JPH08270882A - Repairing device for refuse transport pipe - Google Patents

Abstract

PURPOSE: To facilitate the transport of patching plate for repair, and sufficiently expand a diameter with proper workability. CONSTITUTION: A cylindrical patching plate 11 is patched on the worn part of a refuse transport pipe A. The plate 11 is quartered to provide a diameter- expanding means B on one place of divided parts, and the other places are connected by pins 14 to make respective divided pieces 11a, 11b, 11c, and 11d foldable and thereby are foldedly transported to a site. In the means B, a projection piece 16 is inserted into a forked piece 15a, and a bolt 20 is penetrated into both the forked piece 15a and the projection piece 16. The outer side end surface of the forked piece 15a is adopted as a tilted surface 17, and when the bolt 20 is fastened, a washer 21, together with a bolt 18, moves on the surface 17 to separate the projection piece 16 to the forked piece 15a. That is, the washer 21 is moved in a direction, where the divided piece 11d recedes to the divided piece 11c, to diameter-expand the plate 11.

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 transportation pipe buried in the ground or the like for pneumatic transportation of dust.

[0002]

[Technical background] Today, in new towns, etc., in order to improve the efficiency of waste collection, etc., a waste transportation pipe is buried in the ground, etc., and with this transportation pipe, the waste produced by each household etc. A pneumatic transport system has been developed and is in operation.

One problem with this waste pneumatic transportation system is that over time, the waste transportation tube wears its inner surface due to friction with the waste. For this reason, as a means for repairing the worn-out portion, it is necessary to use
Japanese Unexamined Patent Publication No. 60-62696, Japanese Unexamined Patent Publication No. 5-1.
There is one described in Japanese Patent No. 47702 and the like.

Of these, the most general repair technique is described in Japanese Patent Laid-Open No. 147702/1993, and FIG.
As shown in FIG. 7, a cylindrical patch plate 1 is applied to the entire inner peripheral surface of the inner wall wear portion of the waste transport pipe A. The patch plate 1 is divided and the divided pieces 1a and 1b are connected. At the same time, the pressing plate 1c is pushed in at one divided portion, the contact plate 1 is expanded in diameter, and is pressed against the inner surface of the transport pipe A to be attached. Since this technique uses the cylindrical contact plate 1, it can be applied regardless of where the wear portion is in the circumferential direction of the transport pipe A.

[0005]

In the technique shown in FIGS. 6 and 7, the divided pieces 1a and 1b are connected by fitting, and this fitting is an on-site work in a narrow pipeline, and therefore is extremely difficult. It is annoying. In addition, the divided pieces 1a and 1b need to be separated and carried to the site, which is troublesome to carry.

Further, since the pressing plate 1c is pushed in to expand the diameter of the contact plate 1, only the press-fitting width of the pressing plate 1c is expanded, and the expansion width cannot be adjusted. For this reason, the deformation (diameter expansion) of the transport pipe A cannot be sufficiently coped with, the pad plate 1 cannot be firmly attached to the inner surface of the transport pipe A, and the dust plate moves to move the pad plate 1 to expose the wear point. As a result, there was a case where the repair function was not fulfilled.

Under the above circumstances, the first object of the present invention is to make it easy to carry the repair device comprising the above-mentioned cylindrical backing plate, and it is possible to sufficiently expand the backing plate diameter. The second task is to

[0008]

In order to solve the first problem, the invention according to claim 1 is a cylindrical pad applied over the entire inner peripheral surface of the inner wall wear portion of the waste transport pipe. In the above-mentioned repair device consisting of a plate, the above-mentioned patch plate is obtained by connecting the divided pieces divided in the tertile or more in the circumferential direction so as to be bendable with a pin except at least one place, The dividing portion which is not connected to the pin is provided with a diameter increasing means of the contact plate.

In order to solve the second problem, the invention according to a second aspect is the repair device for a refuse transportation pipe according to the first aspect, wherein the expanding means of the contact plate has the above-mentioned one end of one divided piece. Form a notch in the circumferential direction and make the end part a bifurcated piece,
A projecting piece movable in the circumferential direction is formed in the notch at the other end of the split piece, and a bolt in the width direction of the split piece is passed through the projecting piece. The piece is projected through the width direction thereof, is tightened by screwing a nut, and both outer end surfaces of the bifurcated piece are inclined surfaces toward the other divided piece and approach the center in the width direction, and,
The through hole of the bolt of the bifurcated piece is configured to be a long hole that is long in the circumferential direction.

[0010]

According to the present invention thus constructed, since the cylindrical backing plate is divided into tertiles or more, the division can be folded inward by the pin hinge portion to reduce the bulk (FIG. 4). In this folded state, carry it to the repair location of the waste transport pipe. At the site, the divided pieces are spread out to form a cylindrical pad, and the abutting edges of the divided pieces are fitted together. That is, the projecting piece is fitted to the bifurcated piece, the bolt is penetrated through both, and the nut is screwed into the bolt and tightened.

At the time of this tightening, since the outer end surface of the bifurcated piece is an inclined surface, as the bolt is tightened, the head of the bolt and the nut slide in the inclined surface and inside the through hole in the bifurcated piece. To move. This bolt moves in such a direction that the split piece on the projecting piece side separates from the split piece on the bifurcated side, so that the diameter of the contact plate is increased, and the bolt is firmly pressed against the inner surface of the dust transport pipe to be mounted.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment is shown in FIGS. 1 to 4, and a backing plate 11 of this embodiment has four divided pieces 11a, 11b, 11c,
It consists of 11d. The number of divisions and the division angle θ of each piece 11a are appropriately determined in consideration of the folding degree, workability, and the like described later. However, the number of divisions is 3 or more. This is because, if it is divided into two, each piece cannot be folded inward as shown in FIG. 4, the bulk is not reduced, and it is difficult to handle.

