CN211347908U - Transformer oil gas monitoring system based on semiconductor laser - Google Patents
Transformer oil gas monitoring system based on semiconductor laser Download PDFInfo
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- CN211347908U CN211347908U CN201921680424.1U CN201921680424U CN211347908U CN 211347908 U CN211347908 U CN 211347908U CN 201921680424 U CN201921680424 U CN 201921680424U CN 211347908 U CN211347908 U CN 211347908U
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Abstract
The utility model relates to a transformer oil gas monitoring system based on a semiconductor laser, which is used for detecting the insulating oil of an oil-immersed transformer and comprises a shell, an oil gas separation device, a photoacoustic spectrum detection device, a control display device and a power supply conversion module; the oil-gas separation device is arranged at the bottom of the shell; the photoacoustic spectrum detection device is arranged above the oil-gas separation device and is fixedly arranged on the side wall of the shell; the control display device is fixedly arranged on the front panel of the shell; the power supply conversion module is arranged close to the photoacoustic spectrum detection device and is fixedly arranged on the side wall of the shell; the monitoring system adopts the tunable semiconductor laser as a light source, and the tunable wavelength band is wide, so that the requirement of oil gas monitoring of the transformer can be met; and the structure for prolonging the optical path is added in the photoacoustic cell, so that the gas to be detected is repeatedly irradiated by laser, the photoacoustic effect is enhanced, the detection result is more accurate, the size of the photoacoustic cell is reduced, and the equipment cost is saved.
Description
Technical Field
The utility model relates to a power supply and transformation technical field, concretely relates to transformer oil gas monitoring system based on semiconductor laser.
Background
The oil-filled power transformer is mainly insulated by oil paper, in the process of discharging and overheating operation, the oil and the paper are cracked to generate various gases such as C2H2, CO2, H2, CH4, C2H4 and C2H6, the gases are partially dissolved in the oil, and the components and the proportion of the dissolved gases in the oil are analyzed, so that the latent faults and types of the transformer can be judged.
At present, the following problems are exposed when an oil chromatographic analysis method is adopted for monitoring: the detection precision is low, and false alarm or alarm missing frequently occurs; the replacement frequency of the carrier gas is high, the maintenance amount is large, and the use cost is high. This has made the use of photoacoustic spectroscopy to monitor gases increasingly popular. The photoacoustic spectroscopy technology utilizes the photoacoustic effect, which is a periodic non-radiative relaxation process caused by the absorption of intermittent light energy by gas molecules, and macroscopically represents the periodic change of gas pressure, and the pressure fluctuation becomes acoustic waves, so that the acoustic waves can be sensed by the acoustic sensor. When the existing equipment adopts the photoacoustic spectroscopy technology to detect the transformer oil gas, only one representative gas is usually detected, the detection result can only be used as reference for the component and proportion analysis of the transformer oil gas, and the integrity of the detection data is still to be improved; meanwhile, due to the limitation of the volume of the monitoring equipment, the problem that the optical path of the photoacoustic cell is too short, and the generated acoustic wave signal is too weak exists. The existing device increases the length of the photoacoustic cell in order to increase the optical path, has the problems of larger volume and more occupied space of the monitoring device,
SUMMERY OF THE UTILITY MODEL
The utility model provides a transformer oil gas monitoring system based on semiconductor laser aiming at the technical problems existing in the prior art, which adopts the tunable semiconductor laser as the light source, the tunable wavelength frequency is wide, and the requirement of transformer oil gas monitoring can be met; and the structure for prolonging the optical path is added in the photoacoustic cell, so that the gas to be detected is repeatedly irradiated by laser, larger gas pressure change is generated, the photoacoustic effect is enhanced, and the detection result is more accurate.
