CN211653044U - Electrode gap adjusting device for voltage-withstanding detection of insulating oil - Google Patents
Electrode gap adjusting device for voltage-withstanding detection of insulating oil Download PDFInfo
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- CN211653044U CN211653044U CN201921703360.2U CN201921703360U CN211653044U CN 211653044 U CN211653044 U CN 211653044U CN 201921703360 U CN201921703360 U CN 201921703360U CN 211653044 U CN211653044 U CN 211653044U
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Abstract
The utility model provides an electrode gap adjusting device for insulating oil pressure resistance detection, which comprises an upper panel, a left fine adjustment mechanism, a right fine adjustment mechanism, a front side supporting plate, a rear side supporting plate, a double-plate measuring mechanism and a scale observing mechanism, wherein the upper ends of the two side supporting plates are connected with the front side and the rear side of the upper panel, and the lower ends of the side supporting plates are supported on an oil cup glass frame; a dial is arranged at the center of the upper panel, a scale observation mechanism for observing scales is arranged above the dial, and fine adjustment mechanisms are connected to the left side and the right side of the upper panel; the upper ends of the two fine adjustment mechanisms are fixedly connected with the lower surfaces of the left side and the right side of the upper panel, and the lower ends of the fine adjustment mechanisms are provided with adjusting screws for adjusting the height of the upper panel in the vertical direction; the utility model discloses utilize the geometry principle to carry out the scale-up with two dull and stereotyped displacement vectors, enlarge small interval and displacement, do benefit to operator's use, guarantee the accuracy nature that the electrode discharge clearance adjusted.
Description
Technical Field
The utility model relates to a withstand voltage detection area of insulating oil, in particular to withstand voltage detects and uses electrode clearance adjusting device of insulating oil.
Background
The breakdown voltage test of the insulating oil is to make the insulating oil stop the occurrence of the electron collapse phenomenon by using the self insulating property under the action of an alternating electric field, when the voltage is high enough, the resistance of the insulating oil between two electrodes is suddenly and greatly reduced, the current is increased rapidly, the electrodes are conducted, and then the insulating oil is broken down. The alternating voltage at which this breakdown phenomenon occurs is called "breakdown voltage", and is an important index for characterizing the electrical strength of the insulating oil.
In the insulating oil breakdown voltage tester, the factors that influence the insulating oil breakdown voltage are many, and the factors related to the detection of the oil cup part are as follows: testing the factors of the electrode material, the electrode shape, the electrode area, the distance between the electrodes, the oil cup material, the oil cup shape and the oil cup size. The shape of the electrode particularly affects the performance of the breakdown voltage, so that the flat electrode and the spherical and spherical cap-shaped electrodes are distinguished in the insulation oil breakdown voltage detection standard.
The dielectric breakdown process of the insulating oil is influenced by a plurality of factors, so that the insulating oil often shows obvious randomness, and the test data has large dispersity and is a statistical value. Because of the inherent factors, the detection conditions created by the test operator in the preparation stage of the test are important to ensure the correctness of the detection result of the withstand voltage of the insulating oil. Under the condition of a certain test voltage, the first factor for ensuring breakdown is the electrode spacing, in the test of the insulating oil voltage resistance detection, the spacing of the oil cup test electrodes has a clear requirement, and for the spherical cap-shaped electrodes, the electrode spacing is required to be 2.5mm +/-0.05 mm. The clearance between the measurement planes of the commonly used clearance gauge is better used, because the surface of the spherical cap-shaped electrode used in the insulating oil voltage resistance test is a curved surface, because the spherical surface is manufactured, the oil cup electrode is assembled and matched, and the shape of the electrode is changed due to the irregular polishing in the using process, and the influence caused by the factors has great probability of changing the curvature and the shape of the surface of the electrode. When the conventional gap gauge is used for detecting the electrode distance, the insertion angle of the gap gauge cannot be accurately grasped, the measurement data of the electrode gap of the spherical cover is often not grasped accurately, the error is different from person to person, or the gap is measured again after being locked, and the gap is found to be changed. The electrode spacing for the voltage withstanding detection requires high precision, and the result of the insulating oil voltage withstanding detection performed in this case may be inaccurate, resulting in an increase in uncertainty.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a withstand voltage detection of insulating oil is with electrode clearance adjusting device utilizes the geometry principle to carry out the proportion with two dull and stereotyped displacement vectors and enlargies small interval and displacement, does benefit to operator's use, guarantees the accuracy nature that electrode discharge clearance adjusted.
