JP3102327U - Flexible tube leakage prevention mechanism - Google Patents

Abstract

An object of the present invention is to prevent leakage of a fluid so as not to cause displacement and deformation of a rubber ring due to expansion and contraction and rotation of an inner pipe of a flexible tube, and to expect a large deflection angle of the inner pipe.
An outer pipe having an opening at an end, wherein an inner pipe is inserted and connected to an opening of the outer pipe, and an inner pipe is connected to an opening of the outer pipe. A rubber ring 30 tightly fitted on the surface of the movable member 20 is interposed between the movable packing 21 and the rubber ring groove 11, and the movable packing 21 is slidably fitted into the guide groove 12 to form an inner ring. When the pipe 20 rotates and swings, the movable packing 21 slides in the guide groove 12 accompanying the rotation and swing of the inner pipe 20, thereby preventing deformation and displacement of the rubber ring 30, and preventing the inner pipe 20 from rotating. Provided is a mechanism for preventing a flexible tube from leaking, which is formed so as to allow a large rotational swing.
[Selection diagram] Fig. 1

Description

  The present invention relates to a leakage preventing mechanism for a flexible tube, and more particularly, to reduce a fluid leakage of the flexible tube as much as possible, and to relatively rotate the inner pipe inserted into an end opening of the outer pipe. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leak preventing mechanism for a flexible tube capable of giving a deflection angle.

  Conventionally, various existing fluid transport devices use a flexible tube to absorb vibrations so that the transport tube is not damaged due to an earthquake or the like, and have a large elasticity in the installation line of the transport tube. . Thus, when it is not possible to directly install a required position with only a single transport pipe, an arbitrary number of transport pipes are connected to each other using a dedicated pipe joint to maintain a predetermined length. In addition to the connection effect, the dedicated pipe joint must have a function of preventing fluid leakage.

  Thus, referring to FIG. 5, a conventional flexible tube will be described. The flexible tube has an opening at both ends, and comprises an inner pipe 92 into which an end is inserted from the opening. A packing ring 91 and a ring groove 93 are provided at the opening of the outer pipe 90, and a rubber ring 94 for preventing fluid leakage is fitted between the packing ring 91 and the ring groove 93. An inner pipe 92 inserted through the opening of the outer pipe 90 is configured to press against the leak-proof rubber ring 94 to prevent the leak.

  In the above-mentioned conventional flexible tube, when the inner pipe 92 connected to the both ends and a pipeline (not shown) connected to the inner pipe are subjected to an external force, the inner pipe 92 expands or contracts or rotates. . At this time, since the packing ring 91 on the outer pipe 90 does not limit the operation of the inner pipe 92, the length of the packing ring 91 must be reduced. Only then can the flexible tube perform its intended function.

  As shown in FIG. 7, when the inner pipe 92 moves into the outer pipe 90, the rubber ring 94 is interlocked with the fluid leakage preventing ring to reduce the length of the packing ring. As a result, the stopper rubber ring 94 is deformed and displaced, and the function of the stopper rubber ring 94 is reduced, so that the flexible tube cannot sufficiently exert the effect of preventing fluid leakage.

  Thus, since the conventional flexible tube packing ring 91 must be shortened in length, the sealing function of the leak-proof rubber ring 94 is thereby reduced, resulting in fluid leakage. In view of such a defect, the present inventor worked actively on the conventional flexible tube leak-proofing rubber ring, and finally completed the present invention by constantly experimenting and improving it. is there.

  The problem to be solved by the present invention is to provide a flexible pipe with a large rotational deflection angle so as to prevent the leakage of fluid by preventing the displacement and deformation of the rubber ring due to the expansion and contraction and rotation of the inner pipe. There are technical issues that need to be solved in order to be acceptable, and the present invention aims to solve these issues.

  According to the present invention, there is provided an outer pipe having an opening at an end, wherein an inner pipe is inserted and connected to the opening of the outer pipe, and In the opening, a rubber ring closely fitted to the surface of the inner pipe is interposed between a movable packing and a rubber ring groove, and the movable packing is provided at an end of the outer pipe. When the inner pipe is slidably inserted into the guide groove and the inner pipe rotates and swings, the movable packing slides in the guide groove accompanying the rotation and swing of the inner pipe and deforms the rubber ring. And the flexible packing, which is formed so as to prevent large displacement of the inner pipe while allowing the inner pipe to swing greatly, and the movable packing, Is formed on Jo shape, there is provided a leakage prevention mechanism of the flexible tube made is configured not and lose scratch the surface of the inner pipe.

  According to the present invention, since the movable packing slides freely in the guide groove provided at the end of the outer pipe along with the rotational swing of the inner pipe, deformation and displacement of the rubber ring do not occur. Therefore, the effect of preventing the fluid from leaking can be sufficiently exhibited, and the rotation of the inner pipe can be largely swung.