The utility model provides an above-mentioned technical problem's technical scheme as follows: the transformer oil-gas monitoring system based on the semiconductor laser is used for detecting insulating oil of an oil-immersed transformer and comprises a shell, an oil-gas separation device, a photoacoustic spectrum detection device, a control display device and a power supply conversion module, wherein the oil-gas separation device, the photoacoustic spectrum detection device, the control display device and the power supply conversion module are arranged in the shell; the oil-gas separation device is arranged at the bottom of the shell; the photoacoustic spectrum detection device is arranged above the oil-gas separation device and is fixedly arranged on the side wall of the shell; the shell comprises a front panel, and the control display device is fixedly arranged on the front panel; the power supply conversion module is arranged close to the photoacoustic spectrum detection device and is fixedly arranged on the side wall of the shell; wherein the content of the first and second substances,
the oil-gas separation device comprises an oil inlet, an oil outlet and an air outlet, the oil inlet and the oil outlet are respectively communicated with an oil tank of the transformer, and the air outlet is communicated with the photoacoustic spectrum detection device;
the photoacoustic spectrum detection device comprises a photoacoustic cell and a photoacoustic signal conversion module, the photoacoustic cell is hermetically connected with the oil-gas separation device, a tunable light source is arranged in the photoacoustic cell, the tunable light source is in signal connection with the control display device, and the tunable light source has a broadband tuning range; the signal acquisition end of the photoacoustic signal conversion module is arranged in the photoacoustic cell, and the photoacoustic signal conversion module is in signal connection with the control display device;
the input end of the power supply conversion module is connected with an external power supply, the power supply conversion module is provided with multiple paths of power supply outputs, and the multiple paths of power supply outputs are respectively connected with the oil-gas separation device, the photoacoustic spectrum detection device and the control display device and are used for providing power for the detection device.
The utility model has the advantages that: the utility model discloses a monitoring system adopts oil-gas separation device to carry out gas-liquid separation with transformer insulating oil, and in the oil flowed back to the transformer, gaseous entering optoacoustic pond detected, and the gas after the detection sneakes into the transformer that flows back in the oil again. The detection process does not need a gas carrying bottle, so that the occupied space of the device is saved, the gas to be detected is not consumed, and the oil gas component of the transformer is not interfered. The light source adopts a tunable light source capable of modulating light source outputs with different wavelengths, the wavelength which can be modulated by the light source corresponds to various gas components dissolved in the transformer oil, and the contents of the gases with different components can be sequentially detected by switching the light sources with different wavelengths, so that the proportion of various gases can be obtained. Compared with the existing detection device, the detection device has more complete and accurate detection result; compact structure, reasonable arrangement and realization of miniaturization of equipment.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the oil-gas separation device comprises an oil-gas separation cavity, the oil-gas separation cavity is provided with an oil inlet, an oil outlet and a gas outlet, the oil inlet is provided with an oil inlet pump, the oil outlet is provided with an oil outlet pump, the gas outlet is provided with a vacuum pump, and the oil inlet pump, the oil outlet pump and the vacuum pump are respectively in signal connection with the control display device. The vacuum pump is used for vacuumizing the oil-gas separation cavity, so that the dissolution rate of gas in the insulating oil is reduced, the insulating oil is separated from the gas more efficiently, and meanwhile, the separated gas is pumped out and sent into the photoacoustic cell, so that the gas-liquid separation efficiency is greatly improved. The oil inlet pump provides power for the monitoring system to pump the insulating oil in the transformer oil tank, and the oil outlet pump provides power for the oil gas remixed after detection to return to the transformer. The oil outlet is also provided with an electromagnetic valve which can be used for adjusting the flow speed and the flow of the insulating oil.
Further, the oil inlet is also provided with a liquid level valve, the liquid level valve is in signal connection with the control display device, the liquid level valve comprises a valve, a floating ball switch and a floating ball, the floating ball is arranged in the oil-gas separation cavity and floats along with the liquid level, the floating ball switch is installed on the upper portion of the oil-gas separation cavity, and the floating ball switch and the valve are in signal connection with the control display device.
Further, the photoacoustic cell is provided with an air inlet end and an air outlet end, the air inlet end of the photoacoustic cell is connected with the air outlet of the oil-gas separation device, the air outlet end of the photoacoustic cell is communicated with the oil outlet of the oil-gas separation device, the tunable light source is arranged at the air inlet end of the photoacoustic cell and is electrically connected with the power supply conversion module, and the tunable light source emits laser into the photoacoustic cell. The separated gas to be detected enters the photoacoustic cell from the gas inlet end, the light source emits laser to irradiate the gas to be detected, the gas absorbs optical energy to generate photoacoustic effect, and acoustic waves with the same period as the modulation frequency are generated for the detection device to detect.
