JPH044391A - Universal joint for piping - Google Patents

Abstract

PURPOSE:To bend at a desired angle in a desired direction longitudinally and laterally simply by connecting a first pipe and a second pipe with ball shells through an O ring. CONSTITUTION:In a first pipe 1, a ball shell 5 for connection with a concave spherical surface 4 at the inner side is formed at the end, and in a second pipe 2, a ball shell 7 for connection with a convex spherical surface 6 to fit to the concave spherical surface 4 is formed at the end. And an O ring 3 is placed between the concave spherical surface 4 and the convex spherical surface 6. As a result, the first pipe 1 and the second pipe 2 can be bent in a desired direction longitudinally and laterally at a desired angle simply. And a heatproof property can be maintained, and no blocking is generated. Furthermore, an intermediate pipe may be connected between the first pipe 1 and the second pipe 2, or the O ring may be formed in a V-shape section or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a universal joint for piping applied to water supply and drainage.

[Conventional technology]

During piping work, it is necessary to route the piping while avoiding obstacles.

In such cases, conventional methods have been to bend a vinyl chloride pipe by heating it with a torch, use a 90-degree elbow, or use a bellows pipe.

[Problem to be solved by the invention] ・However,
The work of heating and deforming pipes required precision and skill. Further, since the 90-degree elbow is limited to a bending angle of 90 degrees, the range of application is limited. Furthermore, bellows pipes are susceptible to boiling water and have the disadvantage of becoming clogged by dirt and other objects.

Therefore, an object of the present invention is to provide a universal joint for piping that has heat resistance, is free from clogging, and can be easily bent to any angle.

[Means to solve the problem]

The universal joint for piping according to claim (1) includes a first pipe having a connecting spherical shell with a concave spherical inner surface formed at an end thereof, and a connecting spherical shell with a convex spherical surface that fits into the concave spherical surface. The second pipe is provided with a second pipe formed at the end thereof, and an O-ring interposed between the concave spherical surface and the convex spherical surface.

The piping joint according to claim (2) includes a first pipe having a connecting spherical shell with a concave spherical inner surface formed at its end, and a connecting spherical shell with a convex spherical surface that fits into the concave spherical surface. An intermediate pipe having a spherical shell for connection formed at one end and a concave spherical inner surface for connection at the other end, and a spherical shell for connection having a convex spherical surface that fits into the concave spherical surface of the intermediate pipe at the end. interposed between the concave spherical surface of the first pipe and the convex spherical surface of the intermediate pipe, and between the concave spherical surface of the intermediate pipe and the convex spherical surface of the second pipe, respectively. It is equipped with an O-ring.

In the piping joint of claim (3), in claim (1) or (2), the O-ring has a diameter smaller than the inner diameter of the opening edge of the concave spherical surface at the outer periphery of the tip of the convex spherical surface. It is located at a location where

The piping joint of claim (4) has the following features in claim (1):
The O-ring has a substantially V-shaped cross section.

[Effect]

According to the piping joint of claim +1), when the concave spherical connecting spherical shell of the first pipe and the convex spherical connecting spherical shell of the second pipe are fitted together, the first The pipe and the second pipe are connected in communication. Further, since an O-ring is interposed between the convex spherical surface and the concave spherical surface, fluid leakage is prevented. In this case, since the first pipe and the second pipe are connected by a spherical shell, they can be easily bent at any angle in any direction, front, back, left, or right. Moreover, it maintains heat resistance and does not cause clogging.

According to the piping joint of claim (2), in addition to the effect of claim (11), since the intermediate pipe is interposed between the first pipe and the second pipe, The mutual angle of the two pipes can be further increased.

According to the piping joint of claim (3), in addition to the effect of claim (1) or claim (2), the O-ring is connected to the outer periphery of the tip of the convex spherical surface and the inner diameter of the opening edge of the concave spherical surface. Since the O-ring is provided at a position where the diameter is smaller than that of the O-ring, the O-ring does not come into contact with the opening edge of the concave spherical surface when the spherical shells are fitted together, so it is possible to prevent the O-ring from being damaged or falling off.

According to the piping joint of claim (4), in addition to the effect of claim +11, since the O-ring is formed to have a substantially V-shaped cross section, it is possible to prevent fluid leakage due to capillary phenomenon, thereby ensuring reliable operation. Fluid leakage can be prevented.

