JPH0233185Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tracking resistance test device for measuring the tracking resistance of insulating materials used in electrical equipment, and more particularly to a tracking resistance test device with an improved electrolyte dripping section.

Conventionally, tracking resistance testing equipment that measures the tracking resistance of insulating materials used in electrical equipment is
As shown in FIGS. 1, 2, and 3, a pair of electrodes 3 connected to a power source (not shown) are spaced apart from each other on an insulating sample 2 placed on a sample holder 1. In order to drop the electrolyte onto the sample 2 between the electrodes 3 and 3, an electrolyte dripping section is placed on a panel 4 erected on a base (not shown). 5.

The electrolyte dripping part 5 is connected to one end of the rubber tube 6 through a nozzle 7.
Attach this nozzle 7 between the electrodes 3 and 3, and inject the other end of the rubber tube 6 with NH ₄ cl−0.1%.
It is connected to the lower part of a flask 8 that houses an electrolytic solution consisting of an aqueous solution.

The upper and lower parts of the flask 8 are attached to mounting legs 10 and 11 via fixtures 9, and these mounting legs 10 and 11 are fixed to the panel 4. Also,
A rubber tube 15 is connected to the flask 8 so that the electrolyte in the electrolyte container 13 installed on the mount 12 attached to the panel 4 is supplied by a pump 14, and the surplus electrolyte is returned to the container 13 again. A rubber tube 16 is connected.

Furthermore, at the bottom of the flask 8, there is a pot 1 that can be opened and closed to adjust the electrolyte supplied to the rubber tube 6.
7 is installed.

A pair of press plates 18 are installed in the rubber tube 6 near the pot 17 to be able to press the rubber tube 6 in order to adjust the amount of electrolyte dripped. In order to adjust the degree of pressure on the rubber tube 6, a bolt 19 and a wing nut 20 are attached to the pressure plate 18.

A dropper portion 21 is installed on the rubber tube 6 near the nozzle 7 on a mounting base 22 to which the panel 4 is attached.

This dropper portion 21 is connected to a solenoid 23 installed on a mounting base 23a. As shown in FIG. 3, the operation of the solenoid 23 causes the pusher frame 24 of the dropper section 21 to reciprocate in the horizontal direction, repeatedly pressing and releasing the rubber tube 6 between the pusher 25 and the shaft 25a. , to adjust the dripping amount of electrolyte.

Note that 26 is a mounting leg, and one end of this mounting leg 26 is attached to the frame guide 24a of the pusher frame 24 of the dropper portion 21, and the other end is attached to a support 27 that supports the nozzle 7.

However, in the tracking resistance test device equipped with the electrolyte dripping section 5 having the above configuration, the amount of the electrolyte dripped onto the sample 2 from the nozzle 7 is smaller than 1.
7. By adjusting the pressure plate 18 and the dropper part 21, the recommended standard conditions required by IEC (International Electrical Commission) Law, DIN (German Standards) Law, etc. (for example, 1 drop volume 20 ^±5 mm ³ , dropping It is adjusted to match the period (30 ^±5 sec/times).

However, after completing the adjustment, while measuring the tracking resistance of the sample 2 by applying a voltage to the electrode 3 and dropping the electrolyte, when the dropper part 21 loosened the pressure on the rubber tube 6, the nozzle Air is sucked through the 7 ports, and the electrolyte stops dripping, or two or three drops continue to drip. If such a situation occurs, it becomes impossible to continue accurate testing. For this reason, there was a problem in that the tester had to constantly monitor during the test to prevent the above-mentioned situation from occurring.

The present invention was devised in view of the above-mentioned problems, and its purpose is to provide a tracking resistance test device that is equipped with an electrolyte dripping section for accurately dripping electrolyte, thereby making the test unmanned.

The following is a fourth example of the configuration of the present invention.
This will be explained in detail with reference to the figures and FIG.

In this embodiment, members having the same functions as those in the conventional example described above are designated by the same reference numerals, and detailed explanation thereof will be omitted.

The electrolyte dripping part of the tracking resistance test device according to the present invention includes a driving device 28 and a driving device 28.
While rotating intermittently, one end is connected to the electrolyte container 13.
A swing pump 30 houses an electrolyte transport tube 29 with a nozzle 7 attached to the other end.

The drive device 28 is a mounting base 31 attached to the panel 4.
It is installed in This drive device 28 is provided with a flat plate-shaped cam 33 at the end of a drive motor 32, and the end face of the cam 33 is arranged so as to be able to freely come into contact with the end of a detector 34 consisting of a limit switch. Further, a connecting chain 3 connected to the pump lever 36 is provided on the surface of the cam 33 facing the swing pump 30.
5 are connected.