The technical scheme of the utility model:
an electrode gap adjusting device for insulating oil voltage resistance detection comprises an upper panel, a left fine adjustment mechanism, a right fine adjustment mechanism, a front side support plate, a rear side support plate, a double-plate measuring mechanism and a scale observing mechanism,
the upper ends of the two side supporting plates are connected with the front side and the rear side of the upper panel, and the lower ends of the side supporting plates are supported on the oil cup glass frame and used for supporting the upper panel and are positioned above the cup opening of the oil cup;
a dial is arranged at the center of the upper panel, a scale observation mechanism for observing scales is arranged above the dial, and fine adjustment mechanisms are connected to the left side and the right side of the upper panel;
the upper ends of the two fine adjustment mechanisms are fixedly connected with the lower surfaces of the left side and the right side of the upper panel and used for supporting the left side and the right side of the upper panel, and the lower ends of the fine adjustment mechanisms are provided with adjusting screws used for adjusting the height of the upper panel in the vertical direction;
the fine adjustment mechanism is also provided with a beam frame for supporting the double-plate measuring mechanism, and the double-plate measuring mechanism is arranged on the beam frame through a shaft and is positioned in the middle of the beam frame;
the double-plate measuring mechanism comprises a left side plate and a right side plate which are connected through a shaft, and a pointer which is used for extending to the lower part of the dial is further arranged on the right side plate.
The upper end of the side supporting plate is fixedly connected with the front side and the rear side of the upper panel through pins, so that the upper panel is ensured to be horizontal.
The same end of left side board and right side board is provided with the shaft hole, and the axle passes the shaft hole and realizes the connection of left side board and right side board, is provided with spring assembly between left side board and right side board and makes the interval keep 2.5 millimeters between left side board and the right side board.
The fine adjustment mechanism is provided with a screw hole matched with the adjusting screw, and the outer side of the screw hole is provided with a fine adjustment scale window for displaying the screwing-in depth of the screw.
The scale observation mechanism comprises a support seat fixedly arranged on the upper panel, a lens base is arranged on the support seat, and an objective lens and an eyepiece are arranged on the lens base and used for magnifying scales on the dial scale.
The front side and the rear side of the upper panel are provided with installation notches, the upper end of the side support plate is provided with a fixing lug matched with the installation notches, and the fixing lug is clamped into the installation notch and is fixed by a pin to realize the fixed connection of the upper panel and the side support plate.
The pointer extends out from the shaft hole end of the right side plate, and the pointer and the right side plate are of an integrated structure.
The side supporting plate is made of a transparent acrylic plate.
Compared with the prior art, the beneficial effects of the utility model are that: the electrode gap of the two electrodes is represented as the relative distance between the surfaces of the plates which are in close contact with each other by utilizing the two plates which are in parallel structure, the distance between the two surfaces when the two surfaces are positioned at the parallel position is set to be 2.5mm in design, the structure fully represents the design intention of improving the measurement precision, the displacement vectors of the two plates are amplified in proportion by utilizing the geometric principle, and the tiny distance and displacement are amplified, so that the use of an operator is facilitated.
Drawings
Fig. 1 is a schematic view of the overall structure of the device of the present invention.
Fig. 2 is a schematic view of the three-dimensional structure of the device of the present invention.
Fig. 3 is a schematic view of the connection structure of the upper panel and the side supporting plate of the present invention.
Fig. 4 is a schematic side view of the double-plate measuring mechanism of the present invention.
Fig. 5 is a schematic view of the front exploded structure of the double-plate measuring mechanism of the present invention.
Fig. 6 is a schematic structural view of the scale observation mechanism of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution:
an electrode gap adjusting device for insulating oil voltage resistance detection comprises an upper panel 1, a left fine adjustment mechanism 2, a right fine adjustment mechanism 2, a front side support plate 3, a rear side support plate 3, a double-plate measuring mechanism 8 and a scale observation mechanism 12,
the upper ends of the two side supporting plates 3 are connected with the front side and the rear side of the upper panel 1, and the lower ends of the side supporting plates 3 are supported on the glass frame of the oil cup and used for supporting the upper panel 1 and are positioned above the cup opening of the oil cup;
a dial 10 is arranged at the center of the upper panel 1, a scale observation mechanism 12 for observing scales is arranged above the dial 10, and the fine adjustment mechanisms 2 are connected to the left side and the right side of the upper panel 1;
the upper ends of the two fine adjustment mechanisms 2 are fixedly connected with the lower surfaces of the left side and the right side of the upper panel 1 and used for supporting the left side and the right side of the upper panel 1, and the lower ends of the fine adjustment mechanisms 2 are provided with adjusting screws 4 used for adjusting the height of the upper panel 1 in the vertical direction;
the fine adjustment mechanism 2 is also provided with a beam frame 7 for supporting a double-plate measuring mechanism 8, and the double-plate measuring mechanism 8 is arranged on the beam frame 7 through a shaft 9 and is positioned in the middle of the beam frame 7;
the double-plate measuring mechanism 8 comprises a left side plate 81 and a right side plate 80 which are connected through a shaft 9, and a pointer 83 which extends to the lower part of the dial is arranged on the right side plate 80.
