CN209296769U - A kind of bracket improving power frequency electric field measuring instrument accuracy - Google Patents

Abstract

The utility model discloses a bracket for improving the accuracy of a power frequency electric field measuring instrument, which comprises a fixture, a central rod, and a wooden bracket; the wooden bracket includes a first bracket and a second bracket, the inside of the first bracket is a hollow structure, and the second bracket is installed Inside the first bracket, a fastening knob is installed at the end of the first bracket, the first bracket is connected to the fixed block by a hinge, a level adjuster is arranged on the disc, and a central rod is fixed on the disc by bolts, and the clamp is in the horizontal direction A horizontal rod is provided, and the end of the horizontal rod is provided with a fixing device, and a detection probe is fixed on the fixing device; a support for improving the accuracy of a power frequency electric field measuring instrument, which changes the supporting method of the monitoring probe of a traditional power frequency electric field strength measuring instrument. The traditional triangular bracket supporting the monitoring probe vertically on the ground is changed to a horizontal support mode with the ground, which can avoid the error caused by the ambient humidity on the measurement of the monitoring probe and effectively improve the accuracy of the measurement results.

Description

A support for improving the accuracy of power frequency electric field measuring instrument

technical field

The utility model relates to the technical field of power frequency electric field strength monitoring of AC power transmission and transformation projects, in particular to a support for improving the accuracy of power frequency electric field measuring instruments of AC power transmission and transformation projects.

Background technique

At present, in the measurement of power frequency electric field intensity of transmission lines and substations in AC power transmission and transformation projects, the power frequency electric field measuring instruments used are mainly 8053A and 8053B of Italian PMM company, EFA300 of German Narda company and Beijing Senfu Technology SEM-600 Wait. However, when these measuring instruments detect the power frequency electric field strength of transmission lines and substations, the measurement data tends to fluctuate with changes in air relative humidity, especially when the relative air humidity is greater than 60%, the accuracy is greatly affected by the relative air humidity. How to avoid There has been no effective solution to the influence of ambient humidity on the accuracy of these power frequency electric field strength measuring instruments.

Utility model content

The purpose of the utility model is to provide a support for improving the accuracy of the power frequency electric field measuring instrument, which solves the problem that the measurement data of the currently used power frequency electric field strength measuring instrument is easily affected by the relative humidity of the air.

In order to achieve the above object, the utility model provides the following technical solutions: a bracket for improving the accuracy of a power frequency electric field measuring instrument, including a clamp, a central rod, and a wooden bracket; the wooden bracket includes a first bracket and a second bracket, and the The inside of the first bracket is a hollow structure, the second bracket is sleeved inside the first bracket, a fastening knob is installed at the end of the first bracket, and the top end of the first bracket is connected to the fixed block through a movable shaft. A disc is arranged above the fixed block, and a fixed block is uniformly welded under the disc, a level regulator is arranged on the disc, a center rod is fixed in the middle of the disc by bolts, and a A fixture, the fixture fixes the horizontal bar and the central bar through bolts, the end of the horizontal bar has a fixing device through bolts, and a detection probe is fixed on the fixing device.

Preferably, a limit block is welded on the fixed block.

Preferably, a movable shaft is provided at the end of the second bracket, and a rubber base is connected to the movable shaft.

Preferably, a card slot is provided in the middle of the fixing device, and a knob is provided on the left side of the card slot, and the knob is connected to the screw rod on the right side by welding, and a rubber cap is provided at the other end of the screw rod, and the right side of the card slot A fixed seat is arranged on the side, and a spring is arranged inside the fixed seat. One end of the spring is fixed to the fixed seat, and the other end of the spring is installed above the fixed piece. An upper crescent block is arranged below, and the upper crescent block is fixed with a lower crescent block by bolts. A spring a is arranged inside the upper crescent block, and a steel ball is arranged above the spring a, and the steel ball is in close contact with the rotating shaft .

Preferably, the upper crescent block and the lower crescent block are fixed on the outer side of the horizontal rod by bolts.

Preferably, there are three wooden supports.

Preferably, the level adjuster is in the shape of a round cake, and a dial is provided on the surface of the level adjuster.

Compared with the prior art, the beneficial effects of the utility model are as follows: a support for improving the accuracy of the power frequency electric field measuring instrument changes the support mode of the monitoring probe of the traditional power frequency electric field strength measuring instrument, and the traditional triangular support is vertical to the ground The method of supporting the monitoring probe is changed to be horizontal to the ground, which can avoid the error caused by the ambient humidity on the measurement of the monitoring probe, and effectively improve the accuracy of the measurement results.

