JPS5949169A - Terminal structure for high pressure liquid sealed device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a terminal structure for a high-pressure compact encapsulated device, and in particular to a terminal structure for an internal bong motor etc. that is used while being immersed in a high-pressure liquid, for electrically connecting it to the outside. This article concerns the terminal structure of the partitioning pressure liquid-filled equipment that is introduced.

The terminal structure of a conventional high-pressure liquid (e.g., water, silicone oil, Freon number) sealed steamer is as shown in FIG. +11 connection end 2 and solder them together, and then half L1. I (・ Heat absorption in the J part
It is insulated with tube 5. The opening bushing 4 was provided with an O-ring 6 for knotting, and the opening bushing 4 was held down by a rubber cap 7, and this rubber cap 7 was held down by a nut 8. However, according to this structure, the m-body stud 3 is
-): Since it is an ηφ body cylinder, the temperature of yly + i child has increased abnormally due to some reason υ, or the pressure of the surface pressure has increased abnormally 8! In this case, the insulation of the lead bushing 4 is at risk of being destroyed, and at the same time, the o-ring 6 that has been holding the water sole until now is destroyed.
7-L effect was also lost, and there was a risk of liquid spouting out of the aircraft. For this reason, for safety reasons, when handling a heavy-pressure object that will not cause external C-axis leakage, it is recommended that the machine 11' be placed so that the sole of the other part of the terminal section is closed. There was no chance. However, due to the breakage of the lead bushing 4, the main body stud 3, through which the electricity is passed, comes into contact with the terminal terminal, causing a ground fault and causing serious damage to the equipment.

The present invention has been designed to address the above-mentioned points, and its purpose is to minimize leakage of the compressed body even if the insulator of the Ul-extruded bushing ruptures, resulting in high reliability. The terminals of pre-pressure liquid encapsulation equipment are provided at 1-1.

The present invention provides a flange on the tatami stud inside the L1 bluff knob, and the 11 bushing is attached to the equipment (1f).
I! on the 191-inch flange. By inserting a ring-shaped insulator with a smaller inner diameter than the stud flange, even if the insulator of the bushing is damaged, the stud flange can be The tatami stud is pressed against the ring-shaped insulator to minimize the leakage of high-pressure liquid by being pressed against the t4I+, which causes contact with the equipment flange, causing a ground fault. - Be careful, 19
It was designed to achieve the objectives of the R period.

Below, I will explain the details of the present invention with reference to FIG. 1.
Ru.

As shown in the nuclear diagram, in this example, a hollow stud 3 made by Kikai Tsukasa with a flange of 1+ was molded with Ikai quality Kono, and a hard IP+ rubber surface facing the high pressure side was molded. Q I
S with extra groove of J song [J S 304 embedded metal maple 1
1 and molded together, connect the polyethylene i4i wire (fsl) (
Pass the two 'j'f bodies through the holes of the 4+ body studs 3 and braze them at the external tips 9 of the 4+ body studs 3. Insert the polyethylene wire into the opening bushing 4, pull it out from the opening bushing 4, and pull out the polyethylene rt+; 7-The heat yield of polyethylene as a tube 5 is subjected to the treatment, ll! 1j′[1
4. Heat-shrinkable tape 10 on both ends of the heat-containing tube 5, and on the surface pressure liquid immersion page 1 of the bushing 4 on the outside of the sole of the heat-containing tube 5. The same is true for sole properties by applying taping. In addition, an O-ring 6 is inserted into the outlet bushing 4 as a knoll (2) Jfi/Ji.

A bushing 4 is inserted through an insulating ring 12 made of gas and epoxy laminate.

Further, the outlet bushing 4 is held by a cap 7 made of hard rubber from outside the machine, and this cap 7 made of hard rubber is tightened with a nut 8. Furthermore, this hard rubber cap 7 is surrounded by a Teflon cover 13 that holds the cap 7 down.

Because of the presence of the flange of the conductor stud 3, P, and edge ring 12 in this way, even if the molded insulation of the bushing 4 breaks down, the flange of the conductor stud 3 can be attached to the insulating ring 12 due to the high-pressure liquid inside the machine. The insulating ring 12 is inserted to minimize liquid leakage and to avoid contact between the in-machine flange and the conductor stud 3, which also has the effect of preventing ground faults.

Figure 3 shows the temperature of the equipment terminal section at 270C and the internal fluid pressure at 100C.
The relationship between the time when the mold insulation of the lead bushing breaks down and the leakage μ at Kg/cJ is shown. Approximately 13 minutes after the equipment terminal became abnormal with humidity of 270 U and internal fluid pressure of 100 kg/cdl, the molded insulation of the lead bushing broke down. The amount of liquid leaked at this time is as follows: curve A for the conventional system, curve B for the product of the present invention, and curve A'' for the conventional system.
In c, leakage after mold dielectric breakdown is rapidly increasing. On the other hand, with product B of the present invention, the amount of leakage increases slightly when the mold insulation breaks down, but when the stud flange and the insulating ring come to press against each other, the amount of leakage is suppressed to a constant level, and the secondary liquid prevention effect is achieved. is shown. At this time, in conventional method A, the contact between the stud and the equipment frame was 6
Although D ground fault occurred, no ground fault phenomenon was observed in invention B.

According to the ψIM element structure of the sieve liquid filling device of the present invention described above, a flange is provided on the stand inside the outlet bluff knob, and the outlet bushing is attached to the flange to be attached to the tN container, as shown in the front cover C1). Since the ring-shaped insulator with a small diameter is inserted, even if the molded insulator of the bushing 1 breaks down, the flange of the stud 7 will be able to protect the ring-shaped insulator. Pressed against the Ichikawa liquid to minimize leakage,
It is effective in preventing ground faults caused by contact between studs and equipment frames.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing the terminal structure of a conventional high-pressure liquid sealed device, Fig. 2 is a side view showing an embodiment of the terminal structure of the high-pressure liquid sealed device of the present invention, and Fig. 3 is a cross-sectional view showing the terminal structure of a conventional high-pressure liquid sealed device. At the time of single mold dielectric breakdown 1! ] FIG. 2 is a characteristic diagram comparing the Ftt fi time characteristics of the conventional and the present invention. ■...(Kinai Electric Cable, 2...A Kinai Tunen handling section v1
fre 3...Body stud, 4...Outlet bushing, 5...Heat shrinkage tube, 6...0 ring, 7...
...Rubber cap, 8...Nut, 9...External tip, 10...Heat shrink tape, time (minutes)

Claims (1)

[Claims] 1. A conductor stud that connects the inside and outside of the electrical equipment that seals sieve pressure liquid inside the machine, a molded outlet bushing that insulates the conductor stud, and an insulator that presses the outlet bushing from outside the machine. In the terminal structure of a high-voltage multi-unit enclosed device consisting of a body cap and a nut holding the insulator cap, seven langes are provided on the conductor stud located within the mold material, and the lead-out bushing and the contact-out bushing are connected from outside the machine. A terminal structure for a high IF liquid-filled device, characterized in that an insulating ring having a harder hardness than the molding material and having an inner diameter smaller than the diameter of the flange of the conductor stud is pressed between the cap and the cap.