  A movable packing is slidably fitted into a guide groove provided at an end opening of the flexible tube, and a rubber ring for preventing fluid leakage is provided between the outer ring rubber groove and the movable packing. Even if the inner pipe rotates and swings due to an external force, the movable packing slides freely in the guide groove accompanying the rotation swing of the inner pipe, so that the rubber ring is deformed and displaced. The purpose of the present invention is to effectively prevent the leakage of the fluid in the flexible tube with the minimum number of parts, with the aim of preventing the occurrence of the rotation and enabling the large rotation of the inner pipe.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. In the figure, reference numeral 10 denotes an outer pipe. An opening is provided at an end of the outer pipe 10, and a rubber ring groove 11 and a guide groove 12 are provided at a predetermined distance inward from the rubber ring groove 11 at the position of the opening. Further, an inner pipe 20 is inserted into the opening of the outer pipe 10 and fitted therein. Further, a rubber ring 30 for preventing fluid leakage is provided between the rubber ring groove 11 of the outer pipe 10 and the movable packing 21 slidably fitted in the guide groove 12. A feature of the present invention is that a ring-shaped movable packing 21 is slidably provided in the guide groove 12. That is, the movable packing 21 can slide arbitrarily in the guide groove 12 in accordance with the rotational swing of the inner pipe 20. Thus, the rubber ring 30 can sufficiently exhibit the function of preventing fluid leakage without causing deformation and displacement.

  In more detail, as shown in FIG. 1, the present invention has an outer pipe 10, an open port is provided at an end of the outer pipe 10, and a rubber ring is provided at the open port. A groove 11 and a guide groove 12 are provided, and an inner pipe 20 is further provided. One end of the inner pipe 20 is inserted into the opening of the outer pipe 10 and the other end is provided with another pipeline (not shown). ). A rubber ring 30 for preventing fluid leakage is provided between the rubber ring groove 11 and the movable packing 21 slidably fitted in the guide groove 12. A characteristic feature is that a ring-shaped movable packing ring 21 is slidably provided in the guide groove 12 of the outer pipe 10, and the movable packing 21 moves inside the guide groove 12 through the inner groove. It slides freely according to the operation of the pipe 20, thus restricting the operation of the rubber ring 30 to effectively prevent the rubber ring 30 from being deformed and displaced due to the expansion and contraction and rotational runout of the inner pipe 20. The point is that it is configured to be able to.

  Further, as shown in FIGS. 2 to 4, when a pipeline (not shown) connected to the inner pipe 20 receives an external force, the inner pipe 20 expands and contracts and rotates. At this time, the movable packing 21 slides in the guide groove 12 of the outer pipe 10 along with the operation of the inner pipe 20. Thus, the rubber ring 30 can be restricted within the rubber ring groove 11, and deformation and displacement caused by the action of the inner pipe 20 can be prevented.

  In short, according to the present invention, the movable packing 21 is used to limit the moving space of the rubber ring 30, and as the inner pipe 20 expands and contracts and oscillates, the fluid leaks from the flexible tube effectively. The situation can be reduced as much as possible, and furthermore, the movable packing 21 slides in the guide groove 12 accompanying the rotational runout of the inner pipe 20, so that the operation of the inner pipe 20 is restricted. In addition, the deflection angle of the inner pipe 20 can be increased.

  The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified one.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a longitudinal sectional view of a flexible tube according to an embodiment of the present invention. FIG. 2 is a longitudinal sectional view when the flexible tube of FIG. 1 receives an external force. FIG. 3 is an enlarged sectional view of a part a in FIG. 2. FIG. 3 is an enlarged sectional view of a part b in FIG. 2. The longitudinal section of the conventional flexible tube. FIG. 6 is a longitudinal sectional view when the flexible tube of FIG. 5 receives an external force. FIG. 7 is an enlarged vertical sectional view of a part c in FIG. 6.

Explanation of reference numerals

Reference Signs List 10 outer pipe 11 rubber ring groove 12 guide groove 20 inner pipe 21 movable packing 30 rubber ring

Claims (2)

  An outer pipe having an opening at an end, wherein an inner pipe is inserted and connected to the opening of the outer pipe, and the opening of the outer pipe is connected to a surface of the inner pipe. A tightly fitted rubber ring is interposed between the movable packing and the rubber ring groove, and the movable packing is slidably inserted into a guide groove provided at an end of the outer pipe. When the inner pipe rotates and swings, the movable packing slides in the guide groove accompanying the rotation swing of the inner pipe, thereby preventing deformation and displacement of the rubber ring and increasing the size of the inner pipe. A leak preventing mechanism for a flexible tube, wherein the mechanism is formed so as to be able to rotate and swing.   2. The flexible tube according to claim 1, wherein the movable packing is formed in an annular shape so as not to damage the surface of the inner pipe.

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