CN211785834U - Uneven thermal aging simulation device for insulating paper - Google Patents
Uneven thermal aging simulation device for insulating paper Download PDFInfo
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- CN211785834U CN211785834U CN201922196572.2U CN201922196572U CN211785834U CN 211785834 U CN211785834 U CN 211785834U CN 201922196572 U CN201922196572 U CN 201922196572U CN 211785834 U CN211785834 U CN 211785834U
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- insulating paper
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- thermal aging
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Abstract
The utility model relates to a transformer insulation diagnosis technical field specifically discloses an uneven thermal ageing analogue means of insulating paper, include: the inner part of the tank body is provided with an inner cavity, an oil drain pipe, a tank cover matched with a tank opening of the tank body, an inflation pipe, an exhaust pipe, an insulating paper fixing device, a first temperature sensor arranged in the insulating paper fixing device, a heating rod arranged at the center of the insulating paper fixing device, a circulating cooling device, a second temperature sensor and a controller. The utility model discloses an insulating paper fixing device is fixed with insulating paper successive layer surrounding in the heating rod, consequently formed one have the center to the horizontal direction's that spreads all around temperature gradient, take out the insulating oil of jar internal portion from the upper strata through circulating cooling device again and export back to the lower floor after the cooling, thereby the temperature gradient that provides a vertical direction and then simulated the true operational environment of insulating paper, make the relation of experimental data and true condition inseparabler, data more have convincing power, the accuracy is higher.
Description
Technical Field
The utility model belongs to the technical field of the transformer insulation diagnosis, in particular to uneven thermal ageing analogue means of insulating paper.
Background
The transformer is the most important power transformation equipment of a power system, and the safe and stable operation of the transformer is the foundation for ensuring the reliability of power supply. The failure of the transformer is mainly an overheating failure and a discharging failure. The insulation system of the oil-immersed transformer mainly comprises transformer oil and insulation paper, and in the running process of the transformer, the oil-paper insulation is subjected to the comprehensive action of external stress such as heat, electricity, machinery, chemistry and the like for a long time, and aging products such as moisture, water-soluble acid, furan compounds and the like can be generated, so that the insulation performance of the transformer is reduced, and the safe and stable running of the transformer is influenced. In actual operation's oily formula power transformer, inside oil circulation can encircle the vertical direction that causes and the ascending temperature gradient of horizontal direction cause oily insulating paper to produce inhomogeneous thermal ageing, in order to simulate the inhomogeneous thermal ageing process of insulating paper, need build the inhomogeneous ageing experiment platform that accords with actual operational environment, but current experimental facilities can't provide the temperature gradient that accords with actual conditions and simulate actual operational environment, cause the compactness of the relation that has reduced test data and true service environment and the accuracy of data.
Disclosure of Invention
An object of the utility model is to provide an uneven thermal ageing analogue means of insulating paper to overcome current experimental facilities and can't provide the temperature gradient that accords with actual conditions and simulate actual work environment's defect.
In order to achieve the above object, the utility model provides an uneven thermal aging analogue means of insulating paper, include: the oil tank comprises a tank body, wherein an inner cavity is formed in the tank body, one end of the inner cavity extends outwards from one end of the tank body to form a tank opening, and an oil discharge pipe communicated with the inner cavity is arranged at the other end of the tank body; the tank cover is matched with the tank opening, one side of the tank cover is provided with an inflation pipe and an exhaust pipe which are communicated with the other side of the tank cover, the tank cover is provided with an oil filling opening, and the oil filling opening is sealed through an oil cover; the insulation paper fixing device is arranged in the inner cavity and comprises a plurality of fixing cylinders which are sleeved with each other from inside to outside at certain intervals, a plurality of parting beads are arranged on the periphery of each fixing cylinder at intervals, the innermost fixing cylinder is sleeved on the heating rod, and a first temperature sensor is arranged on each fixing cylinder; and the circulating cooling device comprises a cooling pipe, an oil pump is connected in series on the cooling pipe, one end of the cooling pipe is communicated between one end of the fixed cylinder and the tank opening, the other end of the cooling pipe is communicated between the other end of the fixed cylinder and the other end of the inner cavity, a cooling fin is arranged on the cooling pipe, and a fan is arranged beside the cooling fin.
Preferably, in the technical scheme, a hoop is arranged between the tank body and the tank cover, and the hoop is used for locking the tank body and the tank cover mutually.
Preferably, in the above technical scheme, the insulation paper fixing device further includes a fixing frame fixed to the other end of the fixed cylinder, the fixing frame can pass through the tank opening and be placed at the other end of the inner cavity, one end of the heating rod is connected to the fixing frame in a threaded manner, and the other end of the heating rod extends outwards from one end of the fixed cylinder.
Preferably, in the above technical solution, the division bar and the heating rod are parallel to the axis of the fixed cylinder at the same time.
Preferably, in the above technical scheme, two opposite division bars on the same fixed cylinder are respectively provided with a guide groove, the guide grooves extend from one end of the fixed cylinder to the other end of the fixed cylinder, and at least three first temperature sensors are slidably arranged in the guide grooves.
Preferably, in the above technical solution, the fan is disposed outside the tank body through a fan bracket, and the position of the fan corresponds to the heat sink and can blow air toward the heat sink.
Preferably, in the above technical scheme, a plurality of universal wheels are arranged on the end face of the other end of the tank body.
Preferably, in the above technical scheme, the oil drain pipe, the gas filling pipe and the air exhaust pipe are all connected with valves.
Preferably, in the above technical scheme, a second temperature sensor is arranged on the inner wall of the inner cavity, and the second temperature sensor is located between one end of the fixed cylinder and the tank opening.
Preferably, in the above technical solution, it is characterized in that an insulating paper clip is disposed at one end of the fixed cylinder.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model provides a heating rod provides the heat source, and insulating paper passes through the solid fixed cylinder and surrounds around the heating rod from inside to outside successive layer, makes every layer of insulating paper different apart from the distance of heat source to the ascending temperature gradient of horizontal direction has been produced.
2. The circulating cooling device extracts oil above the inner cavity, cools the oil through the radiating fins and the fan and inputs the oil below the inner cavity, and therefore the oil temperature in the inner cavity generates a temperature gradient in the vertical direction.
3. The temperature of the oil temperature can be monitored in real time through the second temperature sensor, and the oil temperature can be changed by controlling the running condition of the fan when the oil temperature is too hot or too cold, so that the safe experimental environment is ensured.
Drawings
Fig. 1 is a structural diagram of the simulation apparatus for uneven thermal aging of insulating paper according to the present invention.
Fig. 2 is a structural view of a can body.
Fig. 3 is a structural view of the insulating paper fixing device.
Fig. 4 is a structural view of a division bar with a guide groove.
Fig. 5 is a schematic view of a control panel.
Description of the main reference numerals:
1-tank body, 2-tank cover, 3-fixed cylinder, 4-heating rod, 5-cooling pipe, 6-oil pump, 7-radiating fin, 8-fan, 9-hoop, 10-fixed frame, 11-inner cavity, 12-tank opening, 13-oil drain pipe, 14-universal wheel, 20-valve, 21-air charging pipe, 22-air exhaust pipe, 23-oil filling opening, 24-oil cover, 31-parting strip, 32-first temperature sensor, 33-guide groove, 34-insulating paper clip, 81-fan frame, 41-display screen, 42-heating start key, 43-heating temperature knob, 44-fan start key, 45-fan rotating speed knob, 46-oil pump start key, 47-oil pump rotating speed knob, 48-high temperature alarm indicator light, 49-low temperature alarm indicator light and 50-power-on switch.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.
As shown in fig. 1 to 5, the insulating paper non-uniform thermal aging simulation apparatus in this embodiment includes: the oil tank comprises a tank body 1, a tank cover 2, a fixed cylinder 3, a heating rod 4, a cooling pipe 5, an oil pump 6, a radiating fin 7, a fan 8, a clamp 9, a fixed frame 10, an inner cavity 11, a tank opening 12, an oil drain pipe 13, a universal wheel 14, a second temperature sensor 15, a valve 20, an inflation pipe 21, an exhaust pipe 22, an oil filling opening 23, an oil cover 24, a partition strip 31, a first temperature sensor 32, a guide groove 33, an insulating paper clamp 34 and a fan frame 81. The tank body 1 is cylindrical, a cylindrical inner cavity 11 coaxial with the tank body 1 is formed in the tank body 1, one end of the inner cavity 11 extends outwards from the top end of the tank body 1 to form a tank opening 12, an outer edge is annularly arranged on the outer side of the tank opening 12, an oil discharge pipe 13 is arranged on the side face, close to the bottom end, of the tank body 1, and the oil discharge pipe 13 is communicated with the inner cavity 11. The size of the tank cover 2 is matched with that of the tank opening 12, the tank opening 12 can be just covered, one side of the tank cover 2, which is back to the inner cavity 11, is provided with an inflation pipe 21 and an exhaust pipe 22, the inflation pipe 21 and the exhaust pipe 22 are communicated with one side of the tank cover 2, which is towards the inner cavity 11, the tank cover 2 is also provided with an oil filling opening 23 communicated with the two sides, and the oil filling opening 23 is covered with an oil cover 24 for sealing; the clamp 9 can cover the outer edge of the can opening 11 and the edge of the can lid 2 and then lock and seal. The insulating paper fixing device comprises a fixing cylinder 3, a heating rod 4 and a fixing frame 10, wherein the fixing cylinder 3 is formed by arranging a plurality of parting beads 31 at intervals in a ring shape, the axis of the fixing cylinder 3 is parallel to the direction of each parting bead 31, the length of each parting bead 31 is equal, the four fixing cylinders 3 are sleeved with each other from inside to outside, one end of each fixing cylinder is fixed on the fixing frame 10 at the same time, and a certain interval is reserved between every two fixing cylinders 3; three heating rods 4 with equal length are sleeved in the fixed cylinder 3 sleeved at the innermost part, one end of each heating rod 4 is connected with the fixed frame 10 through threads, and the other end of each heating rod 4 extends out of the other end of the fixed cylinder 3; a guide groove 33 is formed in the side surface of any two opposite division bars 31 on each fixed cylinder 3, the guide groove 33 faces the space between two adjacent division bars 31 on the same fixed cylinder 3, the guide groove 33 extends from one end of the fixed cylinder 3 to the other end of the fixed cylinder 3, three first temperature sensors 32 are mounted inside each guide groove 33, and the first temperature sensors 32 can move along the guide grooves 33 and are fixed at any positions; one of the division bars 31 of each fixed cylinder 3 is provided with an insulating paper clip 34. The circulating cooling device mainly comprises a cooling pipe 5, an oil pump 6, a radiating fin 7 and a fan 8; two cooling pipes 5 are symmetrically fixed on two sides of the tank body 1 in a C shape, one end of each cooling pipe 5 is fixed at a position close to the tank opening 12 and communicated to an area between one end of the fixed cylinder 3 and the tank opening 12; the other end of the cooling pipe 5 is fixed at a position close to the bottom of the tank body 1 and communicated between the other end of the fixed cylinder 3 and the other end of the inner cavity 11; each cooling pipe 5 is respectively connected with an oil pump 6 in series, and a plurality of radiating fins 7 arranged in the vertical direction are arranged at intervals in the middle area of the C shape finished by each cooling pipe 5; two fan brackets 81 are symmetrically arranged on two sides of the tank body 1, three fans 8 are respectively arranged on each fan bracket 81 at vertical intervals, the blades of the fans 8 are beside the radiating fins 7, and the fans 8 can blow air towards the radiating fins 7. A second temperature sensor is arranged on the side wall of the inner cavity 11, and the position of the second temperature sensor is between one end of the fixed cylinder 3 and the tank opening 12. Three universal wheels 14 are arranged at the bottom of the tank body 1. The oil drain pipe 13, the inflation pipe 21 and the exhaust pipe 22 are all connected with a valve 20 for controlling the shutoff.
With continued reference to fig. 5, the heating rod 4, the fan 8, the oil pump 6, the first temperature sensor 32 and the second temperature sensor are simultaneously connected to a controller, a control panel is provided on the controller, a display screen 41 for displaying the measurement data of each temperature sensor is respectively provided on the control panel, a heating start key 42 for controlling the heating rod 4 to be turned on, a heating temperature knob 43 for adjusting the heating temperature of the heating rod 4, a fan start key 44 for controlling the start and stop of the fan 8, a fan speed knob 45 for adjusting the speed of the fan 8, an oil pump start key 46 for controlling start and stop of the oil pump 6, an oil pump rotation speed knob 47 for adjusting the rotation speed of the oil pump 6, when the oil temperature is too high or too low, a high temperature alarm indicator lamp 48 and a low temperature alarm indicator lamp 49 which generate alarm signals, and a power-on switch 50 for controlling the power of the entire apparatus and controller to be turned on and off.
Next, a detailed description will be given of the operation method and the operation principle of the device for simulating uneven thermal aging of insulating paper in this embodiment, so that those skilled in the art can understand the present invention more:
1. the using method comprises the following steps:
firstly, adjusting the position of a first temperature sensor 32 on a guide groove 33, winding an insulation paper test sample on the outer side of each fixed cylinder 3, respectively winding a layer of insulation paper on the outer side of each fixed cylinder 3, and clamping and fixing the seam of the insulation paper through an insulation paper clamp 34;
step two, mounting the heating rod 4 on a fixed frame 10, placing the insulating paper fixing device filled with insulating paper in the tank body 1, changing the tank cover 2, and clamping by using a hoop 9, wherein all valves 20 in the device are in a closed state;
step three, opening the oil cover 24, and injecting insulating oil into the inner cavity 11 from the oil filling port 23, wherein the liquid level of the insulating oil needs to be higher than that of the second temperature sensor, and after the oil is added, the oil cover 24 is covered;
step four, in order to eliminate the influence of air bubbles attached to the surface of the insulating paper sample on experimental data, connecting the air exhaust pipe 22 with a vacuum pump, opening a valve 20 on the air exhaust pipe 22, exhausting, closing the valve 20 on the air exhaust pipe 22 after the air in the inner cavity 11 is exhausted, and detaching the vacuum pump;
step five, opening the valve 20 on the inflation tube 21 to a smaller opening degree, so that external air is slowly inflated into the inner cavity 11, and closing the valve 20 on the inflation tube 21 when the air pressure value in the inner cavity 11 is the same as the atmospheric pressure value;
step six, firstly turning on a power-on switch 50 to power on the whole device, then turning on a heating rod 4 through a heating start key 42, turning on a fan 8 through a fan start key 44, turning on an oil pump 6 through an oil pump start key 46, and further carrying out an aging test; in the test process, the temperature values measured by the measuring points of the temperature sensors are recorded by observing data displayed in the display screen 41; if the oil temperature is too high or too low in the test process, the high-temperature alarm indicator lamp 48 or the low-temperature alarm indicator lamp 49 can give an alarm, the oil temperature can be adjusted by heating the temperature knob 43, the fan rotating speed knob 45 and the oil pump rotating speed 47, and the oil temperature environment and the circulating flow rate of the insulating oil required by the experiment can be adjusted by the adjusting keys;
and step seven, after the experimental data is collected, closing the power-on switch, opening the valve 20 at the oil discharge pipe 13 to discharge the insulating oil in the cavity, sampling the insulating oil after the experiment, taking out the tested insulating paper sample, and performing the next experimental analysis.
2. The working principle is as follows: the insulating paper fixing ring device can vertically fix the insulating paper for testing according to the posture of the insulating paper during working, and the heating rod heats the inside of each insulating paper roll, so that a horizontal temperature gradient which is diffused from the center to the periphery is provided; the circulating cooling device can also pump out the insulating oil in the inner cavity 11 from the upper part, and the insulating oil is conveyed back to the cavity 11 from the bottom after being cooled, so that the oil temperature at the upper part of the insulating oil is high, the oil temperature at the lower part of the insulating oil is low, a temperature gradient in the vertical direction from top to bottom is further provided, and a test sample is placed between two pipe orifices of the cooling pipe 5, so that all parts of the test sample are ensured to be in the temperature gradient in the vertical direction; thereby simulating the real working environment of the insulating paper.
To sum up, the utility model discloses an insulating paper fixing device encircles the insulating paper successive layer in that the heating rod is fixed, has consequently formed one and has the center to the horizontal direction's that spreads all around temperature gradient, takes out the insulating oil of jar internal portion from the upper strata through circulating cooling device again and exports back to the lower floor after the cooling to the true operational environment who provides the temperature gradient of a vertical direction and then simulated the insulating paper, it is inseparabler to make the relation of experimental data and true conditions, and data more has convincing power, and the accuracy is higher.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (10)
1. A device for simulating uneven thermal aging of insulating paper is characterized by comprising:
the oil tank comprises a tank body (1), wherein an inner cavity (11) is formed in the tank body (1), one end of the inner cavity (11) extends outwards from one end of the tank body (1) to form a tank opening (12), and an oil discharge pipe (13) communicated with the inner cavity (11) is arranged at the other end of the tank body (1);
the tank cover (2) is matched with the tank opening (12), one side of the tank cover (2) is provided with an inflation pipe (21) and an exhaust pipe (22) which are communicated with the other side of the tank cover (2), the tank cover (2) is provided with an oil filling opening (23), and the oil filling opening (23) is sealed through an oil cover (24);
the insulation paper fixing device is arranged in the inner cavity (11), and comprises a plurality of fixing cylinders (3) which are sleeved with each other from inside to outside at certain intervals, a plurality of partition strips (31) are arranged on the periphery of each fixing cylinder (3) at intervals, the innermost fixing cylinder (3) is sleeved on the heating rod (4), and a first temperature sensor (32) is arranged on each fixing cylinder (3); and
the circulating cooling device comprises a cooling pipe (5), an oil pump (6) is connected in series on the cooling pipe (5), one end of the cooling pipe (5) is communicated to one end of the fixed cylinder (3) and between the tank openings (12), the other end of the cooling pipe (5) is communicated to the other end of the fixed cylinder (3) and between the other ends of the inner cavities (11), cooling fins (7) are arranged on the cooling pipe (5), and fans (8) are arranged beside the cooling fins (7).
2. Insulating paper non-uniform thermal ageing simulation device according to claim 1, characterized in that a clamp (9) is provided between the tank body (1) and the tank cover (2), the clamp (9) being used for locking the tank body (1) and the tank cover (2) to each other.
3. The insulating paper non-uniform thermal aging simulation device according to claim 1, characterized in that the insulating paper fixing device further comprises a fixing frame (10) fixed with the other end of the fixing cylinder (3), the fixing frame (10) can pass through the tank opening (12) and be placed at the other end of the inner cavity (11), one end of the heating rod (4) is connected to the fixing frame (10) in a threaded manner, and the other end of the heating rod (4) extends outwards from one end of the fixing cylinder (3).
4. The insulating paper non-uniform thermal aging simulation device according to claim 1, wherein the division bar (31) and the heating rod (4) are simultaneously parallel to the axis of the fixed cylinder (3).
5. The insulation paper non-uniform thermal aging simulation device according to claim 1, wherein two of the division bars (31) opposite to each other on the same fixed cylinder (3) are provided with a guide groove (33), the guide grooves (33) extend from one end of the fixed cylinder (3) to the other end of the fixed cylinder (3), and at least three first temperature sensors (32) are slidably disposed in the guide grooves (33).
6. The insulation paper non-uniform thermal aging simulation device according to claim 1, wherein the fan (8) is provided outside the can body (1) through a fan case (81), and the fan (8) is positioned corresponding to the heat sink (7) and is capable of blowing air toward the heat sink (7).
7. The insulating paper non-uniform thermal aging simulation device according to claim 1, wherein a plurality of universal wheels (14) are provided on an end surface of the other end of the can body (1).
8. The insulating paper non-uniform thermal aging simulation device according to claim 1, wherein valves (20) are connected to the oil drain pipe (13), the gas filling pipe (21) and the air exhaust pipe (22).
9. The insulation paper non-uniform thermal aging simulation device according to claim 1, wherein a second temperature sensor is provided on an inner wall of the inner cavity (11), the second temperature sensor being located between one end of the fixed cylinder (3) and the tank opening (12).
10. The insulation paper non-uniform thermal aging simulation device according to claim 1, wherein one end of the fixed cylinder (3) is provided with an insulation paper clip (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922196572.2U CN211785834U (en) | 2019-12-10 | 2019-12-10 | Uneven thermal aging simulation device for insulating paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922196572.2U CN211785834U (en) | 2019-12-10 | 2019-12-10 | Uneven thermal aging simulation device for insulating paper |
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| Publication Number | Publication Date |
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| CN211785834U true CN211785834U (en) | 2020-10-27 |
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| CN201922196572.2U Active CN211785834U (en) | 2019-12-10 | 2019-12-10 | Uneven thermal aging simulation device for insulating paper |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113448361A (en) * | 2021-06-08 | 2021-09-28 | 北京联合大学 | Temperature control system for simulating insulation impact load of traction transformer |
| CN113866213A (en) * | 2021-09-15 | 2021-12-31 | 广东电网有限责任公司广州供电局 | Transformer oil local temperature rise simulation test device based on laser heating principle |
-
2019
- 2019-12-10 CN CN201922196572.2U patent/CN211785834U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113448361A (en) * | 2021-06-08 | 2021-09-28 | 北京联合大学 | Temperature control system for simulating insulation impact load of traction transformer |
| CN113866213A (en) * | 2021-09-15 | 2021-12-31 | 广东电网有限责任公司广州供电局 | Transformer oil local temperature rise simulation test device based on laser heating principle |
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