JPS5911264Y2 - bag fittings - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention mainly relates to a bag joint suitable for repairing existing buried piping, and more particularly to a split-tube type plastic bag joint.

(B) Prior Art A conventional split-tube type plastic bag joint consists of a split tube made of resin that is connected so that it can be divided into two parts in the circumferential direction, and two split-tube joints at the ends in the circumferential direction. Equipped with a flange section for
Annular circumferential packings are embedded near both ends of the joint in the axial direction, and linearly extending strip packings are circumscribed by these circumferential packings and extend linearly on opposing surfaces of the flange portions.

However, in this joint, when the split tubes are connected, each strip of packing acts as a fulcrum to tighten the outer flange, so the bend that brings the opposing surfaces of the flange closer together connects the joint via the fulcrum. On the inside of the tube, the opposite surfaces are curved to separate them, so there is a problem in that the pressure on the circumferential packing by the inner circumferential wall of the split cylinder is insufficient.

(c) Purpose of the invention This invention was created in view of the above circumstances. When joining the split tubes, the flange part is bent so that the inner circumferential wall of the split tube can sufficiently press the peripheral packing to prevent water leakage from the underground piping. The idea is to make it possible to seal the area.

(d) Structure of the invention The structure of this invention is made of a substantially flexible synthetic resin material, which is joined so as to be divisible into two pieces in the circumferential direction, and has an inward circumference provided near both ends. a packing groove 101, a linear packing groove 102 circumscribing the circumferential packing groove 101 and parallel to the axis;
, a flange portion 103 extending outwardly for said coupling.
and a protrusion 10 provided parallel to the axis on the outermost edge of one of the opposing surfaces of the flange portion 103 and abutting the other surface.
4, a striped packing 200 fitted in the linear packing groove 102, and an annular circumferential ring fitted in the inward circumferential packing groove 101 and having an abutment part 301 at at least one location on the circumference. This bag joint is characterized by comprising a packing 300, a strip 400 for reinforcing the flange, and a fastener 500 for joining the flange.

(e) Examples An example of the present invention will be described below with reference to FIGS. 1 and 2.

Bag joint (hereinafter referred to as "main joint").

) are generally indicated by the symbol 1 on the figure.

A split tube 100 made of flexible resin for enclosing a conduit P has an inward circumferential packing groove 101 near both ends, a linear packing groove 102 circumscribing this and parallel to the axis, and an outer circumferential packing groove 102 parallel to the axis. A flange portion 103 is provided at the flange portion 103, and a protrusion 104 is provided on the outermost edge of one of the opposing surfaces of the flange portions 103, 103, and protrudes in parallel to the axis and abuts on the other surface.

Note that 103 indicates the flange portion on the right side of FIG. 2, but the numbering is omitted.

Below, items for which numbering is omitted are shown in double brackets.

500, C500)... are fasteners for tightening the flange parts 103, (103), respectively, via the strips 400, (400》...) for reinforcing the flange parts, and 200 are fasteners for tightening the flange parts 103, (103), respectively, through the strips 400, (400》...) for reinforcing the flange parts; The strip packing 300 to be fitted is an annular circumferential packing that is fitted into the inward circumferential packing groove 101 and has an abutment portion 301 at at least one location on the circumference.

The strip packing 200 and the circumferential packing 300 are made of natural and/or synthetic rubber depending on the fluid in the conduit P, and may be covered with a layer of poly, tetra, chloroethylene, etc. as necessary. On the other hand, the split tube 100 is made of a resin containing or not containing fibers, fillers, etc.

The above composite resin is a mass-produced product that is injection molded using thermoplastic materials such as polyvinyl chloride, polyacetal, and polypropylene.

The said article 400, (400) is made of a metal material, such as spheroidal graphite cast iron, which has the corrosion resistance necessary when burying the joint 1 and the mechanical properties that can withstand tightening with the fastener 500, (500), by painting or coating. Preferably, the material is subjected to corrosion-resistant surface treatment.

The above fasteners 500, (500)... are bolts.
Although nuts are shown as examples, they are also preferably made of corrosion-resistant steel or the like.

Next, the covering of the conduit P will be explained using the present joint 1 having the above structure.

Although the conduit P is not shown in FIG. 1, it is assumed that there is a leakage point approximately in the center of the figure.

Needless to say, this joint 1 secures a groove space 105 by the protrusion 104 when covering such a water leakage point,
It is possible to divert the direction of the leakage water during the process up to the completion of the covering, and to prevent the flange portion 103 from bending.

