oil sample configuration method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011293144.2A CN112461637A (en) | 2020-11-18 | 2020-11-18 | Standard oil sample automatic quantitative mixer for detecting dissolved gas in oil on-line monitoring device and standard oil sample configuration method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112857947A (en) * | 2021-04-06 | 2021-05-28 | 中国烟草总公司郑州烟草研究院 | Method for generating aerosol of cigarette smoke heated by standard concentration, temperature and pressure |
| CN115014868A (en) * | 2022-05-06 | 2022-09-06 | 国网江苏省电力有限公司电力科学研究院 | Single-port oil taking system and method for online monitoring of transformer oil |
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