JPS597074B2 - Patsukin - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a packing used for connection parts of flow piping, and aims to improve the airtightness of the connection parts and to improve the efficiency of pipe connection work.

Generally, flow piping sections are connected by bolting the flanges provided at the ends of the pipes to each other with a packing between them, but not only does the outer diameter of the fastened section become a dog, There are defects such as irregularities in piping dimensions, and the airtight function cannot be maintained due to loss of elasticity of the packing.

There is also a method of connecting the connecting part by covering one pipe end with the other pipe end and inserting a packing into the covering part, but in order to obtain airtightness, the connection must have a tightness. .

This makes connection difficult due to dimensional problems during connection work, and also damages the packing.

Inserting the packing becomes extremely troublesome, especially for movable types that prevent earth and sand from clogging the joints.

This invention has been made in view of the above-mentioned conventional problems, and the cross section of the packing member formed into a ring is hollow into which fluid can be injected. The gist of the packing is that a filament is interposed along the ring direction, and the ring is allowed to expand in the circumferential direction.

To explain in detail below with reference to the illustrated examples, FIG. 1 is a partially broken and developed view of the band material 1 of the packing A of the present invention. A large number of fiber filaments 3 are interposed therebetween.

The packing A shown in FIG. 2 is made by connecting both ends of the band material 1 to form a ring, inverting half the width to form a U-shaped cross section, and sealing the periphery of the opening end 4.

Further, FIG. 3 shows the structure of a packing B in which two rings formed from the band material 1 are inscribed in a double structure, and both side edges of the rings are sealed 4, 4'L.

In the above description, both ends of the band material were connected to form a ring, but the ring may be formed by cutting a tube into rings.

The packings A and B of the present invention having the above-mentioned configurations include a means for injecting air into the ball (injecting from the navel part that acts as a check valve) or a means for injecting air by providing a closable injection port in the sealing part (not shown). Accordingly, a fluid such as air or water is injected into the internal unsealed hollow part to inflate it as shown in Figs. 4 and 5. Since it is possible to inject fluid after inserting B into the piping connection part in a state in which no fluid has been injected, the piping can be connected extremely easily without causing difficulties in connection due to interference.

Furthermore, since the filaments are included in the width direction, the ring can be deformed in the radial direction without being deformed in the axial direction of the connecting tube by fluid injection, so that the connecting members are effectively brought into close contact with each other to maintain airtightness. Ru.

Particularly in the case where the connecting portion is movable, even if it is partially compressed due to the movement, there is no need to worry about it protruding due to bulge in the axial direction.

6 to 11 are cross-sectional configurations of a joint configured to use the packing of the present invention. In FIG. 6, 5 and 6 are tubes forming a flow path, and the tip of one tube 5 is expanded, and the tip of the other tube 6 is inserted into the expanded portion 7.

(Hereinafter, the tube 5 will be referred to as a receiving tube and the tube 6 will be referred to as an insertion tube).

An inner flange 8 is provided at the tip of the expanded portion 7 of the receiving tube 1 by drawing the edge of the tip.

Further, a flared latching collar 9 is formed at the tip of the insertion tube 6.

The outer diameter of this locking collar 9 is smaller than the inner diameter of the inner collar 8.

The packing A of the present invention is fitted between the inner flange 8 and the locking flange 9.

This packing A is inserted from the gap 10 in a flattened state with no fluid injected therein, and at the position shown in the figure, the hollow portion thereof is filled with fluid (including a fluid) and expanded so as to come into close contact with both the pipes 5 and 6.

The substance to be filled may be a gas or a liquid, and a fluid such as a synthetic resin liquid or a substance that solidifies after being filled may also be used.

When the receiving tube 5 has approximately the same diameter as the insertion tube 6, an enlarged portion is formed at its distal end.

This expanded portion may be a stepped expanded portion 7' as shown in FIG. 8, or may be a gently expanded expanded portion 7// as shown in FIG. 9.

When such an expanded portion 7'' is adopted, the bending range of both tubes 5 and 6 becomes a dog.

