A breakdown device for insulating oil

Abstract

The utility model provides a kind of for insulating oil's breakdown device, including oil bath bucket and two breakdown mechanisms;Two breakdown mechanisms are symmetrically arranged in the left and right sides of oil bath bucket, and oil bath bucket is used to contain oil liquid to be measured;Breakdown mechanism includes tungsten electrode stick, sealing structure and adjusting mechanism, and the inner end of tungsten electrode stick is arranged in the inboard of oil bath bucket, and the outer end of tungsten electrode stick is connected with adjusting mechanism;The inner end of tungsten electrode stick of two breakdown mechanisms is oppositely arranged in mirror image symmetry, and the gap between the inner end of tungsten electrode stick of two breakdown mechanisms forms discharge gap for the breakdown of oil liquid to be measured.The utility model discloses a kind of for insulating oil's breakdown device, solve the problem that due to lack of breakdown experiment equipment for insulating oil in relevant technology, leading to unable to accurately assess the safety and performance of insulating oil in practical application.

Description

Technical Field

[0001] This utility model belongs to the field of experimental equipment, and in particular relates to a breakdown device for insulating oil. Background Technology

[0002] Insulating oil is a special liquid material widely used in electrical equipment such as transformers, instrument transformers, capacitors, and high-voltage switches. Its main function is to prevent short circuits between internal parts of electrical equipment through its excellent insulation properties. In some types of electrical switches, such as oil circuit breakers, insulating oil can also form an arc-extinguishing medium when interrupting high currents, rapidly extinguishing the arc, protecting equipment, and ensuring the safe operation of the power system. Therefore, it is necessary to design a corresponding oil bath breakdown test platform to test the breakdown resistance and other properties of insulating oil, and to collect the gases that may be generated after the insulating oil is broken down by an electric arc, so as to conduct component analysis of the generated gases. Due to the lack of breakdown test equipment for insulating oil in related technologies, it is impossible to accurately assess the safety and performance of insulating oil in practical applications. Summary of the Invention

[0003] In view of this, the present invention aims to at least partially solve one of the related technical problems.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] A breakdown device for insulating oil includes an oil bath and two breakdown mechanisms;

[0006] The two breakdown mechanisms are symmetrically arranged on the left and right sides of the oil bath tank, which is used to hold the oil to be tested.

[0007] The breakdown mechanism includes a tungsten electrode, a sealing structure, and an adjustment mechanism. The inner end of the tungsten electrode is disposed inside the oil bath, and the outer end of the tungsten electrode is connected to the adjustment mechanism.

[0008] The inner ends of the tungsten electrodes of the two breakdown mechanisms are arranged in a mirror-symmetrical manner, and the gap between the inner ends of the tungsten electrodes of the two breakdown mechanisms forms a discharge gap for breaking down the oil to be tested.

[0009] The adjustment mechanism is used to make the tip of the tungsten electrode relatively close to or far away from each other along the axial direction.

[0010] Furthermore, the adjustment mechanism includes a slide mechanism and a drive device. The slide mechanism includes an upper clamping block, a lower clamping block, a slide frame, a lead screw, and a lead screw nut slide. The lead screw is rotatably mounted on the slide frame and is threadedly engaged with the lead screw nut slide. The outer end of the lead screw is connected to the drive device. One end of the upper clamping block is connected to the lead screw nut slide, and the other end of the upper clamping block is connected to the outer end of the tungsten electrode through the lower clamping block. The outer end face of the tungsten electrode is provided with a connecting member.

[0011] Furthermore, the driving device is a rotary handwheel or a stepper motor.

[0012] Furthermore, the sealing structure includes a tungsten rod sleeve, an inner flange cover, a barrel flange, an outer flange, a first sealing gasket, and two second sealing gaskets. One end of the barrel flange is connected to the oil bath barrel, and the other end of the barrel flange is connected to the outer flange through the barrel flange. The tungsten rod sleeve is fitted on the outside of the tungsten electrode rod. The upper clamping block and the lower clamping block clamp and fix the tungsten electrode rod through the tungsten rod sleeve. The tungsten rod sleeve passes through the outer flange. The outer flange seals the gap between the tungsten rod sleeve and the flange through the two second sealing gaskets. A spacer shoulder is provided between the two sealing gaskets. The first sealing gasket is disposed between the outer flange and the barrel flange.