Furthermore, at least one plane reflector is arranged in the photoacoustic cell and arranged at one end opposite to the tunable light source, and an acute angle is formed between the output light direction of the tunable light source and the reflecting surface of the plane reflector. The plane reflector reflects the laser emitted by the tunable light source out through an obtuse angle, so that the optical path in the photoacoustic cell is increased by more than one time, the photoacoustic effect is enhanced, and the detection accuracy is improved. Under the condition that the size of the photoacoustic cell allows, in order to further increase the optical path, a second plane mirror which is opposite and parallel to the first plane mirror, a third plane mirror … … which is opposite and parallel to the second plane mirror and the like can be arranged in the photoacoustic cell in sequence so as to meet the required photoacoustic signal intensity requirement.
Further, the tunable light source is a semiconductor laser, and the semiconductor laser has a broadband tuning range from near ultraviolet to near infrared. The wave band range comprises wave bands corresponding to gas components dissolved in transformer oil to be detected, and different wave bands of laser are modulated on the controller, so that the test requirements of different gas components are met.
Further, the control display device comprises an integrated touch screen and a controller, the touch screen is in signal connection with the controller, and the controller is in signal connection with the tunable light source and the photoacoustic signal conversion module respectively. The front panel of the shell is also provided with an opening, and the opening is matched with the touch screen. The touch screen is used for inputting data to the detection device and providing a man-machine interaction page, and the controller is used for controlling the operation of the whole device.
Further, the photoacoustic signal conversion module comprises a microphone, an amplifying and filtering circuit, an AD conversion circuit, a digital phase locking and filtering module which are sequentially connected through signals, the microphone penetrates through the wall of the photoacoustic cell, an induction head of the microphone is installed in the photoacoustic cell, and the output end of the digital phase locking and filtering module is connected with the controller through signals. The amplifying and filtering circuit, the AD conversion circuit and the digital phase locking and filtering module of the photoacoustic signal conversion module are integrated on the control display device and are arranged on the front panel of the shell together with the control display device. The microphone is used for receiving sound wave signals generated by gas in the photoacoustic cell, transmitting the sound wave signals to the amplifying and filtering circuit for signal amplification and noise filtering, then performing analog-to-digital conversion through the AD conversion circuit, performing digital signal processing through the digital phase locking and filtering module, and transmitting the signals to the control display device to convert the signals into pictures and texts for display. By controlling the display device, the user can visually observe the current detection data.
Further, the shell is further provided with a starting button switch and a stopping button switch, and the starting button switch and the stopping button switch are respectively in signal connection with the controller. After the monitoring system is powered on, the starting button switch is pressed, and the controller controls the monitoring system to start to extract insulating oil in the transformer oil tank for detection; when the detection is required to be stopped, the stop button switch is pressed, and the controller controls the monitoring system to stop running.
Furthermore, the shell is also provided with a power input interface, and the power input interface is electrically connected with the input end of the power conversion module. The power input interface is connected with an external power supply to provide a power source for the monitoring system. And a power switch with an indicator lamp is also arranged on the power input interface and used for controlling and indicating whether the monitoring system is electrified or not.