The fine adjustment mechanism 2 is provided with a screw hole 5 matched with the adjusting screw, and the outer side of the screw hole 5 is provided with a fine adjustment scale window 6 for displaying the screwing depth of the screw 4.
Referring to fig. 3, the upper end of the side supporting plate 3 is fixedly connected to the front and rear sides of the upper panel 1 by pins to ensure the level of the upper panel 1, the front and rear sides of the upper panel 1 are provided with mounting notches, the upper end of the side supporting plate 3 is provided with fixing bumps matched with the mounting notches, and the fixing bumps are clamped into the mounting notches and fixed by pins to realize the fixed connection between the upper panel 1 and the side supporting plate 3.
Referring to fig. 4 and 5, a shaft hole 82 is formed at the same end of the left side plate 81 and the right side plate 80, the shaft 9 passes through the shaft hole 82 to connect the left side plate 81 and the right side plate 80, and a spring 84 device is arranged between the left side plate 81 and the right side plate 80 to keep the distance between the left side plate 81 and the right side plate 80 at 2.5 mm.
Referring to fig. 6, the scale observation mechanism 12 includes a supporting base 11 fixedly disposed on the top panel 1, a lens base 120 is mounted on the supporting base 11, and an objective lens 122 and an eyepiece 121 are mounted on the lens base 120 for magnifying the scale on the scale 10.
The pointer 83 extends out from the shaft hole 82 end of the right side plate 80, and the pointer 83 and the right side plate 80 are of an integrated structure.
The side supporting plate 3 is made of a transparent acrylic plate.
The electrode gap adjusting method by using the electrode gap adjusting device for the dielectric oil voltage resistance detection comprises the following specific steps of:
placing the oil cup on a table, pulling the electrodes in the oil cup to the maximum distance, checking the surface condition of the electrodes of the ball cover, checking the stability of the threads of the electrodes and the connecting column, and loosening the electrode fixing mechanism if the electrodes and the connecting column are perfect and smooth so that the electrodes can be freely adjusted;
the electrode gap adjusting device is horizontally placed on the table top, the structure of the whole frame is checked to be normal, the opening at the lower end of the double-plate measuring mechanism is in an outward expansion shape, the joint of an electrode and a pointer is not deformed, a dial scale is clean and does not interfere with observation, a magnifier is transparent and does not interfere with observation, the fine adjusting mechanism is adjusted to be uniform in scale, and the base of the adjusting screw is flat;
checking the double-plate measuring mechanism by using a standard 2.5mm feeler gauge, keeping the positions of the feeler gauge and the double-plate mechanism stable and unchanged, and observing whether the pointer indication position is correct or not through a magnifier;
adjusting the distance between the two electrodes to 5-8 mm, putting a side edge supporting mechanism of the electrode gap adjusting device at the edge of an opening of an oil cup, enabling a double-plate measuring mechanism to be arranged in the electrode gap, if the side edge support of the double fine adjustment structure is too high to contact the oil cup, properly lowering a screw of the fine adjustment mechanism so that the side edge support can build a support on the oil cup, if the bottom of the screw of the double fine adjustment structure is too high to contact the electrode connecting column, heightening the screw until the bottom of the screw contacts the electrode connecting column, and finally enabling the indication scales of the fine adjustment mechanisms at the two ends to be the same;
adjusting the electrode gap, observing the magnifier, and finding that the pointer moves to the indication scale of the standard gap, wherein the adjustment speed cannot be too high to impact the double-plate measuring mechanism, so that the double plates are deformed and damaged, and the adjustment of the electrode is stopped until the pointer is completely aligned with the scale of the standard gap, at this time, the electrode gap is fixed, and the work is finished;
and cleaning oil stains of the electrode gap adjusting device, and placing the electrode gap adjusting device in a dry place for storage after the electrode gap adjusting device is checked to be correct.
In the measurement of the electrode spacing of the withstand voltage tester, if a traditional universal gap gauge is used, obvious measurement errors can be shown under certain conditions, the method can fundamentally change the current situation, is favorable for correctly setting the electrode spacing of the withstand voltage detection, and improves an objective condition of the withstand voltage detection of the insulating oil.