Furthermore, by connecting the expanded portion with a cylindrical portion 7a as shown in FIGS. 7 and 8, not only can both tubes 5 and 6 be bent over a wide angular range, but also mutual movement in the longitudinal direction can be prevented. It becomes possible.

In the illustrated example, the inner flange 8 and the locking flange 9 are attached to each pipe 5, 6.
Although a part of the pipes 5 and 6 are integrally connected, separate members may be provided by fixing them to each of the pipes 5 and 6.

It is desirable that the inner flange 8 and the locking flange 9 have shapes that gradually become larger or smaller in diameter, but they also include a flange-like locking flange 9' and inner flange 8' as shown in FIG.

In FIG. 6, reference numeral 11 denotes a connecting wire, and 12, 12' denote brackets for attaching the wires, which prevent the two tubes 5, 6 from coming off.

Figure 7 shows connecting flanges 13 and 14 at the outer ends of both pipes 5 and 6.
An example is shown in which each flange 13, 14 is connected to a flange of another pipe 15, 16, respectively.

When the bending range is narrow as in the example shown in FIG. 9, it is desirable to provide a protrusion 1γ on the outer periphery of the insertion tube 6 to prevent the packing B from moving.

Incidentally, FIG. 10 shows an example in which the hanging collar is omitted.

In this embodiment, the distal end of the insertion tube 6 is formed into a straight tube, and the outer periphery of the distal end of the straight tube portion 6a is processed into a spherical surface.

Correspondingly, a spherical receiving portion 18 is formed on the receiving tube 5, and both tubes 5 and 6 are firmly connected by a connecting wire 11.

With this configuration, the insertion tube 6 can be inserted after the packing A is installed inside the expanded portion 7 of the receiving tube 5 and the hollow inside of the packing A is filled with fluid. Since the pipes do not get caught, the bending range of both pipes 5 and 6 can be widened.

FIG. 11 shows an example of a non-movable connection in which the part corresponding to the spherical receiving part 18 is made into a cylinder 19.

As described above, in the present invention, the cross section of the packing member formed in the ring is hollow to allow fluid injection, and a filament is interposed along the circumferential direction inside the wall thickness of the cross section, so that the packing member formed in the ring has a hollow section that can be injected with fluid. The packing of the present invention is characterized by being allowed to elongate, and the packing of the present invention only needs to be inserted into the pipe connection part without any fluid injected, and then the fluid is injected, and the packing can be easily inserted into the connection part, making the pipe connection work easier. It can be carried out efficiently and does not damage the packing itself.

Further, since the packing of the present invention does not deform in the axial direction of the connecting tube even if it is expanded in the ring circumferential direction by fluid injection, the connecting members are kept in close contact with each other and their airtightness is maintained well.

[Brief explanation of the drawings] The drawings show examples of the packing of the present invention and those used therein. 1 is a plan view of a partially broken band material, FIGS. 2 and 3 are sectional views of a packing using the band material, and FIGS. 4 and 5 show an example of a joint configuration. The figure is a sectional view of the configuration after fluid injection, and Figures 6 to 11 are packing A of Figures 2 and 3.
Alternatively, this is an example in which packing B is used in a joint part. 1... Band material, 2... Rubber band material, 3
......Fiber filament, 4...Sealing.

Claims (1)

[Scope of Claims] 1 The cross section of the packing member formed in the ring is hollow into which fluid can be injected, and a filament is interposed inside the wall thickness of the cross section along the circumferential direction. A packing characterized by being allowed to stretch in one direction. 2. The packing according to claim 1, wherein the hollow cross-section of the packing member is formed by inverting half the width of the band ring and sealing the opening edge. 3. The packing according to claim 2, wherein the band ring is formed by connecting both ends of a band material. 4. The packing according to claim 1, wherein the hollow cross-section of the packing member is formed by sealing both side edges of a polymerized ring in which one band ring is inscribed with another band ring. 5. The packing according to claim 4, wherein the polymerized ring is a polymerization of two band rings that connect both ends of a band material.