CN110736646A - Oil taking auxiliary device of main transformer tap switch - Google Patents
Oil taking auxiliary device of main transformer tap switch Download PDFInfo
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- CN110736646A CN110736646A CN201910980940.4A CN201910980940A CN110736646A CN 110736646 A CN110736646 A CN 110736646A CN 201910980940 A CN201910980940 A CN 201910980940A CN 110736646 A CN110736646 A CN 110736646A
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- oil
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- oil pumping
- oil extraction
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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Abstract
The invention relates to an main transformer tap changer oil taking auxiliary device which comprises an oil pumping box, a manual decompression bag arranged at the top of the oil pumping box, an oil pumping pipe arranged at the bottom of the oil pumping box and a sampling device, wherein the sampling device comprises a sampling barrel, the sampling barrel is communicated with the bottom of the oil pumping box through a sampling pipe, and a one-way valve is arranged on the sampling pipe.
Description
Technical Field
The invention relates to the technical field of power transmission and transformation, in particular to an oil taking auxiliary device of main transformer tap changers.
Background
The power transformer is which is the main equipment of power plant and substation, the transformer is used for raising voltage to send electric energy to the power utilization area and lowering the voltage to the use voltage of each stage to meet the requirement of power utilization, in short, the raising and lowering voltage must be completed by the transformer, two losses of voltage and power are generated inevitably in the process of transmitting electric energy by the power system, the voltage loss is in inverse proportion to the voltage when the power is transmitted, the power loss is in inverse proportion to the square of the voltage, and the voltage is raised by the transformer, thus reducing the power transmission loss.
The transformer is composed of two or more coil windings wound on the same iron core, the windings are connected by alternating magnetic field and work according to electromagnetic induction principle, the installation position of the transformer should be considered to be convenient for operation, maintenance and transportation, and should select safe and reliable places.
The main components of the power transformer include:
A. moisture absorber (silica gel cartridge): silica gel is filled in the transformer, insulating oil in an oil conservator (conservator) is communicated with the atmosphere through a moisture absorber, and a drying agent absorbs moisture and impurities in the air so as to keep good insulating property of an internal winding of the transformer; silica gel is easy to block due to discoloration and deterioration.
B. The oil level indicator reflects the oil level state of the transformer, is about +20O as , needs to discharge oil when the oil level is too high, and needs to be added when the oil level is too low, has small oil level change or slightly drops when the temperature is low and the load is light in winter, and slightly rises when the temperature is high and the oil level is also slightly rises when the load is heavy in summer, and both are normal.
C. An oil conservator: the oil quantity of the oil tank is adjusted to prevent the over-speed oxidation of the transformer oil, and the upper part of the oil tank is provided with an oil filling hole.
D. Explosion-proof pipe: the explosion danger caused by the pressure increase in the oil tank due to sudden accidents is prevented.
E. Signal thermometer: the transformer operating temperature is monitored and a signal is sent. The temperature of the upper oil layer of the transformer is indicated, and the temperature of the coil of the transformer is 10 ℃ higher than that of the upper oil layer. The national standard stipulations are as follows: the ultimate working temperature of the transformer winding is 105 ℃; (i.e., when the ambient temperature is 40 ℃), the upper layer temperature should not exceed 95 ℃, and the monitoring temperature (upper layer oil temperature) is preferably set to 85 ℃ or lower.
F. A tap switch: the voltage ratio is changed by changing the high voltage winding taps, increasing or decreasing the number of winding turns.
In the prior art, oil taking ports of most main transformer tap changers are round pipe outlets, oil outlets are large, flow is not well controlled, oil of the tap changers is easy to leak to the ground or the body of a tester on site, and the ground is polluted and the tester is injured.
The oil outlet of the tap changer is too large, so that the oil of the tap changer is easily contacted with air, and the insulativity of the tap changer can be influenced.
When the oil bottle is used for taking the oil sample of the tap switch, the oil sample of the oil bottle can be contacted with air, and the electrical performance of the oil sample of the tap switch can not be accurately reflected.
Disclosure of Invention
The invention aims to provide main transformer tap changer oil taking auxiliary devices which are easy to control oil absorption, avoid contact between oil samples and air and have good sampling effect.
The invention adopts the following technical scheme:
main transformer tap switch oil taking auxiliary device comprises an oil pumping box, a manual decompression bag arranged at the top of the oil pumping box, an oil pumping pipe arranged at the bottom of the oil pumping box and a sampling device, wherein the sampling device comprises a sampling barrel, the sampling barrel is communicated with the bottom of the oil pumping box through a sampling pipe, and the sampling pipe is provided with a one-way valve.