It is suitable for measuring the power frequency electric field intensity of the lines of AC power transmission and transformation projects and the surrounding environment of substations.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of a support for improving the accuracy of a power frequency electric field measuring instrument of the present invention;

Fig. 2 is two kinds of support measurement result figures in the standard electric field of the support of a kind of improvement power frequency electric field measuring instrument accuracy of the utility model;

Fig. 3 is a schematic diagram of the position of the rubber base of the support for improving the accuracy of the power frequency electric field measuring instrument of the utility model;

Fig. 4 is a schematic diagram of the overall structure of a bracket fixing device for improving the accuracy of a power frequency electric field measuring instrument according to the present invention.

Notes in the figure: 1 fixture, 2 center rod, 3 disc, 4 wooden bracket, 41 first bracket, 42 second bracket, 43 rubber base, 44 fastening knob, 5 level adjuster, 6 level rod, 61 card Groove, 62 screw rods, 63 knobs. 64 rubber caps, 65 fixed pieces, 66 springs, 67 fixed seats, 68 upper crescent blocks, 69 lower crescent blocks, 601 rotating shafts, 602 spring a, 603 steel balls, 7 detection probes, 8 fixed blocks, 81 limit blocks.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. For example, based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

In describing the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", The orientation or positional relationship indicated by "outside" is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation , are constructed and operated in a specific orientation and therefore cannot be construed as limiting the invention.

Please refer to Figure 1-4, a support for improving the accuracy of a power frequency electric field measuring instrument, including a fixture 1, a central rod 2, and a wooden support 4; there are three wooden supports 4 to make the support more stable as a whole. The wooden support 4 includes the first A bracket 41 and a second bracket 42, the inside of the first bracket 41 is a hollow structure, the second bracket 42 is sleeved inside the first bracket 41, the end of the first bracket 41 is equipped with a fastening knob 44, the fastening knob 44 can hold the second The length of the second support 42 is adjusted, the wooden support 4 is a telescopic structure, the end of the second support 42 is provided with a movable shaft, and the movable shaft is connected with a rubber base 43 to increase the friction with the ground, and the first support 41 is connected by a hinge On the fixed block 8, the limit block 81 is welded on the fixed block 8, and the wooden support 4 carries out the limit. The top of the fixed block 8 is welded with a disk 3, and the middle position of the disk 3 is provided with a level adjuster 5, and the level adjuster 5 is Round cake shape, and the surface of the level regulator 5 is provided with a dial, which is convenient to observe the position of the air bubble in the middle of the level regulator 5. The disc 3 is fixed with a center rod 2 by bolts, and a clamp 1 is installed above the center rod 2, and the clamp 1 The horizontal bar 6 and the central bar 2 are fixed by bolts, the end of the horizontal bar 6 is fixed with a fixing device by bolts, the middle position of the fixing device is provided with a card slot 61, the left side of the card slot 61 is provided with a knob 63, and the knob 63 is connected to the right side by welding. The screw rod 62 on the side is connected, the other end of the screw rod 62 is provided with a rubber cap 64, the right side of the card slot 61 is provided with a fixed seat 67, the inside of the fixed seat 67 is provided with a spring 66, one end of the spring 66 is fixed to the fixed seat 67, and the spring 66 is on the other hand One end is installed on the top of the fixed piece 65, a rotating shaft 601 is arranged below the card slot 61, an upper crescent block 68 is arranged below the rotating shaft 601, and the upper crescent block 68 is fixed with a lower crescent block 69 by bolts, and the upper crescent block 68 is internally arranged There is a spring a602, a steel ball 603 is arranged above the spring a602, the steel ball 603 is in close contact with the rotating shaft 601, the detection probe 7 is fixed on the fixing device, the upper crescent block 68 and the lower crescent block 69 are fixed on the outside of the horizontal rod 6 by bolts .

The specific implementation steps are as follows:

(1) Establish a standard field and prepare an AC power frequency electric field measuring instrument within the calibration qualification period;

(2) Simulate the actual AC power transmission and transformation power frequency electromagnetic environment, and set the standard field to operate under a certain power frequency electric field strength value;

(3) Select the bracket used in this embodiment and the traditional bracket to support the monitoring probe of the measuring instrument, according to the standard requirements of "Electromagnetic Environment Monitoring Method for AC Power Transmission and Transformation Engineering" (HJ681-2013), set different ambient humidity in the standard field to carry out Power frequency electric field strength value test.

(4) According to using the same power frequency electric field measuring instrument, in the same standard electric field value and different environmental humidity conditions, the measurement results of the two supports are compared, and the analysis of the support used in this implementation can effectively prevent the environmental humidity from affecting the accuracy of the power frequency electric field strength measuring instrument. degree of influence.

