CN112857907A - Vacuum degassing system and degassing method for dissolved gas in insulating liquid - Google Patents
Vacuum degassing system and degassing method for dissolved gas in insulating liquid Download PDFInfo
- Publication number
- CN112857907A CN112857907A CN202110341414.0A CN202110341414A CN112857907A CN 112857907 A CN112857907 A CN 112857907A CN 202110341414 A CN202110341414 A CN 202110341414A CN 112857907 A CN112857907 A CN 112857907A
- Authority
- CN
- China
- Prior art keywords
- oil
- degassing
- electromagnetic valve
- insulating
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007872 degassing Methods 0.000 title claims abstract description 200
- 239000007788 liquid Substances 0.000 title claims abstract description 66
- 238000009849 vacuum degassing Methods 0.000 title claims abstract description 32
- 239000003921 oil Substances 0.000 claims abstract description 228
- 239000010724 circulating oil Substances 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims description 17
- 238000007599 discharging Methods 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims 14
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 4
- 239000003595 mist Substances 0.000 description 2
- 238000004867 photoacoustic spectroscopy Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Degasification And Air Bubble Elimination (AREA)
Abstract
The application discloses dissolved gas vacuum degassing system and degassing method in insulating liquid, through the downward displacement of drive piston, can produce the degassing chamber in certain space in the degasification jar and for insulating oil to pour into, simultaneously, after pouring into insulating oil, the drive piston continues down, can form the vacuum cavity of negative pressure state between the liquid level of insulating oil and the interior top surface of degassing chamber, carry out circulation flow through oil pump and circulating oil pipe with insulating oil again, and atomize the blowout to degassing chamber through atomizer, thereby deviate from the dissolved gas in the insulating oil fast, and improved degasification efficiency. Meanwhile, compared with the existing degassing system, large devices such as a vacuum pump and the like are not needed, the structural complexity and the structural volume are reduced, automatic control is realized by arranging a sensor, an upper computer and a plurality of electromagnetic valves, and simple operation can be realized.
Description
Technical Field
The application relates to the technical field of dissolved gas vacuum degassing, in particular to a dissolved gas vacuum degassing system and a degassing method in insulating liquid.
Background
The oil-gas separation method is a key and necessary premise for realizing rapid detection and accurate metering of dissolved gas.
At present, the oil-gas separation method can be divided into two methods in principle, one is a dissolution equilibrium method, and the other is a vacuum method. The vacuum method belongs to a complete degassing method, has high degassing efficiency, can realize a degassing rate of 95 percent, has the characteristics of stable and rapid degassing performance and the like, and is a research hotspot in recent years.
The Chinese patent with publication number CN108627601A discloses an oil spraying vacuum degassing device for on-line monitoring of oil chromatography and a using method thereof, the device comprises a degassing cylinder for degassing, the degassing cylinder is provided with an oil inlet for oil inlet and an oil return port for oil discharge, the device also comprises a vacuum pump for realizing negative pressure of the degassing cylinder and a circulating electromagnetic valve for realizing circulating oil, the oil inlet and the oil return port are connected through a pipeline provided with the circulating electromagnetic valve, and the oil inlet is connected with a spraying structure. When the device is used, the internal pressure of the de-air cylinder is pumped to a complete vacuum negative pressure state, then transformer oil is injected, multiple cycles are carried out, filtered gas is pumped, concentration detection work is completed, and finally an oil sample is recovered. However, in the degassing process, a vacuum pump is required to be used to realize a vacuum state, and the size is large and the operation is complicated due to the addition of a device such as a vacuum pump.
Also, for example, chinese patent publication No. CN104623930A discloses a degassing device for analyzing dissolved gas in oil based on photoacoustic spectroscopy, which comprises an oil cylinder, an air chamber, an oil chamber, and a photoacoustic cavity, and the characteristic gas separated by vacuum degassing can be transferred into the photoacoustic cavity for photoacoustic spectroscopy detection. The oil chamber, the air chamber and the photoacoustic cavity of the device are special cavity components, wherein the oil chamber adopts a double-hole bottom cover structure and can realize safe oil return by matching with a liquid level sensor. The device is provided with two symmetrical oil chambers, so that the functions of bidirectional oil return and oil path cleaning can be realized, single-point collection of oil samples can be avoided, and multi-point circulating collection of the oil samples can be realized. However, the structure is complicated and the operation is complicated.
