CN111068471A - Device for preparing dry air on site - Google Patents
Device for preparing dry air on site Download PDFInfo
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- CN111068471A CN111068471A CN201911185015.9A CN201911185015A CN111068471A CN 111068471 A CN111068471 A CN 111068471A CN 201911185015 A CN201911185015 A CN 201911185015A CN 111068471 A CN111068471 A CN 111068471A
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- air
- humidity sensor
- electromagnetic valve
- dry air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
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Abstract
The application discloses a device for preparing dry air on site, which is used for an online monitoring system of dissolved gas in transformer oil and comprises an air inlet, a gas filtering mechanism, an air compressor, a dry air circulating mechanism, a humidity sensor assembly, an electromagnetic valve assembly, an air storage tank and an air delivery pipe; the air inlet, the gas filtering mechanism, the air compressor and the dry air circulating mechanism are communicated through an air pipe, and the dry air circulating mechanism and the air storage tank are communicated through the air pipe. The device is simple in structure, and the air with certain dryness is prepared by utilizing the on-site air through the structures such as the gas filtering mechanism, the air compressor, the dry air circulating mechanism and the air storage tank. The humidity sensor assembly can monitor the concentration of the dry air in real time, the dry air with the concentration can be automatically set to carry out carrier gas supply, the defect that an operator frequently changes a carrier gas tank is reduced to a certain extent, the dry air can be prepared through wireless circulation of the air in the field, and the continuous detection of a monitoring system is guaranteed.
Description
Technical Field
The application relates to the technical field of monitoring of dissolved gas of transformers, in particular to a device for preparing dry air on site.
Background
The transformer is one of the most critical devices in the power system, and it is related to voltage conversion and power distribution and transmission, so whether the transformer works well plays a crucial role.
Oil-immersed transformers, as a common electrical device, perform insulation and heat dissipation functions through oil, but the insulating oil generates characteristic gas which can be dissolved in the transformer under the conditions of heat release and discharge, so that machine failure and damage are caused. Therefore, the dissolved gas in the transformer oil needs to be detected in time, and the fault of the transformer is determined by analyzing the content, component concentration and gas change of the dissolved gas in the oil.
In the detection process of the online monitoring system for dissolved gas in the transformer in the market at present, carrier gas is required to be used for carrying sample gas to enter the detection system, but in the use process of the carrier gas, the loss speed is extremely high, and the online monitoring system needs to be frequently replaced.
Disclosure of Invention
The application aims to provide a device for preparing dry air on site to solve the problem that carrier gas needs to be frequently replaced and cannot be continuously monitored in the detection process of a dissolved gas online monitoring system in a transformer.
According to the embodiment of the application, the device for preparing the dry air on site is provided, and is used for an online monitoring system for the dissolved gas in the transformer oil, and the device comprises an air inlet, a gas filtering mechanism, an air compressor, a dry air circulating mechanism, a humidity sensor assembly, an electromagnetic valve assembly, an air storage tank and an air conveying pipe;
the air inlet, the air filtering mechanism, the air compressor and the dry air circulating mechanism are communicated through the air conveying pipe, and the dry air circulating mechanism and the air storage tank are communicated through the air conveying pipe;
the electromagnetic valve assembly comprises a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a fourth electromagnetic valve, the first electromagnetic valve is arranged between the air compressor and the dry air circulation mechanism, the second electromagnetic valve and the third electromagnetic valve are arranged on the side wall of the dry air circulation mechanism, and the fourth electromagnetic valve is arranged between the dry air circulation mechanism and the air storage tank;
the humidity sensor assembly comprises a first humidity sensor, a second humidity sensor, a third humidity sensor and a fourth humidity sensor, the first humidity sensor, the second humidity sensor and the third humidity sensor are arranged in the dry air circulating mechanism, and the fourth humidity sensor is arranged on the fourth electromagnetic valve;
the top of the gas storage tank is provided with a pressure reducing valve, and the top of the gas storage tank is provided with a pressure sensor.
Further, the device also comprises an air generator switch, wherein the air generator switch is arranged on the air storage tank and is electrically connected with the air compressor.
Further, the gas filtering mechanism comprises a multi-stage gas filtering device.
Further, the air compressor comprises an oil-free air compressor.
Further, the drying air circulation device comprises a gas polymer film drying mechanism.