〔Example〕

A first embodiment of the present invention will be explained based on FIGS. 1 to 7. 6 That is, this piping universal joint connects a first pipe 1, a second pipe 2, and an O-ring 3. have

The first pipe 1 has a connecting spherical shell 5 having a concave spherical surface 4 at its end. Diameter R2 of opening edge 10 of concave spherical surface 4
is formed smaller than the radius R1 of the concave spherical surface 4 so that the convex spherical surface 6 does not come off. This first pipe 1 is manufactured by molding. 11 is a connection part for another pipe (not shown).

The second pipe 2 has a convex spherical surface 6 that fits into the concave spherical surface 4 and is connected with a spherical shell 7 at its end. The radius R3 of the convex spherical surface 6 of this spherical shell 7 is formed to be slightly shorter than the concave spherical surface R1 so that the convex spherical surface 6 can be slidably fitted into the concave spherical surface 4. The radius R4 of the opening edge 12 at the tip is smaller than the radius R2 of the opening edge 10 of the concave spherical surface 4 to facilitate fitting, and the radius R4 of the opening edge 10 of the concave spherical surface 4 is smaller than the radius R2. A circumferential groove 8 for mounting a ring is formed. This second pipe 2 is also manufactured in the same manner as the first pipe 1. The spherical shells 5.7 are connected by heating and press-fitting. 9 is a connection part for another pipe (not shown).

The O-ring 3 is interposed between the concave spherical surface 4 and the convex spherical surface 6. In the embodiment, a rubber seal is used, and the contact surface is made into a curved surface having the same curvature as the convex spherical surface 6, so that the contact surface with the concave spherical surface 4 is increased. This O-ring 3 is attached to the circumferential groove 8.

In this piping universal joint, when the connecting spherical shell 5 of the concave spherical surface 4 of the first pipe 1 and the connecting spherical shell 7 of the convex spherical surface 6 of the second pipe 2 are fitted together, the first The pipe 1 and the second pipe 2 are connected in a communicating state. Furthermore, since the O-ring 3 is interposed between the convex spherical surface 6 and the concave spherical surface 4, fluid leakage is prevented.

In this case, the first pipe 1 and the second pipe 2 are connected to the spherical shell 5.
．． 7, so it can be easily bent to any angle in any direction, front, back, left, or right. Moreover, it maintains heat resistance and does not cause clogging.

Therefore, during piping work, piping can be carried out while avoiding obstacles. Furthermore, when unit piping is performed in advance at a factory or the like using this piping joint, cold pipe construction can be performed in a limited space without applying heat as in the conventional method. In addition, the pipe can be bent to any angle with a simple operation.
It is possible to eliminate the shortage of skilled workers at the site and shorten delivery times. Furthermore, since it is a combination of spherical shells 5.7 and the spherical shells 5.7 can move freely, expansion and contraction of the pipe can be absorbed.

In addition, in this embodiment, since the O-ring 3 is provided at a position on the outer periphery of the tip of the convex spherical surface 6 where the diameter is smaller than the radius R2 of the opening edge 10 of the concave spherical surface 4, the spherical shells 5 and 7 Since the O-ring 3 does not come into contact with the opening edge of the concave spherical surface 4 when the O-rings 3 are fitted together, it is possible to prevent the O-ring 3 from being damaged or falling off.

Furthermore, at least one of the connecting parts 9.11 of the other pipes may be bent at an arbitrary angle.

Incidentally, after the first pipe 1 and the second pipe 2 are bent at a desired angle at the construction site, the spherical shells 5.7 may be fixed to each other with an adhesive or the like, if necessary.

A second embodiment of this invention is shown in FIGS. 8 and 9.

That is, this piping joint has an intermediate vibe 13 connected between the first pipe 1 and the second pipe 2. The first pipe 1 and the second pipe 2 are similar to those in the first embodiment.

The intermediate pipe 13 has a convex spherical surface 6' that fits into the concave spherical surface 4 of the first pipe 1 and a spherical shell 7' for connection at one end, and a spherical shell 7' for connecting the convex spherical surface 6 of the second pipe 2. A spherical shell 5' for connecting the concave spherical surface 4' that fits into the shell 7 is formed at the other end. The spherical shell 5.5' and the spherical shells 7, 7' are formed in the same shape. In addition, the convex spherical surface 6' of the intermediate pipe 13
A circumferential groove 8' is formed on the outer periphery of the tip of the O-ring 3 at a position where the diameter is smaller than the radius of the opening edge 10' of the concave spherical surface 4', that is, at the same position as the circumferential groove 8 of the second pipe 2. Same as O
Ring 3' is attached.

According to this embodiment, the first pipe 1 and the second pipe 2
Since the intermediate pipe 13 is interposed between the first pipe 1 and the second pipe 2, the mutual angle between the first pipe 1 and the second pipe 2 can be further increased. There are other effects similar to those of the first embodiment.