That is, in the initial stage of the enveloping work, the flange portion 103,
(103) Row packing 2 that has not been tightened yet
00, the side wall of the protrusion 104 receives the leakage flow ejected from the abutment part 301 of the circumferential packing 300 in a direction substantially perpendicular to the axis, and deflects a part of it in the axial direction, thereby making it difficult to cover the water. The protrusion 10 formed on one of the opposing surfaces of the flange portion 103
4 comes into contact with the other surface and serves as a fulcrum, and the bending of the flange portion due to tightening of the fastener 500 is located inside the fulcrum, so there is almost no weakening of the pressure on each packing and the function of each packing is fully demonstrated. let

By configuring the bag joint 1 as described above, it is possible to reliably seal water leakage points in buried piping with a simple structure having an extremely small number of parts.

Furthermore, when wrapped (combined), the split tube 100, (100
) itself has appropriate flexibility, so it easily conforms to the outer peripheral surface of the conduit P, and the strip hacking 200, c20
0》Not only can the functions of the circumferential hacks 300 and (300) be more fully demonstrated, but also good corrosion resistance of the split tube 100 itself can be expected.

In addition, since the split tube is made of the above-mentioned synthetic resin and has an integral protrusion, and the protrusion has mechanical properties that can withstand tightening, this joint itself is overall lightweight and easy to handle. It can also improve the workability of repairing buried pipes at construction sites, and can also exhibit the necessary pressure resistance.

For one-way packing, a linear packing that is divided into two by a plane parallel to the mating surface of the flange portion may be embedded in the packing groove or bonded, or it may be separated into two and only in one linear packing groove. It may be embedded in or adhered to.

Further, the circumferential packing can also be divided into two along the above-mentioned plane and placed in the inward packing groove in the same manner.

Next, FIG. 3 shows another embodiment.

In this embodiment, this section 410 and (41) of this joint 1 are
0)... is a round bar, and its material may be the same as that of the strip 100 in FIGS. 1 and 2, or it may be made of a drawn material of corrosion-resistant steel.

In addition, both of the sections 410 and (410) are the flange portion 1.
13, (113) can also be fixed near the center of each.

The fastener 510 consists of an inner claw 511, an outer claw 512, and a bolt/nut 513 inserted through these.

The inner claw 511 and the outer claw 512 are preferably made of metal like the strip 400 in FIGS. 1 and 2, or made of a material such as reinforced plastic, such as polyethylene terephthalate mixed with glass fiber.

(f) Effect of the invention This invention is achieved by providing a protrusion on the outermost edge of one of the facing surfaces of the flange portion of the flexible split strip, which is parallel to the axis and abuts on the other surface. When joining the split tubes, the inner circumferential wall of the split tube can sufficiently press the peripheral packing, thereby making it possible to reliably seal water leakage points in buried piping with a simple structure with a small number of parts. be.

[Brief explanation of the drawing]

Fig. 1A is a plan view showing one embodiment of this joint, Fig. 1B is a sectional view taken along line GH in Fig. 2, Fig. 2A is a side view seen from the right side in Fig. 1, and Fig. 2B is a Fig. 1 FIG. 2C is a partial cross-sectional view along C-D-E-F. FIG. 3A is a side view showing another embodiment. FIG. 3B is a partial cross-sectional view at the middle of the fastener. Figure 3C is a partial cross-sectional view taken along a plane passing through the center of the fastener and the circumferential packing. DESCRIPTION OF SYMBOLS 1... Bag joint, 100... Split tube, 101... Peripheral packing groove, 102... Straight packing groove, 103...
Flange portion, 104... Projection, 300... Peripheral packing, 400... This line, 500... Fastener.

Claims (1)

[Scope of utility model registration request] It is made of substantially flexible resin material and has 2 holes in the circumferential direction.
An inward circumferential packing groove 101 provided near both ends, a linear packing groove 102 circumscribing the circumferential packing groove 101 and parallel to the axis, and a flange extending outward from the circumferential packing groove 101 for the coupling. part 103 and the flange part 1
Split tube 10 equipped with a protrusion 104 provided on the outermost edge of one of the opposing surfaces of 03 parallel to the axis and abutting on the other surface.
0, a strip packing 200 fitted in the linear packing groove 102, an annular circumferential packing 300 fitted in the inward circumferential packing groove 101 and having an abutment portion 301 at at least one location on the circumference, and the flange This article 40 is for reinforcing the section.
0 and a fastener 500 for joining the flange portions.