Furthermore, the first humidity sensor is arranged at the bottom of the dry air circulation mechanism, the second humidity sensor is arranged on the gas transmission pipeline controlled by the second electromagnetic valve, and the third humidity sensor is arranged on the gas transmission pipeline controlled by the third electromagnetic valve.
According to the technical scheme, the device for preparing the dry air on site is used for the online monitoring system of the dissolved gas in the transformer oil, and comprises a gas inlet, a gas filtering mechanism, an air compressor, a dry air circulating mechanism, a humidity sensor assembly, an electromagnetic valve assembly, a gas storage tank and a gas conveying pipe; the air inlet, the air filtering mechanism, the air compressor and the dry air circulating mechanism are communicated through the air conveying pipe, and the dry air circulating mechanism and the air storage tank are communicated through the air conveying pipe; the electromagnetic valve assembly comprises a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a fourth electromagnetic valve, the first electromagnetic valve is arranged between the air compressor and the dry air circulation mechanism, the second electromagnetic valve and the third electromagnetic valve are arranged on the side wall of the dry air circulation mechanism, and the fourth electromagnetic valve is arranged between the dry air circulation mechanism and the air storage tank; the humidity sensor assembly comprises a first humidity sensor, a second humidity sensor, a third humidity sensor and a fourth humidity sensor, the first humidity sensor, the second humidity sensor and the third humidity sensor are arranged in the dry air circulating mechanism, and the fourth humidity sensor is arranged on the fourth electromagnetic valve; the top of the gas storage tank is provided with a pressure reducing valve, and the top of the gas storage tank is provided with a pressure sensor. The device is simple in structure, and the air with certain dryness is prepared by utilizing the field air through the structures such as the gas filtering mechanism, the air compressor, the dry air circulating mechanism and the air storage tank, so that the dissolved gas in the transformer oil can be used by the online monitoring system. Moreover, the humidity sensor assembly can monitor the concentration of the dry air in real time, the dry air with the concentration can be automatically set to carry out carrier gas supply, and the defect that an operator frequently changes a carrier gas tank is overcome to a certain extent. Compared with similar products, the dry air can be prepared by utilizing the wireless circulation of the air on site, and the continuous detection of a monitoring system is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural view illustrating an apparatus for preparing dry air on site according to an embodiment of the present application.
Illustration of the drawings:
the air conditioner comprises an air inlet 1, an air filtering mechanism 2, an air compressor 3, a dry air circulating mechanism 4, a first humidity sensor 51, a second humidity sensor 52, a third humidity sensor 53, a fourth humidity sensor 54, a first electromagnetic valve 61, a second electromagnetic valve 62, a third electromagnetic valve 63, a fourth electromagnetic valve 64, an air storage tank 7, a pressure sensor 8, an air conveying pipe 9, a pressure reducing valve 10 and an air generator switch 11.
Detailed Description
Referring to fig. 1, the embodiment of the present application provides a device for preparing dry air on site, which is used for an online monitoring system for dissolved gas in transformer oil, and includes an air inlet 1, a gas filtering mechanism 2, an air compressor 3, a dry air circulating mechanism 4, a humidity sensor assembly, an electromagnetic valve assembly, an air storage tank 7 and an air delivery pipe 9;
the air inlet 1, the air filtering mechanism 2, the air compressor 3 and the dry air circulating mechanism 4 are communicated through the air conveying pipe 9, and the dry air circulating mechanism 4 and the air storage tank 7 are communicated through the air conveying pipe 9;
the electromagnetic valve assembly comprises a first electromagnetic valve 61, a second electromagnetic valve 62, a third electromagnetic valve 63 and a fourth electromagnetic valve 64, the first electromagnetic valve 61 is arranged on the air pipe 9 between the air compressor 3 and the dry air circulation mechanism 4, the second electromagnetic valve 62 and the third electromagnetic valve 63 are arranged on the side wall of the dry air circulation mechanism 4, and the fourth electromagnetic valve 64 is arranged on the air pipe 9 between the dry air circulation mechanism 4 and the air storage tank 7;
wherein, the second electromagnetic valve 62 controls the switch of the gas transmission channel connected with the upper layer and the lower layer of the dry air circulation mechanism 4, and the third electromagnetic valve 63 controls the switch of the gas transmission channel connected with the lower layer and the upper layer of the dry air circulation mechanism 4.