And , the oil pumping pipe penetrates through the bottom of the oil pumping box and extends into the oil pumping box, and the vertical height of the opening of the oil pumping pipe in the oil pumping box and the bottom surface of the oil pumping box is 5-10 cm.
, a flow guide inclined plane is arranged at the bottom of the oil pumping box, the opening of the oil pumping pipe in the oil pumping box is positioned on the flow guide inclined plane, and the flow guide inclined plane inclines from high to low from the oil pumping pipe side to the sampling pipe side.
, arranging an observation window on the side wall of the sampling barrel, and arranging a volume indication scale mark on the observation window.
, sleeving a connecting rubber plug at the free end of the oil pumping pipe at the bottom of the oil pumping tank, wherein the section of the connecting rubber plug is in an inverted trapezoid shape.
, concentric annular sealing bosses are uniformly arranged on the side wall of the connecting rubber plug.
, the manual pressure reducing bag comprises a bag body, an exhaust pipe arranged at the top end of the bag body and an exhaust pipe arranged at the bottom end of the bag body, the exhaust pipe is communicated with a top plate of the oil pumping tank, and a closed one-way valve is arranged at the free end of the exhaust pipe.
, the sealing one-way valve includes a sealing plate, a vent hole on the sealing plate, and a sealing baffle hinged to the sealing plate for closing the vent hole, the sealing baffle opens in one way into the sealing plate.
, the balloon is an elastic rubber balloon.
And , the manual decompression bag, the oil pumping tank and the oil pumping pipe are all made of plastic materials.
The invention has the beneficial effects that: the device can easily control the required oil pumping amount, avoid the oil leakage phenomenon in the sampling process and avoid the problem of deterioration caused by the contact between the oil in the switch and the air in the sampling process. The invention also effectively ensures that the influence of air on the sample is reduced in the whole sampling process, and the accuracy of the final result is not shown due to the contact between oil and air.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.
Fig. 3 is a schematic structural diagram of embodiment 3 of the present invention.
Fig. 4 is a schematic view of a connection structure of the oil pumping pipe and the oil outlet pipe of the tap changer.
Fig. 5 is a schematic view of a manual decompression bladder.
Fig. 6 is a schematic structural view of the connecting rubber plug.
Wherein, 1 oil pumping box, 2 oil pumping pipe, 3 sampling barrel, 4 sampling pipe, 5 one-way valve, 6 diversion inclined plane, 7 observation window, 8 connecting rubber plug, 9 sealing boss, 10 bag body, 11 exhaust pipe, 12 air pumping pipe, 13 closing plate, 14 vent hole, 15 sealing baffle, 16 tap switch oil outlet pipe.
Detailed Description
The following description of at least exemplary embodiments is merely illustrative in nature and is in no way intended to limit the application, its application, or uses, as such embodiments are within the scope of the present application.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and one skilled in the art may make the analogy without departing from the spirit of the present application, and thus the present application is not limited to the specific embodiments disclosed below.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless otherwise specifically stated, it should be understood that the dimensions of the various parts illustrated in the drawings are not drawn to scale as actual for ease of description.
In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe the spatial relationship of devices or features to other devices or features as illustrated in the figures.
For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and therefore, should not be construed as limiting the scope of the present application.
Example 1
Referring to fig. 1 and 4-6, the main transformer tap changer oil taking auxiliary devices comprise an oil pumping tank 1, a manual decompression bag arranged at the top of the oil pumping tank 1, an oil pumping pipe 2 arranged at the bottom of the oil pumping tank 1 and a sampling device, wherein the sampling device comprises a sampling barrel 3, the sampling barrel 3 is communicated with the bottom of the oil pumping tank 1 through a sampling pipe 4, and a check valve 5 is arranged on the sampling pipe 4.
The oil pumping pipe 2 penetrates through the bottom of the oil pumping box 1 and extends into the oil pumping box 1, and the vertical height of the opening of the oil pumping pipe 2 in the oil pumping box 1 and the bottom surface of the oil pumping box 1 is 5-10 cm. The oil pumping pipe is higher than the bottom surface of the oil pumping box, so that oil pumped into the oil pumping box cannot flow back to an oil outlet of the tap switch, and secondary pollution to original oil in the tap switch cannot be caused in the oil taking process.
The free end of the oil pumping pipe 2, which is positioned at the bottom of the oil pumping box 1, is sleeved with a connecting rubber plug 8, and the cross section of the connecting rubber plug 8 is in an inverted trapezoid shape. The side wall of the connecting rubber plug 8 is uniformly provided with concentric annular sealing bosses 9. The connection rubber plug is integrally in an inverted cone frustum shape and can be inserted into an oil outlet of the tapping switch, the annular sealing boss arranged on the inclined plane of the cone frustum can effectively seal the oil outlet, oil leakage is prevented, and meanwhile, the oil in the tapping switch is prevented from contacting with air, so that the quality is not affected.
