JPH08334190A - Pipe joint structure - Google Patents

Abstract

PURPOSE: To simply connect a connected pipe member having an outer flange part, improve working efficiency, and facilitate manufacture for the member. CONSTITUTION: In a pair of connected pipe shaped members A, A having an outer flange part 1, the outer flange parts 1, 1 are faced to each other through a seal material 5. A spacer ring body 7 having a gradient surface is brought in contact with the outer surface 3 side of the outer flange part 1, and a fastening outer annulus body 10 having a recessed groove 9 with a pressure contact internal gradient surface 8 is arranged on the circumference thereof. The gradient surface 8 is brought in pressure contact with the gradient surface 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint structure.

[0002]

2. Description of the Related Art Conventionally, as a pipe joint structure for connecting tubular members B, B to be connected having an outer collar portion 41 (as shown in FIG. 7), a flange 20 which is fitted onto a loose member and previously assembled is used.
The outer flange portions 41, 41 of the tubular members B, B to be connected having the above are opposed to each other through the sealing material 45, and the pair of the above-mentioned flanges 20, 20 which are opposed to each other are provided with a plurality of bolt members 42 and nut members 43. It was connected at.

[0003]

However, in such a structure, the minimum unit weight of the set (assembly set) to be transported to the work site is not only the weight of the tubular member B but also the weight of the flanges 20, 20. Since it is added, it becomes quite heavy (may weigh about 50 kg) and the workability of transportation and piping is poor. And, many bolts (about 4 to 12) for connection.
It took a lot of time to tighten the nuts, and it was difficult to work in a narrow space.

Further, the outer flange portion 41 is manufactured (attached) in an assembled set state in which the flanges 20 and 20 are incorporated in the tubular member B.
Manufacturing is difficult because it has to be performed. Further, it is necessary to form the holes 44 for inserting the bolts in the sealing material 45, which is troublesome.

Therefore, the present invention solves the above-mentioned problems,
An object of the present invention is to provide a pipe joint structure capable of easily performing a connecting operation (a piping operation) of a tubular member to be connected having an outer collar portion, improving the work efficiency, and facilitating the production of the tubular member. To do.

[0006]

In order to achieve the above-mentioned object, a pipe joint structure according to the present invention has a pair of connected tubular members each having an outer flange portion, the outer flange portions being interposed with a sealing material interposed therebetween. Facing each other, the spacer ring body having a sloped surface is brought into contact with the outer surface side of the outer collar portion, and the inner surface of the spacer ring body is press-fitted to be in pressure contact with the sloped surface of the spacer ring body. A ring is provided.

The spacer ring body has a half-split shape. Further, the tightening outer ring body has one or a plurality of swingable portions.

[0008]

In comparison with the conventional assembly set of the tubular member for connection having the flange fitted to the loose (according to claim 1), the tubular member, the spacer ring body and the tightening outer ring body are separately provided. Since it is transported and set for the first time at the assembly site, transportation and (piping) connection work are easy.

By tightening the tightening outer ring body, the pressure contact inner slope surface of the concave groove of the tightening outer ring body is pressed against the slope surface of the spacer ring body, and the spacer ring body is pressed by the pressure. Press on the outer surface. Accordingly, the pair of outer flange portions (the pair of connected tubular members) can be firmly connected via the seal material.

In the connecting work of the pair of connected tubular members (according to claim 2), the spacer ring body can be attached to the connected tubular member at the time of connection.

According to claim 3, at the time of connecting the pair of tubular members for connection, the outer collar of the tubular member for connection is expanded while the tightening outer ring body is expanded by the swingable portion. Can be fitted on the part.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing the embodiments.

FIG. 1 shows an embodiment of a pipe joint structure according to the present invention. In this pipe joint structure, a pair of connected tubular members A, A having an outer flange portion 1 are connected to each other by the outer flange portion 1. , 1 are opposed to each other through a flat seal material 5 and are connected to each other. Spacer ring bodies 7 and 7 are in contact with the outer surfaces 3 and 3 of the outer collar portions 1 and 1, and a tightening outer ring body 10 is in pressure contact with the outer surfaces of the spacer ring bodies 7 and 7. .

