CN219695030U - Constant-pressure oil storage device - Google Patents
Constant-pressure oil storage device Download PDFInfo
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- CN219695030U CN219695030U CN202320416752.0U CN202320416752U CN219695030U CN 219695030 U CN219695030 U CN 219695030U CN 202320416752 U CN202320416752 U CN 202320416752U CN 219695030 U CN219695030 U CN 219695030U
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- 238000001514 detection method Methods 0.000 claims abstract description 42
- 230000005540 biological transmission Effects 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 238000000151 deposition Methods 0.000 claims 1
- 238000012795 verification Methods 0.000 abstract description 14
- 238000007789 sealing Methods 0.000 abstract description 9
- 238000012544 monitoring process Methods 0.000 abstract description 6
- 238000012806 monitoring device Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 29
- 238000004587 chromatography analysis Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 239000013589 supplement Substances 0.000 description 4
- 238000004064 recycling Methods 0.000 description 3
- 230000001502 supplementing effect Effects 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Abstract
The utility model relates to laboratory detection and field verification of a transformer on-line monitoring device, in particular to a constant-pressure oil storage device. The existing insulating oil dissolved gas monitoring device lacks reliable sealed storage and constant-pressure output storage equipment for reference oil samples required by verification, and the unstable concentration of characteristic gas contained in the oil samples can influence the verification accuracy. Therefore, the utility model provides a constant-pressure oil storage device which comprises a sealed oil storage cavity with an oil outlet arranged at the lower part, wherein the oil storage cavity can keep the stored reference oil sample matched with the volume of the oil storage cavity by changing the volume of the cavity. According to the utility model, the reference oil sample can be stored in the oil storage cavity in a sealing manner, the volume of the oil storage cavity is changed along with the reduction and adjustment of the oil quantity, and the space for residual gas is not reserved on the oil surface, so that the reference oil sample containing the characteristic gas with stable concentration can be stored in a sealing manner and stably, and meanwhile, the reference oil sample is output in a constant pressure manner, so that the requirements of on-site monitoring, checking and laboratory detection of a transformer are met.
Description
Technical Field
The utility model relates to laboratory detection and field verification of a transformer on-line monitoring device, in particular to a constant-pressure oil storage device.
Background
The components and the content of the dissolved gas in the transformer oil can be qualitatively and quantitatively analyzed by an analysis technology (Dissolved Gas Analysis-DGA) of the dissolved gas in the oil, so that the latent fault existing in the transformer can be timely found. Therefore, the online monitoring device for the content of the dissolved gas in the insulating oil is developed and used for making up the defects of periodic detection in a laboratory, so that the monitoring period is greatly shortened, and the effective real-time detection effect is achieved.
The problems of false alarm, false alarm and false alarm can occur when the existing on-line monitoring device for the content of the dissolved gas in the insulating oil works, so that the correct working condition of an operating transformer cannot be reflected, further risks are brought to a power grid, on-site calibration and calibration are required to be carried out on the device in operation, a reference oil sample is required to be used for the calibration, the concentration of characteristic gas contained in the reference oil sample and the output of the oil sample under the constant pressure condition are very important for on-site calibration and laboratory detection, and the unstable concentration of the characteristic gas can influence the accuracy of the calibration. In order to ensure the accuracy of the verification, the reference oil sample is required to keep stable concentration characteristic gas and can be output at constant pressure, and the on-line monitoring of the content of dissolved gas in the existing insulating oil lacks a matched oil storage device which is sealed and can output at constant pressure.
Disclosure of Invention
The utility model provides a constant-pressure oil storage device, which can be used for storing a reference oil sample of characteristic gas with stable concentration in a sealing manner and outputting the reference oil sample at constant pressure so as to meet the requirements of on-site verification and laboratory detection of a transformer.