The manual decompression bag comprises a bag body 10, an exhaust pipe 11 arranged at the top end of the bag body 10 and an exhaust pipe 12 arranged at the bottom end of the bag body 10, wherein the exhaust pipe 12 is communicated with a top plate of the oil pumping box 1; the free end of the extraction pipe 12 is provided with a closed one-way valve. The manual pressure reducing valve can pump air out of the oil pumping box, and the closed one-way valve can only be opened to the exhaust pipe opening.
The closed one-way valve comprises a closing plate 13, a vent hole 14 arranged on the closing plate 13 and a closed baffle 15 hinged with the closing plate 13 and used for closing the vent hole 14; the closing baffle 15 is opened in one direction into the closing plate 13. The vent hole on the closing plate can exhaust air from the oil pumping box, when the saccule is squeezed, the saccule is compressed, the air is exhausted by the exhaust pipe, the area of the closing baffle plate is larger than that of the vent hole, and the closing baffle plate is hinged with the closing plate, so that the air cannot be squeezed into the oil pumping box. When the saccule is loosened, the sealing baffle is opened, and the air in the oil pumping tank is discharged.
The bladder 10 is an elastic rubber balloon. The manual decompression bag, the oil pumping box 1 and the oil pumping pipe 2 are all made of plastic materials.
When the oil pumping device is used, the connecting rubber plug is plugged into the oil outlet 16 of the tap switch to extrude the manual decompression bag, negative pressure is formed in the oil pumping box at the moment, and because the sampling pipe is provided with the one-way valve and the manual decompression bag is also provided with the closed one-way valve, oil in the tap switch is sucked into the oil pumping box. The sucked oil flows into the sampling barrel through the sampling tube and the one-way valve, the contact between the oil and air is reduced in the whole process, and the oil in the sampling barrel can accurately reflect the electrical performance of an oil sample in the tap changer.
Example 2
With reference to fig. 2, the difference from embodiment 1 is that a flow guiding inclined plane 6 is disposed at the bottom of the oil pumping box 1, an opening of the oil pumping pipe 2 in the oil pumping box 1 is located on the flow guiding inclined plane 6, and the flow guiding inclined plane 6 is inclined from the oil pumping pipe 2 side to the sampling pipe 4 side from high to low.
Example 3
Referring to fig. 3, the present embodiment is different from embodiment 2 only in that an observation window 7 is disposed on a sidewall of the sampling barrel 3, and volume indication scale lines are disposed on the observation window 7. The observation window and the scale mark can be used to observe the oil mass in the sampling bucket, make things convenient for operating personnel to operate, guarantee to obtain the oil mass that the experiment required.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
- The main transformer tap changer oil taking auxiliary device is characterized by comprising an oil pumping box (1), a manual pressure reducing bag arranged at the top of the oil pumping box (1), an oil pumping pipe (2) arranged at the bottom of the oil pumping box (1) and a sampling device, wherein the sampling device comprises a sampling barrel (3), the sampling barrel (3) is communicated with the bottom of the oil pumping box (1) through a sampling pipe (4), and a one-way valve (5) is arranged on the sampling pipe (4).
- 2. The auxiliary oil extraction device for the main transformer tap changer according to claim 1, wherein the oil extraction pipe (2) extends through the bottom of the oil extraction tank (1) and into the oil extraction tank (1), and the vertical height of the opening of the oil extraction pipe (2) in the oil extraction tank (1) and the bottom surface of the oil extraction tank (1) is 5-10 cm.
- 3. The auxiliary oil extraction device of main transformer tap changer according to claim 2, wherein the bottom of the oil pumping box (1) is provided with a diversion slope (6), the opening of the oil pumping pipe (2) in the oil pumping box (1) is located on the diversion slope (6), and the diversion slope (6) is inclined from high to low from the side of the oil pumping pipe (2) to the side of the sampling pipe (4).
- 4. The main transformer tap changer oil extraction auxiliary device of claim 1, wherein an observation window (7) is arranged on the side wall of the sampling barrel (3), and volume indication scale marks are arranged on the observation window (7).
- 5. The auxiliary oil extraction device for the main transformer tap changer according to claim 1, wherein a connection rubber plug (8) is sleeved on a free end of the oil extraction pipe (2) at the bottom of the oil extraction tank (1), and the cross section of the connection rubber plug (8) is in an inverted trapezoid shape.
- 6. auxiliary device for tapping of main transformer tap changer according to claim 5, characterized in that the side wall of the connection rubber plug (8) is uniformly provided with concentric annular sealing bosses (9).