The humidity sensor assembly comprises a first humidity sensor 51, a second humidity sensor 52, a third humidity sensor 53 and a fourth humidity sensor 54, the first humidity sensor 51, the second humidity sensor 52 and the third humidity sensor 53 are arranged in the dry air circulation mechanism 4, and the fourth humidity sensor 54 is arranged on the fourth electromagnetic valve 64; the fourth humidity sensor 54 is used for measuring the humidity in the air pipe 9 between the dry air circulation mechanism 4 and the air storage tank 7.
Further, the first humidity sensor 51 is disposed at the bottom of the dry air circulation mechanism 4, the second humidity sensor 52 is disposed on the air transmission pipeline controlled by the second electromagnetic valve 62, and the third humidity sensor 53 is disposed on the air transmission pipeline controlled by the third electromagnetic valve 63.
The top of the air storage tank 7 is provided with a pressure reducing valve 10, and the top of the air storage tank 7 is provided with a pressure sensor 8.
It should be noted that the solenoid valve assembly, the pressure reducing valve 10, the humidity sensor assembly and the pressure sensor 8 installed in the device of the present application are all controlled in a unified manner by a control system, and a required program or software can be implemented by a common software developer.
When the air-conditioning system is used, firstly, the switch 11 of the air generator is turned on, the air compressor 3 starts to operate, the field air enters from the air inlet 1, is filtered by the air filtering mechanism 2 and then enters the air compressor 3 through the air conveying pipe 9, and enters the dry air circulating mechanism 4 after passing through the air compressor 3. The circulation process of the drying air is performed in the drying air circulation mechanism 4 by the cooperation of the humidity sensor assembly and the solenoid valve assembly. The circulation process comprises the following steps: when the field air enters the air conveying pipe 9 after passing through the air compressor 3, the first electromagnetic valve 61 is opened at the moment, the air enters the dry air circulation mechanism 4, the air is circularly dried at the bottom at the moment, the humidity of the air is monitored by the first humidity sensor 51, when the humidity of the air reaches the preset range of the first humidity sensor 51, the first electromagnetic valve 61 is closed, the second electromagnetic valve 62 is opened, the air is released to the upper layer of the dry air circulation mechanism 4, the concentration of the dry air in the dry air circulation mechanism 4 is lower than the set range of the second humidity sensor 52, and the air conveying channel is closed by the second electromagnetic valve 62. If the concentration of the upper layer dry air in the dry air circulation mechanism 4 reaches the preset range of the fourth humidity sensor 54, the second solenoid valve 62 is closed, and the fourth solenoid valve 64 is opened, so that the dried air enters the air storage tank 7. Meanwhile, if the drying concentration of the upper layer is lower than the preset range of the third humidity sensor 53, the first solenoid valve 61, the second solenoid valve 62 and the fourth solenoid valve 64 are closed, the third solenoid valve 63 is opened, and the air with insufficient concentration returns to the lower layer of the drying air circulation mechanism 4 to be dried continuously. When the pressure sensor 8 detects that the pressure in the air storage tank 7 reaches a set value, the pressure reducing valve 10 releases the air, and pressure balance is ensured.
The device of the application has a simple structure, and effectively realizes the preparation of air with certain dryness by utilizing field air through structures such as the gas filtering mechanism 2, the air compressor 3, the dry air circulating mechanism 4, the gas storage tank 7 and the like, and is used by a dissolved gas online monitoring system in transformer oil. Moreover, the humidity sensor assembly can monitor the concentration of the dry air in real time, the dry air with the concentration can be automatically set to carry out carrier gas supply, and the defect that an operator frequently changes a carrier gas tank is overcome to a certain extent. Compared with similar products, the dry air can be prepared by utilizing the wireless circulation of the air on site, and the continuous detection of a monitoring system is ensured.
Further, the device also comprises an air generator switch 11, wherein the air generator switch 11 is arranged on the air storage tank 7, and the air generator switch 11 is electrically connected with the air compressor 3.
An air generator switch 11 is placed near the air compressor 3 for controlling the switching of the air compressor 3.
Further, the gas filtering mechanism 2 includes a multistage gas filtering device. The multistage gas filtering device can filter and remove particle impurities.
Further, the air compressor 3 includes an oil-free air compressor. The core of the oil-free air compressor is a superior two-stage compression main machine. The rotor is finely processed by twenty working procedures, so that the linear form of the rotor reaches the accuracy and the durability which are incomparable. The high-quality bearing and the precision gear are arranged in the rotor, so that the coaxiality of the rotor is guaranteed, the rotor is accurately matched, and long-term, efficient and reliable operation is kept.