The utility model adopts the following technical scheme: the constant-pressure oil storage device is characterized by comprising a sealed oil storage cavity with an oil outlet arranged at the lower part, wherein the oil storage cavity can keep the stored reference oil sample matched with the volume of the oil storage cavity by changing the volume of the cavity. The oil storage cavity can be used for storing the reference oil sample in a sealing manner, the volume of the oil storage cavity can be changed along with the reduction and adjustment of the oil quantity, the space for residual gas is not reserved on the oil surface, the reference oil sample with stable concentration characteristic gas is kept in a sealing and stable storage manner, the oil storage cavity can be pulled to an on-site constant-pressure output stable reference oil sample to an external oil chromatographic detection device during operation, the requirements of on-site monitoring and on-site verification and laboratory detection of transformer insulating oil are met, and the phenomenon that the concentration of the output reference oil sample with the characteristic gas is unstable and influences the verification caused by the fact that the characteristic gas volatilizes and overflows the oil surface to stay in the oil storage cavity is avoided.
As a further improvement and supplement to the technical scheme, the utility model adopts the following technical measures: the oil storage cavity is arranged in an oil cylinder, a piston capable of moving back and forth is arranged in the oil cylinder, the piston divides the inner cavity of the oil cylinder into an adjacent air cavity and the oil storage cavity, the oil outlet is arranged on the side wall of the lower part of the oil cylinder, the air cavity is connected with an air supply source through an air transmission pipeline, the top of the piston is connected with a piston rod, and the piston rod is arranged at one end of the oil cylinder where the air cavity is arranged in a sealing way. When the oil storage device performs verification work on site, the air cavity is used for inputting gas for pressure maintaining through the gas transmission pipeline, along with the output verification of the oil sample, the piston moves to one side of the oil storage cavity along with the reduction of the reference oil sample under the action of the gas for pressure maintaining, the oil quantity is matched with the oil cavity, and the reference oil sample is output at constant pressure. When the oil storage device does not output an oil sample and supplements oil from the lower oil outlet, the piston is pushed to move by the increase of the oil quantity, and the air cavity is not filled with air and is exhausted outwards.
The piston rod and the piston are provided with oil return passages which are communicated, the oil return passages on the piston rod extend to the end part of the piston rod extending out of the oil cylinder to form an oil return port, and the oil return passages on the piston extend to one surface of the piston, which faces the oil storage cavity, to form an oil return outlet communicated with the oil storage cavity. An oil outlet at the lower part of the working platform can be connected with an oil chromatography detection device to convey a reference oil sample for verification, or the oil is manually replenished through the oil outlet, a piston moves during oil replenishment, an air cavity at the other side of the piston is exhausted, and a residual gas space is not reserved above the oil surface after oil replenishment is finished; the oil return port has two effects, and oil chromatography detection device is connected to first effect, and oil-feeding chromatography detection device detects unnecessary reference oil appearance cyclic utilization, and the second effect is as the exhaust hole when oil storage chamber moisturizing, the air in the discharge oil storage chamber. When the oil return port is not connected with the oil chromatography detection device and is not exhausted, the oil return port needs to be sealed. The oil return and the oil outlet of the oil storage cavity are respectively arranged at different heights of the cavity and are not arranged on the same liquid level, and independent work is not affected.
The air supply source is an air pump, the air pump is externally connected with a power supply source and is connected with the air cavity through an air transmission pipeline, the air transmission pipeline is provided with a first valve capable of being opened and closed, and the first valve is a two-position three-way valve. When the air cavity is in operation, the two-position three-way valve enables the air cavity to be switched and selected to input compressed air for pressure maintaining or exhausting outwards, wherein a compressed air supply source is provided by an air pump, and the air pump is externally connected with a power supply source; when the oil storage cavity is used for manually supplementing oil, the air pump does not work, the air cavity is not pressurized, the air cavity is exhausted outwards through the first valve, and the piston moves to one side of the air cavity along with the increase of the oil quantity.
The air pipe between the first valve and the air pump is provided with a one-way valve, and the air pipe between the one-way valve and the air pump is provided with a second valve which can be opened and closed. The check valve can prevent the delivered compressed air from flowing backwards, so that the normal use of the air pump is further protected, and the compressed air can be unidirectionally delivered to one side of the air cavity by the check valve during working; the second valve can directly control the air pump to send the gas to the one side of the check valve, so that the whole gas pipeline can be overhauled and maintained conveniently.