- 7. The main transformer tap changer oil extraction auxiliary device according to claim 1, wherein the manual pressure reduction bag comprises a bag body (10), an exhaust pipe (11) arranged at the top end of the bag body (10), and an exhaust pipe (12) arranged at the bottom end of the bag body (10), the exhaust pipe (12) is communicated with a top plate of the oil extraction tank (1), and a closed one-way valve is arranged at the free end of the exhaust pipe (12).
- 8. The auxiliary device for tapping of main transformer tap changer according to claim 7, wherein the sealing check valve comprises a sealing plate (13), a vent hole (14) provided on the sealing plate (13), and a sealing baffle (15) hinged to the sealing plate (13) for closing the vent hole (14), the sealing baffle (15) being opened in one direction into the sealing plate (13).
- 9. A main transformer tap changer oil extraction auxiliary device according to claim 1, wherein the bladder (10) is an elastic rubber balloon.
- 10. The auxiliary oil extraction device of main transformer tap changer of claim 1, wherein the manual pressure reducing bag, the oil pumping tank (1) and the oil pumping pipe (2) are all made of plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910980940.4A CN110736646B (en) | 2019-10-16 | 2019-10-16 | Oil taking auxiliary device of main transformer tap switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910980940.4A CN110736646B (en) | 2019-10-16 | 2019-10-16 | Oil taking auxiliary device of main transformer tap switch |
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| Publication Number | Publication Date |
|---|---|
| CN110736646A true CN110736646A (en) | 2020-01-31 |
| CN110736646B CN110736646B (en) | 2022-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910980940.4A Active CN110736646B (en) | 2019-10-16 | 2019-10-16 | Oil taking auxiliary device of main transformer tap switch |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100974860B1 (en) * | 2010-05-10 | 2010-08-11 | 이명수 | Apparatus and method for measuring insulating oil of transformer |
| CN201850457U (en) * | 2010-04-30 | 2011-06-01 | 珠海松田电工有限公司 | Automatic liquid level control device for enameled wire lubricating oil |
| CN202485940U (en) * | 2012-03-02 | 2012-10-10 | 山西省电力公司电力科学研究院 | Oil sampling device for transformer |
| CN104008858A (en) * | 2014-05-09 | 2014-08-27 | 昆山佑翔电子科技有限公司 | Fake-oil-level-preventing capsule-type transformer oil conservator |
| CN203839158U (en) * | 2014-04-14 | 2014-09-17 | 丹阳市金诺电器有限公司 | Oil-oil bushing used inside oil-immersed transformer |
| CN105758674A (en) * | 2016-04-19 | 2016-07-13 | 马树布 | Sampling device and sampling method of electric locomotive transformer oil |
| CN205569831U (en) * | 2016-03-31 | 2016-09-14 | 昆明纳太科技有限公司 | Vapor -liquid separation device , filtrating circulation negative pressure system and paper machine |
| CN109637859A (en) * | 2018-12-14 | 2019-04-16 | 广东电网有限责任公司 | A kind of sub-connecting switch of transformer tool for drawing oil sample |
-
2019
- 2019-10-16 CN CN201910980940.4A patent/CN110736646B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201850457U (en) * | 2010-04-30 | 2011-06-01 | 珠海松田电工有限公司 | Automatic liquid level control device for enameled wire lubricating oil |
| KR100974860B1 (en) * | 2010-05-10 | 2010-08-11 | 이명수 | Apparatus and method for measuring insulating oil of transformer |
| CN202485940U (en) * | 2012-03-02 | 2012-10-10 | 山西省电力公司电力科学研究院 | Oil sampling device for transformer |
| CN203839158U (en) * | 2014-04-14 | 2014-09-17 | 丹阳市金诺电器有限公司 | Oil-oil bushing used inside oil-immersed transformer |
| CN104008858A (en) * | 2014-05-09 | 2014-08-27 | 昆山佑翔电子科技有限公司 | Fake-oil-level-preventing capsule-type transformer oil conservator |
| CN205569831U (en) * | 2016-03-31 | 2016-09-14 | 昆明纳太科技有限公司 | Vapor -liquid separation device , filtrating circulation negative pressure system and paper machine |
| CN105758674A (en) * | 2016-04-19 | 2016-07-13 | 马树布 | Sampling device and sampling method of electric locomotive transformer oil |
| CN109637859A (en) * | 2018-12-14 | 2019-04-16 | 广东电网有限责任公司 | A kind of sub-connecting switch of transformer tool for drawing oil sample |
Non-Patent Citations (2)
| Title |
|---|
| 侯林高: "如何提高变压器油样试验合格率", 《广东科技》 * |
| 郝晋堂等: "变压器用油颗粒度测试取样装置开发方法及装置研究", 《山西电力》 * |
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