Drawings
Fig. 1 is a schematic block diagram of a system according to an embodiment of the present invention;
fig. 2 is a schematic external structural diagram according to an embodiment of the present invention;
fig. 3 is a schematic diagram (a) of the internal structure provided in the embodiment of the present invention;
fig. 4 is a schematic diagram (b) of the internal structure provided in the embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. oil-gas separation device, 101, vacuum pump, 102, oil inlet pump, 103, oil outlet pump, 104, liquid level valve, 1041, floating ball, 1042, floating ball switch, 105, oil-gas separation cavity, 106, electromagnetic valve, 2, photoacoustic spectrum detection device, 201, photoacoustic cell, 2011, plane reflector, 202, tunable light source, 203, photoacoustic signal conversion module, 2031, microphone, 2032, amplification filter circuit, 2033, AD conversion circuit, 2034, digital phase lock and filter module, 3, control display device, 301, start button switch, 302, stop button switch, 4, power conversion module, 401, power input interface, 5, housing, 501, foot, 502, support frame, 503, mounting panel.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
The transformer oil-gas monitoring system based on the semiconductor laser device shown in fig. 1-4 is used for detecting insulating oil of an oil-immersed transformer, and comprises a shell 5, and an oil-gas separation device 1, a photoacoustic spectrum detection device 2, a control display device 3 and a power supply conversion module 4 which are arranged in the shell 5; the bottom of the shell 5 is provided with a ground pin 501, and the device is fixedly arranged at a position to be detected through the ground pin 501. The oil-gas separation device 1 is arranged at the bottom in the shell 5 through a support frame 502, and the support frame 502 provides a gap between the oil-gas separation device 1 and the shell 5 and is used for placing a pipeline for connecting the oil-gas separation device 1 to the outside; the photoacoustic spectrum detection device 2 is arranged above the oil-gas separation device 1 and is fixedly arranged on the side wall of the shell 5 through a mounting plate 503 transversely arranged in the shell 5; the housing 5 comprises a front panel on which the control display device 3 is fixedly mounted; the power supply conversion module 4 is arranged close to the photoacoustic spectrum detection device 2 and is fixedly arranged on the side wall of the shell 5; wherein the content of the first and second substances,
the oil-gas separation device 1 comprises an oil inlet, an oil outlet and an air outlet, the oil inlet and the oil outlet are respectively communicated with an oil tank of the transformer, and the air outlet is communicated with the photoacoustic spectrum detection device 2;
the photoacoustic spectrum detection device 2 comprises a photoacoustic cell 201 and a photoacoustic signal conversion module 203, the photoacoustic cell is hermetically connected with the oil-gas separation device, a tunable light source 202 is arranged in the photoacoustic cell 201, the tunable light source 202 is in signal connection with the control display device 3, and the tunable light source 202 has a broadband tuning range; the signal acquisition end of the photoacoustic signal conversion module 203 is arranged in the photoacoustic cell 201, and the photoacoustic signal conversion module 203 is in signal connection with the control display device 3;
the input of power conversion module 4 is connected with external power source, power conversion module 4 is equipped with multichannel power output, the multichannel power output connects respectively oil-gas separation device 1 photoacoustic spectrum detection device 2 control display device 3 for provide the power for this detection device.
As shown in fig. 3 to 4, the oil-gas separation device 1 includes an oil-gas separation cavity 105, the oil-gas separation cavity 105 is provided with an oil inlet, an oil outlet, and an air outlet, the oil inlet is provided with an oil inlet pump 102, the oil outlet is provided with an oil outlet pump 103, the air outlet is provided with a vacuum pump 101, and the oil inlet pump 102, the oil outlet pump 103, and the vacuum pump 101 are respectively in signal connection with the control display device 3. The vacuum pump 101 is used for vacuumizing the oil-gas separation cavity 105, so that the dissolution rate of gas in the insulating oil is reduced, the insulating oil is separated from the gas more efficiently, and meanwhile, the separated gas is pumped out and sent into the photoacoustic cell 201, so that the gas-liquid separation efficiency is greatly improved. The oil inlet pump 102 provides power for the monitoring system to pump the insulating oil in the transformer oil tank, and the oil outlet pump 103 provides power for the oil gas remixed after detection to return to the transformer. The oil outlet is also provided with a solenoid valve 106 which can be used for adjusting the flow speed and the flow of the insulating oil.
As shown in fig. 3 to 4, the oil inlet is further provided with a liquid level valve 104, the liquid level valve 104 is in signal connection with the control display device 3, the liquid level valve 104 includes a valve, a float switch 1042 and a float 1041, the float 1041 is disposed in the oil-gas separation cavity 105 and floats with the liquid level, the float switch is mounted on the upper portion of the oil-gas separation cavity 105, and the float switch 1042 and the valve are in signal connection with the control display device 3.
Further, the photoacoustic cell 201 is provided with an air inlet end and an air outlet end, the air inlet end of the photoacoustic cell 201 is connected with the air outlet of the oil-gas separation device 1, the air outlet end of the photoacoustic cell 201 is communicated with the oil outlet of the oil-gas separation device 1, the tunable light source 202 is arranged at the air inlet end of the photoacoustic cell 201 and is electrically connected with the power conversion module 4, and the tunable light source 202 emits laser into the photoacoustic cell 201. The separated gas to be detected enters the photoacoustic cell 201 from the gas inlet end, the light source emits laser to irradiate the gas to be detected, the gas absorbs light energy to generate photoacoustic effect, and sound waves with the same period as the modulation frequency are generated for the detection device to detect.
