JPH0214227Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a connector for an oil introduction pipe to an electrical equipment storage box.

Conventional connectors of this type include those shown in FIGS. 1 and 2. In FIG. 1, 1 is a pipe, 2 is a joint body, 3 and 4 are O-rings, 5 is a tapered ring, 6 is a tightening screw, and 7 is a box. In the connection tool shown in FIG. 1, the O-ring 4 is crimped onto the pipe 1 by the tapered ring 5 by tightening the tightening screw 6.
Since it relies only on the two O-rings 3 and 4, there was a risk that the joint body 2 would come out unexpectedly if high pressure was applied during oil filling. In addition, two O-rings 3 and 4 were required as parts other than the joint body 2 and the tightening screw 6, and a tapered ring 5, which required high processing accuracy, was required, resulting in a complicated overall structure.

In Fig. 2, 8 is a pipe, 9 is a joint body,
10 is a tightening screw, 11 is a joint pipe, 12 is a brazing,
13 is a box. The joint body 9 and the joint pipe 11 form a metal touch on the tapered surfaces. In this case, extremely high precision of the metal touch surface is required. Also, brazing 1 to prevent the joint body 9 from coming off.
2 is required, and the joint body 9 cannot be reused after the pipe 8 is sealed off as shown in the imaginary line.

In view of the above-mentioned circumstances, the purpose of this invention is to provide an economical connector that can reliably prevent the connector from being pulled out of the pipe with an extremely simple structure and eliminates the need for disposable parts. It is.

An embodiment of this invention will be explained based on FIG. 21 is a pipe for introducing oil, and 22 and 23 are tightening nuts that are screwed together with the pipe 21 inserted, and both have knurling on their outer peripheries. The lower tightening nut 22 has a recess 2 into which an O-ring 24, which is an example of a seal ring, is fitted.
5 is formed, and the upper tightening nut 23 has the above-mentioned O.
A protrusion 26 is provided to press the ring 24 and press it against the outer surface of the pipe 21. 27 is
This is a box for storing electrical equipment such as a capacitor, a transformer, and a reactor, from which the pipe 21 extends vertically upward, and the base portion is brazed 28. 29 is a flexible tube connected to the upper tightening nut 23, and 30 is its tightening band.

Both the tightening nuts 22 and 23 have a total weight W
is quite large, and has a weight greater than the weight-energized pull-out force that is large enough to prevent the connector A from being pulled out due to the filling oil pressure just before the pipe 21 is sealed off.
That is, the total weight of the two tightening nuts 22 and 23 can prevent the connecting tool A from being pulled out due to the filling oil pressure.

In addition, since the oil-tightness of the pipe 21 is ensured by the O-ring 24 which is pressed against the outer surface of the pipe 21 by tightening both tightening nuts 22 and 23, very high oil pressure is applied when sealing off the pipe 21. There is no risk of oil leakage, and there is also no risk of the connector A being pulled out unexpectedly. Moreover, the structure for this purpose is extremely simple and there is no need to dispose of any parts, so the overall implementation is very economical.

Note that the connector A may be connected to the flexible tube 34 via a ball socket 31, a female coupler 32, and a male coupler 33, as shown in FIG.

As described above, the connector for the oil introduction pipe to the electrical equipment storage box of this invention has a seal ring through which the pipe in a vertical position is passed, and a seal ring through which the pipe is passed through with this seal ring positioned between. and a tightening nut having a concave portion on one of opposing surfaces in which the seal ring is fitted, and which presses the seal ring onto the outer surface of the pipe by being screwed together, the total weight of the tightening nut being Since the weight-energized retaining force is set to be greater than the force sufficient to counter the disconnection force of the connector due to the filling oil pressure, it is possible to ensure oil tightness and to prevent disconnection, while making the structure extremely simple and economical. It has the effect of being a target.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional example, Fig. 2 is a sectional view showing another conventional example, Fig. 3 is a sectional view showing an embodiment of this invention, and Fig. 4 is a sectional view showing another example of use. It is a front view of a partial breakage. 21... Pipe, 22, 23... Tightening nut,
24... O ring (seal ring), 25... recess, 27... electrical equipment storage box, A... connection tool.

Claims (1)

[Scope of utility model registration request] A seal ring through which a pipe in a vertical position is passed, and a recess into which the pipe is passed so that the seal ring is positioned between them, and a recess into which the seal ring is fitted, on one of the opposing surfaces, and the seal ring is screwed together. and a tightening nut that presses the seal ring onto the outer surface of the pipe, and the total weight of the tightening nut is set to a weight biasing force that is large enough to resist the pulling out force of the connector due to the filling hydraulic pressure or more. A fitting for the oil introduction pipe to the electrical equipment storage box.