Disclosure of Invention
The application provides a vacuum degassing system and a degassing method for dissolved gas in insulating liquid, which are used for solving the technical problems of complex structure, large volume and complex operation of the existing vacuum degassing system.
In view of the above, the first aspect of the present application provides a vacuum degassing system for dissolved gas in insulating liquid, comprising: the device comprises a degassing cylinder, a piston, a stepping motor, a screw rod, an oil pump, an upper computer, an oil taking port, a first electromagnetic valve, a second electromagnetic valve and a three-way joint;
the piston is arranged in the cylinder of the degassing cylinder and is abutted against the inner wall of the degassing cylinder, and a degassing chamber is formed by the top surface of the piston and the inner wall of the degassing cylinder;
the output end of the stepping motor is connected with the screw rod, and the screw rod is connected with the piston;
the top of the degassing cylinder is provided with a liquid level sensor, a pressure sensor and an atomizing nozzle which are communicated with the degassing chamber, the liquid level sensor and the pressure sensor are electrically connected with the input end of the upper computer, the output end of the upper computer is electrically connected with the stepping motor, the first electromagnetic valve and the second electromagnetic valve respectively, and the nozzle direction of the atomizing nozzle faces the degassing chamber;
the first end of the oil pump is communicated with the degassing chamber through an oil degassing pipe, the second end of the oil pump is connected with the first end of the three-way joint through a circulating oil pipe, the oil taking port is connected with the second end of the three-way joint through the circulating oil pipe, and the third end of the three-way joint is connected with the atomizing nozzle through the circulating oil pipe;
the first electromagnetic valve is arranged on the circulating oil pipe between the three-way joint and the oil pump;
the second electromagnetic valve is arranged on the circulating oil pipe between the three-way joint and the oil taking port.
Preferably, the outer wall of the de-air cylinder is wrapped with a temperature control film, and the temperature control film is electrically connected with the output end of the upper computer.
Preferably, the piston is provided with an oil through hole communicated with the degassing chamber, and the first end of the oil pump is connected with the oil through hole through the degassing pipe.
Preferably, the system further comprises an oil discharge port and a third electromagnetic valve, the second end of the oil pump is connected with the third electromagnetic valve through the circulating oil pipe, and the third electromagnetic valve is connected with the oil discharge port.
Preferably, a one-way valve is arranged on a circulating oil pipe between the three-way joint and the atomizing nozzle, and the flow direction of the one-way valve is that the three-way joint faces the atomizing nozzle.
Preferably, the top of the degassing cylinder is further provided with an exhaust pipe communicated with the degassing chamber, the exhaust pipe is provided with a fourth electromagnetic valve, and a filter is arranged at the joint of the exhaust pipe and the degassing chamber.
In another aspect, the present invention further provides a degassing method based on the vacuum degassing system for dissolved gas in insulating liquid, including the following steps:
opening a second electromagnetic valve, and injecting insulating oil into the degassing chamber through the oil taking port;
when the liquid level sensor collects that the liquid level of the insulating oil in the degassing chamber reaches the top, a first control signal is sent to an upper computer, the second electromagnetic valve is closed through the upper computer according to the first control signal, and then a piston is driven by a stepping motor to move downwards to a preset position so as to form a vacuum cavity in a negative pressure state between the liquid level of the insulating oil and the inner top wall of the degassing chamber;
when the stepping motor drives the piston to move downwards to the preset distance, a first electromagnetic valve is opened, and the insulating oil in the degassing chamber is pumped to the atomizing nozzle through an oil pump to be atomized and sprayed into the degassing chamber;
collecting the air pressure in the degassing chamber through a pressure sensor, and judging that the insulating oil is sufficiently degassed when the air pressure collected by the pressure sensor is kept unchanged;
when the insulating oil is judged to be fully degassed, a degassing finishing signal is sent to the upper computer through the pressure sensor, and the oil valve and the first electromagnetic valve are closed through the upper computer.
