JP2829253B2 - Repair equipment for waste transport pipes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for repairing a worn portion of an inner wall of a transport pipe for refuse pneumatic transportation buried underground or the like.

[0002]

[Technical background] Today, in new towns and the like, garbage transport pipes are buried in the ground, etc., in order to improve the efficiency of garbage collection. Pneumatic transport systems have been developed and are in operation.

One problem with this refuse pneumatic transport system is that, over time, the interior surfaces of the refuse transport tube are worn away due to friction with the refuse. For this reason, as a means for repairing the abrasion point, Japanese Utility Model Laid-Open No. 49-49514 has been proposed.
Gazette, Japanese Utility Model Laid-Open No. Sho 62-62696,
There is one described in, for example, Japanese Patent 47702.

The most common repair technique is described in Japanese Patent Application Laid-Open No. 5-147702, and FIG.
As shown in FIG. 7, the garbage transport pipe A is composed of a cylindrical backing plate 1 applied to the entire inner peripheral surface of the inner wall worn portion of the refuse transport pipe A. The backing plate 1 is divided, and the divided pieces 1a and 1b are connected. At the same time, the pressing plate 1c is pushed into the divided portion, the diameter of the backing plate 1 is increased, and the pressing plate 1c is pressed against the inner surface of the transport pipe A and attached. Since this technique uses the cylindrical backing plate 1, it can be applied to any portion of the transport pipe A in the circumferential direction where the worn portion is located.

[0005]

In the technique described in FIGS. 6 and 7, the connection of the divided pieces 1a and 1b is performed by fitting, and this fitting is an on-site work in a narrow pipeline, so that it is extremely difficult. Is annoying. Further, the divided pieces 1a and 1b must be separated and transported to the site, and the transportation is troublesome.

Further, since the diameter of the backing plate 1 is increased by pressing the holding plate 1c, only the press-fitting width of the holding plate 1c is increased, and the expanding width cannot be adjusted. Therefore, it is not possible to sufficiently cope with the deformation (expansion of the diameter) of the transport pipe A, and the patch plate 1 is not firmly attached to the inner surface of the transport pipe A. As a result, the repair function may not be fulfilled.

[0007] This invention is a repair device consisting of lower, said cylindrical backing plate of the above circumstances, as well as facilitate its portability, challenge to make it be made sufficiently enlarged caul plate And

[0008]

In order to solve the above problems SUMMARY OF THE INVENTION, this invention, Ri Do a cylindrical abutting plate against cracking over the inner peripheral surface entire circumference of the inner wall wear portion of the dust transport pipe, as those <br/> Te plate, the divided pieces which are divided in the circumferential direction of the third position or more is obtained by linked to bend with a pin except at least one plant, not the pin connection In the division,
This is a device for repairing garbage transport pipes provided with a means for expanding the patch plate.
Te, diameter means the caul is above one split piece end
Form a notch in the circumferential direction and make the end a two-pronged piece.
Move in the above-mentioned circumferential direction into the notch at one end
Form a protruding piece that can be
The two ends of this bolt
Protrude through in the width direction, screw in the nut and tighten
It is, both outer end surfaces of the bifurcated pieces, to the other divided piece
Opposite to the center in the width direction, and
Also, the through hole of the bolt of the piece is a long hole long in the circumferential direction.
This is the configuration.

[0009]

[0010]

According to the present invention constructed as described above, since the cylindrical backing plate is divided into three or more tertiles, the divided pieces can be folded inward by the pin hinge portions to reduce the bulk (FIG. 4). Ref.), And transport it in the folded state to the repair site of the waste transport pipe. At the site, the divided pieces are spread to form a cylindrical backing plate, and the ends of the divided pieces are fitted together. That is, the protruding piece is fitted to the forked piece, the bolt is made to penetrate both, and a nut is screwed into the bolt and tightened.

At the time of this tightening, since the outer end surface of the fork is inclined, the head of the bolt and the nut slide in the inclined surface as the bolt is tightened, and the nut and the nut are inserted into the through holes in the fork. To move. The movement of the bolt is such that the split piece on the protruding side is separated from the split piece on the two-pronged side, so that the abutment plate expands in diameter, and is firmly pressed against and attached to the inner surface of the refuse transport pipe.

[0012]

FIG. 1 to FIG. 4 show an embodiment, in which a backing plate 11 of this embodiment has four divided pieces 11a, 11b, 11c,
11d. The number of divisions and the division angle θ of each piece 11a are appropriately determined in consideration of the degree of folding, workability, and the like, which will be described later. However, the number of divisions is three or more. If it is divided into two, as shown in FIG. 4, each piece cannot be folded inward, the bulk does not become small, and it is difficult to handle.

Each of the split pieces 11a is made of a wear-resistant cast iron such as bainite or high chromium, but only the split pieces in contact with the abraded portion, for example, 11a are made of those wear-resistant cast irons, and the other split pieces 11b are used. , 11c, 11d may be gray cast iron, cast steel or the like. Also, as shown in FIG. 1, the divided pieces 11b that are not in contact with the abraded portion (hard to be worn out)
A concave portion 12 is formed on the surface to reduce the weight.

