JPS604687A - Connector for pipe - 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 pipe connecting device for connecting opposite ends of linearly arranged pipe bodies to each other.

Conventionally, a joint that linearly connects tubular bodies is called a coupling, and its connection methods have been divided into two main types: a screw-in method and a socket welding method.

If the connection method described above is used, it is necessary to rotate the tubular bodies to connect them, and since the tubular bodies must be rotated when connecting or opening tubular bodies facing each other, it is not only very time-consuming but also difficult to do so depending on the circumstances. In some cases, it was even impossible to perform proper connection or opening operations.

Therefore, devices have been developed that connect or open tubular bodies without rotating the tubular bodies, that is, by simply rotating the union nut. Even if it were possible to do so, it was extremely difficult to ensure a secure seal at the connection at the end of the tube.

(This is for the purpose of preventing leakage from joints between pipes and pipes, etc.); Soaking is inserted at appropriate points at pipe connections to prevent leakage from joints of equipment, etc. that are connected to tubular bodies or pipes. A lot of research has been done on how to do this, and various pipe connection devices have been developed.

However, no pipe connecting device has yet been developed that does not require any threading or other various processing on the surface of the tubular body and is extremely easy to handle during pipe construction, inspection, and maintenance. The inventor of this application focused on this point and developed a system that is easy to assemble and disassemble, provides reliable sealing, and prevents the pipe from being pulled out of the pipe connection device even if an unexpected external force is applied to the piping section. For this purpose, we developed a pipe connection device.

Next, the specific structure of the reservoir to achieve this purpose is as shown in the figure, at both ends of the inner circumferential surface, and near these positions, the diameter becomes larger with a steep slope toward the outer circumferential end of the joint body 1. A portion of the tapered inclined surface a is formed, and this tapered inclined recess 1
An elastic airtight member 3 made of rubber or the like and a stop ring are inserted from the front position between the surface a and the tapered sloped surface having a relatively gentle slope facing the opposite side compared to the joint. 11 and an elastic member 8 for holding a member such as a cylindrical body, a cylindrical body, or a gear-like structure having a protruding peripheral edge for locking are interposed in parallel, and the tightening is performed by the ring body 4 on the joint body 1. When tightening by screwing and rotating, the stop ring 11 is sometimes held at an intermediate position, and a member holding member having an elastic airtight member 3 and a protruding peripheral edge for locking a cylindrical body, cylindrical body, or gear-like structure is attached on both sides thereof. While disposing the elastic member 8 for use, the portion of the elastic airtight member 3 presses into contact with the portion of the tapered slanted surface 1a, and the locking protrusion of the cylindrical body, cylindrical body, gear-shaped structure, etc. The part of the member-holding elastic member 8 having the peripheral edge is in pressure contact with the part of the tapered inclined surface, and the tightening pad is located at the insertion opening of the connecting chopstick rest 6 located at the outer peripheral end of the ring body 4. The diameter is made slightly larger than the outer diameter of the tube body 6, and the device is located inside the inner peripheral surface of the joint body 1.