Preferably, the vacuum degassing system for the dissolved gas in the insulating liquid further comprises an oil discharge port and a third electromagnetic valve, the second end of the oil pump is connected with the third electromagnetic valve through a circulating oil pipe, the third electromagnetic valve is connected with the oil discharge port, the top of the degassing cylinder is further provided with an exhaust pipe communicated with the degassing chamber, and the exhaust pipe is provided with a fourth electromagnetic valve; the step of opening the second electromagnetic valve and filling the degassing chamber with the preset oil volume with insulating oil through the oil taking port further comprises the following steps of:
driving the piston to displace to the bottom of the degassing cylinder through the stepping motor so as to enable the volume in the degassing chamber to reach the maximum value;
the second electromagnetic valve is opened, the degassing chamber is filled with the insulating oil through the oil taking port, when the liquid level sensor collects that the liquid level of the insulating oil in the degassing chamber reaches the top, a second control signal is sent to the upper computer, the second electromagnetic valve is closed through the upper computer according to the second control signal, then the first electromagnetic valve and the oil pump are opened, and therefore the insulating oil in the degassing chamber is pumped into the degassing chamber through the circulating oil pipe through the oil pump, and residual oil and residual gas in the circulating oil pipe are discharged into the degassing chamber;
after the residual oil and the residual gas in the circulating oil pipe are discharged into the degassing chamber, closing the oil pump and the first electromagnetic valve, then opening a fourth electromagnetic valve, driving the piston to move upwards relative to the degassing cylinder through the stepping motor so as to gradually reduce the volume in the degassing chamber, and discharging the residual gas through an exhaust pipe;
when level sensor gathers in the degasification chamber when the liquid level of insulating oil reaches the top, send third control signal to the host computer, through the host computer basis according to the third control signal closes the fourth solenoid valve, opens the third solenoid valve with the oil pump, through the oil pump will in the degasification chamber insulating oil pump send extremely the oil drain, thereby will insulating oil is whole to be discharged.
Preferably, when it is determined that the insulating oil is sufficiently degassed, a degassing completion signal is sent to the upper computer through the pressure sensor, and a degassing process is further included after the step of closing the oil valve and the first electromagnetic valve through the upper computer, and the degassing process specifically includes:
the piston is driven to move upwards relative to the degassing cylinder through the stepping motor, when the pressure in the degassing chamber reaches a standard atmospheric pressure collected by a pressure sensor, the fourth electromagnetic valve is opened, the piston is driven to move upwards relative to the degassing cylinder to the top through the stepping motor, and therefore the gas in the degassing chamber is discharged through the exhaust pipe;
when the liquid level sensor collects that the liquid level of the insulating oil in the degassing chamber reaches the top, a fourth control signal is sent to the upper computer, and the fourth electromagnetic valve is closed through the upper computer according to the fourth control signal.
Preferably, the exhaust process is followed by an oil discharge process, which specifically includes:
and opening the third electromagnetic valve and the oil pump, pumping the insulating oil in the degassing chamber to the oil discharge port through the oil pump, and discharging all the insulating oil.
According to the technical scheme, the embodiment of the application has the following advantages:
according to the vacuum degassing system for the dissolved gas in the insulating liquid, provided by the invention, the piston is driven to move downwards, the degassing chamber with a certain space can be generated in the degassing cylinder for injecting the insulating oil, meanwhile, after the insulating oil is injected, the piston is driven to continuously move downwards, a vacuum cavity in a negative pressure state can be formed between the liquid level of the insulating oil and the inner top surface of the degassing chamber, the insulating oil circularly flows through the oil pump and the circulating oil pipe, and is atomized and sprayed out to the degassing chamber through the atomizing nozzle, so that the dissolved gas in the insulating oil is rapidly removed, and the degassing efficiency is improved. Meanwhile, compared with the existing degassing system, large devices such as a vacuum pump and the like are not needed, the structural complexity and the structural volume are reduced, automatic control is realized by arranging a sensor, an upper computer and a plurality of electromagnetic valves, and simple operation can be realized. The degassing method of the vacuum degassing system for the dissolved gas in the insulating liquid provided by the invention is consistent with the beneficial effects, and is not repeated herein.
Drawings
Fig. 1 is a schematic structural diagram of a vacuum degassing system for dissolved gas in an insulating liquid according to an embodiment of the present disclosure;
fig. 2 is a flowchart of a degassing method of a vacuum degassing system for dissolved gas in insulating liquid according to an embodiment of the present disclosure.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, unless otherwise explicitly stated or limited. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.