As shown in fig. 3 to 4, at least one flat mirror 2011 is further disposed in the photoacoustic cell 201, the at least one flat mirror 2011 is disposed at an end opposite to the tunable light source 202, and an acute angle is formed between the output light direction of the tunable light source 202 and the reflection surface of the flat mirror 2011. The planar mirror 2011 reflects the laser emitted by the tunable light source 202 out through an obtuse angle, so that the optical path in the photoacoustic cell 201 is increased by more than one time, the photoacoustic effect is enhanced, and the acoustic wave signal is enhanced. In order to further increase the optical path length when the size of the photoacoustic cell allows, as shown in fig. 4, a second planar mirror 2011 facing and parallel to the first planar mirror 2011, a third planar mirror 2011 … … facing and parallel to the second planar mirror 2011, and the like may be further disposed in the photoacoustic cell 201 to meet the required photoacoustic signal intensity requirement.
Further, the tunable light source 202 is a DFB semiconductor laser having a wide band tuning range from near ultraviolet to near infrared. The wave band range comprises wave bands corresponding to gas components dissolved in transformer oil to be detected, and different wave bands of laser are modulated on the controller, so that the test requirements of different gas components are met.
Further, the control display device 3 includes an integrated touch screen and a controller, the touch screen is in signal connection with the controller, and the controller is in signal connection with the tunable light source 202 and the photoacoustic signal conversion module 203 respectively. An opening is further formed in the front panel of the shell 5, and the opening is matched with the touch screen. The touch screen is used for inputting data to the detection device and providing a man-machine interaction page, and the controller is used for controlling the operation of the whole device.
Further, the photoacoustic signal conversion module 203 includes a microphone 2031, an amplifying and filtering circuit 2032, an AD conversion circuit 2033, and a digital phase-locking and filtering module 2034, which are connected in sequence by signals, the microphone 2031 penetrates through the wall of the photoacoustic cell 201, the inductive head thereof is installed in the photoacoustic cell 201, and the output end of the digital phase-locking and filtering module 2034 is connected with the controller by signals. The amplification filtering circuit 2032, the AD converting circuit 2033, and the digital phase locking and filtering module 2034 of the photoacoustic signal converting module 203 are integrated on the control display device 3, and are mounted on the front panel of the housing 5 together with the control display device 3. The microphone 2031 is configured to receive an acoustic signal generated by the gas in the photoacoustic cell 201, transmit the acoustic signal to the amplification and filtering circuit 2032 for signal amplification and noise filtering, perform analog-to-digital conversion by the AD conversion circuit 2033, perform digital signal processing by the digital phase-locked and filtering module 2034, and transmit the signal to the control display device 3 to convert the signal into an image and text for display. By controlling the display device 3, the user can visually observe the current detection data.
As shown in fig. 2, a start button switch 301 and a stop button switch 302 are further mounted on the housing 5, and the start button switch 301 and the stop button switch 302 are respectively connected to the controller by signals. After the monitoring system is powered on, the starting button switch 301 is pressed, and the controller controls the monitoring system to start to extract insulating oil in the transformer oil tank for detection; when the detection is required to be stopped, the stop button switch 302 is pressed, and the controller controls the monitoring system to stop running.
As shown in fig. 2, a power input interface 401 is further disposed on the housing 5, and the power input interface 401 is electrically connected to an input end of the power conversion module 4. The power input interface 401 is connected with an external power supply to provide a power source for the monitoring system. The power input interface 401 is further provided with a power switch with an indicator light for controlling and indicating whether the monitoring system is powered on.
Further, the control display device 3 further includes a network communication module for uploading detection data in real time.
In this embodiment, the oil line pipe is made of teflon pipe, the gas line is made of teflon pipe or stainless steel pipe, and the transformer oil has a dissolving and corrosion effect on the glue, so that the connectors are all made of special high-pressure connectors. The oil feed pump 102 and the oil discharge pump 103 are micropumps. The oil circuit and the gas circuit in the whole monitoring system are hermetically connected, so that oil or gas is prevented from leaking to the outside of the oil circuit and the gas circuit, the components of an oil-gas mixture sent back to the transformer after detection are consistent with the components before detection, and the components of the transformer insulating oil are not interfered by the detection.
