JP2858393B2 - Branch pipe fitting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a branch pipe joint for connecting pipes at the end of a pipe to pipe at the same time.

[0002]

2. Description of the Related Art There is a housing type in which a discontinuous end portion is tightened while a constant gap is maintained in a pipe-to-pipe connected to one of conventional pipe joints. The housing of this type of pipe joint has a bolt fastening mechanism at a cylindrical discontinuous point where one end in the circumferential direction is discontinuous,
It has an inner circumferential edge at both ends in the axial direction of the cylindrical shape, and has a structure in which the inner diameter is reduced by fastening bolts. The cylindrical axial cross section for sealing a pipe to be connected to the inner surface has a C shape.
A rubber sleeve of an internal pressure sealing type having a shape is mounted, and the lip of the rubber sleeve is brought into uniform contact with the entire circumference of the pipe end by tightening the housing.

[0003] Pipe fittings of this kind are found, for example, in German Patent Nos. 2,428,101, Japanese Patent Nos. 10,322,534 and 1,157,955, and there are practically extremely satisfactory pipe-to-pipe connections. However, it cannot be used as a branch pipe joint for connecting pipes that further branch at the pipe-to-tube butt.

As a method of branching a pipe, there is a method of piercing a part of the pipe and connecting a branch pipe thereto, and a method of simultaneously connecting a branch pipe to a butt portion of a pipe-to-pipe connection. There is a casting type as a branch pipe joint to be used.

[0005] However, a reliable branch pipe joint is not found in a housing type pipe joint. This is considered to be due to the fact that the housing is manufactured by press-molding stainless steel or steel plate, so that it is difficult to integrally manufacture the housing, and that simply connecting the branch portions lacks reliability.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a reliable branch pipe joint in the above housing type pipe joint.

[0007]

[Means for Solving the Problems] The above object, the peripheral cylindrical surface of the branch opening which opens into the housing, possess an end surface forming a curved surface along the cylindrical surface of the housing, forming a groove on the inner surface
A branching socket integrated by welding it has, fitted to the branch socket in the corresponding portion of the branch port of the housing, the distal end
A rubber having a hollow cylindrical portion formed by projecting a protruding portion forming a tongue portion which is fitted into the groove portion, and a contact seat located on a tube end surface of a tube- to- tube to be connected to face each other. When the sleeve is attached to the inner surface of the housing and the protrusion of the hollow cylindrical part of the rubber sleeve is
Both are achieved by providing a branch pipe joint in which a tongue is fitted into a groove and brought into close contact therewith.

[0008]

In the above means, since the curved surface along the cylindrical surface of the housing is formed on the end surface of the branch socket, it is easy to fix and integrate the branch socket on the peripheral cylindrical surface of the branch opening opened in the housing. Become. Then, the corresponding portion of the branch opening of the housing of the rubber sleeve mounted on the inner surface of the casing is protruded and opened, and the protruding portion of the hollow cylindrical portion having a hollow is closely fitted and inserted into the branch socket, and the close contact seat is opposed. watertight, oil-tight, to form a branch pipe joint having an airtight conduit by close contact with the end surface of the pipe-to-pipe to be connected to.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 has a tightening mechanism including a tightening plate 11, a tightening bolt 12, and the like at a cylindrical discontinuous portion where one end in the circumferential direction is discontinuous.
An inner pressure sealing type rubber sleeve 2 for sealing a pipe to be connected is mounted on an inner surface of a housing 1 having
6 shows a branch pipe joint in which a branch socket 5 having an end surface 4 having a curved surface along the cylindrical surface of the housing 1 as shown in FIG.

In this branch pipe joint, as shown in FIGS. 7A and 7B, a branch port 3 is opened in the housing 1, and an end face 4 is formed on a cylindrical surface around the branch port 3 by a cylindrical surface of the housing 1. 2 to 5 are integrated by welding 10 as shown in FIGS. 2 to 5, and a rubber sleeve mounted on the inner surface of the housing 1 on the inner surface of the socket 5 for branching. Branch 3 of housing 1 of 2
A hollow cylinder having a hollow 6 consisting of a protrusion 7 formed by projecting a portion corresponding to the above, and a contact seat formed so as to be in close contact with the tube end face of the tube to tube to be connected to be opposed. The protruding portion 7 of the protruding portion 8 is closely fitted to the branch socket 5 so as to be water-tight, oil-tight, and air-tight. In the drawings, A and B are pipes to be connected to each other while maintaining a certain gap C.

Next, with reference to FIGS. 2 to 5, a specific example of a hollow cylindrical portion formed with a branch socket and a protrusion of a rubber sleeve will be described. FIG. 2 shows a first reference example. In this reference example, the protruding portion 7 of the hollow cylindrical portion 8 of the rubber sleeve 2 is inserted into the branch socket 5, and the tip thereof is connected to the branch socket 5. The end portion 5b of the branch pipe connection screw portion 5a formed on the inner surface is brought into contact with the end portion 5b to be watertight, oiltight, and airtight. In the branch socket 5 in which the screw portion 5a is not formed, a step portion is separately formed on the inner surface thereof. With this structure, the tightness between the inner surface of the housing 1 where the branch socket 5 is fixed, the inner surface of the branch socket 5 and the rubber sleeve 2 can be simultaneously secured by the tightening mechanism of the housing 1.

