JPS6013102A - Resin exterior method and apparatus of constructed cable - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method and apparatus for applying a rust-proofing and corrosion-proofing sheath with a resin to the surface of an installed cable that has been assembled, bundled, shaped, etc.

(b) Conventional technology and its problems Conventionally, the rust and corrosion prevention treatments for the installed main cables and hanger ropes of suspension bridges, cable-stayed bridges, etc. have been carried out by applying paint, etc., and by using corrosion-resistant pipes such as aluminum. Two methods have been used to cover cables in a watertight manner, but each has advantages and disadvantages in terms of construction and effectiveness.

In other words, coatings such as paint are widely used.

Although it is possible to apply coating evenly and easily without special installation even on complex cable structures, the rust and corrosion prevention effect lasts only for a short period of time, so periodic repainting is required. However, Glti has the disadvantage of high maintenance and management costs.

On the other hand, the method of using corrosion-resistant pipes can provide corrosion protection and extend the service life, but it is difficult to completely cover the complex parts of the cable structure, and the construction cost is high due to the materials used. arrive.

(c) Means for Solving the Problems The present invention has been made in view of the current state of the art, and provides a highly reliable anti-rust/corrosion layer.

Moreover, the purpose is to easily and completely cover even a part with a complex structure, such as a collection of cables.

The resin cladding method of the present invention, which is one of the objectives, has the following objectives:
A removable resin sheathing device is attached to the outer periphery of the installed cable that has undergone work such as convergence and shaping, and this device heats and melts the raw resin that is sequentially supplied, and also controls the temperature of the molten resin. It is characterized by extruded coating on the outer circumference of the cable.

In other words, synthetic resins such as epoxy, polyethylene, polyvinyl chloride, polypropylene, polyurethane, and coal tar epoxy generally have extremely stable chemical properties and have excellent properties in preventing corrosion and rusting of metal structural materials. It is well known to show that

Therefore, if the cable surface can be coated with this type of resin, highly reliable rust and corrosion prevention effects can be obtained.

However, applying resin sheathing to the many strands and wires of an overhead cable at the production stage will result in damage to the resin coating during installation, inconvenience in handling, increased cable diameter, and damage to the cable bare wire. Various inconvenient problems such as the effect of compression and frictional force occur, reducing the practicality of the method. In other words, it prevents the cable from rusting.

For corrosion protection, it can be said that it is most rational and practical to coat the outer periphery of the cable with resin after installation.

Although many methods are known for forming a resin film on the surface of a metal structural material, in order to obtain a highly reliable film, resin powder is dispersed in a solvent solution and applied. So-called paint coatings are insufficient.

Therefore, as a result of testing the reliability of the durability, rust prevention, and anticorrosion effects of resin coatings formed by various methods, the present inventors selected a resin with strong adhesion to metals, and We discovered that the best method is to heat-fuse the coating layer to coat the surface of the cable, and then apply external force to firmly adhere the coating layer to the cable, etc., which led us to propose the above method. .

The resin coating produced by this method exhibits remarkable antirust and anticorrosion effects, and does not cause similar abnormalities even after 5,000 hours of continuous salt water spraying.

In addition, even if an unexpected situation occurs after construction and the coating is scratched, as long as the scratch does not reach the surface of the steel material, the above-mentioned effect will not be reduced. Only rust can be stopped. Note that this effect largely depends on the properties of the resin, that is, the adhesion to the steel material. Therefore, in order to prevent the progression of corrosion, it is important to avoid making mistakes in the selection of the resin. be.

Next, the device will be explained.

The resin sheathing device of the present invention comprises a cylindrical main body divided into at least two vertically, which is removably attached to the outer periphery of the construction cape that has undergone work such as assembly, convergence, shaping, etc. A pair of guide rollers, a feeding device for the raw resin provided at one end of the main body, a heat source for heating and melting the raw resin in the vicinity thereof, and a split jacket with good resin releasability provided on the inner surface of the main body. This configuration allows the above-described method to be carried out with good workability. By replacing some of the component parts, this device can be installed, for example, the main cable 1 of a suspension bridge or the bunker rope 2 shown in FIG.
In addition to the linear part (for example, part a in the figure), resin coating can also be applied to part b, where the main cable and hanger rope are assembled, making it possible to perform anti-rust and anti-corrosion treatment for the entire installed cable constituting a suspension bridge, etc.

(d) Examples An example of the resin packaging device of the present invention is shown in FIG. 2.

The illustrated exterior device 10 includes a cylindrical main body 11 vertically divided into a plurality of parts, a plurality of sets of guide rollers 12, for example, 4 to 8 glues, provided at both ends thereof, and a raw resin roller provided at one end of the main body. A feeding device 13, a heat source 14 such as a heater or an electromagnetic heater that heats and melts the resin in the vicinity of the feeding device, and a jacket 15 that is vertically divided into a plurality of pieces and attached inside the main body like the main body.
, a molten resin temperature sensor 16 embedded in this jacket, and a temperature control device (not shown) that controls the heat generation capacity of the heat source based on the temperature detected by the sensor.

The reason why the main body 11 and the jacket are vertically divided into multiple parts is to enable the device 10 to be attached to and removed from the cable A.The main body parts that have been divided into one part are arranged around the outer circumference of the cable, and they are connected with bolts or a so-called one-touch type. By coupling the sheathing device 10 to the guide roller 1 using a clamping device or the like,
2 and attach it to the outer circumference of the cable.

