JPH0228423Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a leak detection method that detects liquid leakage from the flanges of piping connections or the flanges of tower and tank equipment, for example in manufacturing processes that handle liquids. Regarding elements.

[Prior Art] Conventionally, a simple strip-shaped leak detection element is known in which a pair of sensor reinforcing strips are arranged in parallel on both sides of a pair of parallel sensor electrodes, and both are integrated with a strip-shaped protective layer. This leak detection element is
It is used by the user cutting it to an appropriate length and wrapping it around the monitoring target, and the surface of the strip-shaped protective layer 3 on the monitoring target side has a large number of small holes that reach the sensor electrodes. . When the leaked liquid adheres to the leakage detection element and short-circuits the sensor electrode through the small hole, the detector detects this and detects the leakage.

[Problems to be solved by the invention] However, conventional leakage detection elements
The leak detection element is simply a strip and is not designed to be attached to or detached from the monitored object, and in order to automate liquid leak detection using this leak detection element, separate adhesive tape and mounting jigs must be prepared, and installation is difficult. However, there is a troublesome problem. In addition, even though it is called a mounting jig, no special jig has been developed, so the user must prepare their own, which may damage the leak detection element or reduce its sensitivity. There are also cases where they are allowed to do so.

[Means for Solving the Problems] The measures taken to solve the above problems will be explained with reference to FIGS. 1 to 3, which correspond to an embodiment of the present invention. A pair of reinforcing bands 2a for the sensor are provided on both sides of the electrodes 1a and 1b.
2b in parallel and both 1a, 1b, 2a, 2b,
Numerous small holes 3' reaching sensor electrodes 1a and 1b
Sensor electrodes 1a and 1b are integrated with a strip-shaped protective layer 3 having
and sensor reinforcing bands 2a, 2b are extended, and connection ends 4a, 4 are provided at both ends of sensor electrodes 1a, 1b.
b, while reinforcing bands 2a, 2 for the sensor at both ends are provided.
Attach pins 5a and 5b between b, and one pin 5a
The above-mentioned problem is solved by using the hook 6, which is hooked on the other pin 5b, as a leak detection element attached via an elastic body 7.

[Function] The leakage detection element according to the present invention can be attached by wrapping it around the object to be monitored in a band shape, stretching the elastic body 7, and hooking the hook 6 onto the pin 5b. It is not necessary. At this time, the contraction force of the elastic body 7 brings the entire body into close contact with the object to be monitored, so that good sensitivity can be obtained. In addition, the tension applied by the contraction force of the elastic body 7 is supported by the sensor reinforcing bands 2a, 2b and is not applied to the sensor electrodes 1a, 1b, thereby preventing the sensor electrodes 1a, 1b from breaking. can. Furthermore, a sensor electrode 1 and a sensor reinforcing band 2 are provided.
Since the sensor electrodes 1a, 2b are integrated with the strip-shaped protective layer 3, the protection of the sensor electrodes 1a, 1b from the above-mentioned tension is more reliable, and the sensor electrodes 1a, 1b are
Scratch damage to 1b can also be prevented.

[Example] As shown in FIGS. 1 and 2, a pair of parallel sensor electrodes 1a and 1b having connecting ends 4a and 4b connected to both ends are formed with ring-shaped terminals on both outer sides. A pair of sensor reinforcing bands 2a and 2b are arranged and are integrated with a band-shaped protective layer 3. Sensor electrodes 1a, 1b and both sensor reinforcement bands 2a,
The sensor electrodes 1a and 1b are covered with the strip-shaped protective layer 3, and the sensor reinforcing strip 2 is attached to both ends of the sensor electrode 2b.
a and 2b are in an exposed state and extend further from the integrated portion of the two. A pair of sensor reinforcing bands 2
Pins 5a and 5 are provided at both ends of the annular terminals a and 2b, respectively.
b is inserted and assembled with a retaining ring 8. Further, an elastic body 7 such as a spring having a hook 6 at its tip which is opened slightly larger than the diameter of the pin 5b is attached to the pin 5a on one side, thereby forming a single leak detection element.