For convenience of understanding, referring to fig. 1, the present invention provides a vacuum degassing system for dissolved gas in an insulating liquid, comprising: the device comprises a degassing cylinder 10, a piston 110, a stepping motor 120, a screw rod 121, an oil pump 20, an upper computer, an oil taking port 30, a first electromagnetic valve 210, a second electromagnetic valve 310 and a three-way joint 40;
the piston 110 is arranged in the cylinder of the degassing cylinder 10 and is abutted against the inner wall of the degassing cylinder 10, and the top surface of the piston 110 and the inner wall of the degassing cylinder 10 form a degassing chamber 112;
the output end of the stepping motor 120 is connected with a screw rod 121, and the screw rod 121 is connected with the piston 110;
in one embodiment, the stepping motor 120 is a through-shaft linear stepping motor, the degassing cylinder 10 is vertically disposed, and the stepping motor 120 is disposed at the bottom of the degassing cylinder 10 and connected to the bottom of the piston 110 through a screw rod 121, so as to control the piston 110 to reciprocate up and down relative to the degassing cylinder 10.
The top of the degassing cylinder 10 is provided with a liquid level sensor 113, a pressure sensor 114 and an atomizing nozzle 115 which are communicated with the degassing chamber 112, the liquid level sensor 113 and the pressure sensor 114 are both electrically connected with the input end of an upper computer, the output end of the upper computer is respectively electrically connected with the stepping motor 120, the first electromagnetic valve 210 and the second electromagnetic valve 310, and the nozzle direction of the atomizing nozzle 115 is arranged towards the degassing chamber 112;
a first end of the oil pump 20 is communicated with the degassing chamber 112 through an oil degassing pipe 117, a second end of the oil pump 20 is connected with a first end of the three-way joint 40 through a circulating oil pipe, the oil taking port 30 is connected with a second end of the three-way joint 40 through a circulating oil pipe, and a third end of the three-way joint 40 is connected with the atomizing nozzle 115 through a circulating oil pipe;
it can be understood that the atomizer 115 can atomize the insulating oil, enlarge the contact surface of the insulating oil, facilitate the gas in the oil to be separated out, and increase the degassing efficiency.
In one embodiment, as shown in fig. 1, the piston 110 is provided with an oil through hole 111 communicating with the degassing chamber 112, the first end of the oil pump 20 is connected to the oil through hole 111 through a degassing pipe 117, and the degassing pipe 117 is a flexible oil pipe, so that the degassing pipe 117 is not damaged when the piston 110 reciprocates up and down.
The first electromagnetic valve 210 is arranged on the circulating oil pipe between the three-way joint 40 and the oil pump 20;
the second solenoid valve 310 is provided on the circulation oil pipe between the three-way joint 40 and the oil take-out port 30.
In one embodiment, a filtering device 311 is further disposed on the circulation oil pipe between the second solenoid valve 310 and the oil taking port 30 to filter the insulating oil to be degassed.
It should be noted that the working process of this embodiment is as follows:
1) opening a second electromagnetic valve 310, and injecting insulating oil into the degassing chamber 112 through the oil taking port 30, wherein the insulating oil comes from equipment such as a transformer and a reactor;
2) when the liquid level sensor 113 collects that the liquid level of the insulating oil in the degassing chamber 112 reaches the top, a first control signal is sent to the upper computer, the second electromagnetic valve 310 is closed through the upper computer according to the first control signal, and then the piston 110 is driven by the stepping motor 120 to move downwards to a preset position, so that a vacuum cavity in a negative pressure state is formed between the liquid level of the insulating oil and the inner top wall of the degassing chamber 112;
3) when the stepping motor 120 drives the piston 110 to move downwards to a preset distance, the first electromagnetic valve 210 is opened, and the insulating oil in the degassing chamber 112 is pumped to the atomizing nozzle 115 through the oil pump 20 to be atomized and sprayed into the degassing chamber 112;
4) collecting the air pressure in the degassing chamber 112 by the pressure sensor 114, and when the air pressure collected by the pressure sensor 114 is kept unchanged, judging that the insulating oil is sufficiently degassed;
5) when it is determined that the insulating oil is sufficiently degassed, a degassing completion signal is sent to the upper computer through the pressure sensor 114, and the oil valve and the first electromagnetic valve 210 are closed through the upper computer.
It can be understood that, in the present embodiment, by driving the piston 110 to displace downward, a degassing chamber 112 with a certain space is created in the degassing cylinder 10 for injecting the insulating oil, and at the same time, after injecting the insulating oil, the driving piston 110 continues to move downward, so that a vacuum cavity with a negative pressure state can be formed between the liquid level of the insulating oil and the inner top surface of the degassing chamber 112, and then the insulating oil is circulated by the oil pump 20 and the circulation oil pipe, and atomized and ejected to the degassing chamber 112 by the atomizing nozzle 115, so that the dissolved gas in the insulating oil is rapidly removed, and the degassing efficiency is improved. Meanwhile, compared with the existing degassing system, large devices such as a vacuum pump and the like are not needed, the structural complexity and the structural volume are reduced, automatic control is realized by arranging a sensor, an upper computer and a plurality of electromagnetic valves, and simple operation can be realized.
