JP3315597B2 - Pipe joining equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joining apparatus and, more particularly, to an annular sealing member disposed between a port of one pipe and a port of another pipe inserted into the port. Of a pipe for a so-called mechanical type pipe joint, in which the pressure is compressed by a pressing ring bolted to the flange at the opening end of the receiving port.

[0002]

2. Description of the Related Art FIG. 6 shows the structure of such a known mechanical type pipe joint. Here, a receiving port 2 is formed at an end of one of the tubes 1 connected to each other, and an insertion port 4 inserted into the receiving port 2 is formed at an end of the other tube 3. A tapered sealing material pressure contact surface 5 is formed on the inner periphery of the opening end of the receiving port 2, and an inner peripheral surface 6 is formed on the inner side of the sealing material pressure contact surface 5. A flange 7 is formed on the outer periphery of the opening end of the receiving port 2.

[0003] The insertion opening 4 is inserted up to the inside of the inner peripheral surface 6, and an annular sealing material 8 is disposed between the press contact surface 5 of the receiving opening 2 and the outer peripheral surface of the insertion opening 4. A press ring 9 is fitted on the outer periphery of the insertion opening 4 at a position away from the receiving opening 2.
A plurality of T-head bolts 10 in the pipe axis direction passing through the flange 7 of the receiving port 2 and the pressing ring 9 are provided in the circumferential direction of the pipe, and the nut 11 is screwed to each T-head bolt 10 so that the pressing ring 9 is attached to the flange 7. Are joined. FIG. 7 is a view separately showing only the T-head bolt 10 and the nut 11, and 13 is the head of the bolt 10. FIG.
As shown in the figure, the pressing wheel 9 is formed in a polygonal shape corresponding to the number of T-head bolts 10. 12 is the bolt hole.

In this manner, the sealing material 8 is pressed by the pressing wheel 9, and the sealing material 8 is
A predetermined sealing function is exerted between the receiving port and the receiving port by being compressed with the outer peripheral surface of the receiving port. In a state where the sealing material 8 is compressed, the pressing ring 9 is located away from the flange 7 of the receiving port 2, and a gap 14 having a certain size or more is formed between the flange 7 and the pressing ring 9.

When joining such a pipe joint, the insertion hole 4 in which the sealing material 8 and the pressing ring 9 are fitted in advance is inserted into the inside of the receiving port 2, and the pressing ring 9 is connected to the bolt 10 and the nut 11. Then, the sealing material 8 is pressed between the press-contact surface 5 and the outer surface of the insertion opening 4 to be compressed.

Recently, a device has been proposed in which the pressing ring can be mounted on the receiving flange by mechanical force without manual operation. Hereinafter, this apparatus will be described in detail with reference to FIGS. As shown,
A frame 24 is formed by joining a first plate 21 along a cross-sectional direction of the tubes 1 and 3 to a second plate 23 by a cylinder device 22. Since the plates 21 and 23 are formed in a downward U-shape, the frame 24 can be disposed over the horizontal tubes 1 and 3 while being placed on the horizontal tubes 1 and 3 from above. is there.

The pipes 1 and 3 are thus connected to the frame 28.
Before the is disposed, the insertion hole 4 is inserted into the inside of the receiving hole 2, and the sealing material 8 and the polygonal pressing ring 9 are fitted in the insertion hole 4. Is in a state of being passed through a bolt hole of the flange 7 of the receiving port 2.

As described above, the first plate 21 is formed in a downward U-shape. The first plate 21 can be placed on the receiving port 2 from above so that the receiving port 2 of the tube 1 enters the cutout portion 25 thereof. Have been. The roller 27 at the end of the bracket 26 in the tube axis direction attached to the first plate 21
This first plate 21 is supported by the tube 1 by contacting the outer surface of the top of the tube.

The first plate 21 is passed through the flange 7 when the first plate 21 is guided by the rollers 27 and moved closer to the flange 7 while being supported by the tube 1. A bolt setter 28 capable of holding the head 13 of the T-head bolt 10 is provided corresponding to each T-head bolt 10.

The cylinder device 22 is installed at an appropriate position along the circumferential direction of the pipe 1. The bolt setter 28 is engaged with the head 13 of the T-head bolt 10 and the cylinder device 22.
Is shortened, so that the second plate 23 is
Is moved in the direction to approach.

The second plate 23 is also formed in a downward U-shape as described above, and is configured so that the insertion opening 4 of the tube 3 enters into the cutout portion 31 thereof. On this second plate 23, a crescent-shaped press wheel setter 32 is arranged which is arranged along the outer periphery of the substantially upper half of the tube 3. The press wheel setter 32 is arranged concentrically with the tubes 1 and 3, and is rotatable in the circumferential direction over a certain angle range. An arc-shaped rack 33 is provided in a certain range on the outer periphery of the press wheel setter 32. Also, the second plate 23
, A motor 34 is mounted. The pinion 35 driven by the motor 34 meshes with the rack 33, so that the press wheel setter 32 is driven to rotate in the circumferential direction.