Note that 37 is a mounting leg that is attached to the panel 4 and supports the detector 34.

A pump lever 36 connected to the cam 33 by a connecting chain 35 is attached to the swing pump 30. This swing pump 30 has a large-diameter roller 39 installed at the center of a circular case 38 and rotatable by a pump lever 36. On the outer periphery of this roller 39, six small-diameter rollers 40 (not shown) that rotate in contact with the roller 39 are arranged at equal intervals on a disc that rotates only in the clockwise direction inside the case 38. It is being Further, a gap smaller than the diameter of the electrolyte transport tube 29 is provided between the outer circumference of each roller 40 and the inner circumference of the circular case 38 . In this gap, there is a notch 38 of the circular case 38.
Electrolyte tube 2 introduced via a, 38b
9 are arranged. The electrolyte tube 29 is discharged from the case 38 through the notch 38b, is introduced into the case 38 again so as to form a substantially U-shape, and is discharged from the case 38 through the notch 38a. Further, the tube 29 has a notch 38a,
It is fixed to the case 38 by fixtures 41a and 41b interposed between the tubes 29 and 29 at 38b.

The electrolyte transport tube 29 is disposed inside the rocking pump 30, and one end thereof is disposed in the electrolyte container 13, and the other end is attached with a nozzle 7, which is connected to the electrode 3, It is located between 3.

Next, the dripping of the electrolyte in the electrolyte dripping section having the above structure will be described.

When the drive motor 32 of the drive device 28 is driven,
The cam 33 rotates and the end of the cam 33 is connected to the detector 34.
pass through contact with. The number of times of contact is displayed (synchronized with a counter), and when a predetermined number of times is reached, the drive device 28 is stopped, and when a predetermined time has elapsed, it is driven again. In this way, driven by a predetermined time setting,
There are repeated stops.

As the cam 33 rotates, the cam 33 and the connecting chain 35
The pump lever 36 connected to the pump lever 36 swings to the right in FIG. Due to this rocking, the rollers 39 become the circumferential axis of rotation, as shown in FIG. 6, and each roller 4
0 rotates in contact with the roller 39, and performs intermittent rotation in which the position is moved by one roller in the clockwise direction. At this time, tube 29, which had been compressed by roller 40,
The compressed part of is released. As the rollers 40 move in position, the compressed and released portions move in only one direction like peristaltic motion. Therefore, the electrolyte is sucked up from the container 13 into the tube 29.
Transported intermittently within the country.

The amount of dripping from the nozzle 7 is determined by the three rollers 4 rotating in a fixed direction in the lower half of the case 38.
0 in a fixed direction within the tube 29. Therefore, no air pockets are generated in the tube 29, and no air is sucked up at the nozzle 7 during dripping.

The amount of electrolyte dropped and the interval between drops are adjusted by adjusting the inner diameter of the tube 29 and the swing angle of the pump lever 36.

As explained above, the present invention provides a tracking resistance test device for measuring the tracking resistance of an insulating material sample using an electrolyte dripped from an electrolyte dripping part between a pair of electrodes. The electrolyte dripping part is intermittently rotated by a drive device 28 having a cam 33 whose end can freely contact the detector 34 and a pump lever 36 connected to the cam 33, and one end is connected to the electrolyte container 13. Since it is constructed by a swing pump 30 that houses an electrolyte transport tube 29 with a nozzle 7 attached to the other end, it is easy to adjust the amount of electrolyte dripped and the interval between drops. In addition, since the drop amount and the drop interval are always maintained in accordance with predetermined conditions, the test can be unmanned and the test can be performed accurately.

[Brief explanation of the drawing]

Figures 1 and 2 are a front view and a side view of the conventional example, Figure 3 is a view taken along arrow A-A in Figure 2, and Figures 4 and 5 are a front view of an embodiment of the present invention. The side view and FIG. 6 are front views of the main parts. 7... Nozzle, 13... Electrolyte container, 28...
Drive device, 29... Electrolyte transport tube, 30...
...oscillating pump, 33...cam, 34...detector,
36...Pump lever.

Claims (1)

[Scope of utility model registration request] In a tracking resistance test device that measures the tracking resistance of a sample by dropping an electrolyte between a pair of electrodes installed on a sample of an insulating material, the electrolyte dripping part is placed in such a way that the end thereof can freely contact the detector 34. cam 33
An electrolyte transport system that is intermittently rotated by a drive device 28 provided with a drive device 28 and a pump lever 36 connected to the cam 33, and has one end disposed inside the electrolyte container 13 and a nozzle 7 attached to the other end. tube 29
1. A tracking resistance testing device characterized by comprising: a rocking pump 30 housing a oscillating pump 30;