The monitoring system of this embodiment adopts oil-gas separation device to carry out gas-liquid separation with transformer insulating oil, and in the oil flow-back transformer, gaseous entering photoacoustic cell 201 is interior to detect, and the gaseous oil of mixing into again after the detection flows back to the transformer. The detection process does not need a gas carrying bottle, so that the occupied space of the device is saved, the gas to be detected is not consumed, and the oil gas component of the transformer is not interfered. The light source adopts a semiconductor laser capable of modulating light source outputs with different wavelengths, the wavelength which can be modulated by the light source corresponds to various gas components dissolved in the transformer oil, and the contents of the gases with different components can be sequentially detected by modulating the light sources with different wavelengths, so that the proportion of various gases can be obtained. Compared with the existing detection device, the detection device has more complete and accurate detection result. By adding the plane mirror 2011 in the photoacoustic cell 201, the optical path is increased, the irradiation frequency of laser to the gas to be detected is increased, the photoacoustic effect is stronger, the generated acoustic wave signal is enhanced, and a stronger detection signal can be obtained in the photoacoustic cell with the same size, so that the device is favorably miniaturized, and the detection result is more accurate. The liquid level valve 104 controls the oil amount in the oil-gas separation device 1, so that the insulating oil is always kept in a stable amount, which is equivalent to quantitative detection of the insulating oil, and calculation and evaluation of detection results are facilitated. The monitoring system of this embodiment has realized using a equipment to detect the multiple composition of transformer oil gas, and detection effect is better, and the check out test set volume is littleer, has saved equipment and space cost, and the suitability is strong.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. The transformer oil-gas monitoring system based on the semiconductor laser is used for detecting insulating oil of an oil-immersed transformer and is characterized by comprising a shell (5), and an oil-gas separation device (1), a photoacoustic spectrum detection device (2), a control display device (3) and a power supply conversion module (4) which are arranged in the shell (5); the oil-gas separation device (1) is arranged at the bottom of the shell; the photoacoustic spectrum detection device (2) is arranged above the oil-gas separation device (1) and is fixedly arranged on the side wall of the shell (5); the shell (5) comprises a front panel, and the control display device (3) is fixedly arranged on the front panel; the power supply conversion module (4) is arranged close to the photoacoustic spectrum detection device (2) and is fixedly arranged on the side wall of the shell (5); wherein the content of the first and second substances,
the oil-gas separation device (1) comprises an oil inlet, an oil outlet and an air outlet, the oil inlet and the oil outlet are respectively communicated with an oil tank of the transformer, and the air outlet is communicated with the photoacoustic spectrum detection device (2);
the photoacoustic spectrum detection device (2) comprises a photoacoustic cell (201) and a photoacoustic signal conversion module (203), the photoacoustic cell is hermetically connected with the oil-gas separation device, a tunable light source (202) is arranged in the photoacoustic cell (201), the tunable light source (202) is in signal connection with the control display device (3), and the tunable light source (202) has a broadband tuning range; the signal acquisition end of the photoacoustic signal conversion module (203) is arranged in the photoacoustic cell (201), and the photoacoustic signal conversion module (203) is in signal connection with the control display device (3);
the input of power conversion module (4) is connected external power source, power conversion module (4) are equipped with multichannel power output, the multichannel power output connects respectively oil-gas separation device (1) optoacoustic spectrum detection device (2) control display device (3) for provide the power for this detection device.
2. The monitoring system according to claim 1, wherein the oil-gas separation device (1) comprises an oil-gas separation cavity (105), an oil inlet, an oil outlet and an air outlet are arranged on the oil-gas separation cavity (105), an oil inlet pump (102) is arranged on the oil inlet, an oil outlet pump (103) is arranged on the oil outlet, a vacuum pump (101) is arranged on the air outlet, and the oil inlet pump (102), the oil outlet pump (103) and the vacuum pump (101) are respectively in signal connection with the control display device (3).