And a water removing device is arranged on the gas transmission pipeline between the one-way valve and the first valve. The relative humidity of the compressed air output by the air pump is high, and the compressed air is sent to the air cavity to work after being dried by the water removing device, so that the influence of the water content of the compressed air on the oil cylinder and the piston where the air cavity is located is avoided. The water removal device is in the prior art.
And a pressure transmitter is arranged on the gas transmission pipeline between the water removing device and the first valve, and is connected with a pressure detection control module which is connected with an air pump and can control the start/stop of the air pump. The automatic regulation of the air pump can be realized by the matching of the pressure transmitter and the pressure detection control module, the pressure transmitter converts the internal air pressure of the air transmission pipeline into an electric signal and sends the electric signal to the pressure detection control module when the pressure reaches a preset high-point value, the air pump stops working, and the air pump restarts to supply pressure when the pressure is lower than the preset high-point value. The pressure transmitter for detecting the air pressure output electric signal and the pressure detection control module for outputting the control command according to the pressure value are both in the prior art.
The pressure detection control module is connected with an alarm. When the pressure detection control module continuously works for more than a set time, the alarm judges that the device has problems such as air leakage or other faults, the alarm gives an alarm, and simultaneously sends a signal to the pressure detection control module to stop the air pump.
The power supply is connected with the air pump through the output of the voltage stabilizing module. The power supply outputs stable voltage through the voltage stabilizing module to drive the air pump to work, and the voltage stabilizing module is in the prior art and can be purchased from the market according to the needs of alternating current or direct current power supply.
The power supply is a mobile power supply. The power supply can adopt a mobile power supply, can be used in a mobile mode according to different working sites, and solves the problem of inconvenient power taking on the working sites.
The constant-pressure oil storage device provided by the utility model can be used for storing the reference oil sample of the characteristic gas with stable concentration in a sealing manner, and realizes the constant-pressure output of the oil storage cavity by inputting compressed air at one side of the piston for maintaining pressure, so that the requirements of on-site monitoring, checking and laboratory detection of a transformer are met, and the influence of the unstable concentration of the characteristic gas on the checking and detection of the reference oil sample is prevented; the oil storage cavity of the oil cylinder is provided with independent oil outlet and oil return ports, so that the oil can be flexibly replenished during working, air can be timely discharged, and an oil sample conveyed to the oil chromatographic detection device can be returned to the oil storage cavity for recycling, so that the oil chromatographic detection device is more environment-friendly; meanwhile, the device uses the mobile power supply to supply power at the working site to solve the problem of inconvenient power taking.
Drawings
Fig. 1: the structure of the utility model is schematically shown.
In the figure: 1. a mobile power supply, 2 an air pump, 3 a second valve, 4 a one-way valve, 5 a water removing device a pressure detection control module, a pressure transmitter, a first valve 9, an oil cylinder, 10, an oil return valve, 11, an oil outlet valve, 12, an alarm, 13, a pressure stabilizing module, 141, a piston, 142, a piston rod, 151, an oil storage cavity and 152, and an air cavity.
Detailed Description
The utility model is further described with reference to the accompanying drawings and detailed description.
As shown in fig. 1, a constant-pressure oil storage device comprises a sealed oil storage cavity 151 with an oil outlet at the lower part, wherein the oil storage cavity 151 can be matched with the volume of the oil storage cavity 151 by changing the volume of a cavity body to keep stored reference oil sample, the oil storage cavity 151 in the embodiment is arranged in an oil cylinder 9, a piston 141 capable of moving back and forth is arranged in the oil cylinder 9 and divides the oil cylinder cavity into adjacent oil storage cavities 151 and air cavities 152, the embodiment prefers the piston 141 to move up and down, the corresponding piston 141 also separates the inner cavity of the oil cylinder 9 into an air cavity 152 and an oil storage cavity 151 which are distributed up and down, the oil outlet is arranged on the side wall of the lower part of the oil cylinder 9, the oil outlet is connected with an oil inlet of an on-site external oil chromatography detection device (not shown in the figure) through a pipeline with an oil outlet valve 11, so as to convey the reference oil sample to the detection device, the air cavity 152 is connected with an air supply source through a gas pipeline or is exhausted outwards, the top of the piston 141 is connected with a piston rod 142, the piston rod 142 is vertically and hermetically arranged at the upper end of the oil cylinder 9 corresponding to the oil cavity 152, meanwhile, the piston rod 142 and the piston rod 141 is provided with an oil return passage which is communicated with the piston rod 142 on one side of the oil cavity 9, the piston rod 142 extends to the oil storage cavity 9, and extends to the oil storage cavity 151 to the oil outlet 10, and forms an oil return passage which extends to the oil inlet channel 10. The oil outlet valve 11 adopts a three-way switching valve to realize the output of an oil sample to an oil chromatograph detection device or the supplement of a reference oil sample by the oil storage cavity; the oil return valve 10 also adopts a three-way switching valve so as to be connected with an oil chromatography detection device for recycling the oil sample to be returned or exhausting the oil outwards according to the requirement.