Further, the drying air circulation mechanism 4 includes a gas polymer film drying mechanism. The working principle of the gas polymer film drying mechanism 4 is as follows: the high molecular hollow membrane air dehumidifier is a bundle formed by gathering tens of thousands of high molecular material hollow fiber yarns, and two ends of each bundle of yarns are bonded and fixed in a compact pressure-resistant cylinder by epoxy polymers. When compressed air without liquid water or oil flows along the inner cavity of the hollow fiber tube, the partial pressure of various gases is under the action of the driving force-partial pressure difference formed by the inner cavity (raw material side) and the outer cavity (permeation side) of the hollow fiber tube, the gas (such as water vapor) with large dissolution coefficient and diffusion coefficient preferentially permeates through the tube wall, and other gases (such as nitrogen, oxygen and the like) are relatively blocked, so that the separation purpose is achieved. The service life of the dry air circulating mechanism 4 is as long as 10 years, the dry air circulating mechanism does not need a power supply, is safe to use, has a compact structure, saves space, and directly utilizes the pressure of compressed air as a driving force for separating water vapor. The absolute dehydration rate is up to more than 99 percent, and the dew point of the dry air can reach minus 30 ℃ to minus 50 ℃. The application selects the combination of gas polymer film drying and deep drying purification, and the gas deep purification is configured for on-line circulation drying.
According to the technical scheme, the device for preparing the dry air on site is used for an online monitoring system for the dissolved gas in the transformer oil, and comprises an air inlet 1, a gas filtering mechanism 2, an air compressor 3, a dry air circulating mechanism 4, a humidity sensor assembly, an electromagnetic valve assembly, an air storage tank 7 and an air conveying pipe 9; the air inlet 1, the air filtering mechanism 2, the air compressor 3 and the dry air circulating mechanism 4 are communicated through the air conveying pipe 9, and the dry air circulating mechanism 4 and the air storage tank 7 are communicated through the air conveying pipe 9; the solenoid valve assembly includes a first solenoid valve 61, a second solenoid valve 62, a third solenoid valve 63 and a fourth solenoid valve 64, the first solenoid valve 61 is disposed between the air compressor 3 and the dry air circulation mechanism 4, the second solenoid valve 62 and the third solenoid valve 63 are disposed on a side wall of the dry air circulation mechanism 4, and the fourth solenoid valve 64 is disposed between the dry air circulation mechanism 4 and the air tank 7; the humidity sensor assembly comprises a first humidity sensor 51, a second humidity sensor 52, a third humidity sensor 53 and a fourth humidity sensor 54, the first humidity sensor 51, the second humidity sensor 52 and the third humidity sensor 53 are arranged in the dry air circulation mechanism 4, and the fourth humidity sensor 54 is arranged on the fourth electromagnetic valve 64; the top of the air storage tank 7 is provided with a pressure reducing valve 10, and the top of the air storage tank 7 is provided with a pressure sensor 8. The device of the application has a simple structure, and effectively realizes the preparation of air with certain dryness by utilizing field air through structures such as the gas filtering mechanism 2, the air compressor 3, the dry air circulating mechanism 4, the gas storage tank 7 and the like, and is used by a dissolved gas online monitoring system in transformer oil. Moreover, the humidity sensor assembly can monitor the concentration of the dry air in real time, the dry air with the concentration can be automatically set to carry out carrier gas supply, and the defect that an operator frequently changes a carrier gas tank is overcome to a certain extent. Compared with similar products, the dry air can be prepared by utilizing the wireless circulation of the air on site, and the continuous detection of a monitoring system is ensured.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (6)
1. A device for preparing dry air on site is used for an online monitoring system of dissolved gas in transformer oil, and is characterized by comprising an air inlet (1), a gas filtering mechanism (2), an air compressor (3), a dry air circulating mechanism (4), a humidity sensor assembly, a solenoid valve assembly, an air storage tank (7) and an air conveying pipe (9);
the air inlet (1), the air filtering mechanism (2), the air compressor (3) and the dry air circulating mechanism (4) are communicated through the air pipe (9), and the dry air circulating mechanism (4) and the air storage tank (7) are communicated through the air pipe (9);
the electromagnetic valve assembly comprises a first electromagnetic valve (61), a second electromagnetic valve (62), a third electromagnetic valve (63) and a fourth electromagnetic valve (64), the first electromagnetic valve (61) is arranged between the air compressor (3) and the drying air circulation mechanism (4), the second electromagnetic valve (62) and the third electromagnetic valve (63) are arranged on the side wall of the drying air circulation mechanism (4), and the fourth electromagnetic valve (64) is arranged between the drying air circulation mechanism (4) and the air storage tank (7);
the humidity sensor assembly comprises a first humidity sensor (51), a second humidity sensor (52), a third humidity sensor (53) and a fourth humidity sensor (54), the first humidity sensor (51), the second humidity sensor (52) and the third humidity sensor (53) are arranged in the dry air circulating mechanism (4), and the fourth humidity sensor (54) is arranged on a fourth electromagnetic valve (64);
the top of the air storage tank (7) is provided with a pressure reducing valve (10), and the top of the air storage tank (7) is provided with a pressure sensor (8).