As a preferable scheme of this embodiment, the outer wall of the degassing cylinder 10 is wrapped with a temperature control film 116, and the temperature control film 116 is electrically connected with the output end of the upper computer.
In the degassing process, the temperature in the degassing cylinder 10 is controlled to be kept at 30-80 ℃ by the temperature control film 116.
As a preferable solution of this embodiment, the system further includes an oil discharge port 50 and a third electromagnetic valve 510, the second end of the oil pump 20 is connected to the third electromagnetic valve 510 through a circulation oil pipe, and the third electromagnetic valve 510 is connected to the oil discharge port 50.
It is understood that after the third solenoid valve 510 and the oil pump 20 are opened, the insulating oil in the degassing chamber 112 is pumped to the oil discharge port 50 by the oil pump 20, so that the insulating oil can be discharged.
As a preferable scheme of this embodiment, a check valve 410 is provided on the circulation oil pipe between the three-way joint 40 and the atomizer 115, and the flow direction of the check valve 410 is such that the three-way joint 40 is disposed toward the atomizer 115.
Preferably, the degassing cylinder 10 is further provided with a vent pipe 60 at the top thereof, the vent pipe 60 is communicated with the degassing chamber 112, the vent pipe 60 is provided with a fourth solenoid valve 610, and a filter 611 is provided at the connection between the vent pipe 60 and the degassing chamber 112.
It should be noted that the filter 611 can filter oil mist particles when the gas is exhausted, so as to prevent oil mist from contaminating the air passage of the exhaust pipe 60, and meanwhile, the exhaust pipe 60 is made of a capillary tube.
After the fourth solenoid valve 610 is opened, the gas in the degassing chamber 112 may be exhausted through the exhaust pipe 60. Wherein, the outside of the exhaust pipe 60 can be connected with an atmosphere or gas detection device.
The above is a detailed description of an embodiment of a vacuum degassing system for dissolved gas in insulating liquid provided by the present invention, and the following is a detailed description of an embodiment of a degassing method for a vacuum degassing system for dissolved gas in insulating liquid provided based on the above embodiment.
For convenience of understanding, referring to fig. 2, the present invention provides a degassing method of a vacuum degassing system for dissolved gas in insulating liquid, comprising the following steps:
s101: opening a second electromagnetic valve, and injecting insulating oil into the degassing chamber through the oil taking port;
it will be appreciated that the volume of the degassing chamber may be predetermined.
S102: when the liquid level sensor collects that the liquid level of the insulating oil in the degassing chamber reaches the top, a first control signal is sent to the upper computer, the second electromagnetic valve is closed through the upper computer according to the first control signal, and then the piston is driven by the stepping motor to move downwards to a preset position so as to form a vacuum cavity in a negative pressure state between the liquid level of the insulating oil and the inner top wall of the degassing chamber;
s103: when the stepping motor drives the piston to move downwards to a preset distance, the first electromagnetic valve is opened, and the insulating oil in the degassing chamber is pumped to the atomizing nozzle through the oil pump to be atomized and sprayed into the degassing chamber;
s104: collecting the air pressure in the degassing chamber through a pressure sensor, and judging that the insulating oil is fully degassed when the air pressure collected by the pressure sensor is kept unchanged;
s105: when the insulating oil is judged to be fully degassed, a degassing finishing signal is sent to the upper computer through the pressure sensor, and the oil valve and the first electromagnetic valve are closed through the upper computer.