[0013] Furthermore, the sealing structure also includes an inner flange cover, an outer flange cover, and a stop ring. The outer flange cover is located on the outside of the outer flange, and the stop ring and the inner flange cover are both located on the inside of the outer flange. The inner flange cover, the outer flange cover, and the stop ring are all in sliding fit with the tungsten rod sleeve.

[0014] Furthermore, it also includes a guide structure, which includes an insulating guide block and a second support frame. The insulating guide block has a C-shaped structure, the opening of the insulating guide block is the reaction zone, the left and right sides of the insulating guide block are guide portions, the guide portions are slidably engaged with the tungsten electrode rod, the bottom of the insulating guide block is a mounting portion, the mounting portion is connected to the second support frame, and the second support frame is disposed inside the oil bath tank.

[0015] Furthermore, it also includes a heating device, which includes a half-cover plate, an electric heating rod, a temperature sensor, a first support frame and a connecting frame. The half-cover plate is set on the top of the oil bath tank and is connected to the first support frame through the connecting frame. The electric heating rod and the temperature sensor are both set on the first support frame. The half-cover plate is provided with a liquid inlet pipe, and the bottom of the oil bath tank is provided with a liquid outlet pipe.

[0016] Furthermore, it also includes a magnetic stirrer, which is located at the bottom of the oil bath.

[0017] Furthermore, it also includes a gas collection device, which includes a gas collection hood and a micro pump. The micro pump is connected to the gas collection hood via a pipe, and the gas collection hood is located directly above the reaction zone.

[0018] Furthermore, the bottom of the oil bath has a beveled edge on one side, and the drain pipe is located on the other side of the beveled edge.

[0019] Compared with the prior art, the breakdown device for insulating oil described in this utility model has the following advantages:

[0020] 1. The insulating guide block in the guiding structure slides in conjunction with the tungsten electrode rod, effectively guiding the movement trajectory of the tungsten electrode rod and ensuring stable and precise alignment during adjustment, thus making the discharge gap adjustment more accurate. By using insulating material as the guide block, it has excellent electrical insulation properties, protecting the safety of operators during high-voltage discharge and preventing damage to the equipment from current leakage.

[0021] 2. The adjustment mechanism, through a combination of a slide mechanism and a drive unit, enables precise positioning of the tungsten electrode. The threaded engagement between the lead screw and the nut slide provides high-precision linear motion, allowing for fine-tuning of the discharge gap to meet the needs of different experimental conditions. The tungsten electrode can be easily moved by rotating a handwheel or using a stepper motor; the operation is simple and intuitive, reducing the complexity of manual intervention. The adjustment mechanism can move the tungsten electrode closer to or further away along the axial direction, allowing experimenters to quickly change the electrode distance according to experimental needs, thereby testing the breakdown resistance of the insulating oil under different electric field strengths.

[0022] 3. The heating device, through the combination of electric heating rods and temperature sensors, can precisely control the temperature of the oil, ensuring a constant temperature environment for testing. Different experiments may require different temperature conditions; the heating device can flexibly adjust the temperature range to adapt to various experimental needs, expanding the laboratory's research capabilities. With a reasonable temperature control system and protective measures, the heating device can avoid equipment damage or safety hazards caused by overheating, providing reliable protection for experiments. Attached Figure Description

[0023] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0024] Figure 1 This is a schematic diagram of the breakdown device and frame assembly according to an embodiment of the present invention;

[0025] Figure 2This is a schematic diagram of a breakdown device for insulating oil according to an embodiment of the present invention;

[0026] Figure 3 This is a side view of a breakdown device for insulating oil according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the combined structure of the guide structure and the two penetration mechanisms described in an embodiment of the present invention;

