CN102661771B - A measuring device and measuring method for quantifying the oil level of a high-voltage current transformer - Google Patents

Abstract

The invention discloses a measuring device for quantifying the oil level of a high-voltage current transformer. The present invention also provides a measurement method. First, adjust the tripod to ensure that the vernier angle meter is placed horizontally; secondly, after adjusting and determining the measurement position, use the laser sight to precisely align the upper and lower limits of the observation window of the high-voltage current transformer and the oil level. At the same time, use a vernier angle meter to measure the corresponding angle, where the angles corresponding to the upper limit point A, the lower limit point C of the oil level observation window and the point B of the oil level scale line are γ, α, and β respectively; finally, by calculating formula

Get the proportional value of the oil level scale relative to the entire observation window. The invention fills up the gap in the method for measuring the oil level of the quantified high-voltage current transformer, and the measuring device provided by the invention has the characteristics of convenient assembly and portability, simple operation and high precision.

Description

A measuring device and measuring method for quantifying the oil level of a high-voltage current transformer

technical field

The invention relates to a measuring device for measuring the oil level of a high-voltage current transformer and a corresponding measuring method.

Background technique

Due to the advantages of compact structure and strong dynamic and thermal stability, inverted oil-filled current transformers are widely used in power grids with voltage levels of 35kV and above. As an important basis for judging whether the transformer equipment is normal, observing the oil level of the transformer and analyzing the change of the oil level has become an important content for electric workers to regularly inspect the transformer equipment. However, since the oil level observation windows of the inverted current transformers are all located on the top of the transformer, higher than the ground, and there are only a few simple scale lines such as 40°C and -20°C outside the observation windows, it is impossible for inspection personnel to remove the oil level. The position is quantified as a specific value, so whether the oil level change is reasonable or normal can only be a vague conclusion. This is very unfavorable for a comprehensive grasp of the operating conditions of the transformer equipment. Especially when the current transformer is in the case of oil leakage defects, it is difficult for inspection personnel to analyze and judge the development trend of oil leakage defects through the results of previous inspections. Therefore, a measurement method that can quantify the oil level of inverted current transformers is urgently needed , and put forward the corresponding measuring device.

Contents of the invention

The technical problem to be solved by the present invention is to provide a measuring device capable of measuring the oil level of a high-voltage current transformer and a corresponding measuring method. Through the use of the present invention, inspection personnel can measure and calculate the oil level of an inverted current transformer as a The determined percentage solves the problem that the oil level of the transformer cannot be quantified. By analyzing the oil level values recorded in previous times, and considering factors such as ambient temperature and load conditions, inspection personnel can more accurately judge whether the transformer equipment is operating normally.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions: a measuring device for quantifying the oil level of a high-voltage current transformer, which is characterized in that it includes a pair of tripods, and a vernier angle meter is installed on the horizontal surface of the top of the tripods. A laser sight is installed on the vernier angle meter.

Preferably, the tripod includes three legs, two of which are adjustable in height, and the top of the tripod is provided with a horizontal support surface, and the horizontal plane is arranged above the support surface in parallel, wherein there are three supports between the support surface and the horizontal plane. The horizontal adjustment screws distributed in an equilateral triangle can ensure the level of the horizontal plane by adjusting these three horizontal adjustment screws.

Preferably, two mutually orthogonal horizontal bubbles are arranged on the horizontal plane, and whether the horizontal plane is horizontal can be judged by observing the position of the bubbles in the horizontal bubbles.

As preferably, the vernier angle meter includes a T-shaped support, a clip, a fan-shaped carriage, a main ruler, a vernier ruler, a base ruler and a fan-shaped tooth, the bottom of the T-shaped support is fixed to the horizontal plane of the tripod, and the fan-shaped carriage is connected to the clamp by a screw Connected; the clip is installed on one side arm of the T-shaped support, and the fan-shaped teeth are installed on the back of the main ruler; the vernier ruler is set on the outer end of the main ruler, and the fan-shaped tooth adjustment screw is set on the fan-shaped drag plate, and the fan-shaped teeth and the fan-shaped tooth adjustment screw are used for adjustment. To measure the angle, the front end of the main ruler is equipped with a base ruler and a laser sight.

As a preference, a square fixture is provided at the center of the horizontal plane of the tripod, the square fixture adopts a square metal hollow tube, and the inner diameter of the tube hole of the square fixture matches the bottom of the T-shaped support of the vernier angle meter so that the T-shaped The bottom of the support member is inserted into the pipe hole for fixing.