2. The device according to claim 1, further comprising an air generator switch (11), said air generator switch (11) being provided on said air storage tank (7), said air generator switch (11) being electrically connected to said air compressor (3).
3. The device according to claim 1, wherein the gas filtering means (2) comprises a multi-stage gas filtering device.
4. The arrangement according to claim 1, characterized in that the air compressor (3) comprises an oil-free air compressor.
5. The device according to claim 1, characterized in that the drying air circulation means (4) comprise a gaseous polymeric membrane drying mechanism.
6. The device according to claim 1, characterized in that said first humidity sensor (51) is arranged at the bottom of said drying air circulation means (4), said second humidity sensor (52) is arranged on a gas duct controlled by said second solenoid valve (62), and said third humidity sensor (53) is arranged on a gas duct controlled by said third solenoid valve (63).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911185015.9A CN111068471A (en) | 2019-11-27 | 2019-11-27 | Device for preparing dry air on site |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911185015.9A CN111068471A (en) | 2019-11-27 | 2019-11-27 | Device for preparing dry air on site |
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| CN111068471A true CN111068471A (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911185015.9A Pending CN111068471A (en) | 2019-11-27 | 2019-11-27 | Device for preparing dry air on site |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115200219A (en) * | 2022-08-12 | 2022-10-18 | 保定天威顺达变压器有限公司 | Dry-type transformer insulation resistance improving device and manufacturing method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008125283A1 (en) * | 2007-04-12 | 2008-10-23 | Neubert, Susanne | Method and device for treating liquids, using an electrolytic drying stage |
| CN204073801U (en) * | 2014-09-18 | 2015-01-07 | 中国船舶重工集团公司第七一七研究所 | A kind of automatic inflating drying device |
| CN104330532A (en) * | 2014-10-31 | 2015-02-04 | 广西电网公司电力科学研究院 | Device for obtaining carrier gas for monitoring oil gases from transformer on site |
| CN107899381A (en) * | 2017-12-18 | 2018-04-13 | 常州大学 | A kind of oil gas adsorption condensing processing unit for not shutting down defrosting and oil-gas recovery method |
| CN108955224A (en) * | 2018-08-20 | 2018-12-07 | 天津商业大学 | A kind of enclosed earth source heat pump drying system |
-
2019
- 2019-11-27 CN CN201911185015.9A patent/CN111068471A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008125283A1 (en) * | 2007-04-12 | 2008-10-23 | Neubert, Susanne | Method and device for treating liquids, using an electrolytic drying stage |
| CN204073801U (en) * | 2014-09-18 | 2015-01-07 | 中国船舶重工集团公司第七一七研究所 | A kind of automatic inflating drying device |
| CN104330532A (en) * | 2014-10-31 | 2015-02-04 | 广西电网公司电力科学研究院 | Device for obtaining carrier gas for monitoring oil gases from transformer on site |
| CN107899381A (en) * | 2017-12-18 | 2018-04-13 | 常州大学 | A kind of oil gas adsorption condensing processing unit for not shutting down defrosting and oil-gas recovery method |
| CN108955224A (en) * | 2018-08-20 | 2018-12-07 | 天津商业大学 | A kind of enclosed earth source heat pump drying system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115200219A (en) * | 2022-08-12 | 2022-10-18 | 保定天威顺达变压器有限公司 | Dry-type transformer insulation resistance improving device and manufacturing method thereof |
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Application publication date: 20200428 |