[0012] Figure 3 shows a second reference example, the participation
In considered example, the protruding portion 7 of the hollow cylindrical portion 8 of the rubber sleeve 2, its outer surface is formed on the conical taper surface 7a, the branch pipe connecting screw 5a on the inner surface to the tapered surface 7a of the projection 7 The corresponding tapered surface 5c is fitted into the branching socket having the formed tapered surface 5c, and the tapered surface 7a and the tapered surface 5c are in water-tight, oil-tight, and air-tight contact. In this structure, the compressive force from the close contact seat 8a of the hollow cylindrical portion is converted into a compressive force toward the inside of the hollow of the protruding portion 7 by the tightening of the tightening mechanism, and the inner surface of the branch socket 5 and the outer surface of the protruding portion 7 are converted. Adhesion with is further improved.

FIG. 4 shows an embodiment of the present invention . In this embodiment, the projection 7 of the hollow cylindrical portion 8 of the rubber sleeve 2 has a tongue 7b formed at the tip thereof outward. ,
The tongue 7b is fitted into the groove 5d, and the tongue 7b and the groove 5d are in close contact with each other, and the watertight, oil-tight, Closely airtight. This structure has an internal pressure sealing-type adhesion performance through the passage of various fluids.

FIG. 5 shows an application example of the present invention .
In the embodiment shown in (1), a hollow spacer 9 made of a hard material penetrates the inner surface of the hollow cylindrical portion 8. However, the difference from FIG. 4 is that no branch pipe connection screw is formed on the inner surface of the branch socket 5. In the structure in which the spacer penetrates into the hollow cylindrical portion 8, the inner diameter of the housing becomes small when the housing 1 is tightened by the tightening mechanism of the housing 1,
When the rubber sleeve 2 is brought into close contact with the outer surface of the tube, a gap occurs between a contact portion between the rubber sleeve 2 and the inner surface of the housing 1.
Due to this displacement, the hollow cylindrical portion 8 of the rubber sleeve 2 is deformed, and the possibility that the tip of the protruding portion 7 and the inner surface of the branching socket 5 become inconsistent with each other can be eliminated. The compressive force of the close seat 8a of the cylindrical portion 8 is
, And efficiently transmitted to the tip of the hollow cylindrical portion 8 without escaping to the inside, thereby maintaining good and stable adhesion.

Next, FIG. 8 shows an embodiment of a branch pipe joint in which the structure of the housing is different from the above embodiments. This branch pipe joint has a tightening mechanism including a tightening plate 11, a tightening bolt 12, and the like at a cylindrical discontinuous portion where one end in the circumferential direction is discontinuous.
An inner pressure sealing type rubber sleeve 2 for sealing a pipe to be connected is mounted on an inner surface of a housing 1 having a housing 1, and a branch socket 5 is formed outwardly as shown in FIGS. Basically the same in point, the housing 1 is divided into two parts by a dividing part 16 and connected by a hinge 14 and a plate 15 to provide a hinge-like function for easily expanding a discontinuous portion of the housing 1. They differ in that they are added.

[0016]

Since the present invention has been made as described above,
It has the following effects. Since the curved surface along the cylindrical surface of the housing is formed on the end surface of the branch socket, it can be easily fixed to and integrated with the peripheral cylindrical surface of the branch opening opened in the housing, and a rubber sleeve is provided on the inner surface of the branch socket. The protruding hollow cylindrical portion is fitted and the branch socket and the protruding portion of the hollow cylindrical portion are brought into close contact with each other, so that a watertight, oiltight and airtight highly reliable branch pipe joint is formed. Special
The tongue is formed on the branch socket with a groove on the inner surface
Insert the protrusion of the hollow cylindrical part of the rubber sleeve into the groove
The structure that fits the tongue in close contact with the
To increase the internal pressure sealing type adhesion performance .

Therefore, an excellent branch pipe joint can be provided in a housing type that is press-molded.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a branch pipe joint according to the present invention.

FIG. 2 is a detailed sectional view showing an internal structure of a main part of a branch pipe joint as a reference example .

FIG. 3 is a detailed sectional view showing another embodiment of the internal structure of the main part of the branch pipe joint as a reference example .

FIG. 4 is a detailed sectional view showing another embodiment of the internal structure of the main part of the branch pipe joint according to the present invention.

FIG. 5 is a detailed sectional view showing another embodiment of the internal structure of the main part of the branch pipe joint according to the present invention.

FIG. 6 is a sectional view showing an embodiment in which a curved surface is formed on an end surface of a branch socket of a branch pipe joint according to the present invention.

FIG. 7 is a cross-sectional view showing an embodiment of the opening of the casing of the branch pipe joint according to the present invention, wherein FIG.
(B) is an axial sectional view.

FIG. 8 is a cross-sectional view showing another embodiment of the housing of the branch pipe joint according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Rubber sleeve 3 Branch port opened to housing 4 End face 5 Branch socket 5a Screw part 5b Step part 5c Tapered surface 5d Groove 6 Hollow 7 Projection part 7a Tapered surface 7b Tongue part 8 Hollow cylindrical part 8a Adhesive seat 9 Spacer 10 Welding

Claims (1)

(57) [Claims] To 1. A peripheral cylindrical surface of the branch opening which opens into the housing, possess an end surface forming a curved surface along the cylindrical surface of the housing, and integrated by welding to fix the branching socket forming a groove on the inner surface, The branch socket is inserted into the corresponding location of the branch port of the housing, and the tip is inserted into the groove.
A protrusion for forming a tongue, a rubber sleeve having a hollow cylindrical portion which contact seat was formed so as to protrude respectively located pipe end-face of the tube-to <br/> pipe to be connected to face of the housing Attached to the inner surface, the protrusion of the hollow cylindrical part of the rubber sleeve is inserted closely into the branch socket, and the tongue is inserted into the groove
Branch pipe joint characterized by close contact .