When the oil storage device outputs a reference oil sample on site for verification, the reference oil sample is stored in the oil storage cavity in a sealing way, one side of the air cavity is pressurized by inputting compressed air, the piston can move downwards along with the reduction of the reference oil sample in the oil storage cavity, the volume of the oil storage cavity is adjusted, a space for residual gas is not reserved on the oil surface, the reference oil sample containing stable concentration characteristic gas is stored in a sealing way, the reference oil sample is output to an external oil chromatographic detection device in a constant pressure way by the oil storage cavity, and the requirements of on-site monitoring, verification and laboratory detection on transformer insulating oil are met. The oil storage cavity stores a reference oil sample for a long time, the air tightness is good, the concentration of characteristic gas is stable, and the hydrogen loss per week of the oil sample is less than 2.5%. The reference oil sample detected by the oil chromatography detection device can also flow back into the oil storage cavity for recycling. When the reference oil sample is reduced, the oil level can be increased by manually supplementing oil through the oil outlet, air in the oil storage cavity can be discharged through the oil return passage and the oil return port during oil supplementing, and meanwhile, the air cavity is disconnected and connected with the air supply source, so that the piston can be supplemented and moved upwards along with the reference oil sample, and no residual gas space exists on the oil level. When the oil return port is not exhausted and is not connected with the oil chromatography detection device to detect oil return, the oil return port needs to be closed.
Further, in this embodiment, the air supply source for supplying air to the air cavity 152 is an air pump 2, the air pump 2 is connected with the mobile power supply 1, the air transmission pipeline is provided with a first valve 8 capable of being opened and closed, the first valve 8 is a two-position three-way switching valve, and the two-position three-way valve can enable the air cavity to switch between pressure maintaining of input compressed air and outward exhausting, so as to respectively meet the requirements of constant-pressure output of oil samples and oil supplement; be equipped with check valve 4 on the gas-supply pipeline between first valve 8 and air pump 2 and prevent compressed air backward flow, be equipped with the second valve 3 of switching on and off on the gas-supply pipeline between check valve 4 and air pump 2, second valve 3 is the solenoid valve, be equipped with water trap 5 on the gas-supply pipeline between check valve 4 and first valve 8 and carry out drying treatment to the compressed air that passes through, still be equipped with pressure transmitter 7 on the gas-supply pipeline between water trap 5 and first valve 8, pressure transmitter 7 connects pressure detection control module 6, pressure detection control module 6 links to each other and can control the air pump and start or shut down work with air pump 2, pressure detection control module 6 connects alarm 12. The pressure transmitter 7 converts the internal air pressure of the air transmission pipeline into an electric signal and sends the electric signal to the pressure detection control module 6, when the air pressure reaches a preset high-point value, the air pump 2 stops working, when the air pressure is lower than the preset high-point value, the air pump 2 restarts to supply pressure, and the output pressure range can be regulated to be 0-0.4 Mpa through the pressure detection control module according to the verification requirement of the site; when the pressure detection control module 6 continuously works for more than a set time and the air pump 2 is not shut down, the alarm 12 judges that the device has a problem such as air leakage or other faults, and the alarm 12 gives an alarm and sends a signal to the pressure detection control module 6 to shut down the air pump 2. When the oil storage cavity is filled with oil manually, the air pump is closed, and the air cavity is exhausted. The utility model supplies power by using the mobile power supply 1 in the field work, the mobile power supply 1 is connected with the air pump 2 after being connected with the voltage stabilizing module 13, and other electric loads of the device such as a module, an electromagnetic valve and the like are supplied with power.
