JP3100171U - Thin flexible pipe fitting without packing - Google Patents

Abstract

The present invention provides a thin flexible pipe joint without packing that can eliminate packing by inclining an enlarged diameter portion of the thin flexible pipe by 45 degrees and further improve durability.
SOLUTION: A cap nut 2 provided at both ends of a thin-walled flexible tube 1 is provided. As a stopper for the cap nut 2, both ends of the thin-walled flexible tube are inclined at 45 degrees to expand the diameter to be bent inward to be doubled. This is a thin-walled flexible pipe joint having the formed enlarged diameter portion 5.
[Selection diagram] Fig. 1

Description

Detailed description of the invention

The present invention relates to a thin flexible pipe joint without packing used for connection between pipes.

Conventionally, a flexible pipe joint for connecting between pipes is formed by cap nuts provided at both ends of the flexible pipe and inclined at 45 degrees to both ends of the flexible pipe to prevent the cap nut from coming off. A female screw engraved on the inner wall of the cap nut and a male screw engraved on the outer wall of the fitting to be connected are screwed together to connect the two.

At this time, the reduced-diameter portion formed by inclining the cap nut at 45 degrees pushes the enlarged portion formed by inclining the flexible tube end by 45 degrees in the direction of the pipe in accordance with the rotation of the cap nut, and the end face of the metal fitting is pushed. The end face of the enlarged-diameter portion of the flexible tube is brought into pressure contact with the inside of the tube to structurally shut off the inside and the outside.

Issues that the device is trying to solve

The reduced diameter portion formed by inclining at 45 degrees to the cap nut of the flexible pipe joint pushes the enlarged portion formed by inclining by 45 degrees to the end of the flexible tube in the direction of the pipe according to the rotation of the cap nut, and Is pressed against the end face of the enlarged diameter portion of the flexible tube to structurally shut off the inside and outside of the tube.

In addition, in the above structure, when a thin flexible tube is used, an internal pressure is generated in the flexible pipe joint, and when the corrugated tube portion of the flexible tube tends to expand, both ends are fixed. Is bent, a pulling force is generated on the end face of the enlarged diameter portion, and the thin flexible tube is more likely to come off.

Means for solving the invention

The thin flexible tube is superior in vibration and displacement to the flexible tube, but the strength of the enlarged end portion at both ends is lower than that of the flexible tube due to the thin wall. By bending the outer periphery of the tube inward to make it double, the wall thickness becomes thicker than that of the conventional flexible tube, thereby increasing the strength.

In addition, since the end face of the enlarged diameter portion is doubled, flexibility is maintained on the end face and the degree of adhesion is improved, thereby facilitating tightening.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a view showing an embodiment of a thin flexible pipe joint without packing according to the present invention, which is shown in a partial cross section. FIG. 2 is an enlarged view of a portion A in FIG. 1, and FIG. 3 is an enlarged view of a conventional portion A.

This thin flexible pipe joint without packing comprises a thin flexible pipe 1 made of a corrugated metal pipe and both ends of the thin flexible pipe 1 for preventing the cap nuts 2 provided on both ends of the thin flexible pipe 1 from coming off. The diameter-increased portion 5 formed by inclining and bending at an angle of 45 degrees and the diameter-reduced portion 6 of the cap nut 2 are directly connected to the metal fitting 3 as a pipe-side member.

In the present embodiment, the end of the pipe 4 is provided with a tapered female screw 11, and the straight female screw 7 provided on the cap nut 2 cannot be directly screwed. A metal fitting 3 having a tapered male screw 10 at one end and a straight male screw 8 at the other end is screwed to the pipe 4 in this order.

FIG. 2 shows a structure in which the end portion 9 of the enlarged diameter portion 5 of the thin-walled flexible tube 1 is bent and doubled by inclining at 45 degrees to maintain the flexibility, increase the degree of adhesion, and increase the strength.

FIG. 3 shows a conventional structure in which the end 9 of the enlarged diameter portion 5 of the flexible tube 1 is enlarged.
Figure description

Partial sectional view showing an embodiment of a thin flexible pipe joint without packing according to the present invention. A part enlarged view in FIG. Conventional A section enlarged view

Explanation of reference numerals

1. 1. Thin flexible tube corrugated part Cap nut 3. Metal fittings 4. Piping 5. 5. Thin-walled flexible tube enlarged diameter section 6. Reduced diameter of cap nut 7. Cap nut female screw Metal fitting straight male screw 9. 9. Thin-walled flexible tube enlarged-diameter end portion 10. Metal fitting taper male screw Piping taper female screw

Claims (1)

Cap nuts provided at both ends of the thin-walled flexible tube, and both ends of the thin-walled flexible tube are tilted at 45 degrees to increase the diameter to prevent the cap nut from coming off, and are bent inward to be doubled to increase the diameter. A thin flexible pipe joint characterized by being formed.

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