As a preference, two fixing screw holes are provided at the bottom of the laser sight to cooperate with the fixing screws on the vernier angle meter to fix the laser sight on the front end of the main ruler of the vernier angle meter, and the laser sight is provided with an adjustment laser emission port The laser beam adjustment screw for the direction of the emitted laser beam, by adjusting the laser beam adjustment screw, ensure that the laser beam and the base ruler of the vernier angle meter are on the same horizontal line.

得出油位刻度相对整个观察窗的比例数值。The present invention also provides a method for quantifying the oil level of a high-voltage current transformer, which is characterized in that: firstly, adjust the tripod to ensure that the vernier angle meter is placed horizontally; secondly, after adjusting and determining the measurement position, use a laser sight to accurately align The upper and lower limits of the high-voltage current transformer observation window and the scale line of the oil level, and the corresponding angle is measured by a vernier angle meter, among which the angle corresponding to the upper limit point A, the lower limit point C of the oil level observation window and the point B of the oil level scale line are γ, α, β respectively; finally, through the calculation formula

Get the proportional value of the oil level scale relative to the entire observation window.

The invention fills up the gap in the method for measuring the oil level of the quantified high-voltage current transformer, and the measuring device provided by the invention has the characteristics of convenient assembly and portability, simple operation and high precision.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

Figure 1 is a schematic diagram of the measurement method;

Fig. 2 is the schematic diagram of measuring instrument structure;

Figure 3 is a front view of the tripod;

Figure 4 is a side view of the tripod;

Figure 5 is a top view of the tripod;

Fig. 6 is the front view of the vernier angle meter;

Fig. 7 is a rear view of the vernier angle meter;

Figure 8 is a front view of the laser sight;

Figure 9 is a left view of the laser sight;

Figure 10 is a right view of the laser sight;

Figure 11 is a top view of the laser sight.

Detailed ways

As shown in Fig. 2, the measuring device for quantifying the oil level of high-voltage current transformers provided by the present invention is mainly composed of a special tripod 1 for surveying and mapping, a vernier angle meter 8, and a laser sight 9, which is convenient for assembly.

As shown in Figure 2 to Figure 5, the tripod part is mainly composed of a special tripod for surveying and mapping 1, a support surface 2, a level adjustment screw 3, a level surface 6, a level bubble (respectively, a horizontal level bubble 4 and a vertical level bubble 7), a square fixed Composed of 5 parts, two legs of the special tripod for surveying and mapping can be adjusted, which can be applied to most measurement environments (different soil quality and slope); three level adjustment screws 3 are set on the support surface 2, and the three level adjustment screws can be adjusted to ensure The horizontal plane 6 is horizontal; two mutually orthogonal horizontal bubbles are set on the horizontal plane 6. By observing the positions of the bubbles in the two horizontal bubbles, it is judged whether the horizontal plane 6 of the measuring instrument is horizontal; The function of the goniometer; the square fixing part 5 adopts a square metal hollow tube, and the inner diameter of the tube hole matches the T-shaped support part 10 of the vernier goniometer, so that the T-shaped support part 10 can be inserted into the tube hole for fixed use.

The vernier angle meter 8 is shown in Figures 6 and 7, and mainly consists of a T-shaped support member 10, a clip 11, a main ruler 13, a vernier ruler 12, a brake block 17, a base ruler 15, a fan-shaped carriage 20, and a fan-shaped tooth adjustment screw 24 Composed of other parts, the fan-shaped carriage 20, the main ruler 13, the vernier ruler 12, and the base ruler 15 are used as the main body of the vernier angle meter, and the fan-shaped carriage 20 is connected with the clip 11 through the connecting screw 18; the clip 11 is inserted with a T-shaped support 10. Fix the position of the T-shaped support 10 and the main body of the vernier angle meter through the clip adjustment screw 19; set the brake block 17 on the fan-shaped carriage 20, and adjust the brake screw 14 to ensure that the vernier angle meter will not change after the measurement result is obtained The minimum scale of the main scale is 1 degree, and the minimum scale of the vernier scale 12 is 2 points; the fan-shaped teeth 22 are installed on the back of the main scale 13, and are fixed on the main scale by three screws 23; To adjust the measurement angle; the end of the main ruler 13 is provided with a laser sight 9, and the laser sight 9 is fixed by two fixing screws 16; the laser beam emitted by the laser sight 9 is on the same horizontal line as the base ruler 15.