Next, to explain the function and effect resulting from the above structure, the elastic holding member 8 and the retaining ring 11 fitted with the member 7 having the edge of the inclined surface a formed on the left and right inner walls of the joint body 1 and the retaining ring 11 are connected to the elastic airtight member 3. The two pipes 6 are inserted into the joint body 1 from both openings of the joint body 1 so as to face each other, and then the annular elastic member 10 for the stopper provided at the center of the joint body 1 is inserted. It is inserted so that the tips of the two tubes reach this position, and then tightening is completed and the screws are screwed together. The elastic member 8 for holding a member such as a cylindrical body, a cylindrical body, or a gear-like structure having a protruding peripheral edge for locking and the elastic airtight member 3 are each held by the function of a retaining ring 11 interposed between these members. The inner wall slopes a and b are strongly pressed and contacted, so that the slopes a and b
Due to the resistance of the part, the elastic airtight member 3 is pressed against the elastic member 8 for holding a member having a protruding peripheral edge for locking a cylindrical body, a cylindrical body, a gear-like structure, etc. on the outer circumferential surface of the tube 6, and the airtightness retaining force is increased. In other words, it exhibits an airtight effect. The cylindrical body is fitted and held at appropriate intervals in the circumferential direction of the elastic member 8 for holding a member having a protruding peripheral edge for locking, such as a groove, a cylindrical body, a cylindrical body, or a gear-like structure. The member 7 having a protruding peripheral edge for locking, such as a cylindrical body or a gear-like structure, rolls when the tube body 6 moves and is strongly pressed by the surface of the tube body 6. It strongly bites into the outer circumferential surface of the tube to prevent the tube from moving in the direction of exiting. The further the tube 6 moves in the direction of withdrawal, the more the portion fA7 with the protruding peripheral edge for locking is inclined.
The pressing force on the pipe increases, further increasing its bite into the pipe, and as a result, the stub is prevented from moving.

Due to the presence of the elastic retaining member 8 and the airtight member 3, even when the tubular body 6 is bent due to ground conditions, etc., and an inclination, that is, a movement bending angle occurs due to the bending, there is no problem due to the presence of the elastic holding member 8 and the airtight member 3. This change can be absorbed and cracks in the pipe can be prevented, and there is no need to thread the pipe, so when connecting the pipe, unlike conventional pipe connections, there is no need to pre-thread the outer or inner surface of the end of the pipe. There is no need for troublesome machining, and work such as connecting or disassembling pipes when constructing or repairing piping is extremely simple.

However, in the pipe connecting device of the present invention, as a means to prevent the pipe body 6 from coming off from the connecting device, the inner wall surface of the ring body 4 is tightened with a gentle slope, and this tapered slope surface is used for tightening. The member 7 having a protruding peripheral edge for locking of a cylindrical body, a cylindrical body, a gear-like structure, etc. is strongly pressed against the outer peripheral surface of the tube body 6 by the part of the cylindrical body, and the member 7 is bitten into the cylindrical body, a cylindrical body, or a gear-like structure. An elastic member 8 for holding a member having a protruding peripheral edge for locking, etc.
The member 7 having a protruding peripheral edge for locking, such as a cylindrical body, a cylindrical body, or a gear-like structure held by the annular body 4, comes into contact with the gently sloped surface of the inner wall of the ring body 4, thereby causing the cylindrical body, cylindrical body, or The member 7 having a protruding peripheral edge for locking, such as a gear-like structure, is tightened when the ring body 4 is tightened against the joint body 1 and moves in the direction of the center 1itb of the tube. The surface is pressed, and eventually the surface of the member having the protruding peripheral edge for locking, such as a cylindrical body, cylindrical body, or gear-like structure, bites into the outer surface of the pipe body due to extremely strong pressure force, resulting in the pipe connection. The tube cannot be removed from the device a;f
i *[Compared to the part above, there are tapers at both end positions of the inner peripheral surface of the joint body 1 and near those positions so that the diameter becomes larger at a steep slope toward the outer circular end of the joint body 1. A member holding member having a protruding peripheral edge for locking, such as an elastic airtight member 3 and a cylindrical body, a cylindrical body, a gear-shaped structure, etc., is formed as a part of the inclined surface a, and the more the slope 1 is i=jm'L, the more the elastic airtight member 3 is tightened. The elastic member 8 is pressed by the inclined surfaces 1 and 1], and the retaining ring 11 is interposed between the elastic members 3 and 8, so that the suppressing action is strong, especially on the inclined surface a. Since the part =;゛+x is negative and has a slope, the elastic airtight member 3 strongly presses the outer surface of the surrounding tube, the side surface of the stop ring 11, and 1'15 of the inclined surface a, resulting in a sealing effect. It has the effect of ensuring that

