JPH0442639Y2 - - Google Patents

Description

[Detailed explanation of the idea] Industrial applications The present invention relates to a repair plate for air transport pipes.

Conventional technology Existing pneumatic transport pipes such as garbage transport pipes are
Steel pipe is used as the material. However, due to various factors, existing pneumatic pipelines are experiencing more wear than initially expected. Particularly in pipelines where ordinary steel pipes are used, wear occurs not only in curved pipes but also in straight pipes. In some cases, the worn part penetrated through.

In order to repair this worn part, conventionally, for example, in Japanese Patent Application No. 12445/1983, a plurality of repair plates formed in the shape of a gutter according to the inner surface of the air transport pipe are connected to each other so as to be flexible. After the repair plate is carried into the pipeline, it is moved toward the worn area and installed. The structure of the connecting portion between the repair plates is such that brackets are attached to both edges of both ends of the repair plate, and the brackets of adjacent repair plates are connected to each other with bolts.

Problems to be Solved by the Invention However, in such a conventional configuration, brackets must be provided at both edges of the repair plate, that is, at four locations per repair plate, which makes the structure of the repair plate difficult. There are problems in that it is complicated and its manufacturability is poor. Another problem is that the brackets and bolts act as resistance to the air transport pipe after they are installed in a predetermined worn area.

Therefore, the present invention aims to solve these problems and provide a repair plate that has a simple structure and is less likely to cause resistance to the pipeline.

Means for Solving the Problems In order to solve the above-mentioned problems, the repair plate for pneumatic transport pipes of the present invention is formed in the shape of a gutter along the inner surface of the pneumatic transport pipe, and is installed at a distance from the end face. A notch is formed that opens toward the side edge, and a protrusion that protrudes from the bottom of the notch toward the side edge is formed on the end face side of the notch, and extends between the notches of adjacent repair plates. The U-shaped clamps are fitted together, and the distance between the hooks of the clamps that engage the notches of adjacent repair plates is larger than the sum of the widths of both protrusions, and the protrusions The liner is configured to be freely inserted into the gap or the gap created between the hook and the protrusion.

Effect With this type of construction, adjacent repair plates are connected to each other by the clamp, so it is possible to move multiple repair plates toward a predetermined position in the pipe while maintaining this connection state. can. Please note that when moving the repair plate, do not drive in the liner.
By configuring this connection part loosely,
The repair plate can be easily moved within the air transport pipe. Further, since notches are formed in adjacent repair plates and the clamps are simply fitted into both the notches, the structure is simple. Furthermore, since the clamp is fitted into the notch, it is prevented from protruding largely from the inner surface of the repair plate, and does not become a resistance to the flow within the pipe.

Embodiment In FIG. 3, reference numeral 1 denotes an air transport pipeline, which is formed of a steel pipe and is buried underground. 2 is its straight pipe portion, and 3 is its curved pipe portion.

1 and 2 show in detail one embodiment of the repair plate 4 according to the present invention. This repair board 4
is formed of a gutter-shaped cast iron plate along the inner surface of the pipe line 1, and is formed in the shape of a tube piece having an appropriate length in the axial direction of the pipe line 1. A pair of notches 6 that open toward both side edges 5 of the repair plate 4 are formed in adjacent repair plates 4 at positions spaced apart from the end surfaces of the repair plate 4. Also,
A protrusion 8 that protrudes from the bottom 7 of the notch 6 toward the side edge 5 is formed on the end surface side of the notch 6 .

A U-shaped clamp 9 is fitted between the notches 6 of adjacent repair plates 4. This clamp 9 is formed to have the same thickness as the repair plate 4,
A pair of hook portions 10 adjacent to both notches 6 and a connecting portion 11 that connects both hook portions 10 are integrally formed. The connecting portion 11 is disposed straddling both protrusions 8 and has an outer surface 12
is formed so as to be substantially flush with the side edge 5 of the repair plate 4.

As shown in FIG. 2, the distance between the two hook parts 10 in the clamp 9 is formed to be larger than the sum of the width dimensions of both the protruding parts 8. As a result, gaps 13 and 14 are created between the protruding parts 8 or between the hook part 10 and the protruding part 8 as shown in the figure, and the liner 15 is inserted into these gaps 13 and 14 at a predetermined laying position. Driven. Further, the width of the notch 6 is formed to be larger than the width of the hook portion 10, and the structure is such that a gap 16 is also generated between the notches 6 and 10.