Claims (9)
1. The utility model provides a constant pressure oil storage device, characterized by includes that a sealed oil storage chamber (151) of oil-out is established to lower part, oil storage chamber (151) accessible change cavity volume keeps the reference oil appearance of depositing and oil storage chamber (151) volume matching, oil storage chamber (151) are established in a hydro-cylinder (9), are equipped with piston (141) that can reciprocate in hydro-cylinder (9), and piston (141) separate the inner chamber of hydro-cylinder (9) into adjacent air cavity (152) with oil storage chamber (151), the oil-out is established on the lateral wall of hydro-cylinder (9) lower part, air cavity (152) connect the air feed source through the gas transmission pipeline, piston rod (142) are connected at piston (141) top, and piston rod (142) seal wears to put in hydro-cylinder (9) one end that air cavity (152) are located.
2. The constant pressure oil storage device according to claim 1, wherein the piston rod (142) and the piston (141) are provided with oil return passages which are communicated, the oil return passages on the piston rod (142) extend to the end of the piston rod (142) extending out of the oil cylinder (9) to form an oil return port, and the oil return passages on the piston (141) extend to one surface of the piston (141) facing the oil storage cavity (151) to form an oil return outlet which is communicated with the oil storage cavity (151).
3. The constant pressure oil storage device according to claim 2, wherein the air supply source is an air pump (2), the air pump (2) is externally connected with a power supply source and is connected with the air cavity (152) through an air transmission pipeline, the air transmission pipeline is provided with a first valve (8) which can be opened and closed, and the first valve (8) is a two-position three-way valve.
4. A constant pressure oil storage device according to claim 3, characterized in that a one-way valve (4) is arranged on the gas transmission pipeline between the first valve (8) and the air pump (2), and a second valve (3) which can be opened and closed is arranged on the gas transmission pipeline between the one-way valve (4) and the air pump (2).
5. The constant pressure oil storage device according to claim 4, wherein a water removal device (5) is arranged on the gas transmission pipeline between the one-way valve (4) and the first valve (8).
6. The constant pressure oil storage device according to claim 5, wherein a pressure transmitter (7) is arranged on the gas transmission pipeline between the water removal device (5) and the first valve (8), the pressure transmitter (7) is connected with a pressure detection control module (6), and the pressure detection control module (6) is connected with the air pump (2) and can operate the start/stop operation of the air pump.
7. Constant pressure oil storage device according to claim 6, characterized in that the pressure detection control module (6) is connected to an alarm (12).
8. A constant pressure oil storage device according to claim 3, characterized in that the power supply is connected with the air pump (2) through the output of the voltage stabilizing module (13).
9. The constant pressure oil storage device according to claim 8, characterized in that the power supply is a movable power supply (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320416752.0U CN219695030U (en) | 2023-02-28 | 2023-02-28 | Constant-pressure oil storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320416752.0U CN219695030U (en) | 2023-02-28 | 2023-02-28 | Constant-pressure oil storage device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219695030U true CN219695030U (en) | 2023-09-15 |
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ID=87965433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320416752.0U Active CN219695030U (en) | 2023-02-28 | 2023-02-28 | Constant-pressure oil storage device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219695030U (en) |
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2023
- 2023-02-28 CN CN202320416752.0U patent/CN219695030U/en active Active
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Address after: 311251, Room 507, Building D, Chenjiaqiang Gate Group Entrepreneurship Community, Baishan Chen Community, Linpu Town, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou Chenxing Technology Co.,Ltd. Country or region after: China Address before: 5th Floor, Delong Science and Technology Park, No. 9, Xianxing Road, Xianlin Street, Yuhang District, Hangzhou City, Zhejiang Province, 311122 Patentee before: Hangzhou Chenxing Technology Co.,Ltd. Country or region before: China |