As a preferable scheme of this embodiment, the vacuum degassing system for dissolved gas in insulating liquid further includes an oil discharge port and a third electromagnetic valve, the second end of the oil pump is connected to the third electromagnetic valve through a circulating oil pipe, the third electromagnetic valve is connected to the oil discharge port, the top of the degassing cylinder is further provided with an exhaust pipe communicated with the degassing chamber, and the exhaust pipe is provided with a fourth electromagnetic valve; before step S101, the method further includes:
s1011: the piston is driven to move to the bottom of the degassing cylinder through the stepping motor, so that the volume in the degassing chamber reaches the maximum value;
s1012: opening a second electromagnetic valve, filling the degassing chamber with insulating oil through an oil taking port, sending a second control signal to an upper computer when a liquid level sensor collects that the liquid level of the insulating oil in the degassing chamber reaches the top, closing the second electromagnetic valve according to the second control signal through the upper computer, and then opening a first electromagnetic valve and an oil pump, so that the insulating oil in the degassing chamber is pumped into the degassing chamber through a circulating oil pipe through the oil pump, and residual oil and residual gas in the circulating oil pipe are discharged into the degassing chamber;
s1013: after residual oil and residual gas in the circulating oil pipe are discharged into the degassing chamber, closing the oil pump and the first electromagnetic valve, then opening the fourth electromagnetic valve, driving the piston to move upwards relative to the degassing cylinder through the stepping motor so as to gradually reduce the volume in the degassing chamber, and discharging the residual gas through the exhaust pipe;
s1014: when the liquid level sensor collects that the liquid level of the insulating oil in the degassing chamber reaches the top, a third control signal is sent to the upper computer, the fourth electromagnetic valve is closed through the upper computer according to the third control signal, the third electromagnetic valve and the oil pump are opened, the insulating oil in the degassing chamber is pumped to the oil discharge port through the oil pump, and therefore the insulating oil is completely discharged.
It will be appreciated that the removal of residual oil and residual gas from the oil pipe before degassing begins provides a degassing efficiency.
As a preferable scheme of this embodiment, after step S105, an exhaust process is further included, and the exhaust process specifically includes:
s106: the piston is driven to move upwards relative to the degassing cylinder through the stepping motor, when the pressure in the degassing chamber collected by the pressure sensor reaches a standard atmospheric pressure, the fourth electromagnetic valve is opened, the piston is driven to move upwards relative to the degassing cylinder through the stepping motor, and the gas in the degassing chamber is discharged through the exhaust pipe;
s107: when the liquid level sensor collects that the liquid level of the insulating oil in the degassing chamber reaches the top, a fourth control signal is sent to the upper computer, and the fourth electromagnetic valve is closed through the upper computer according to the fourth control signal.
As a preferable scheme of this embodiment, the exhaust process includes an oil discharge process, and the oil discharge process specifically includes:
s108: and opening the third electromagnetic valve and the oil pump, pumping the insulating oil in the degassing chamber to the oil discharge port through the oil pump, and discharging all the insulating oil.
It will be appreciated that the present embodiment is based on the vacuum degassing system for dissolved gas in insulating liquid in the above embodiment, and the operation is simple, and at the same time, the degassing efficiency is increased.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A vacuum degassing system for dissolved gases in an insulating liquid, comprising: the device comprises a degassing cylinder, a piston, a stepping motor, a screw rod, an oil pump, an upper computer, an oil taking port, a first electromagnetic valve, a second electromagnetic valve and a three-way joint;
the piston is arranged in the cylinder of the degassing cylinder and is abutted against the inner wall of the degassing cylinder, and a degassing chamber is formed by the top surface of the piston and the inner wall of the degassing cylinder;
the output end of the stepping motor is connected with the screw rod, and the screw rod is connected with the piston;
the top of the degassing cylinder is provided with a liquid level sensor, a pressure sensor and an atomizing nozzle which are communicated with the degassing chamber, the liquid level sensor and the pressure sensor are electrically connected with the input end of the upper computer, the output end of the upper computer is electrically connected with the stepping motor, the first electromagnetic valve and the second electromagnetic valve respectively, and the nozzle direction of the atomizing nozzle faces the degassing chamber;
the first end of the oil pump is communicated with the degassing chamber through an oil degassing pipe, the second end of the oil pump is connected with the first end of the three-way joint through a circulating oil pipe, the oil taking port is connected with the second end of the three-way joint through the circulating oil pipe, and the third end of the three-way joint is connected with the atomizing nozzle through the circulating oil pipe;
the first electromagnetic valve is arranged on the circulating oil pipe between the three-way joint and the oil pump;
the second electromagnetic valve is arranged on the circulating oil pipe between the three-way joint and the oil taking port.
2. The vacuum degassing system for dissolved gases in insulating liquids according to claim 1, wherein the outer wall of said degassing cylinder is wrapped with a temperature control film, said temperature control film being electrically connected to the output end of said upper computer.
3. The vacuum degassing system for dissolved gases in insulating liquids according to claim 1, wherein said piston is provided with an oil through hole communicating with said degassing chamber, and said first end of said oil pump is connected to said oil through said degassing pipe.