As mentioned above, the length of the repair plate 4 can be set as appropriate depending on the condition of the air transport pipe 1 in which it is to be laid, and the length of the repair plate 4 can be set as appropriate depending on the condition of the air transport pipe 1 in which it is to be laid. It is also possible to use

Next, a method of installing the repair plate 4 having such a configuration will be explained. First, as shown in FIG. 3, an inspection port 17 leading from the ground 24 to the air transport pipeline 1 is opened, and a plurality of repair plates 4 are carried into the pipeline 1 using this inspection port 17. Also, when a worker enters the pipe line 1 and clamps 9 as shown in FIGS. 1 and 2,
The respective repair plates 4 are connected to each other using. On the other hand, after fixing the support jack 18 on the back side of the predetermined installation position in the conduit 1, and hooking the wire 20 from the winch 19 installed on the ground 24 to the pulley 21 attached to the support jack 18, , is connected to the repair plate 4 on the tip side.

When the winch is driven in this state, the plurality of connected repair plates 4 are pulled by the wire 20 and moved toward a predetermined installation position. At this time, the liner 15 is not yet driven into the gaps 13 and 14 of the connecting part,
By configuring this connection part loosely,
The repair plate 4 can be easily moved within the air transport pipe 1, and can be freely bent even in a bent pipe section.

At the predetermined installation position, a liner 15 is driven into the connecting portion, and adjacent repair plates 4 are firmly joined together using clamps 9. At this time, air transport pipe 1
In the straight pipe section 2, as shown by imaginary lines in FIG.
Drive the liner 15 into the gap 14 between the protrusion 8 and the
The end surfaces of adjacent repair plates 4 are brought into close contact with each other.

In addition, in the bent pipe section 3 of the air transport pipe line 1,
As shown in FIGS. 2 and 4, this bent pipe section 3
A liner 15 is driven into the gap 13 between both repair plates 4 on the side corresponding to the outside of the radius, and a liner 15 is driven between the hook part 10 and the protruding part 8 on the side corresponding to the inside of the radius as described above. It's crowded. By doing this, the end surfaces of adjacent repair plates 4 come into contact with each other on the inside of the radius in the curved tube section 3, and these end surfaces gradually separate from each other as they move toward the outside of the radius, so that the curved tube section 3 It becomes possible to lay the repair board 4 in a state where it is bent to match. In FIG. 4, θ indicates the bending angle between both repair plates 4. Further, as shown in FIG. 4, a retracting metal fitting 23 having a hook portion 22 that engages with the notch 6 of the leading repair plate 4 is connected to this repair plate, and a wire 20 is connected to this retracting metal fitting 23. You can also.

In this way, according to the present invention, adjacent repair plates 4
Since the parts are simply connected by the clamps 9, the structure of the connecting part can be made simple. In addition, since the clamp 9 is fitted into the notch 6 of the repair plate 4, it does not protrude inward much more than the repair plate 4, and does not create resistance to the flow within the conduit 1. . Note that, as in this embodiment, the thickness of the clamp 9 is made to be approximately the same as the thickness of the repair plate 4, and the outer surface 12 of the clamp 9 is made similar to the thickness of the repair plate 4.
It is particularly useful to make it substantially flush with the side edge 5 of the pipe from the viewpoint of preventing flow resistance.

Effects of the Invention As described above, according to the present invention, the structure of the connecting portion between the repair plates can be simplified, and this connecting portion can be prevented from becoming a flow resistance in the pipe. Furthermore, since the distance between the two hooks of the clamp that engages both notches of adjacent repair plates is larger than the sum of the width dimensions of both protruding parts, when laying the repair plate, In addition, by not driving the liner into the gap created between the protrusions or between the hook part and the protrusion, and by configuring this connection part loosely, the repair plate can be easily moved within the air transport pipe. The pipe can be bent freely at the bent pipe section, allowing efficient laying work.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an embodiment of the present invention, Fig. 2 is an enlarged view of its main parts, Fig. 3 is a front view showing the laying and towing method, and Fig. 4 is a plan view of the main parts in Fig. 3. It is. 1... Air transport pipe, 4, 4a... Repair plate, 6
...notch, 9...clamp.

Claims (1)

[Scope of utility model registration request] A repair plate that is attached inside the air transport pipe in the axial direction of the air transport pipe, and is formed in a gutter shape along the inner surface of the air transport pipe, and is located at a distance from the end face. A notch is formed that opens toward the side edge, and a protrusion that protrudes from the bottom of the notch toward the side edge is formed on the end face side of the notch, and a protrusion that protrudes toward the side edge side of the bottom of the notch is formed between the notches of adjacent repair plates. The U-shaped clamps are fitted together, and the distance between the hooks of the clamps that engage the notches of adjacent repair plates is larger than the sum of the widths of both protrusions. A repair plate for an air transport pipe, characterized in that a liner can be freely inserted into a gap created between parts or between a hook part and a protruding part.