A third embodiment of the invention is shown in FIGS. 10 to 12. That is, in this piping joint, the O-ring 3 is formed to have a substantially V-shaped cross section. In the embodiment, extending portions 14 are formed on both sides to widen the contact surface, and correspondingly, extending portion seats 15 are stepped on the sides of the circumferential groove 8. The rest is the same as the first embodiment.

According to this embodiment, since the O-ring 3 is formed to have a substantially V-shaped cross section, when it comes into close contact with the concave spherical surface 4, a gap 16 is formed in the central concave portion, thereby preventing fluid leakage due to capillary phenomenon. This makes it possible to reliably prevent fluid leakage.

The same applies to the O-ring 3' and the circumferential groove 8'.

In addition, in this invention, the O-ring 3.3' has a convex spherical surface 6.
, 6', but it may be formed as a concave spherical surface 4.4'.

〔Effect of the invention〕

In the piping joint according to claim (1), since the first pipe and the second pipe are connected by a spherical shell, it can be easily bent to any angle in any direction, front, rear, left, or right. Moreover, it maintains heat resistance and does not cause clogging. Therefore, there is an effect that piping can be carried out freely avoiding obstacles during piping work.

In addition to the effect of claim (1), the piping joint of claim (2) has the intermediate pipe interposed between the first pipe and the second pipe, so that the first pipe and the second The mutual angle of the pipes can be further increased.

In addition to the effects of claim (1) or claim (2), the piping joint of claim (3) has the O-ring having a diameter smaller than the inner diameter of the opening edge of the concave spherical surface on the outer periphery of the tip of the convex spherical surface. Since the O-ring is provided at a position such that the O-ring does not come into contact with the opening edge of the concave spherical surface when the spherical shells are fitted together, it is possible to prevent the O-ring from being damaged or damaged.

In addition to the effects of claim +11, the piping joint of claim (4) has the O-ring formed in a substantially ■-shaped cross section, which prevents fluid from leaking due to capillarity, thereby ensuring that the fluid is not leaked. leakage can be prevented.

[Brief explanation of drawings]

FIG. 1 is a half-sectional side view of the first embodiment of the present invention;
The figure is a half-section side view of the first pipe, FIG. 3 is a front view seen from the opening edge side of the spherical shell, FIG. 4 is a half-section side view of the second pipe, and FIG. 5 is the opening of the sphere. Front view seen from the edge side,
Fig. 6 is a half-sectional side view of the O-ring, Fig. 7 is its front view, Fig. 8 is a half-sectional side view of the second embodiment in an exploded state, and Fig. 9 is the convex spherical surface of the intermediate pipe. A front view seen from the shell side, FIG. 10 is a partial view of the O-ring of the third embodiment in an installed state, FIG. 11 is a partial view showing the circumferential groove, and FIG. 12 is a half-sectional side view of the O-ring. . 1...first pipe, 2...second pipe, 3...
・O-ring, 4... Concave spherical surface, 5.7... Spherical shell, 6.
... Convex spherical surface Fig. 2 Fig. 3 Fig. 6 Fig. 5 Fig. N 7 Fig. 9 Symbol 4-4391 (O 1□ Fig. 10)

Claims (4)

[Claims] (1) A first pipe having a connecting spherical shell with a concave spherical inner surface formed at its end, and a second pipe having an end having a convex spherical connected spherical shell that fits into the concave spherical surface. A universal joint for piping comprising a pipe and an O-ring interposed between the concave spherical surface and the convex spherical surface. (2) A first pipe having a connecting spherical shell with a concave spherical inner surface formed at one end, and a connecting spherical shell with a convex spherical surface fitting into the concave spherical surface formed at one end, and the inner surface an intermediate pipe having a connecting spherical shell with a concave spherical surface formed at its other end; and a second pipe having a convex spherical connecting spherical shell formed at its end to fit into the concave spherical surface of the intermediate pipe. , an O-ring interposed between the concave spherical surface of the first pipe and the convex spherical surface of the intermediate pipe, and between the concave spherical surface of the intermediate pipe and the convex spherical surface of the second pipe, respectively. Universal joint for use. (3) The O-ring according to claim (1) or claim (2), wherein the O-ring is provided at a position on the outer periphery of the tip of the convex spherical surface and has a smaller diameter than the inner diameter of the opening edge of the concave spherical surface. Universal joint for piping. (4) The universal joint for piping according to claim (1), wherein the O-ring is formed to have a substantially V-shaped cross section.