3. The monitoring system according to claim 2, characterized in that a liquid level valve (104) is further arranged at the oil inlet, the liquid level valve (104) is in signal connection with the control display device (3), the liquid level valve (104) comprises a valve, a float switch (1042) and a float ball (1041), the float ball (1041) is arranged in the oil-gas separation cavity (105) and floats along with the liquid level, the float switch is installed at the upper portion of the oil-gas separation cavity (105), and the float switch (1042) and the valve are in signal connection with the control display device (3).
4. The monitoring system according to claim 1, wherein the photoacoustic cell (201) is provided with an air inlet end and an air outlet end, the air inlet end of the photoacoustic cell (201) is connected with the air outlet of the oil-gas separation device (1), the air outlet end of the photoacoustic cell (201) is communicated with the oil outlet of the oil-gas separation device (1), the tunable light source (202) is arranged at the air inlet end of the photoacoustic cell (201) and is electrically connected with the power conversion module (4), and the tunable light source (202) emits laser into the photoacoustic cell (201).
5. The monitoring system according to claim 4, wherein at least one plane mirror (2011) is further disposed in the photoacoustic cell (201), the at least one plane mirror (2011) is disposed at an end opposite to the tunable light source (202), and a direction of an output light of the tunable light source (202) and a reflecting surface of the plane mirror (2011) form an acute angle with each other.
6. The monitoring system according to claim 1, wherein the tunable light source (202) is a semiconductor laser having a broadband tuning range in the near infrared.
7. The monitoring system according to claim 1, wherein the control and display device (3) comprises an integrated touch screen and a controller, the touch screen is in signal connection with the controller, and the controller is in signal connection with the tunable light source (202) and the photoacoustic signal conversion module (203), respectively.
8. The monitoring system according to claim 7, wherein the photoacoustic signal converting module (203) comprises a microphone (2031), an amplifying and filtering circuit (2032), an AD converting circuit (2033), and a digital phase-locking and filtering module (2034) which are sequentially connected by signals, the microphone (2031) is installed in the photoacoustic cell (201), and the output end of the digital phase-locking and filtering module (2034) is connected by signals with the controller.
9. The monitoring system according to claim 7, wherein a start button switch (301) and a stop button switch (302) are further mounted on the housing (5), and the start button switch (301) and the stop button switch (302) are respectively in signal connection with the controller.
10. The monitoring system according to claim 1, wherein a power input interface (501) is further disposed on the housing (5), and the power input interface (501) is electrically connected to an input end of the power conversion module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921680424.1U CN211347908U (en) | 2019-10-09 | 2019-10-09 | Transformer oil gas monitoring system based on semiconductor laser |
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| CN201921680424.1U CN211347908U (en) | 2019-10-09 | 2019-10-09 | Transformer oil gas monitoring system based on semiconductor laser |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112179983A (en) * | 2020-09-29 | 2021-01-05 | 湖北鑫英泰系统技术股份有限公司 | Oil-immersed equipment alarm device |
| CN112415140A (en) * | 2020-11-09 | 2021-02-26 | 内蒙古电力（集团）有限责任公司薛家湾供电局 | Real-time on-line monitoring device for vacuum on-load tap-changer acetylene of transformer |
-
2019
- 2019-10-09 CN CN201921680424.1U patent/CN211347908U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112179983A (en) * | 2020-09-29 | 2021-01-05 | 湖北鑫英泰系统技术股份有限公司 | Oil-immersed equipment alarm device |
| CN112415140A (en) * | 2020-11-09 | 2021-02-26 | 内蒙古电力（集团）有限责任公司薛家湾供电局 | Real-time on-line monitoring device for vacuum on-load tap-changer acetylene of transformer |
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Effective date of registration: 20230116 Address after: No. 27, Beibu Wan East Road, Beihai City, Guangxi Zhuang Autonomous Region (compound of Beihai Power Supply Bureau) Patentee after: BEIHAI POWER SUPPLY BUREAU OF GUANGXI POWER GRID Co.,Ltd. Address before: No. 27, Beibu Wan East Road, Beihai City, Guangxi Zhuang Autonomous Region (compound of Beihai Power Supply Bureau) Patentee before: BEIHAI POWER SUPPLY BUREAU OF GUANGXI POWER GRID Co.,Ltd. Patentee before: WUHAN HAOMAO PHOTOELECTRIC TECHNOLOGY Co.,Ltd. |