[0028] Figure 5 This is a cross-sectional view of a breakdown device for insulating oil according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the sealing structure described in an embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100. Platform frame; 1. Oil bath tank; 11. Inlet pipe; 12. Drain pipe; 13. Support half cover plate; 14. First support frame; 15. Second support frame; 16. Tank flange; 161. Tank flange; 17. Outer flange; 171. First sealing gasket; 172. Inner flange cover; 173. Outer flange cover; 174. Second sealing gasket; 175. Spacer shoulder; 19. Bevel; 2. Magnetic stirrer 3. Mixer; 4. Gas collection hood; 5. Electric heating rod; 6. Temperature sensor; 7. Tungsten electrode rod; 8. Tungsten rod sleeve; 9. Stop ring; 10. Connector; 11. Slide mechanism; 20. Slide frame; 21. Lead screw; 22. Lead screw nut slide; 33. Upper clamping block; 44. Lower clamping block; 55. Rotary handle; 66. Stepper motor; 77. Insulating guide block; 88. Mounting part; 99. Guide part; 90. Reaction zone. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0033] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] A breakdown device for insulating oil, such as Figure 1 As shown, the system includes an oil bath tank 1 and two breakdown mechanisms. The two breakdown mechanisms are symmetrically arranged on the left and right sides of the oil bath tank 1, which is used to hold the oil to be tested. Each breakdown mechanism includes a tungsten electrode 6, a sealing structure, and an adjustment mechanism. The inner end of the tungsten electrode 6 is located inside the oil bath tank 1, and the outer end of the tungsten electrode 6 is connected to the adjustment mechanism. The inner ends of the tungsten electrodes 6 of the two breakdown mechanisms are arranged in a mirror-symmetrical manner, and the gap between the inner ends of the tungsten electrodes 6 of the two breakdown mechanisms forms a discharge gap for breaking down the oil to be tested. A magnetic stirrer 2 is also included, which is located at the bottom of the oil bath tank 1. The oil bath tank 1 and the two breakdown mechanisms are fixedly installed on the platform frame 100.

[0037] The adjustment mechanism is used to move the tip of the tungsten electrode 6 closer to or further away from each other along the axial direction. The adjustment mechanism includes a slide mechanism 7 and a drive device. The slide mechanism 7 includes an upper clamp 73, a lower clamp 74, a slide frame 70, a lead screw 71, and a lead screw nut slide 72. The lead screw 71 is rotatably mounted on the slide frame 70 and threadedly engaged with the lead screw nut slide 72. The outer end of the lead screw 71 is connected to the drive device. One end of the upper clamp 73 is connected to the lead screw nut slide 72, and the other end of the upper clamp 73 is connected to the outer end of the tungsten electrode 6 via the lower clamp 74. A connecting piece 63 is provided on the outer end face of the tungsten electrode 6. One drive device is a rotary handwheel 81, and the other drive device is a stepper motor 82. The adjustment mechanism, through the combination of the slide mechanism 7 and the drive device, can achieve precise positioning of the tungsten electrode 6. The threaded engagement between the lead screw 71 and the lead screw nut slide 72 provides high-precision linear motion, allowing the discharge gap to be finely adjusted to meet the needs of different experimental conditions. The tungsten electrode 6 can be easily moved by rotating a handwheel or using a stepper motor 82. The operation is simple and intuitive, reducing the complexity of manual intervention. The adjustment mechanism can move the tungsten electrode 6 closer to or further away along the axial direction. Experimenters can quickly change the electrode distance according to experimental needs, thereby testing the breakdown resistance of the insulating oil under different electric field strengths.