The outer surface of the spacer ring body 7 has a slightly inclined sloped surface 6. Also, the tightening outer ring body
Reference numeral 10 has a concave groove 9 and pressure-increasing inclining surfaces 8, 8 for press-contacting the inclined surface 6 in the concave groove 9. That is, the groove 9 has a trapezoidal cross section.

The connected tubular members A, A are, for example, a (long) tubular member 11 or an elbow (a curved elbow or the like).
It is like the joint member 12.

As shown in FIGS. 1 and 2, the tightening outer ring body is
10 has a half-split shape. Further, the tightening outer ring body 10 is
Tightening pieces 14, 14 having an insertion hole 15 for a bolt member 21 are formed at both ends of the half body. In addition, the spacer ring body 7 includes the pipe portion 2 which is a body of the pipe member 11 and the joint member 12.
2 has an inner diameter substantially equal to the outer diameter of 2 (Fig. 4 (a))
See).

Then, the tightening outer ring body 10, 10 is formed by a bolt member 21 and a nut member 22 inserted into the insertion holes 15, 15 of the upper and lower tightening piece portions 14, 14 (facing each other). Firmly tightened and connected. The tightening force 13 of the tightening outer ring bodies 10 and 10 acts in the direction of the central axis of the pipe portions 2 and 2 of the pipe member 11 and the joint member 12, respectively.

In FIG. 3, the tightening force of the tightening outer ring body 10 is as follows.
Reference numeral 13 indicates the action given to the spacer ring body 7.
The tightening force 13 causes the tightening outer ring body 10 to move in the direction of the central axis of the pipe member 11 and the joint member 12, so that the pressure contact inner inclined surfaces 8, 8 of the tightening outer ring body 10 are separated by the spacer ring body 7, The sliding contact with the sloped surfaces 6 and 6 of 7 is made.

The spacer ring bodies 7, 7 are pushed to the outer flange portions 1, 1 by the pressure contact inner sloped surfaces 8, 8.
The outer flange portions 1 and 1 are pressed against the sealing material 5. That is, from the inclined surface 8 in the pressure contact, pressure contact forces 18, 18 perpendicular to the seal material 5 are applied via the spacer ring body 7 and the outer collar portion 1.
Therefore, the outer flange portions 1 and 1 of the pipe member 11 and the joint member 12, respectively.
The two are pressed against each other via the sealing material 5, whereby
The pipe member 11 and the joint member 12 are connected.

At the corner 19 where the outer surface 3 of the outer collar 1 and the tube portion 2 intersect, a chamfered portion 16 that is slightly (rounded or straight) cut is provided at the portion where the spacer ring body 7 contacts.
The 16 allows for the curve of the corner 19. In addition, thereby, the outer collar portion 1 outer surface 3 and the spacer ring body 7
Surely presses.

In FIG. 4, the shape of the spacer ring body 7 is shown. (A) is the above-mentioned spacer ring body 7 in a half shape, and (b) is a ring shape which is another embodiment. The spacer ring body 7 is shown. In the case of the ring-shaped spacer ring body 7, the connected tubular member A as shown in FIG.
The two spacer ring bodies 7, 7 are externally fitted, and then the outer flange portions 1, 1 are formed by bending.

FIG. 5 shows another embodiment of the tightening outer ring body 10, in which three arc-shaped pressure contact members 27 ... (Welding, rivets, etc.) are provided inside the belt 26 having a C-shape in appearance. (Fixed by), and a gap having a predetermined size is provided between the press contact members 27, 27. The belt 26 in the gap is the swingable portion 17.