Further, the jacket 15 is provided for the purpose of preventing the molten resin from adhering to the main body, and is made of a material such as Teflon that has good peelability from the resin. The tip M1 of this jacket in the direction of movement of the device shown by the arrow is in close contact with the outer periphery of the cable, and the rear part remaining behind this part is large enough to create a predetermined gap between it and the outer periphery of cable A. Sade.

The gap becomes a passage for the fluid resin, and an extruded resin coating B is formed on the outer periphery of the cable.

That is, when raw resin is supplied to the supply port 17 of the main body by an appropriate method such as pneumatic transportation, the resin is sent into the interior of the main body by the feeding device 13.

The resin that has entered the main body of 2 is heated to a temperature higher than the melting point by the heat source 14 and melted, and the temperature is further maintained at a set temperature by the sensor 16 and the temperature control device, and the resin is pumped inside the jacket. Closely attached to the outer periphery.

Next, when the device 10 is gradually advanced in the direction of the arrow, the molten resin that has moved away from the heat source is cooled and solidified by heat conduction to the cable body, and is solidified to the extent that no deformation occurs due to contact with the guide roller. At this point, extract the material from the outlet of the device 10 to the rear. Therefore, if the above-mentioned operations are performed continuously, the straight portion of the installed cable can be covered with the extruded resin coating B.

Incidentally, it is not necessarily the case that the jacket 15 is fixed to the main body 11 in a non-removable manner, but it is preferable that the jacket 15 be detachably attached to the main body 11 in several cases, and the inner diameter of the resin passage can be changed by replacing the jacket. , it is possible to partially change the thickness of the resin coating using the same device body [C].

It is sufficient that the main body 11 and jacket 15 are divided into two or four parts. By replacing the main body member 11' and jacket member 15' having branch holes 11'a and 15'a communicating with each other with the members shown in FIG. 2, the hanger rope 2 can be removed.
It is possible to cover the joints, collection, and convergence parts with resin.

In this case, when it is confirmed by the temperature sensor that the rod 1 fat has been heated to a predetermined temperature, the heating is stopped and the coating B is obtained which is cooled and solidified by heat transfer to the cable. This work is of course performed with the device fixed in place. After that, the main body member 1
11 and jacket member 15' are disassembled and removed, and the remaining device is moved a little (to the front of the hanger rope).

Furthermore, members 11' and 1 without branch holes shown in FIG.
5', and then re-cladding the straight section. By adopting this construction procedure, the entire cable, which is long and has gathering and converging sections, can be connected efficiently and efficiently. It can be coated evenly with fat.

In addition,'! /: The movement of the device 1 can be accomplished by adding a self-propelled device in contact with the cable to the main body 11, which improves work efficiency.
It may be pulled by a wire wound around a winch or the like, or it may be moved by hand.

(e) Effects As explained above, according to the resin sheathing method and device of the present invention, the entire installed cable having gathering, converging parts, etc. can be sheathed with resin, and the formed resin sheathing can be ,
Because it adheres well to the outer surface of the cable through extrusion, it has extremely high reliability in terms of rust and corrosion prevention, and furthermore, exterior work can be easily performed even on complex parts of the structure.・In addition, the maintenance period is extended due to the long life of the rust and corrosion prevention effect, and in addition, resin is cheaper than corrosion-resistant pipes, so it is economically advantageous. ・Its contribution to industry is extremely large. .

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of a location where the method and device of the present invention are retained; FIG. 2 is a front view showing an example of the resin-clad device of the present invention with half of its components removed; 3
The figure is a front view of the same device in which some of the parts have been replaced with modified ones. 10...Exterior device, 11...Main body, 12...Guide roller, 13...- Resin feeding device, 14... heat source, 1
5...jacket, 16...l blackness sensor, 11
1... Branch hole (1 main body member, 15'... jacket member with branch hole, A...-cable, I3... resin coating patent applicant Sumitomo Electric Industries, Ltd. agent sickle) 1) Sentence 2

Claims (5)

[Claims] (1) A removable resin sheathing device is attached to the outer periphery of the installed cable after assembly, convergence, shaping, etc. have been completed, and the device heats and melts the raw resin that can be supplied sequentially and controls the temperature of the molten resin. A method for sheathing an installed cable by extrusion and coating the outer periphery of the cable. (2) At least in the vertical direction, 2
A split cylindrical main body, silk guide rollers installed at both ends of the main body, a raw resin feeding device installed at one end of the main body, and a raw resin feeding device near this feeding device. Equipped with a heat source for heating and melting, and a divided jacket with good peelability of the resin provided on the inner surface of the main body, the ring space formed between the inner surface of this jacket except for one end and the outer peripheral surface of the cable is
A resin sheathing device for installed cables that forms an extruded resin coating on the outer periphery of the cable through quality-controlled fluid resin. (3) A resin sheathing device for an installation cable as set forth in claim (2), wherein the jacket is detachably attached to the main body. (4) Claims characterized in that the main body and the jacket have a branch hole that intersects and communicates with the center hole, and the branch hole 1, the main body and the jacket are further divided into two in the vertical direction. A resin sheathing device for an installation cable according to item (2) or item (3). (5) The construction cape I and the tower 1 exterior sheathing according to any one of claims (2) to (4), characterized in that the main body is equipped with a self-propelled device. 0