CN110736646B - 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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- CN110736646B CN110736646B CN201910980940.4A CN201910980940A CN110736646B CN 110736646 B CN110736646 B CN 110736646B CN 201910980940 A CN201910980940 A CN 201910980940A CN 110736646 B CN110736646 B CN 110736646B
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- 238000005086 pumping Methods 0.000 claims abstract description 81
- 238000005070 sampling Methods 0.000 claims abstract description 43
- 238000007789 sealing Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 2
- 230000006837 decompression Effects 0.000 abstract description 9
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 238000004804 winding Methods 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 210000005077 saccule Anatomy 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Physics & Mathematics (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention relates to a main transformer tap switch 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 oil pumping pipe is arranged at the bottom of the oil pumping box; sampling device includes the sampling bucket, the sampling bucket passes through the bottom intercommunication of sampling tube and oil pumping case, be provided with the check valve on the sampling tube. The invention is easy to control the oil absorption, avoids the contact between the oil sample and the air and has good sampling effect.
Description
Technical Field
The invention relates to the technical field of power transmission and transformation, in particular to an oil taking auxiliary device of a main transformer tap changer.
Background
Power transformers are one of the main devices of power plants and substations. The transformer has the functions of increasing voltage to transmit electric energy to an electricity utilization area in many aspects, and reducing the voltage to use voltages of all levels to meet the requirement of electricity utilization. In any case, both the step-up and step-down must be done by a transformer. In the process of transmitting electric energy in a power system, voltage loss and power loss are necessarily generated, wherein the voltage loss is inversely proportional to the voltage when the same power is transmitted, and the power loss is inversely proportional to the square of the voltage. The voltage is increased by the transformer, and the power transmission loss is reduced.
The transformer is composed of two or more coil windings wound on the same iron core, and the windings are connected through an alternating magnetic field and work according to the electromagnetic induction principle. The installation position of the transformer is convenient to operate, overhaul and transport, and a safe and reliable place is selected. When using a transformer, the rated capacity of the transformer must be selected reasonably. When the transformer operates in no-load operation, larger reactive power is needed. These reactive powers are to be supplied by the power supply system. If the capacity of the transformer is selected to be too large, not only is the initial investment increased, but also the transformer is enabled to be in idle load or light load operation for a long time, the proportion of idle load loss is increased, the power factor is reduced, the network loss is increased, and the operation is not economical or unreasonable. The transformer capacity is selected to be too small, so that the transformer is overloaded for a long time and is easy to damage equipment. Therefore, the rated capacity of the transformer should be selected according to the requirements of the electrical load, and should not be too large or too small.
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. An oil level gauge: the oil level state of the transformer is reflected, generally about +20O, oil drainage is needed when the oil level is too high, and oil is added when the oil level is too low; in winter, the oil level is not changed greatly when the temperature is low and the load is light, or the oil level is slightly reduced; in summer, the oil temperature rises when the load is heavy, and the oil level slightly rises; 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 an auxiliary oil taking device of a main transformer tap changer, which is easy to control oil absorption, avoids contact between an oil sample and air and has a good sampling effect.
The invention adopts the following technical scheme:
a 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; sampling device includes the sampling bucket, the sampling bucket passes through the bottom intercommunication of sampling tube and oil pumping case, be provided with the check valve on the sampling tube.
Furthermore, 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.
Furthermore, a flow guide inclined plane is arranged at the bottom of the oil pumping box, an 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 one side of the oil pumping pipe to one side of the sampling pipe.
Further, the sampling bucket lateral wall is provided with the observation window, be provided with volume indication scale mark on the observation window.
Furthermore, a connecting rubber plug is sleeved at the free end of the oil pumping pipe, which is positioned at the bottom of the oil pumping tank, and the section of the connecting rubber plug is in an inverted trapezoid shape.
Furthermore, concentric annular sealing bosses are uniformly arranged on the side wall of the connecting rubber plug.
Further, 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, and 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.
Further, the closed one-way valve comprises a closing plate, a vent hole formed in the closing plate and a closed baffle hinged with the closing plate and used for closing the vent hole; the closed baffle is opened towards the inside of the closed plate in a one-way mode.
Further, the balloon body is an elastic rubber balloon.
Furthermore, 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 impression of the accuracy of the final result due to the contact of oil and air is prevented.
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 technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection 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 it will be apparent to those of ordinary skill in the art that 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 the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
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 … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted 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 "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.
Example 1
Referring to fig. 1 and 4-6, an auxiliary device for taking oil from a main transformer tap changer comprises 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; sampling device includes sampling bucket 3, sampling bucket 3 passes through sampling tube 4 and the bottom intercommunication of taking out oil tank 1, be provided with check valve 5 on the sampling tube 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 into 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 surface 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 surface 6, and the flow guiding inclined surface 6 is inclined from the oil pumping pipe 2 side to the sampling pipe 4 side from high to low. Through the water conservancy diversion inclined plane for the oil that is inhaled can be more smooth get into the sampling bucket in, avoid the formation of pumping-out incasement to deposit oil.
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 (3)
1. A 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; 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);
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 between 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 bottom of the oil pumping box (1) is provided with a flow guide inclined plane (6), the opening of the oil pumping pipe (2) in the oil pumping box (1) is positioned on the flow guide inclined plane (6), and the flow guide inclined plane (6) inclines from high to low from one side of the oil pumping pipe (2) to one side of the sampling pipe (4);
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);
the free end of the oil pumping pipe (2) positioned at the bottom of the oil pumping box (1) is sleeved with a connecting rubber plug (8), and the section of the connecting rubber plug (8) is in an inverted trapezoid shape;
concentric annular sealing bosses (9) are uniformly arranged on the side wall of the connecting rubber plug (8);
the manual pressure reducing 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); a closed one-way valve is arranged at the free end of the exhaust pipe (12);
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 to the inside of the closing plate (13).
2. A main transformer tap changer oil pick-up assist device as claimed in claim 1, wherein the bladder (10) is an elastic rubber bladder.
3. The main transformer tap changer oil extraction auxiliary device 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 materials.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110736646A CN110736646A (en) | 2020-01-31 |
| CN110736646B true 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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Family Cites Families (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 |
| CN104008858B (en) * | 2014-05-09 | 2016-05-25 | 昆山佑翔电子科技有限公司 | Prevent the capsule-type installation for transformer of false oil level |
| 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 |
| CN109637859B (en) * | 2018-12-14 | 2024-05-03 | 广东电网有限责任公司 | Transformer tapping switch tool for taking oil samples |
-
2019
- 2019-10-16 CN CN201910980940.4A patent/CN110736646B/en active Active
Non-Patent Citations (2)
| Title |
|---|
| 变压器用油颗粒度测试取样装置开发方法及装置研究;郝晋堂等;《山西电力》;20130815(第04期);63-66 * |
| 如何提高变压器油样试验合格率;侯林高;《广东科技》;20080825(第16期);65 * |
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