(5) The measurement results of the traditional wooden bracket and the bracket of this example are compared with the following table 1 and Figure 2. When the humidity value is less than 60%, the deviation between the traditional bracket measurement value and the standard value is not large, but when the humidity value is greater than 60% , the deviation value increases sharply; and when using the bracket of this example to measure, when the humidity value required by the national standard is less than 80%, the deviation between the measurement data and the standard value is small, and does not change with the change of the ambient humidity.

Working principle: a support for improving the accuracy of the power frequency electric field measuring instrument. The staff places the support at the position to be measured, opens the wooden support 4, adjusts the positions of the first support 41 and the second support 42, and adjusts the level of the instrument The air bubble in 5 is located in the middle position, and the positions of the first bracket 41 and the second bracket 42 are fixed by adjusting the fastening knob 44, the rubber base 43 is in contact with the ground, and the horizontal rod 6 and the center rod 2 are fixed by the clamp 1, and then the The upper crescent block 68 and the lower crescent block 69 are fixed on the horizontal bar 6 by bolts, and the detection probe 7 is placed on the card slot 61. Turn the knob 63 to drive the screw 62 to rotate, and push the rubber cap 64 to move to the right until it withstands the detection probe 7, the fixing piece 65 is pulled out and stuck on the detection probe 7, and the position of the fixing device can also be adjusted through the rotating shaft 601 below the fixing device so as to observe the data displayed on the detection probe.

The basic principles and main features of the utility model and the advantages of the utility model have been shown and described above. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the utility model In the case of the spirit or basic features, the utility model can be realized in other specific forms; therefore, no matter from which point of view, the embodiment should be regarded as exemplary and non-restrictive, and the utility model The scope is defined by the appended claims rather than the above description, so it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference signs in the claims should not be used claims that are deemed to be limitations.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only includes an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (7)

1. a kind of bracket for improving power frequency electric field measuring instrument accuracy, including fixture (1), center-pole (2), wooden pillar (4)；Its Be characterized in that: the wooden pillar (4) includes first support (41) and second support (42), is inside the first support (41) Hollow structure, the second support (42) are socketed in first support (41) inside, and first support (41) end is equipped with tightly Gu knob (44), first support (41) top is connected on fixed block (8) by movable axis, above the fixed block (8) It is provided with disk (3), there is fixed block (8) uniform welding below the disk (3), be provided with Level tune on the disk (3) Instrument (5), disk (3) middle position have been bolted center-pole (2), are equipped with fixture above the center-pole (2) (1), the fixture (1) is fixed by horizon bar (6) and center-pole (2) by bolt, and the end of the horizon bar (6) passes through bolt There is fixed device, detection probe (7) are fixed on the fixed device.

2. a kind of bracket for improving power frequency electric field measuring instrument accuracy according to claim 1, it is characterised in that: described solid Determine to be welded with limited block (81) on block (8).

3. a kind of bracket for improving power frequency electric field measuring instrument accuracy according to claim 1, it is characterised in that: described the Two brackets (42) end is provided with movable axis, and rubber base plate (43) are connected on movable axis.

4. a kind of bracket for improving power frequency electric field measuring instrument accuracy according to claim 1, it is characterised in that: described solid Determine device middle position to offer card slot (61), be provided with knob (63) on the left of card slot (61), the knob (63) passes through welding It is connected with the screw rod (62) on right side, screw rod (62) other end is provided with rubber cap (64), is set on the right side of the card slot (61) It is equipped with fixing seat (67), the fixing seat (67) is internally provided with spring (66), described spring (66) one end and fixing seat (67) To fixation, spring (66) other end is provided with rotation below the card slot (61) by being mounted on the tops of fixinig plate (65) Shaft (601), rotary shaft (601) lower section are provided with block teeth last month (68), and block teeth last month (68) have been bolted down Moon block teeth (69), block teeth last month (68) are internally provided with spring a (602), are provided with steel ball above the spring a (602) (603), the steel ball (603) and rotary shaft (601) are in close contact.

5. a kind of bracket for improving power frequency electric field measuring instrument accuracy according to claim 4, it is characterised in that: on described Moon block teeth (68) and next month block teeth (69) are bolted on the outside of horizon bar (6).

6. a kind of bracket for improving power frequency electric field measuring instrument accuracy according to claim 4, it is characterised in that: the wood There are three matter bracket (4) is set.

7. a kind of bracket for improving power frequency electric field measuring instrument accuracy according to claim 4, it is characterised in that: the water Flat adjusting apparatus (5) is round pie, and Level tune instrument (5) surface is provided with dial.