The pressing ring setter 32 has a receiving recess 36 having a shape conforming to the outer shape of the polygonal pressing ring 9. The polygonal pressing wheel 9 is stationary at an arbitrary angle in the circumferential direction in a state where the pressing ring 9 is fitted in the pipe 3. Therefore, by rotating the press wheel setter 32 as described above, it is possible to make the angle of the accommodation recess 36 of the press wheel setter 32 coincide with the angle of the press wheel 9, whereby the press wheel 9 can be fitted into the recess 9.

A push wheel pusher 37 is provided for pushing the push wheel 9 into the accommodation recess 36. That is, the bushing corresponds to the hole 38 formed through the first plate 21.
39 is provided, and a bar 40 in the pipe axis direction is
39 is slidably guided. One end of bar 40 is a hole
It extends toward the second plate 23 through 38, and has a rectangular contact plate 41 that can contact the pressing ring 9 at its tip.
Is attached. A compression coil spring 42 is provided on the outer periphery of the bar 40 between the contact plate 41 and the bush 39, and presses the contact plate 41 so as to approach the second plate 23. A stopper 43 is provided on the other end of the bar 40, and when the stopper 43 contacts the bush 39, the maximum protrusion amount of the backing plate 41 from the first plate 21 is restricted.

The position of the bar 40 in the radial direction of the tube is set so as not to interfere with the receiving port 2 and the pressing wheel 9.
And so that the abutment plate 41 can press one and the other surface of the central portion along the vertical direction in the press wheel setter 32,
It is arranged at a pair of positions spaced apart by approximately 180 degrees along the circumferential direction of the tube 1 and at a position that does not interfere with the bolt 10 or the bolt setter 28.

When the pressing wheel 9 is pushed into the accommodation recess 36 by using the pressing wheel pusher 37, first, the first plate 21 and the second plate 23 are brought close to each other by the cylinder device 22, so that the contact plate 41 is moved. The side surface of the pressing wheel 9 is pressed by the force of the spring 42. When the press wheel setter 32 is rotated in this state, when the angle of the accommodation recess 36 of the press wheel setter 32 matches the angle of the press wheel 9, the press wheel 9 is
Is pushed into the accommodation recess 36 by the force of

Next, when the press wheel setter 32 is further rotated, the press wheel 9 pushed into the accommodation recess 36 also rotates, and the bolt hole 12 of the press wheel 9 is held by the bolt setter 28. It can be aligned with the T-head bolt 10. Then, the cylinder device 22 is operated again, and the spring 42
1st plate 21 and 2nd plate against the force of
23 and 23, the pressing wheel 9 approaches the flange 7 of the receiving port 2 accordingly. At this time, the sealing material 8
By being pressed by the pressing wheel 9, the pressing member 9 is pressed between the sealing material pressing surface 5 and the outer peripheral surface of the insertion opening 4. Also T-head bolt 10
Is passed through the bolt hole 12 of the pressing ring 9 and further projects from the pressing ring 9. Therefore, by screwing a nut onto this protruding portion, the operation of attaching the pressing ring 9 to the flange 7, that is, the operation of joining the joint portion is completed. Note that
41 is formed thinner than the gap 14 between the pressing ring 9 and the flange 7 when the pressing ring 9 is bolted to the flange 7 of the receiving port 2. Is not inhibited.

Finally, if the first and second plates 21 and 23 are lifted, they can be removed from the joint after the joining is completed.

[0018]

However, in such a conventional device, when the pressing wheel 9 is pushed into the pressing wheel setter 32, the pressing wheel 9 is positioned at a pair of positions spaced at substantially 180 degrees along the circumferential direction of the tube 1. Since the pressing ring 9 is only pressed by the contact plate 41 arranged only at the pressing position, it is difficult for the pushing force to act on the upper end side portion of the pressing ring 9, and this upper end side portion is the accommodation recess.
There is a problem that 36 may not be entered well.

Therefore, an object of the present invention is to solve such a problem and to make sure that the pressing wheel 9 can be securely fitted into the accommodation recess 36.

[0020]

In order to achieve the above object, the present invention is configured so that a press wheel setter is formed so as to fall on the upper half of the pipe by lowering from above, and a press wheel pusher is provided. At least one of the upper side surface and one of the central portions along the vertical direction and the other side surface of the push wheel to be pushed into the housing portion.