In addition, the slope of the slope part a is made steeper than the slope of the slope part, and the slope of the slope part is especially steeper than that of the slope part F+',',''. Because the curve is relatively smooth, the elastic airtight member 3 acts as a filler whose main purpose is sealing, whereas the cylindrical body,
The elastic member 8 for holding a member, which has a protrusion for locking such as a cylindrical body or a gear-like structure, or a protruding portion for locking, is a cylindrical body, an internal r. The main purpose of the member 7 is to bite into the outer surface of the pipe body, and the secondary purpose is to provide a sealing effect so that the member 7 can be plowed in as a filler, thereby perfecting the sealing effect that is extremely important when connecting pipes. At the same time, the two conditions of reliably preventing the pipe from being pulled out can be solved at the same time. The member has a protruding peripheral edge for locking formed around the member, so the depth and strength h of the protruding peripheral edge for locking into the contact surface are smaller than in the conventional spherical case a. It becomes extremely large.

In particular, in the case of a gear-shaped structure, the prevention force against tube pullout can be greater than in the case of a cylindrical or cylindrical structure.

[Brief explanation of the drawing]

The drawings show one embodiment of the pipe connecting device according to the present invention, and FIG. 1 shows the pipe connecting device when connecting the pipes. Figure 2 is a front view showing a cross section of a part of the structure before tightening with the ring, and Figure 2 shows the state after tightening the ring. FIG. 3 is a partially cross-sectional front view of the pipe connecting device of the present invention;
The figure is a cross-sectional view of a portion taken along the line XX in FIG. 2, FIG. 4 is a cross-sectional view of a portion taken along the line X-X in FIG. 2, and FIG.
FIG. 6 is a partial side cross-sectional view of a main part of an elastic member for holding a member having a protruding peripheral edge for locking a cylindrical body or a gear-shaped structure, etc.; FIG. It is a partial side sectional view showing the entire concrete shape of the seventh construction. 1 Joint body 2.2' male thread 3 Elastic airtight member 4 Tightening ring body 5.5' female thread 6 Tube body 7 A member having a protruding peripheral edge for locking, such as a cylindrical body, cylindrical body, or +jkt wheel-shaped structure. 8 Elastic member for holding a member such as a cylindrical body, a cylindrical body, or a toothed structure having a protruding peripheral edge for locking 9 Annular groove 10 Elastic member for annular strut 10' Projection 11 Retaining ring a Inclined surface b# Slope C straight section L1 sting! 1 1+l-J X 31st η Sumire 41℃

Claims (1)

[Claims] On the outer periphery of both the left and right ends of the joint body 1, there is a male thread position, and near the position there is a tapered inclined surface a that has a steep slope and a larger diameter toward the outer peripheral end of the joint body 1. and a tapered inclined surface having an inclined surface facing the opposite side which is relatively gentle compared to the degree of inclination of the portion of the inclined surface a formed by the tapered surface. An elastic airtight part side 3 made of rubber or the like, a stop ring 11, and an elastic member 8 for holding a member having a protruding peripheral edge for locking such as a cylindrical body, a cylindrical body, or a gear-like structure are interposed in parallel, and the tightening is performed. When tightening is performed by screwing and rotating the stop ring 4 on the joint body 1, the stop ring 11 is placed in an intermediate position, and the elastic airtight members 3 are attached to both sides of the stop ring 11, and a cylindrical body, cylindrical body, or gear-like structure is attached to the joint body 1. While disposing an elastic member 8 for holding a member having a protruding peripheral edge for locking a body, etc., a portion of the elastic airtight member 3 presses into contact with a portion of the tapered inclined surface a, and at the same time, the cylindrical body, the cylinder The part of the elastic member 8 for holding a member having a protruding peripheral edge for locking a body or a gear-shaped structure etc. comes into pressure contact with a part of the tapered inclined surface, and the tightening is performed at the outer peripheral end of the ring body 4. An elastic member 10 having a diameter wider than the outer diameter of the tube 6 is fitted to the insertion opening of the connection tube 6 located at the tube connection device.