As shown in Figures 7 to 11, the laser sight 9 has two fixing screw holes 26 at the bottom, which are used in conjunction with the fixing screws 16 on the vernier angle meter to fix the laser sight 9 on the vernier angle meter 8; the laser beam adjustment The screw 28 can adjust the direction of the laser beam emitted by the laser emission port 27 to ensure that the laser beam and the vernier goniometer base ruler 15 are on the same horizontal line.

In conjunction with Figure 1, the measurement method using the above-mentioned measuring device for quantifying the oil level of the high-voltage current transformer is described: the level of the measuring instrument can be ensured by using the tripod and the horizontal adjustment screw arranged on it; Observe the upper and lower limits of the window and the scale line of the oil level, and measure the corresponding angle with a vernier angle meter, and finally obtain the ratio of the oil level scale to the entire observation window through the calculation formula.

After the measurement position O is selected, the angles γ, α, and β corresponding to the upper limit A point, the lower limit C point and the oil level scale line B point of the oil level observation window can be accurately measured by using the measuring instrument provided by the present invention, thereby obtaining the current The value of transformer oil level relative to the observation window,

Claims (4)

1. A measuring device for quantifying the oil level of a high-voltage current transformer, characterized in that: it includes a tripod (1), and a vernier angle meter (8) is installed on the horizontal plane (6) at the top of the tripod, and the vernier angle A laser sight (9) is installed on the instrument. The tripod (1) includes three legs, two of which are adjustable in height. The top of the tripod is provided with a horizontal support surface (2), and the horizontal surface (6 ) are arranged in parallel above the support surface, wherein three horizontal adjustment screws (3) distributed in an equilateral triangle are arranged between the support surface and the horizontal surface, and the horizontal surface (6) is ensured by adjusting these three horizontal adjustment screws. The horizontal surface ( 6) Set up two mutually orthogonal horizontal bubbles, and judge whether the horizontal surface (6) is horizontal by observing the position of the bubbles in the horizontal bubbles. The vernier angle meter (8) includes a T-shaped support (10), a clip (11 ), fan-shaped carriage (20), main ruler (13), vernier ruler (12), base ruler (15) and fan-shaped teeth (22), the bottom of the T-shaped support is fixed to the horizontal plane of the tripod, and the fan-shaped carriage (20) passes The connecting screw (18) is connected with the clip (11); the clip (11) is installed on the side arm of the T-shaped support, and the fan-shaped teeth (22) are installed on the back of the main ruler (13); the vernier ruler (12) is set on the outer end of the main ruler , the sector tooth adjustment screw (24) is set on the sector carriage, the sector tooth (22) cooperates with the sector tooth adjustment screw to adjust the measurement angle, the front end of the main ruler (13) is provided with a base ruler (15) and a laser sight (9 ). 2. The measuring device for quantifying the oil level of high-voltage current transformers according to claim 1, characterized in that: a square-shaped fixing piece (5) is arranged in the center of the horizontal plane (6) of the tripod (1), and the square-shaped fixing piece The piece (5) adopts a square metal hollow tube, and the inner diameter of the tube hole of the square fixing piece matches the bottom of the T-shaped support piece (10) of the vernier angle meter so that the bottom of the T-shaped support piece (10) is inserted into the tube hole to realize fixing. 3. The measuring device for quantifying the oil level of high-voltage current transformers according to claim 2, characterized in that two fixing screw holes (26) and the fixing screws on the vernier angle meter are set at the bottom of the laser sight (9) (16) Use together to fix the laser sight (9) on the front end of the main scale of the vernier angle meter. The laser sight is provided with a laser beam adjustment screw (28) to adjust the direction of the laser beam emitted from the laser emission port (27). , by adjusting the laser beam adjustment screw to ensure that the laser beam is on the same level as the base ruler (15) of the vernier angle meter. 4. A method for quantifying the oil level of a high-voltage current transformer, characterized in that: firstly, adjust the tripod (1) to ensure that the vernier angle meter is placed horizontally; secondly, after adjusting and determining the measurement position, use the laser sight (9) Accurately align the upper and lower limits of the high-voltage current transformer observation window and the scale lines of the oil level, and measure the corresponding angle with the vernier angle meter (8), where the upper limit A of the oil level observation window, the lower limit C point and the oil level scale The angles corresponding to point B on the line are γ, α, and β respectively; finally, through the calculation formula

Get the proportional value of the oil level scale relative to the entire observation window.

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