JPS6056950B2 - pipe joining equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a seal press ring portion for pressing a seal fitted externally onto an inlet tube portion against an annular end surface of a socket tube portion by a tightening force from the direction of the tube axis. The friction engineer's member, which is externally fitted onto the insertion pipe part, is applied by a tightening force from the pipe radial direction due to the connection of the dry split cylinders that are divided into two in the circumferential direction on a plane passing through the pipe axis. The present invention relates to a tube joining device having a tube section for a technician to press against the outer peripheral surface of the insertion tube section.

In this type of conventional pipe joining device, the sealing press ring part is divided into two parts in the circumferential direction corresponding to the drying cylinder body, like the engineer's cylinder part, and the sealing press ring part and this part are divided into two parts in the circumferential direction corresponding to the drying cylinder body. The corresponding dried cylinders were connected to each other.

FIGS. 4 and 5 show such a conventional tube joining device.

Here, 09 indicates an inlet pipe part, 010 indicates a socket pipe part, 05 indicates an annular seal, and OA indicates a half-split joint in which a split press ring OIA and a split cylinder body 02A are integrally connected. The two halves of the joined body OA constitute a tube joining device. That is, the double-split joined bodies OA, OA have flanges 02a, 02a) 02b, 0 at both ends in the circumferential direction, respectively.
2b are integrally connected, and opposing flanges 02a, 02b
) 02a and 02b, bolts 07 and 07, and nut 0, respectively.
By drawing each other with 8 and 08, the insertion tube part 0
A ring-shaped friction engineer's member 06 fitted onto the socket 9 is pressed against the outer circumferential surface of the socket pipe part 09, and the socket pipe part 010
For the annular flange 010a continuous at the end, connect the two split joints OA, OA with T bolts 03, 03 and nuts 0, respectively.
4, 04 toward the annular flange 01Oa side, the annular seal 05 is pressed against the annular end surface 010c of the socket pipe portion 010. Therefore, with such a configuration, the joining procedure is (
b) Of the tightening work from the pipe radial direction of both drying cylinders OA and OA, and the tightening work on the annular end surface 010c of the socket pipe part of both drying cylinders 01A and OIA, the former (a) If this is done first, both the joint bodies OA and OA will be integrated with the insertion tube part 09, so as shown in FIG.
Because there is a limit to the amount of insertion into the socket pipe portion 010, the pressing action of the latter (mouth) on the annular seal 05, that is, the honeycomb effect, becomes insufficient, and conversely, the latter (mouth) If we show this first, as shown in Fig. 5, both the joined bodies 0A and 0A expand at an angle with respect to the tube axis, and this time, the insertion by the retaining member 06 due to the former (a) (a) → (mouth) →No matter which procedure (a) was followed, there was a very serious defect in that the watertight effect and the anti-removal effect were contradictory.

The pipe joining device according to the present invention was developed with the aim of eliminating such defects, and has the above-mentioned configuration, in which the sealing press ring portion is used as a sealing press ring portion and the conventional half press ring is integrally connected. It is characterized in that one half cylinder of the retaining cylinder part is integrally connected to the seal press ring part.

According to this, as a work procedure, first, by tightening the integral seal push ring toward the socket pipe side, the pressing action of the seal against the annular end surface of the socket pipe part, that is, the sealing action is sufficiently strong and circumferentially. At the same time, the cylinder axis of one of the half cylinders connected integrally with this sealing press ring part is maintained in a parallel attitude with the tube axis of the insertion pipe part. By tightening the other half-tube in the radial direction of the fixed-side half-tube, the retaining member can be applied uniformly in the circumferential direction to the outer peripheral surface of the insertion tube, and evenly in the tube axial direction. It can be pressed strongly and almost uniformly.

In other words, it has a structure that integrates the seal press ring part while ensuring both sealing action and removal prevention action are sufficiently good and reliable. In addition, the unique advantage of the present invention is that an extremely simple modification of simply installing one of the half cylinders integrally is sufficient. Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a socket pipe part 10 fixed to the end of a cast iron pipe 11.
The figure shows a state in which synthetic resin inlet tube portions 9 are joined using the tube joining device according to the present invention.