At least one portion of the connection of the divided pieces 11a has the structure shown in FIG. 2, and the others have the structure shown in FIG. Figure 3
Is structured such that the ends of the opposing split pieces 11c, 11b,... Are fitted with the concave and convex shapes 13a, 13b, and the bolt 14 penetrates one convex piece 13a and the other convex piece 13a.
By screwing it into b, the two divided pieces are foldably connected. The screwing of the bolt 14 is relatively easy even at the site inside the transport pipe A because it is simply screwed.

In the structure shown in FIG. 2, the opposite end of one of the divided pieces 11c has a notch 15 in its circumferential direction,
A rectangular protruding piece 16 is formed at the opposite end of the other divided piece 11d so as to fit into the notch 15. The bifurcated piece 15a has an outer end face whose other end piece 11
The inclined surface 17 approaches the center in the width direction toward d, and a through hole 18 in the width direction is formed from the inclined surface 17. The through hole 18 is a long hole that is long in the length direction (circumferential direction) of the divided piece. This length is appropriately selected in consideration of the degree of tightening described later.

On the other hand, a through-hole 19 in the width direction is also formed in the protruding piece 16, and a nut 20 is screwed into the through-hole 19 and the through-hole 18 through a washer 21. As the nut 22 is screwed in, the nut 22 and the head 20a of the bolt 20 descend on the inclined surface 17 (slip), and due to the slip, the other split piece 11d is separated from the one split piece 11c, and the backing plate 11 is expanded. It is attached by being pressed against the inner surface of the transport pipe A. The washer 21 moves by fitting into the opening of the through hole 18 by the protrusion 21a, but does not necessarily need to be interposed. However, with the interposition, the tightening of the nut 22 and the movement on the inclined surface 17 are smooth.

This embodiment has the above configuration. For example,
As shown in FIG. 4A, the bolt 20 of the portion of the diameter expanding means B composed of the bifurcated piece 15a or the like is removed, and each of the divided pieces 11a is folded and transported to the site. At this time, since the volume is small, it is easy to carry.

At the site, as shown in FIG.
are spread to form a cylindrical backing plate 11. After the backing plate 11 is applied to the inner surface of the refuse transport pipe A so as to cover the abraded portion, a nut 22 is screwed into a bolt 20 and tightened to expand the diameter of the backing plate 11. And attach it. At this time, as shown by the chain line in FIG. 5, the contact rods 23a, 23a are screwed into the rotary cylinder 23b with reverse screws,
By rotating the rotary cylinder 23b, the contact rods 23a, 23a
With the tensioning member 23 such that the elastic
Holding 1 makes the work easier.

In the embodiment shown in FIG.
It is configured into two divided parts. In this case, FIG.
As shown in FIG.
1c is preferably removed and carried. This is because the bifurcated piece 15a or the protruding piece 16 projects and is hard to fold. By the way,
In FIG. 4a, it is also possible to remove one piece and carry it.

[0020]

The present invention is constructed as described above and can be folded, so that it is easy to carry. For this reason, it is advantageous for transportation into a transport pipe that is a narrow work site.

Also, by tightening the bolts and nuts,
Since the diameter of the patch to cover the abraded part is increased, the diameter of the patch can be adjusted widely, and the diameter of the patch can be expanded according to the deformation of the transport pipe. Can be securely attached to pipes.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment of a refuse transport pipe repair apparatus of the present invention.

FIG. 2 is an enlarged view of a main part of the embodiment, where “a” is a plan view and “b”
Is a side view

FIG. 3 is an enlarged plan view of a main part of the embodiment.

FIG. 4 is a diagram illustrating folding of each embodiment.

FIG. 5 is a front view of another embodiment.

FIG. 6 is a perspective view of a conventional example.

FIG. 7 is a front view of an installation state of the conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1, 11 Cylindrical backing plate 1a, 1b, 11a, 11b, 11c, 11d Backing plate divided piece 1c Holding plate 12 Depression 13a, 13b Fitting convex part 14 Bolt 15 Notch 15a Forked piece 16 Protrusion piece 17 Slope 18 Bifurcated one-sided through hole 19 Projected one-sided through hole 20 Bolt 21 Washer 22 Nut 23 Tensioner A Waste transport pipe B Large diameter means

Claims (1)

(57) [Claims] 1. A cylindrical backing plate 11 that is applied over the entire inner peripheral surface of the inner wall abrasion portion of the refuse transport pipe A, and the backing plate 11 is divided into three or more tertiles in the circumferential direction. The divided pieces 11a, 11b, 11c and 11d are connected to each other so as to bendable with a pin 14 except for at least one portion. a repair device of Tago only transport tube provided,
The diameter expanding means B of the backing plate 11 is provided at one end of the divided piece 11c.
The above-mentioned circumferential notch 15 is formed in the
Also, the pieces 15a and 15a are provided at the end of the other divided piece 11d.
Is a projecting piece 1 movable in the circumferential direction in the notch 15.
6 are formed, and the protrusion 16 is provided with a bolt in the width direction of the divided piece 11d.
Bolt 20 is passed through, and both ends of the bolt 20 are
Also, the pieces 15a, 15a penetrate in the width direction and protrude, and
The two outer end faces of the forked pieces 15a, 15a are separated from each other by a screw.
The inclined surface 17 approaching the center in the width direction toward the piece 11d
And the bolt 20 of the bifurcated pieces 15a, 15a
The through hole 18 was configured to be a long hole long in the circumferential direction.
A device for repairing garbage transport pipes.