JPS58135932A - Detector for damage of expansion joint made of rubber - Google Patents

Abstract

PURPOSE:To enable the detection of damage and deterioration of a joint, by a method wherein a continuous conductor is woven in an expansion joint made of rubber to detect a change in electric properties of the conductor. CONSTITUTION:Reinforcing threads 2 are woven in an expansion joint body 1 made of rubber, a conductor 3 made of a single continuous conductive material is placed in the reinforcing threads 2, and the opposite ends thereof come out to the outside. The conductor 3 is connected to a detector (resistance meter) 5 through an extension cable 4. Since the condutor 3 is a continuous conductive body, it holds an approximately constant resistace unless otherwise cut, and if a rubber ages and deteriorates in a yield strength, when a rubber is damaged, the conductor, simultaneously, is brought to breaking. If broken, the conductor is sharply increased in resistance, and thereby breaking can be detected by the detector 5.

Description

[Detailed Description of the Invention] A large diameter rubber expansion joint attached to a cooling pipe of a ship's engine is damaged due to aging of the rubber or other reasons.

Occasionally, accidents occur that cause heavy flooding and result in ships sinking. If damage to expansion joints, and if possible aging of the rubber, can be detected early, these tragic accidents can be prevented.

The present invention provides early detection of aging of rubber expansion joints.
It was invented for this purpose.

In the present invention, a conductor is continuously connected to a rubber expansion joint.
It relates to a damage detection device for rubber expansion joints, which is characterized by detecting changes in the electrical characteristics of the conductor by extending both ends outside the rubber and detecting all damage and deterioration of the joint. Is there a conductor inside the rubber reinforcement system that forms the joint? : When the wire gets stuck in, take out both ends of the conductor outside the rubber, measure the electrical resistance at both ends of the taken out conductor, and detect any damage to the rubber based on the change in electrical resistance. Namely.

The present invention aims to provide a damage detection device for rubber expansion joints that detects the breakage of conductive wires woven into the housing when the rubber is torn, and can be applied to rubber expansion joints.

An embodiment of the damage detection device for rubber expansion joints of the present invention is shown in FIG. Figure 2 will be explained.

Fig. 1 is an explanatory diagram of an embodiment of the damage detection device for rubber expansion joints of the present invention, Fig. 2 is a perspective view of the present invention implemented as an automatic safety measure. A rubber expansion joint body with reinforcement system 2 woven into it, and reinforcement system 2 woven into it.
A conductive wire 5 made of a continuous conductive material is contained, and its ends extend outside the rubber. The conductor 3 is connected to a detector (resistance needle) 5 through an extension cable 4, 6 is a motor-driven seawater suction valve, 7 is an emergency J disconnection alarm, 8 is a seawater suction box, and 9 is a hull shell.

The operation of the present invention will be explained. Since it is continuous with the conducting wire 3 and is a good conductor, the resistance of the wire 9 is maintained at a constant level unless it is cut. As the rubber ages and its yield strength decreases, the conductor wire breaks simultaneously with the rubber breakage.If the rubber breaks, the conductor resistance increases significantly, and the breakage can be detected by the detector 5. At the same time as the detector 5 detects a break in the conductor S, the contact t-
Operation Saze motor drive seawater intake ff6t-J+l! +? Generate the latest information. Although the number of conductors is one, it is assumed that there are multiple conductors.
It is also possible to measure reliable detection. In addition to incorporating the conductive wire in the same way as the reinforcing system, it is also possible to incorporate it into the rubber completely as a single piece.

In addition to resistance, current or voltage may be used as the detection method.

The present invention has the above-mentioned bottom-up exercises, and has a unique effect.

(1) Blowout and partial damage to rubber expansion joints.

In the case of VC construction, it can be detected early by using the reliable method of changing the electrical resistance value, rather than using hard-to-detect methods such as water leakage or cracks due to a decrease in proof strength due to aging of the rubber.

(2) Since the monitoring is conducted by electrical method VC, continuous monitoring is possible and automatic safety measures such as those shown in Fig. 2 are also possible.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of an embodiment of the damage detection device for a rubber expansion joint of the present invention, No. 21! i! Figure 1 shows an explanatory diagram in which the present invention is incorporated into automatic safety measures. 1... Rubber expansion joint main body of the present invention, 2...
... Reinforcement system, 5 ... Conductor, 4 ... Extension cable, 5 ... Detector, 6 ... Motor-driven seawater intake valve, 7. ...Kikyu-ton II'r
Report 11, 8...Seawater intake box, 9...Hull shell. Sub-agent 9P bureau Kazuo Nakajima

Claims (1)

[Claims] A rubber expansion joint characterized by weaving a continuous electrical conductor wire into a rubber expansion joint, extending it to the outside of both GST rubber, and detecting a change in the electrical characteristics of the conductor to detect damage or deterioration of the F joint. Expansion joint damage detection Ii & placement.