Each of the divided pieces 11a is made of wear-resistant cast iron of bainite type, high chromium type, or the like. However, only the divided pieces in contact with the wear portion, for example, 11a are made of the wear-resistant cast iron and the other divided pieces 11b are used. , 11c, 11d may be gray cast iron, cast steel, or the like. Moreover, as shown in FIG. 1, the divided pieces 11b ...
The recess 12 is formed on the surface of the structure to reduce the weight.

The connection of the divided pieces 11a ... At least one portion has the structure shown in FIG. 2, and the other portions have the structure shown in FIG. Figure 3
In this structure, the end portions of the divided pieces 11c, 11b, ..., Which face each other are fitted with the concavo-convex shapes 13a and 13b, and the bolt 14 penetrates one convex piece 13a and the other convex piece 13a.
By screwing into b, both split pieces are foldably connected. The screwing of the bolt 14 is relatively easy even at the site in the transport pipe A because it is simply screwed.

In the structure shown in FIG. 2, the opposing end of one of the divided pieces 11c has a notch 15 in the circumferential direction thereof to form a forked piece 15a,
15a is formed, and a rectangular protruding piece 16 that fits into the notch 15 is formed at the opposite end of the other divided piece 11d. The bifurcated piece 15a has an outer end surface that is the other divided piece 11a.
The inclined surface 17 faces 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 projecting piece 16, and a bolt 20 is inserted into the through hole 19 and the through hole 18 with a washer 21 interposed therebetween and a nut 22 is screwed. As the nut 22 is screwed in, the nut 22 and the head 20a of the bolt 20 descend (slide) on the inclined surface 17, and due to this slip, the one divided piece 11c separates from the other divided piece 11c and the contact plate 11 expands. It is attached to the inner surface of the transport pipe A with a diameter. The washer 21 fits into the opening of the through hole 18 by its projection 21a and moves, but it need not necessarily be present. However, the interposition facilitates the tightening of the nut 22 and the movement on the inclined surface 17.

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

At the site, as shown in FIG.
a is expanded to form a cylindrical contact plate 11, and after applying the contact plate 11 to the inner surface of the dust transport pipe A so as to cover the wear portion, the nut 22 is screwed into the bolt 20 and tightened to expand the diameter of the contact plate 11. To install. At this time, as shown by the chain line in FIG. 5, the abutment 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 tool 23 for expanding and contracting, the cylindrical pad 1
Holding 1 makes the work easier.

In the embodiment shown in FIG. 5, the diameter expanding means B is
It is composed of two divisions. In this case, FIG.
As shown in FIG. 1, the split piece 1 having the diameter expanding means B provided at both ends thereof.
1c is preferably removed and carried. This is because the bifurcated piece 15a or the protruding piece 16 protrudes and is difficult to fold. By the way,
Also in FIG. 4a, one piece can be removed and carried.

[0020]

Since the present invention is constructed as described above and can be folded, it is easy to carry. Therefore, it is advantageous for transportation into a transportation pipe which is a narrow work site.

By tightening the bolts and nuts,
Since the contact plate covering the wear-out part is expanded in diameter and attached, the expansion adjustment can be done widely, and the contact plate can be expanded according to the deformation of the transport pipe, and the contact plate can be transported. Can be securely attached to the pipe.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a repair device for a refuse transportation pipe according to the present invention.

FIG. 2 is an enlarged view of a main part of the embodiment, in which a is a plan view and b
Is a side view

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

FIG. 4 is an illustration of 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 a mounting state of the conventional example.

[Explanation of symbols]

1, 11 Cylindrical patch plate 1a, 1b, 11a, 11b, 11c, 11d Patch plate split piece 1c Holding plate 12 Recessed part 13a, 13b Fitting convex part 14 Bolt 15 Notch 15a Two-pronged piece 16 Projection piece 17 Inclined surface 18 Bifurcated one-sided through hole 19 Projected one-sided through hole 20 Bolt 21 Washer 22 Nut 23 Tension tool A Garbage transport pipe B Expanding means

Claims (2)

[Claims] 1. A dust collecting pipe (11) is composed of a cylindrical contact plate (11) which is applied over the entire inner peripheral surface of an inner wall wear portion of the waste transport pipe (A), and the contact plate (11) is divided into tertiles or more in the circumferential direction. The split pieces 11a, 11b, 11c, 11d are foldably connected by a pin 14 except at least at one place. Garbage transport pipe repair device characterized by being provided with. 2. The expanding means B of the contact plate 11 has the notch 15 in the circumferential direction formed at an end of one of the divided pieces 11c, and the end is made into a forked piece 15a, 15a, and the other end is formed. A projecting piece 16 movable in the circumferential direction is formed in the notch 15 at the end of the split piece 11d.
The bolt 20 in the 1d width direction is penetrated, and both ends of the bolt 20 are penetrated and protruded in the width direction of the bifurcated pieces 15a, 15a, and the nut 22 is screwed and tightened. Both outer end surfaces of 15a are inclined surfaces 17 that approach the center in the width direction toward the other divided piece 11d.
The repair device for a refuse transportation pipe according to claim 1, wherein the through hole 18 of the bolt 20 of the forked pieces 15a, 15a is an elongated hole elongated in the circumferential direction.