The utility model discloses the interval of considering withstand voltage detection electrode in the design principle requires "2.5 mm 0.05 mm", and this interval is too little to the general movable mechanism of difficult design is measured. Therefore, by utilizing two flat plates in parallel structure, the electrode gap of the two electrodes is represented as the relative distance of the surfaces of the flat plates which are respectively in close contact, and the distance between the two surfaces in parallel position is set to be 2.5mm in design, so that the structure fully represents the design intention of improving the measurement precision. The design difficulty is that how to visually represent the 2.5mm data in front of a tester, the data is convenient and easy to use, and the design is not expected to cause high use cost. Therefore, the displacement vectors of the two flat plates are amplified in proportion by using the geometric principle, and the tiny distance and displacement are amplified, so that the use of an operator is facilitated.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. An electrode gap adjusting device for insulating oil voltage resistance detection is characterized by comprising an upper panel, a left fine adjustment mechanism, a right fine adjustment mechanism, a front side supporting plate, a rear side supporting plate, a double-plate measuring mechanism and a scale observing mechanism,
the upper ends of the two side supporting plates are connected with the front side and the rear side of the upper panel, and the lower ends of the side supporting plates are supported on the oil cup glass frame and used for supporting the upper panel and are positioned above the cup opening of the oil cup;
a dial is arranged at the center of the upper panel, a scale observation mechanism for observing scales is arranged above the dial, and fine adjustment mechanisms are connected to the left side and the right side of the upper panel;
the upper ends of the two fine adjustment mechanisms are fixedly connected with the lower surfaces of the left side and the right side of the upper panel and used for supporting the left side and the right side of the upper panel, and the lower ends of the fine adjustment mechanisms are provided with adjusting screws used for adjusting the height of the upper panel in the vertical direction;
the fine adjustment mechanism is also provided with a beam frame for supporting the double-plate measuring mechanism, and the double-plate measuring mechanism is arranged on the beam frame through a shaft and is positioned in the middle of the beam frame;
the double-plate measuring mechanism comprises a left side plate and a right side plate which are connected through a shaft, and a pointer which is used for extending to the lower part of the dial is further arranged on the right side plate.
2. The electrode gap adjusting apparatus for dielectric oil withstand voltage test as set forth in claim 1, wherein the upper ends of the side support plates are fixedly connected to the front and rear sides of the upper panel by pins to ensure the upper panel is horizontal.
3. The electrode gap adjusting device for dielectric oil withstand voltage testing of claim 1, wherein the left side plate and the right side plate are provided with shaft holes at the same end, the shaft passes through the shaft holes to connect the left side plate and the right side plate, and a spring device is provided between the left side plate and the right side plate to keep the distance between the left side plate and the right side plate at 2.5 mm.
4. The electrode gap adjusting device for voltage withstand test of insulating oil of claim 1, wherein the fine adjustment mechanism is provided with a screw hole matching with the adjustment screw, and a fine adjustment scale window for displaying the screwing depth of the adjustment screw is provided outside the screw hole.
5. The electrode gap adjusting apparatus for dielectric oil withstand voltage testing of claim 1, wherein the scale observation mechanism comprises a support base fixedly disposed on the upper panel, a lens base is mounted on the support base, and an objective lens and an eyepiece are mounted on the lens base for magnifying the scale on the dial.
6. The electrode gap adjusting device for the voltage-withstand test of the insulating oil according to claim 2, wherein the front and rear side edges of the upper panel are provided with mounting notches, the upper end of the side support plate is provided with fixing bumps matched with the mounting notches, and the fixing bumps are clamped into the mounting notches and fixed by pins to realize the fixed connection of the upper panel and the side support plate.
7. The apparatus of claim 3, wherein the pointer extends from an end of the shaft hole of the right side plate, and the pointer and the right side plate are integrally formed.
8. The electrode gap adjusting device for dielectric oil withstand voltage test according to any one of claims 1 to 7, wherein the side support plates are made of a transparent acrylic plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921703360.2U CN211653044U (en) | 2019-10-11 | 2019-10-11 | Electrode gap adjusting device for voltage-withstanding detection of insulating oil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921703360.2U CN211653044U (en) | 2019-10-11 | 2019-10-11 | Electrode gap adjusting device for voltage-withstanding detection of insulating oil |
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| CN211653044U true CN211653044U (en) | 2020-10-09 |
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| CN201921703360.2U Active CN211653044U (en) | 2019-10-11 | 2019-10-11 | Electrode gap adjusting device for voltage-withstanding detection of insulating oil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110596555A (en) * | 2019-10-11 | 2019-12-20 | 国网湖北省电力有限公司电力科学研究院 | Electrode gap adjusting device and method for dielectric oil voltage resistance detection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110596555A (en) * | 2019-10-11 | 2019-12-20 | 国网湖北省电力有限公司电力科学研究院 | Electrode gap adjusting device and method for dielectric oil voltage resistance detection |
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