Sensor electrode 1 used in this leak detection element
As a and 1b, the same ones as conventional ones are used. As the reinforcing bands 2a and 2b for the sensor, for example, thin strips of stainless steel, silver-plated annealed copper wire, or other materials with excellent tensile strength and corrosion resistance are used, and as the strip-shaped protective layer 3, for example, polyethylene fluoride, etc. are used. A material with excellent water repellency and corrosion resistance is used. As shown in FIG. 3, this strip-shaped protective layer 3 has a large number of small holes 3' reaching the sensor electrodes 1a and 1b on the surface that becomes the monitoring object when it is wrapped around the monitoring object. It is. In addition, the sensor electrodes 1a, 1b and the sensor reinforcing bands 2a, 2b can be integrated, for example, by arranging them on a sheet of polyethylene fluoride, placing the same sheet over it, and then heat-sealing the upper and lower sheets. This can be done by letting

The connection ends 4a and 4b may be wiring connectors as shown in the figure, but any type of connection may be used as long as they can be connected to a detector or the like, and the sensor electrodes 1a and 1b may simply be exposed.

Figure 4 is an enlarged view of the pins 5a, 5b and the retaining ring 8. The pins 5a, 5b have four retaining ring grooves 8', two at each end, and one hook groove in the center. 6'. Pins 5a, 5b
is inserted into the annular terminals at both ends of the pair of sensor reinforcing bands 2a and 2b, and after positioning each annular terminal between the retaining ring grooves 8' at both ends, it is secured in each retaining ring groove 8'. It is assembled by fitting the ring 8. Therefore, the sensor reinforcing band 2a,
2b is locked by the retaining ring 8 and cannot be removed in the axial direction of the pins 5a, 5b, but can freely move in the rotational direction relative to the pins 5a, 5b, so that it is not easily subjected to undue force during winding. Further, the rear end of the spring, which is the elastic body 7, is wound around the hook groove 6' of the pin 5a, and the rear end of the spring, which is the elastic body 7, is wound around the hook groove 6' of the pin 5b. A hook 6 can be hung thereon. Note that the elastic body 7 may be a rubber band or the like in addition to a spring.

For example, as shown in FIG. 5, this leakage detection element is tightly wound around a flange 10 of a pipe 9 that is connected to face each other, and detects liquid leakage that occurs between the flange 10 and the gasket 11. is detected by sensor electrodes 1a and 1b. The fixing in this case is extremely simple, as it is only necessary to slightly stretch the elastic body 7 and hook the hook 6 onto the pin 5b, as shown in an enlarged view in FIG. In particular, the hook 6 is hooked onto the pin 5b by wrapping it around the part of the piping 9 shown in FIG.
It is easier to work if you fit it around 0. In the case of inspecting the flange portion 10, etc., the inspection etc. can be carried out simply by shifting the flange portion 10 in the direction of the piping 9.
Further, it is particularly effective when the pipe 9 shown in FIG. 5 is vertical, since there is no blind spot for liquid leakage detection around the entire periphery of the flange 10. In addition, in Figure 6,
For convenience, the retaining ring 8 is omitted.

[Effects of the invention] According to the invention, the sensor electrode can be easily attached to the monitoring target without preparing a special jig, and there is no fear of damaging the sensor electrodes 1a and 1b. Therefore, it becomes easy to automate liquid leakage detection and streamline maintenance work such as gasket replacement.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of the present leak detection element, Fig. 2 is a front view thereof, Fig. 3 is an enlarged sectional view of Fig. 1, Fig. 4 is an enlarged view of the pin and retaining ring, and Fig. 4 is an enlarged view of the pin and retaining ring. FIG. 5 is a diagram showing an example of how the present leakage detection element is attached, in which a is a side view, b is a front view, and FIG. 6 is an enlarged view of the portion secured by the hook in FIG. 5. 1a, 1b...Sensor electrode, 2a, 2b...
Reinforcement band for sensor, 3... Band-shaped protective layer, 3'... Small hole, 4a, 4b... Wiring connector, 5a, 5b
...Pin, 6...Hook, 7...Elastic body, 8...
Retaining ring, 9... Piping, 10... Flange, 11...
...Gasket.

Claims (1)

[Scope of utility model registration request] A pair of reinforcing bands for sensors are arranged in parallel on both sides of a pair of parallel sensor electrodes, and both are integrated with a band-shaped protective layer having a large number of small holes that reach the sensor electrodes, and covered with the band-shaped protective layer from both ends. The sensor electrode and the reinforcing band for the sensor are extended, and connecting ends are provided at both ends of the sensor electrode, and a pin is attached between the reinforcing band for the sensor at both ends, and one pin is connected to the other pin. A leak detection element characterized in that a hook that can be hung on is attached via an elastic body.