Further, 29 is a connecting member for connecting both ends of the belt 26, and the connecting member 29 is a quick latch.
34, a bolt 37 pivotably attached to the connecting pin 28, a nut 30 screwed to the bolt 37, a trunnion 38, and the like.

The connecting member 29 is opened to tighten the outer ring body 10 for tightening.
Is attached from the outer peripheral side of the outer collar portions 1, 1 on which the spacer ring bodies 7, 7 (similar to FIG. 1) are arranged, and then the connecting member
Is closed and the nut 30 is tightened, the groove 9 of the press-contact member 27 has a trapezoidal cross-sectional shape (similar to FIG. 1), so that a strong connection is achieved as in the previous embodiment.

FIG. 6 shows another embodiment, in which a plurality of arc-shaped pressure contact members 27 ... Are connected by a connecting pin 36. That is, the pivotally connected portion by the connecting pin 36 corresponds to the swingable portion 17. The connected pressure contact member
Projecting pieces 33, 33 are formed at both ends of 27. A bolt member 31 is pivotally attached to one of the protrusions 33 by a connecting pin 28 so as to be swingable, and a butterfly nut 32 is screwed to the bolt member 31.

Then, the butterfly nut 32 is hooked and tightened on the other projecting piece portion 33 having a bifurcated shape, whereby the pressure contact members 27 ... (Equally functioning as in FIG. 3) are evenly spaced. (Not shown).

[0027]

Since the present invention is configured as described above, it has the following effects.

(According to the pipe joint structure according to the first aspect), each component required for the pipe connecting work is divided and the weight is reduced, so that the carrying and connecting work becomes easy. In addition, the work can be easily performed without requiring skill and the efficiency is improved.

Further, the manufacturing process for forming the outer flange portion 1 on the connected tubular member A becomes easy. Furthermore, since it is not necessary to form a hole for inserting a bolt in the sealing material 5, the sealing material 5 can be a standard (general) one, so that the manufacturing efficiency is improved and the cost is reduced. It

Since it has a half-split shape (according to the pipe joint structure according to the second aspect), it is convenient to be easily attached to the tubular member A to be connected and convenient for work in a narrow space. Further, since the parts can be divided, the weight of each part is reduced, and the work is facilitated.

(According to the pipe joint structure of the third aspect), a sufficient tightening effect can be obtained with a connecting member or the like at one location, the efficiency of connection work is improved, and even work in a narrow space is easy. Can be tightened.

[Brief description of drawings]

FIG. 1 is a structural explanatory view showing an embodiment of a pipe joint structure of the present invention.

FIG. 2 is a sectional view taken along line CC of FIG.

FIG. 3 is a sectional view of an essential part of a pipe joint structure.

FIG. 4 is a state diagram showing a shape of a spacer ring body.

FIG. 5 is a plan view showing another embodiment of the tightening outer ring body.

FIG. 6 is a plan view showing another embodiment of the tightening outer ring body.

FIG. 7 is a structural explanatory view showing a conventional example.

[Explanation of symbols]

 1 Outer Collar Part 3 Outer Surface 5 Sealing Material 6 Gradient Surface 7 Spacer Ring Body 8 Gradient Surface in Pressure Welding 9 Groove 10 Tightening Outer Ring Body 17 Swingable Portion A Tubular Member for Connection

Claims (3)

[Claims] 1. A pair of connected tubular members A, A having an outer flange portion 1 are made to face each other with a sealing material 5 between them, and the outer flange portion 1 has an outer surface 3 side. A spacer ring body 7 having a sloped surface 6 and a tightening outer ring body 10 having a concave groove 9 with a pressure-contacting inner sloped surface 8 in pressure contact with the sloped surface 6 of the spacer ring body 7, A pipe joint structure characterized by being provided. 2. The pipe joint structure according to claim 1, wherein the spacer ring body 7 has a half-split shape. 3. The pipe joint structure according to claim 1, wherein the tightening outer ring body 10 has one or a plurality of swingable portions 17.