[0038] The sealing structure includes a tungsten rod sleeve 61, an inner flange cover 172, a barrel flange 16, an outer flange 17, a first sealing gasket 171, and two second sealing gaskets 174. One end of the barrel flange 16 is connected to the oil bath tank 1, and the other end of the barrel flange 16 is connected to the outer flange 17 through the barrel flange 161. The tungsten rod sleeve 61 is fitted on the outside of the tungsten electrode 6. The upper clamping block 73 and the lower clamping block 74 clamp and fix the tungsten electrode 6 through the tungsten rod sleeve 61. The tungsten rod sleeve 61 passes through the outer flange 17. The outer flange 17 seals the gap between the tungsten rod sleeve 61 and the flange through the two second sealing gaskets 174. A spacer shoulder 175 is provided between the two sealing gaskets. The first sealing gasket 171 is located between the outer flange 17 and the barrel flange 161. The sealing structure also includes an inner flange cover 172, an outer flange cover 173, and a stop ring 62. The outer flange cover 173 is located on the outside of the outer flange 17, while the stop ring 62 and the inner flange cover 172 are both located on the inside of the outer flange 17. The inner flange cover 172, the outer flange cover 173, and the stop ring 62 are all in sliding engagement with the tungsten rod sleeve 61. The tungsten rod sleeve 61 is made of a rigid insulating material, such as rigid plastic. The stop ring 62, in conjunction with the inner flange cover 172, prevents the inner flange cover from coming off by abutting against it.

[0039] The system also includes a guiding structure, comprising an insulating guide block 9 and a second support frame 15. The insulating guide block 9 has a C-shaped structure, with its opening positioned at the reaction zone 921. The left and right sides of the insulating guide block 9 are guide portions 92, which slide in conjunction with the tungsten electrode 6. The bottom of the insulating guide block 9 has a mounting portion 91, which connects to the second support frame 15, which is located inside the oil bath tank 1. The sliding engagement between the insulating guide block 9 and the tungsten electrode 6 effectively guides the movement trajectory of the tungsten electrode 6, ensuring stable and precise alignment during adjustment, thus making the discharge gap adjustment more accurate. By using insulating material as the guide block 9, it provides excellent electrical insulation performance, protecting the operator's safety during high-voltage discharge and preventing damage to the equipment from current leakage.

[0040] The system also includes a heating device, comprising a half-cover plate, an electric heating rod 4, a temperature sensor 5, a first support frame 14, and a connecting frame. The half-cover plate is positioned on top of the oil bath 1 and connected to the first support frame 14 via the connecting frame. The electric heating rod 4 and the temperature sensor 5 are both mounted on the first support frame 14. The half-cover plate has an inlet pipe 11, and the bottom of the oil bath 1 has a drain pipe 12. One side of the bottom of the oil bath 1 has a bevel 19, and the drain pipe 12 is located on the other side of the bevel 19. Through the cooperation of the electric heating rod 4 and the temperature sensor 5, the heating device can precisely control the temperature of the oil, ensuring a constant temperature environment for the test. Different experiments may require different temperature conditions; the heating device can flexibly adjust the temperature range to adapt to various experimental needs, expanding the laboratory's research capabilities. With a reasonable temperature control system and protective measures, the heating device can avoid equipment damage or safety hazards caused by overheating, providing reliable protection for the experiment.

[0041] It also includes a gas collection device, which includes a gas collection hood 3 and a micro pump. The micro pump is connected to the gas collection hood 3 through a pipe. The gas collection hood 3 is located directly above the reaction zone 921.

[0042] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A breakdown device for insulating oil, characterized in that: Includes an oil bath (1) and two breakdown mechanisms; Two breakdown mechanisms are symmetrically arranged on the left and right sides of the oil bath (1), which is used to hold the oil to be tested. The breakdown mechanism includes a tungsten electrode (6), a sealing structure and an adjustment mechanism. The inner end of the tungsten electrode (6) is located inside the oil bath (1), and the outer end of the tungsten electrode (6) is connected to the adjustment mechanism. The inner ends of the tungsten electrode rods (6) of the two breakdown mechanisms are arranged opposite each other in a mirror symmetrical manner, and the gap between the inner ends of the tungsten electrode rods (6) of the two breakdown mechanisms forms a discharge gap for breaking down the oil to be tested. The adjustment mechanism is used to make the tip of the tungsten electrode (6) relatively close to or far away from each other along the axial direction.

