JPH0645199U - Pipe repair cover - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a pipe repair cover that can repair a liquid leakage point of a pipe in a short time with sufficiently excellent waterproofing regardless of the pipe diameter and repair length. To do. [Structure] A water-expandable rubber layer is fixed to the inner surface of a rigid cover having a C-shaped cross section.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cover used for emergency repair of liquid leakage in plant piping.

[0002]

[Prior art]

 In plant piping that has been used for a long period of time, liquid leakage due to perforation and cracks in the piping is often seen.

In order to deal with such a liquid leak, an emergency treatment is usually performed to continue the operation of the line, and the operation of the line is stopped at a time to carry out a pipe replacement work. Conventionally, for the above-mentioned emergency treatment, a repair tape is applied around a leaking point of a pipe while applying a curable resin liquid, and a cracked cover with a rubber sheet attached to the inner surface is bolted. A method is used in which the nut is tightened to make it cling to the liquid leakage location in the pipe.

[0004]

[Problems to be solved by the device]

 However, when winding a repair tape, it is necessary to stop the flow until the curable resin liquid is cured, and it takes a considerable period of time to complete this curing, so the operation of the line is considerably difficult. I have to stop for a long time.

On the other hand, even in the case of embracing the cover, it is impossible to tighten the bolts and nuts with one touch, and it takes some time to tighten the bolts and nuts. For safety reasons, it is necessary to temporarily stop the operation of the plant if the worker's contact time with the chemical liquid cannot be so long for safety reasons.

Further, in the above-mentioned cover, since the dimensions are fixed, it is necessary to prepare various kinds of diameters depending on the pipe diameter, which makes storage difficult, and the length is insufficient. There is also a problem that it may not be possible to satisfactorily stop the liquid leakage.

An object of the present invention is to provide a pipe repair cover capable of repairing a liquid leakage location in a pipe in a short time and with sufficiently excellent water shutoff regardless of the pipe diameter and repair length. To provide.

[0008]

[Means for Solving the Problems]

 The pipe repair cover of the present invention is characterized in that a water expansion rubber layer is fixed to the inner surface of a rigid cover having a C-shaped cross section.

[0009]

[Action]

 At the initial stage of fitting the repair cover into the pipe, the water expansion rubber was not fully expanded, the tightening pressure on the pipe was small, and the degree of liquid leakage from the cover opening of the repair cover was observed. However, it can be positioned at the optimum position. Due to this optimum positioning and the subsequent expansion of the water-expandable rubber, it is possible to repair with good water shut-off.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a rigid cover having a C-shaped cross section, which is obtained by processing a stainless steel plate, a titanium plate or the like into a C-shaped cross section, or by cutting out a synthetic resin extruded pipe made of vinyl chloride resin or the like. Etc. can be used.

Reference numeral 2 denotes a water-expandable rubber having excellent chemical resistance (acid resistance, alkali resistance) and heat resistance (expansion rate is about 2 times), and a cut pipe-shaped molded body (cutting is oblique or as shown in the figure). It is desirable to perform it in a polygonal line shape) by the adhesive 3 on the inner surface of the cover-1. It is preferable to use, as the adhesive agent 3, an adhesive agent that has an elongation that can follow the expansion of the water-expandable rubber 2 to some extent.

In order to repair the liquid leakage portion of the pipe by using the pipe repair cover, the cover is cut into a desired length, the cut cover is expanded, and the expanded opening is used. It is fitted to the liquid leakage part of the pipe, and then the expansion of the water expansion rubber increases the contact pressure between the pipe and the water expansion rubber to stop the water.

After fitting the repair cover to the pipe, it is also possible to tighten several points on the outer surface of the cover with, for example, rings 4 shown in FIG. When the ring is tightened, the water stop has already been completed and the worker will not come into contact with the chemical solution.

In the above, in the initial stage of fitting the repair cover to the pipe, the water-expandable rubber is not fully expanded, the cover is loosely tightened to the pipe, and the cover is fitted to the pipe. It is ideal for stopping liquid leakage while moving the cover while observing the degree of liquid leakage from the opening with the cover opening facing upward. Can be positioned at

On the other hand, in the case where the usual rubber packing material is fixed to the inner surface of the cover, it is necessary to fit the cover to the pipe in a tightly tightened state from the beginning, and it is difficult to position the cover. However, water blocking failure is likely to occur due to poor positioning.

However, in the pipe repair cover of the present invention, as described above, the cover can be positioned at the optimum position for stopping water, and thereafter, the expansion of the water expansion rubber causes the expansion of the water expansion rubber and the pipe. Since the contact pressure between them can be increased, good water-stopping can be guaranteed by this high contact pressure and the positioning of the cover at the optimum position.

In the above embodiment, the water-expandable rubber is provided on the entire inner surface of the C-shaped cross-section cover, but as shown in FIG. It is also possible to fix the ring-shaped water-expandable rubber 2 with an adhesive 3 at intervals in the direction.

[0019]

[Effect of device]

 The pipe repair cover of the present invention is configured as described above, and the liquid leak can be stopped by simply fitting it to the liquid leak point of the pipe through the cover opening, and the liquid flow through the pipe can be continued. The piping can be repaired in a short time.

Further, the length can be adjusted by cutting, and even if the pipe diameter of the pipe is slightly different, it can be dealt with by the elasticity of the cross-section C-shaped cover, the elasticity of the water-expanded rubber or the expansion of the water-expanded rubber.

[0021] Therefore, by using the pipe repair cover of the present invention, it is possible to provide an emergency response to a liquid leak in the plant pipe without stopping the operation of the line and by preparing a small number of repair covers. Can be repaired.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing an example of a ring that is fastened to the pipe repair cover of the present invention.

FIG. 3 is a cross-sectional view showing another embodiment of the present invention.

[Explanation of symbols]

 1 Cross-section C type cover 2 Water expansion rubber

Claims (1)

[Scope of utility model registration request] 1. A pipe repair cover characterized in that a water-expandable rubber layer is fixed to the inner surface of a rigid cover having a C-shaped cross section.