The socket pipe portion 10 is formed into an annular seal by tightening a push ring 12 fitted onto the cast iron pipe 11 at multiple locations in the circumferential direction via T-bolts 13 and nuts 14. 15 and the plurality of tightening bolts 16 in the circumferential direction are tightened and pressed against the pipe 11, so that the tube 11 is fixed in a non-removal state. Therefore, 1 is the insertion tube part 9
This is a seal press ring part that is fitted onto the outside of the seal ring, and is constructed as an annular integral body that extends all the way around in the circumferential direction. Reference numeral 2 denotes a retaining cylindrical portion which is similarly fitted onto the outside of the insertion tube portion 9, and is a pair of half-cylindrical bodies divided into two in the circumferential direction along a plane passing through the tube axis of the insertion tube portion 9. 2A, 2
It is composed of B.

In the present invention, one of the two half-cylindrical bodies 2A and 2B (the lower half in the drawing) 2A is integrated with the one-piece annular seal press ring part 1, as shown in FIG. They are arranged in series and constitute an integral cylindrical body A. Double half cylinder body 2
At two locations of the press ring portion 1 located along the direction perpendicular to the dividing planes A and 2B, there are bulging portions 1a that protrude outward in the pipe diameter direction.
, 1a are integrally connected, and these bulging parts 1a, 1a
Nuts 4, 4 are attached to T-bolts 3, 3 in the tube axis direction, which are inserted through holes 1b, 1b formed in the end annular flange 10a of the socket pipe portion 10.
By tightening and screwing them together, the annular seal 5 fitted onto the socket tube section 9 is pressed against the annular end surface 10c of the socket tube section 10. Reference numeral 6 denotes a ring-shaped friction stopper member cut at one point P in the circumferential direction, which fixes a thin metal plate 6B having a large number of stopper protrusions formed thereon by punching it out on the inner peripheral surface of the resin member 6A. It is configured as follows.

With this retaining member 6 fitted externally into the insertion tube part 9 and internally fitted into the lower half-split cylinder 2A, the upper half-split cylinder 2A
B is positioned opposite to the lower half-tube body 2A, and in the opposed state of the flanges 2a, 2a12b, 2b integrally connected to both circumferential ends of both half-tube bodies 2A, 2B, the opposing flanges 2a, 2b12a , 2b.
, 7 are tightened and screwed together to connect the two cylindrical bodies 2A, 2B to each other from the radial direction, and to press the retaining member 6 against the outer peripheral surface of the insertion tube portion 9. . The work procedure is as follows.

With the retaining member 6 fitted inside the lower half-tube 2A, the integral cylindrical body A consisting of the half-tube 2A and the press ring portion 1 is fitted onto the insertion tube portion 9, and then The annular seal 5 is fitted onto the insertion tube section 9, and then the insertion tube section 9 is fitted onto the socket tube section 10.
The end edge 9a of the cast iron pipe 11 is inserted and fitted until its end edge 9a contacts or comes very close to the end edge 11a of the cast iron pipe 11, and then the T bolts 3, 3 are installed and the nuts 4, 4 are tightened and screwed thereon. death,
By pressing the annular seal 5, the insertion pipe part 9 and the socket pipe part 10 are removed.
Ensure watertightness between the In this state, lower cylinder 2A
The axial center maintains a posture parallel to the axial center of the insertion tube portion 9.
Next, the upper cylindrical body 2B is tightened and connected to the lower cylindrical body 2A using bolts 7, 7 and nuts 8, 8, and the retaining member 6 is pressed against the insertion tube portion 9. At this time, the retaining member 6 contracts at the cutting point P, and bites into the insertion tube portion 9 uniformly and strongly both in the circumferential direction and in the tube axis direction.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the pipe joining device according to the present invention,
Figure 1 is a sectional view taken along the line 1-1 in Figure 2, Figure 2 is a front view, and Figure 3 is a sectional view taken along the line 1-1 in Figure 2.
The figure is an exploded perspective view. Incidentally, FIGS. 4 and 5 are cross-sectional views showing conventional ones.
1... Press ring part for sealing, 2... Cylindrical part for preventing removal, 2A, 2B... Half cylinder body, 5...
...Seal, 6...Removal prevention member, 9...
Insertion tube part, 10...Socket tube' part, 10c...
...Annular end surface.

Claims (1)

[Claims] 1. A seal press ring part 1 for pressing the seal 5 mounted on the insertion tube part 9 against the annular end surface 10c of the socket tube part 10 by tightening force from the tube axis direction and the insertion tube part 9. The friction stopper member 6, which is externally fitted to In a tube joining device having a retaining cylindrical portion 2 for pressing against the outer circumferential surface of the insertion tube portion 9, one half cylinder 2A of the retaining cylindrical portion 2 is integrated with the sealing ring portion 1. A pipe joining device characterized by being installed in series.