4. The vacuum degassing system for dissolved gases in insulating liquids according to claim 1, further comprising an oil drain and a third solenoid valve, wherein the second end of said oil pump is connected to said third solenoid valve through said circulation oil pipe, and said third solenoid valve is connected to said oil drain.
5. The vacuum degassing system for dissolved gases in insulating liquids according to claim 1, wherein a check valve is disposed on the circulation oil pipe between said tee joint and said atomizer, and the flow direction of said check valve is such that said tee joint is disposed toward said atomizer.
6. The vacuum degassing system for dissolved gases in insulating liquids according to claim 1, wherein the degassing cylinder is further provided at the top with an exhaust pipe communicating with the degassing chamber, the exhaust pipe is provided with a fourth solenoid valve, and a filter is provided at the connection of the exhaust pipe and the degassing chamber.
7. A degassing method based on a vacuum degassing system for dissolved gases in insulating liquids according to claim 1, characterized in that it comprises the following steps:
opening a second electromagnetic valve, and injecting insulating oil into the degassing chamber through the oil taking port;
when the liquid level sensor collects that the liquid level of the insulating oil in the degassing chamber reaches the top, a first control signal is sent to an upper computer, the second electromagnetic valve is closed through the upper computer according to the first control signal, and then a piston is driven by a stepping motor to move downwards to a preset position so as to form a vacuum cavity in a negative pressure state between the liquid level of the insulating oil and the inner top wall of the degassing chamber;
when the stepping motor drives the piston to move downwards to the preset distance, a first electromagnetic valve is opened, and the insulating oil in the degassing chamber is pumped to the atomizing nozzle through an oil pump to be atomized and sprayed into the degassing chamber;
collecting the air pressure in the degassing chamber through a pressure sensor, and judging that the insulating oil is sufficiently degassed when the air pressure collected by the pressure sensor is kept unchanged;
when the insulating oil is judged to be fully degassed, a degassing finishing signal is sent to the upper computer through the pressure sensor, and the oil valve and the first electromagnetic valve are closed through the upper computer.
8. The degassing method of a vacuum degassing system for dissolved gases in insulating liquid according to claim 7, further comprising an oil discharge port and a third electromagnetic valve, wherein the second end of the oil pump is connected with the third electromagnetic valve through a circulating oil pipe, the third electromagnetic valve is connected with the oil discharge port, the top of the degassing cylinder is further provided with an exhaust pipe communicated with the degassing chamber, and the exhaust pipe is provided with a fourth electromagnetic valve; the method is characterized in that the step of opening the second electromagnetic valve and filling insulating oil into the degassing chamber with the preset oil volume through the oil taking port further comprises the following steps of:
driving the piston to displace to the bottom of the degassing cylinder through the stepping motor so as to enable the volume in the degassing chamber to reach the maximum value;
the second electromagnetic valve is opened, the degassing chamber is filled with the insulating oil through the oil taking port, when the liquid level sensor collects that the liquid level of the insulating oil in the degassing chamber reaches the top, a second control signal is sent to the upper computer, the second electromagnetic valve is closed through the upper computer according to the second control signal, then the first electromagnetic valve and the oil pump are opened, and therefore the insulating oil in the degassing chamber is pumped into the degassing chamber through the circulating oil pipe through the oil pump, and residual oil and residual gas in the circulating oil pipe are discharged into the degassing chamber;
after the residual oil and the residual gas in the circulating oil pipe are discharged into the degassing chamber, closing the oil pump and the first electromagnetic valve, then opening a fourth electromagnetic valve, driving the piston to move upwards relative to the degassing cylinder through the stepping motor so as to gradually reduce the volume in the degassing chamber, and discharging the residual gas through an exhaust pipe;
when level sensor gathers in the degasification chamber when the liquid level of insulating oil reaches the top, send third control signal to the host computer, through the host computer basis according to the third control signal closes the fourth solenoid valve, opens the third solenoid valve with the oil pump, through the oil pump will in the degasification chamber insulating oil pump send extremely the oil drain, thereby will insulating oil is whole to be discharged.