With such a structure, since the push wheel pusher can press at least the upper side surface of the push wheel and one and the other side surfaces of the central portion along the up-down direction, the push wheel has an upper end side. The part including the part is surely pushed into the accommodation part of the press wheel setter.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described.
1 to 3, the same members as those shown in FIGS. 4 to 8 are denoted by the same reference numerals, and will be described in detail.
Here, the accommodation recess 36 of the press wheel setter 32 is formed in a shape that matches the outer shape of the upper half of the polygonal press wheel 9 in the same manner as in FIG. Push wheel pusher 37
4, the bar 40 is also disposed at a pair of positions spaced apart by approximately 180 degrees along the circumferential direction of the tube 1 and at a position that does not interfere with the bolt 10 or the bolt setter 28. .

The contact plate 45 formed thinner than the gap 14
It is formed in a crescent shape along the upper half-circumferential portion of the pressing ring 9, and a bar is formed at each end along the circumferential direction.
Connected to 40. Further, the backing plate 45 is fixed to the bolt hole 12 so that the inner peripheral edge 46 does not engage the bolt hole 12 of the pressing wheel 9.
It is configured such that a portion of the press wheel 9 on the outer peripheral side than 12 can be pressed.

The pressing surface of the backing plate 45 against the pressing wheel 9 includes:
A rubber plate 47 is attached. The rubber plate 47 has a large number of irregularities formed on the side in contact with the pressing ring 9, and in the illustrated example, has a large number of small rectangular projections 48 having flat tips.
Such irregularities are formed.

According to such a configuration, since the contact plate 45 is formed in a crescent shape along the upper half circumferential portion of the pressing wheel 9, the bar 40 of the pressing wheel pusher 37 extends along the circumferential direction of the pipe 1. Despite being provided only at a pair of positions spaced at substantially 180 degrees, the entire upper half of the pressing wheel 9 can be pressed substantially uniformly. Therefore, the upper end portion of the pressing wheel 9 can also be securely fitted into the housing recess 36.

In the conventional construction shown in FIGS. 4 and 5, the pressing plate 41 is pressed against the side surface of the pressing wheel 9 by the force of the spring 42 as described above, in order to fit the pressing ring 9 into the housing recess 36. When the press wheel setter 32 is rotated, the press wheel 9 may rotate together with the press wheel setter 32, and may not be able to be securely inserted into the accommodation recess.

However, according to the present invention, since the rubber plate 47 having a large number of small projections 48 is attached to the surface of the backing plate 45 as described above, friction between the rubber plate 47 and the pressing ring 9 is increased to integrate the two. The pressing wheel 9 can be prevented from rotating together with the pressing wheel setter 32 before the fitting.

[0028]

As described above, according to the present invention, the press wheel setter is constructed so as to cover the upper half of the pipe by lowering from above, and the presser pusher is
In order to be able to press at least one of the upper side surface and the central portion along the vertical direction and the other side surface of the pressing wheel to be pushed into the housing portion of the pressing wheel setter, the pressing wheel is moved to the upper end portion. It can be securely pushed into the accommodation part of the press wheel setter.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of a pipe joining apparatus according to the present invention.

FIG. 2 is an overall side view of a press wheel setter in the apparatus.

FIG. 3 is a perspective view of a main part of a backing plate in the apparatus.

FIG. 4 is a front view of a main part of a conventional pipe joining apparatus.

FIG. 5 is an overall side view of a press wheel setter in the apparatus.

FIG. 6 is a cross-sectional view of a known pipe joint joined by a conventional pipe joining apparatus and a pipe joining apparatus according to the present invention.

FIG. 7 is a plan view of the T-head bolt in FIG. 6;

FIG. 8 is a side view of the pressing wheel in FIG. 6;

[Explanation of symbols]

 1 Pipe 2 Reception port 3 Tube 4 Insertion port 7 Flange 8 Seal material 9 Pressing ring 10 T-head bolt 12 Bolt hole 32 Pressing ring setter 37 Pressing ring pusher 45 Patch plate

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F16L 19/00-19/14 F16L 21/04 F16L 23/02-23/036 F16L 1/00-1 / 11

Claims (1)

(57) [Claims] In a pipe joint in a state in which an insertion port of one pipe in the horizontal direction is inserted into an insertion port of another pipe, an annular seal material disposed between the reception port insertion ports is formed by opening the reception port. Apparatus for compressing by a pressing wheel bolted to an end flange, means for holding a plurality of pipe axial bolts in a circumferential direction passed through the flange and a bolt hole of the pressing wheel, and accommodating the pressing wheel. The press wheel is rotated in this state so that the position of the bolt hole of the press wheel corresponds to the position of the bolt in the holding state, and the press wheel pusher for pushing the press wheel into the accommodation portion of the press wheel setter. The press wheel setter is configured to cover substantially the upper half circumference of the pipe by descending from above, and the press wheel pusher is provided on a press wheel which is to be pushed into a housing portion of the press wheel setter. A pipe joining device capable of pressing at least an upper side surface and one and the other side surfaces of a central portion along a vertical direction.