2. The breakdown device for insulating oil according to claim 1, characterized in that: The adjustment mechanism includes a slide mechanism (7) and a drive device. The slide mechanism (7) includes an upper clamping block (73), a lower clamping block (74), a slide frame (70), a lead screw (71), and a lead screw nut slide (72). The lead screw (71) is rotatably mounted on the slide frame (70). The lead screw (71) is threadedly engaged with the lead screw nut slide (72). The outer end of the lead screw (71) is connected to the drive device. One end of the upper clamping block (73) is connected to the lead screw nut slide (72). The other end of the upper clamping block (73) is connected to the outer end of the tungsten electrode (6) through the lower clamping block (74). The outer end face of the tungsten electrode (6) is provided with a connector (63).

3. A breakdown device for insulating oil according to claim 2, characterized in that: The driving device is a rotary handwheel (81) or a stepper motor (82).

4. A breakdown device for insulating oil according to claim 2, characterized in that: The sealing structure includes a tungsten rod sleeve (61), an inner flange cover (172), a barrel flange (16), an outer flange (17), a first sealing gasket (171), and two second sealing gaskets (174). One end of the barrel flange (16) is connected to the oil bath tank (1), and the other end of the barrel flange (16) is connected to the outer flange (17) through the barrel flange (161). The tungsten rod sleeve (61) is fitted on the outside of the tungsten electrode rod (6). The upper clamping block... (73) and the lower clamping block (74) clamp and fix the tungsten electrode rod (6) through the tungsten rod sleeve (61). The tungsten rod sleeve (61) passes through the outer flange (17). The outer flange (17) seals the gap between the tungsten rod sleeve (61) and the flange through two second sealing gaskets (174). A spacer shoulder (175) is provided between the two sealing gaskets. The first sealing gasket (171) is located between the outer flange (17) and the barrel flange (161).

5. A breakdown device for insulating oil according to claim 4, characterized in that: The sealing structure also includes an inner flange cover (172), an outer flange cover (173), and a stop ring (62). The outer flange cover (173) is located on the outside of the outer flange (17), and the stop ring (62) and the inner flange cover (172) are both located on the inside of the outer flange (17). The inner flange cover (172), the outer flange cover (173), and the stop ring (62) are all in sliding fit with the tungsten rod sleeve (61).

6. A breakdown device for insulating oil according to any one of claims 1-5, characterized in that: It also includes a guide structure, which includes an insulating guide block (9) and a second support frame (15). The insulating guide block (9) has a C-shaped structure. The opening of the insulating guide block (9) is the reaction zone (921). The left and right sides of the insulating guide block (9) are guide parts (92). The guide parts (92) are slidably engaged with the tungsten electrode rod (6). The bottom of the insulating guide block (9) is a mounting part (91). The mounting part (91) is connected to the second support frame (15). The second support frame (15) is located inside the oil bath tank (1).

7. A breakdown device for insulating oil according to claim 6, characterized in that: It also includes a heating device, which includes a half cover plate, an electric heating rod (4), a temperature sensor (5), a first support frame (14) and a connecting frame. The half cover plate is set on the top of the oil bath (1). The half cover plate is connected to the first support frame (14) through the connecting frame. The electric heating rod (4) and the temperature sensor (5) are both set on the first support frame (14). The half cover plate is provided with an inlet pipe (11). The bottom of the oil bath (1) is provided with a drain pipe (12).

8. A breakdown device for insulating oil according to claim 6, characterized in that: It also includes a magnetic stirrer (2), which is located at the bottom of the oil bath (1).

9. A breakdown device for insulating oil according to claim 6, characterized in that: It also includes a gas collection device, which includes a gas collection hood (3) and a micro pump. The micro pump is connected to the gas collection hood (3) through a pipe. The gas collection hood (3) is located directly above the reaction zone (921).

10. A breakdown device for insulating oil according to claim 7, characterized in that: The oil bath tank (1) has a bevel (19) on one side of its bottom, and the drain pipe (12) is located on the other side of the bevel (19).

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