9. The degassing method of the vacuum degassing system for the dissolved gas in the insulating liquid according to claim 8, wherein when it is determined that the insulating oil is sufficiently degassed, a degassing completion signal is sent to the upper computer through the pressure sensor, and a degassing process is further included after the step of closing the oil valve and the first electromagnetic valve through the upper computer, and the degassing process specifically includes:
the piston is driven to move upwards relative to the degassing cylinder through the stepping motor, when the pressure in the degassing chamber reaches a standard atmospheric pressure collected by a pressure sensor, the fourth electromagnetic valve is opened, the piston is driven to move upwards relative to the degassing cylinder to the top through the stepping motor, and therefore the gas in the degassing chamber is discharged through the exhaust pipe;
when the liquid level sensor collects that the liquid level of the insulating oil in the degassing chamber reaches the top, a fourth control signal is sent to the upper computer, and the fourth electromagnetic valve is closed through the upper computer according to the fourth control signal.
10. The degassing method for a vacuum degassing system of dissolved gases in insulating liquids according to claim 9, characterized in that said degassing process is followed by an oil discharge process, said oil discharge process comprising in particular:
and opening the third electromagnetic valve and the oil pump, pumping the insulating oil in the degassing chamber to the oil discharge port through the oil pump, and discharging all the insulating oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110341414.0A CN112857907A (en) | 2021-03-30 | 2021-03-30 | Vacuum degassing system and degassing method for dissolved gas in insulating liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110341414.0A CN112857907A (en) | 2021-03-30 | 2021-03-30 | Vacuum degassing system and degassing method for dissolved gas in insulating liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112857907A true CN112857907A (en) | 2021-05-28 |
Family
ID=75993248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110341414.0A Pending CN112857907A (en) | 2021-03-30 | 2021-03-30 | Vacuum degassing system and degassing method for dissolved gas in insulating liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112857907A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113567223A (en) * | 2021-07-29 | 2021-10-29 | 湖南五凌电力科技有限公司 | Constant-temperature negative-pressure dynamic headspace oil-gas separation device and method |
| CN115316126A (en) * | 2022-08-02 | 2022-11-11 | 华南农业大学 | Device is picked to shaddock |
| CN116550014A (en) * | 2023-07-10 | 2023-08-08 | 广东电网有限责任公司佛山供电局 | Oil-gas separation device |
-
2021
- 2021-03-30 CN CN202110341414.0A patent/CN112857907A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113567223A (en) * | 2021-07-29 | 2021-10-29 | 湖南五凌电力科技有限公司 | Constant-temperature negative-pressure dynamic headspace oil-gas separation device and method |
| CN115316126A (en) * | 2022-08-02 | 2022-11-11 | 华南农业大学 | Device is picked to shaddock |
| CN116550014A (en) * | 2023-07-10 | 2023-08-08 | 广东电网有限责任公司佛山供电局 | Oil-gas separation device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112857907A (en) | Vacuum degassing system and degassing method for dissolved gas in insulating liquid | |
| CN102371085B (en) | For the vacuum oil air separation of transformer online monitoring | |
| CN208109479U (en) | A kind of micro quantitative determination sampling system | |
| CN109358189A (en) | A kind of biochip and its micro quantitative determination sampling method | |
| CN101059403A (en) | Minimum gas high precision collection device and its usage method | |
| CN114518260B (en) | Oilfield crude oil sampler adopting constant pressure | |
| CN214584279U (en) | Vacuum degassing system for dissolved gas in insulating liquid | |
| CN113534543A (en) | Crystal filling system and crystal filling method | |
| WO2020063795A1 (en) | Biochip, micro liquid sample loading structure thereof, and micro quantitative sampling method | |
| CN220010810U (en) | Pouring sealant storage device | |
| CN214597504U (en) | Sediment gap water filtering device | |
| CN113140345B (en) | Integrated Po removal and oxygen control device and Po removal method | |
| CN102049397A (en) | Method and device for cleaning capillary of automatic sampler | |
| CN214171959U (en) | Multiphase flow mixing and conveying device | |
| CN201293740Y (en) | High precision gathering apparatus for trace quantity gas | |
| CN212924375U (en) | Automatic quantitative filling device of beverage | |
| CN210487374U (en) | Vacuum sampler for sampling purified water | |
| CN106769244A (en) | Underground water dissolved gas on-site sampler | |
| CN220309798U (en) | Vacuum degassing device | |
| CN102008897A (en) | Continuous negative pressure pulse cleaning method | |
| CN206027640U (en) | Organic solvent from taking evacuating device extracts mechanism | |
| CN220090567U (en) | Liquid separator | |
| CN215677708U (en) | Pneumatic type divides liquid sampling device | |
| CN213382551U (en) | Two room vacuum forming machine cooling system | |
| CN101075668A (en) | Filling syringe for battery and battery injector therewith |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |