An intelligent detection device for transformer oil insulation strength

Abstract

The present invention belongs to the technical field of electric power equipment, and in particular, is an intelligent transformer oil insulation strength detection device, comprising a main body with an opening upward and a barrel-shaped structure, a notch in the middle of the bottom end of the main body, and a U-shaped cardboard with an opening downward is clamped in the notch, a driving motor is fixed to the top of the U-shaped cardboard, and the output shaft of the driving motor passes through the U-shaped cardboard and is fixed to a transmission rod, and a propeller blade is arranged at the bottom end of the transmission rod. When the present invention is used, when the device is inserted into the transformer oil tank for detection, the vegetable oil in the transformer oil tank can be fully disturbed by the stirring of the propeller blades and the diversion of the herringbone liquid separation plate to avoid stratification of the oil in the oil tank. At this time, the detection result can represent the overall insulation performance of the internal oil. The test is convenient, and the oil sample can be tested by directly inserting it. It has the advantages of adjustable temperature, adjustable vacuum, adjustable voltage, adjustable electrode spacing and electrode shape, and is portable, compact, and uses less oil.

Description

Technical Field

[0001] The invention relates to the technical field of electric power equipment, and in particular to an intelligent detection device for transformer oil insulation strength. Background Art

[0002] Vegetable insulating oil is made from natural oil crops through pressing, refining and modification processes. It has good electrical properties, high ignition point, a wide source of raw materials, and has the advantages of being renewable and biodegradable. The insulation system of oil-immersed transformers is oil-paper insulation, and the performance of oil-paper insulation directly affects the operating safety and life of oil-immersed transformers.

[0003] Nowadays, when conducting aging tests on transformer oil (insulating oil), samples of oil at different depths in the oil tank are taken for testing. Traditional testing methods require taking out the oil sample first and then pouring it into a special oil cup for testing. This method is cumbersome and not convenient and fast enough. In addition, the testing device is usually large in size, not portable, and has a single testing function. Therefore, an intelligent transformer oil insulation strength testing device is needed to solve the above problems. Summary of the invention

[0004] In order to overcome the above problems existing in the prior art, the present invention provides an intelligent detection device for transformer oil insulation strength.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an intelligent transformer oil insulation strength detection device, comprising a main body with an opening upward and a barrel-shaped structure, a notch is opened in the middle of the bottom end of the main body, and a U-shaped card plate with an opening downward is clamped in the notch, a driving motor is fixed to the top of the U-shaped card plate, and the output shaft of the driving motor passes through the U-shaped card plate and is fixed with a transmission rod, a spiral blade is arranged at the bottom end of the transmission rod, legs with an opening upward and a barrel-shaped structure are fixed on both sides of the lower surface of the main body near the notch, and a herringbone liquid separation plate is fixed on the lower surface of the spiral blade between the two legs, a collecting barrel with an opening upward and a rectangular barrel structure is fixed on the opposite side of the two legs near the herringbone liquid separation plate, and coaxially distributed screw holes are respectively opened on the inner walls of the collecting barrel on both sides, studs are screwed in the two screw holes, and conductive gaskets are fixed on the opposite ends of the two studs, and wires are fixed on the opposite ends of the two studs, and the top of the wire is connected in series with a light bulb, an ammeter and a power supply.

[0006] As a preferred solution in the present invention, the opposite sides of the two legs are both configured as arc-shaped surfaces, and the diameter of the cylindrical geometric body formed by the two arc-shaped surfaces is equal to the outer diameter of the main body.

[0007] As a preferred solution in the present invention, a convex head with a hemispherical structure is fixed between the bottom ends of the two legs.

[0008] As a preferred solution in the present invention, a bump is fixed on one side opposite to the two conductive gaskets, and the two bumps have a pointed shape on one side opposite to the two conductive gaskets.

[0009] As a preferred solution in the present invention, the ends of the two legs on the opposite side close to the screw hole are provided with through holes with a diameter larger than the diameter of the screw hole, and the lower surface of the main pipe body close to the top of the two legs is provided with wire holes matching the diameter of the wire, and a sealing ring is clamped in the wire hole.

[0010] As a preferred solution in the present invention, a rubber stopper is sleeved on the circumferential outer wall of the main body near the top, and a retaining ring is fixed on the circumferential outer wall of the rubber stopper near the top, the diameter of the retaining ring is larger than the diameter of the detection port, and the outer wall of the rubber stopper forms an interference fit with the inner wall of the detection port.

[0011] As a preferred solution in the present invention, a wire harness clamp is fixed to the inner wall of the main pipe body above the two wire holes, and a wire groove is provided in the middle of the wire harness clamp.

[0012] As a preferred solution of the present invention, a current knob is provided on a side of the power supply away from the inside of the main pipe.

[0013] As a preferred solution in the present invention, the inner wall of one side of the two legs close to the aggregate barrel is fixed with zigzag-shaped heat-conducting rods, and the heating end of the heat-conducting rod is provided with a heater, which is connected to the voltage output end of the power supply through a wire.

[0014] In summary, the beneficial effects of this solution are:

[0015] 1. This intelligent transformer oil insulation strength detection device is easy to test. It can be tested by directly inserting the oil sample, without the traditional method of taking out the oil sample and pouring it into a special oil cup. It has the advantages of adjustable temperature, adjustable vacuum, adjustable voltage, adjustable electrode spacing and electrode shape, and is portable, compact, and consumes less oil.

[0016] 2. The intelligent transformer oil insulation strength detection device, through the spiral blades arranged at the bottom end of the transmission rod at the bottom end of the main body, can fully disturb the vegetable oil in the transformer oil tank through the stirring of the spiral blades and the diversion of the herringbone liquid separation plate when the device is inserted into the transformer oil tank for detection, so as to avoid stratification of the oil in the oil tank. At this time, the detection result can represent the overall insulation performance of the internal oil;

[0017] 3. This intelligent transformer oil insulation strength detection device, through the two conductive pads close to each other and powered by the power supply, can supply power to the circuit through the power supply until the breakdown voltage is reached. At this time, the aging insulation degree of the vegetable oil can be obtained by observing the reading of the ammeter and the brightness of the bulb. If it does not meet the design specifications, it will be replaced or dehumidified;

[0018] 4. This intelligent transformer oil insulation strength detection device is provided with pointed bumps on the opposite sides, which facilitates centralized discharge, improves the device's penetration effect on the intermediate oil, and improves the detection visibility;

[0019] 5. This intelligent transformer oil insulation strength detection device can heat the liquid to be tested clamped in the middle when in use, through the heat-conducting rods and the heaters used in conjunction with them arranged on both sides of the oil to be tested, so as to detect the insulation performance of the vegetable oil under heating and perform aging tests on various performances of the vegetable oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic cross-sectional view of an intelligent transformer oil insulation strength detection device proposed by the present invention;

[0021] Figure 2 This is a schematic diagram of the overall structure of the main body of an intelligent transformer oil insulation strength detection device proposed by the present invention;

[0022] Figure 3 The invention proposes an intelligent detection device for transformer oil insulation strength Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 4 A schematic diagram of a half-section three-dimensional structure of an intelligent transformer oil insulation strength detection device proposed by the present invention;

[0024] Figure 5 It is a schematic cross-sectional structural diagram of an intelligent transformer oil insulation strength detection device proposed in the second embodiment of the present invention.

[0025] In the figure: 1 main body, 2 notch, 3 wire hole, 4 propeller blade, 5 leg, 6 through hole, 7 aggregate barrel, 8 protrusion, 9 vegetable oil to be tested, 10 conductive gasket, 1001 stud, 1002 bump, 11 herringbone liquid separation plate, 12 transmission rod, 13 U-shaped card plate, 14 drive motor, 15 harness card plate, 16 light bulb, 17 ammeter, 18 current knob, 19 power supply, 20 rubber plug, 21 heater, 22 heat conducting rod, 23 wire. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] Example 1

[0029] Reference Figure 1-4 , an intelligent transformer oil insulation strength detection device, comprising a main body 1 with an opening upward and a barrel-shaped structure, a notch 2 is opened in the middle of the bottom end of the main body 1, and a U-shaped card plate 13 with an opening downward is clamped in the notch 2, a driving motor 14 is fixed to the top of the U-shaped card plate 13, and the output shaft of the driving motor 14 passes through the U-shaped card plate 13 and is fixed with a transmission rod 12, and a spiral blade 4 is arranged at the bottom end of the transmission rod 12, and legs 5 with an opening upward and a barrel-shaped structure are fixed on both sides of the lower surface of the main body 1 near the notch 2, and a herringbone liquid separation plate 11 is fixed between the two legs 5 and the lower surface of the spiral blade 4, so that when the device is extended into the transformer tank for detection during use, the vegetable oil in the transformer tank can be fully disturbed by the stirring of the spiral blade 4 and the diversion of the herringbone liquid separation plate 11 to avoid the oil in the tank from being generated. Layered, the test result at this time can indicate the overall insulation performance of the internal oil, a collecting barrel 7 with an opening upward and a rectangular barrel structure is fixed on the opposite side of the two legs 5 near the bottom of the herringbone liquid separation plate 11, and the inner walls on the opposite sides of the collecting barrel 7 are respectively provided with coaxially distributed screw holes, and studs 1001 are screwed in the two screw holes, and conductive gaskets 10 are fixed on the opposite ends of the two studs 1001, and wires 23 are fixed on the opposite ends of the two studs 1001, and the top of the wire 23 is connected in series with a light bulb 16, an ammeter 17 and a power supply 19, so that the circuit can be powered by the power supply 19 when in use until the breakdown voltage is reached. At this time, the aging insulation degree of the vegetable oil can be obtained by observing the reading of the ammeter 17 and the brightness of the light bulb 16. If it does not meet the design specifications, it should be replaced or dehumidified.

[0030] In the present invention, the opposite sides of the two legs 5 are both configured as arc-shaped surfaces, and the diameter of the cylindrical geometric body formed by the two arc-shaped surfaces is equal to the outer diameter of the main body 1, ensuring that the main body 1 and the legs 5 form a cylindrical structure with a smooth appearance, which facilitates the device to smoothly pass through the detection port and directly insert into the bottom inner wall of the oil tank.

[0031] A hemispherical protrusion 8 is fixed between the bottom ends of the two legs 5 to facilitate the overall insertion of the device into the oil tank.

[0032] Among them, the two conductive gaskets 10 are fixed with protrusions 1002 on the opposite sides, and the two protrusions 1002 are configured to be pointed on the opposite sides, which is convenient for concentrated discharge, improves the penetration effect of the device on the intermediate oil, and improves the detection visibility.

[0033] Among them, the ends of the two legs 5 on the opposite side near the screw holes are each provided with a through hole 6 with a diameter larger than the diameter of the screw hole, and the lower surface of the main pipe 1 near the top of the two legs 5 is provided with a wire hole 3 that is adapted to the diameter of the wire 23, and a sealing ring is clamped in the wire hole 3.

[0034] Among them, a rubber stopper 20 is sleeved on the circumferential outer wall of the main body 1 near the top, and a retaining ring is fixed on the circumferential outer wall of the rubber stopper 20 near the top. The diameter of the retaining ring is larger than the diameter of the detection port. The outer wall of the rubber stopper 20 forms an interference fit with the inner wall of the detection port, so that when in use, it can be ensured that the rubber stopper 20 tightly fills the detection port to prevent a large amount of air from being poured in to reduce the later air extraction process.

[0035] Among them, the inner wall of the main pipe body 1 is fixed with a wire harness card 15 above the two wire holes 3, and a wire groove is set in the middle of the wire harness card 15. The wire 23 passes through the wire harness card 15, which is convenient for wiring. Secondly, a sealed insulating plate can be set here to improve the safety performance of the device.

[0036] Among them, a current knob 18 is provided on the side of the power supply 19 away from the inside of the main pipe 1, and the voltage can be continuously adjusted during use until the vegetable oil of the test thickness is broken through, which is convenient for detection.

[0037] Working principle: before use, open the detection port cover first, then insert the device into it until the bottom of the leg 5 almost reaches the bottom of the oil tank, then insert the rubber plug 20 into the detection port, and finally insert the device into the transformer tank for detection, start the drive motor 14 to drive the propeller blade 4 to stir through the transmission rod 12, and cooperate with the herringbone separator plate 11 to fully disturb the vegetable oil in the transformer tank to avoid stratification of the oil in the tank. At this time, the test result can indicate the overall insulation performance of the internal oil. At this time, power is supplied to the circuit through the power supply 19 until the breakdown voltage is reached. At this time, the aging insulation degree of the vegetable oil can be obtained by observing the reading of the ammeter 17 and the brightness of the bulb 16. If it does not meet the design specifications, it should be replaced or dehumidified.

[0038] Example 2

[0039] Reference Figure 5 , an intelligent detection device for transformer oil insulation strength. Compared with Example 1, this embodiment also includes two legs 5, and the inner wall of one side close to the aggregate barrel 7 is fixed with a zigzag distribution of heat-conducting rods 22, and the heating end of the heat-conducting rod 22 is provided with a heater 21, and the heater 21 is connected to the voltage output end of the power supply 19 through a wire, so that when in use, the liquid to be tested clamped in the middle can be heated to detect the insulation performance of the vegetable oil under heating and perform aging tests on various performances of the vegetable oil.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An intelligent transformer oil insulation strength detection device, comprising a main body (1) with an upward opening and a barrel-shaped structure, a notch (2) is provided in the middle of the bottom end of the main body (1), and a U-shaped cardboard (13) with an opening facing downward is clamped in the notch (2), characterized in that: A driving motor (14) is fixed to the top of the U-shaped card plate (13), and the output shaft of the driving motor (14) passes through the U-shaped card plate (13) and is fixed to a transmission rod (12), and a propeller blade (4) is arranged at the bottom end of the transmission rod (12), and legs (5) with an upward opening and a barrel-shaped structure are fixed to both sides of the lower surface of the main pipe (1) near the notch (2), and a herringbone liquid separation plate (11) is fixed between the two legs (5) near the lower surface of the propeller blade (4), and the two legs (5) are opposite to each other on one side near the other. A collecting barrel (7) with an opening upward and a rectangular barrel structure is fixed below the herringbone liquid separation plate (11), and coaxially distributed screw holes are respectively opened on the inner walls of the collecting barrel (7) on both sides opposite to each other, studs (1001) are screwed into the two screw holes, and conductive gaskets (10) are fixed to the opposite ends of the two studs (1001), and wires (23) are fixed to the opposite ends of the two studs (1001), and the top of the wires (23) are connected in series with a light bulb (16), an ammeter (17) and a power supply (19).

2. The intelligent transformer oil insulation strength detection device according to claim 1 is characterized in that: The opposite sides of the two legs (5) are both configured as arc-shaped surfaces, and the diameter of the cylindrical geometric body formed by the two arc-shaped surfaces is equal to the outer diameter of the main body (1).

3. The intelligent transformer oil insulation strength detection device according to claim 2 is characterized in that: A convex head (8) with a hemispherical structure is fixed between the bottom ends of the two legs (5).

4. The intelligent transformer oil insulation strength detection device according to claim 1 is characterized in that: A protrusion (1002) is fixed on one side opposite to the two conductive gaskets (10), and the two protrusions (1002) are both configured to have a pointed shape on one side opposite to the other.

5. The intelligent transformer oil insulation strength detection device according to claim 1 is characterized in that: The ends of the two legs (5) on the opposite side close to the screw hole are each provided with a through hole (6) having a diameter larger than the diameter of the screw hole, and the lower surface of the main body (1) close to the top of the two legs (5) is provided with a wire hole (3) matching the diameter of the wire (23), and a sealing ring is clamped in the wire hole (3).

6. The intelligent transformer oil insulation strength detection device according to claim 1 is characterized in that: A rubber plug (20) is sleeved on the circumferential outer wall of the main pipe body (1) near the top, and a retaining ring is fixed on the circumferential outer wall of the rubber plug (20) near the top, the diameter of the retaining ring is larger than the diameter of the detection port, and the outer wall of the rubber plug (20) forms an interference fit with the inner wall of the detection port.

7. The intelligent transformer oil insulation strength detection device according to claim 1 is characterized in that: A wire harness clamp (15) is fixed to the inner wall of the main pipe body (1) above the two wire holes (3), and a wire groove is provided in the middle of the wire harness clamp (15).

8. The intelligent transformer oil insulation strength detection device according to claim 1 is characterized in that: A current knob (18) is provided on one side of the power supply (19) away from the interior of the main pipe (1).

9. The intelligent transformer oil insulation strength detection device according to claim 1 is characterized in that: A zigzag-shaped heat-conducting rod (22) is fixed to the inner wall of one side of the two legs (5) close to the aggregate barrel (7), and a heater (21) is provided at the heating end of the heat-conducting rod (22), and the heater (21) is connected to the voltage output end of the power supply (19) through a wire.

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