JPH0438283Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to an oil leakage detection sensor that detects oil leakage from piping that transports various oils.

[Conventional technology]

Conventionally, this type of oil leakage detection sensor has been used to detect oil leakage by floating it in a water storage tank,
There are flat cables that detect leaks of various oils, and are attached to the location to be detected using adhesive, wire, etc.

In addition, oil leaks from joints in oil transport piping can be dealt with by placing liquid collection containers in advance, and leaks can be detected through periodic inspections and the piping can be repaired. There is.

[Problem that the invention attempts to solve]

However, when attempting to install such a conventional oil leak detection sensor at the joint of piping for transporting oil liquid, it is difficult to place the oil leak detection sensor accurately at the intended detection position, and ,
There is a problem in that it is difficult to know whether the sensor can successfully capture leaking oil until the leak actually occurs.

This idea was devised by focusing on these conventional problems, and provides an oil leak detection sensor that can be easily attached to oil liquid transport piping and can reliably detect oil leaks. This is what we do.

[Means for solving problems]

This idea consists of an oil leakage detection member made of a continuous porous fluororesin containing a conductive substance and having at least a pair of oil leakage detection conductors spaced apart from each other, which is arranged on the mounting surface of a strip-shaped mounting member. In the oil detection sensor, a recessed groove is formed in the mounting surface of the mounting member, the oil leakage detection member is disposed in the recessed groove so as to be lower than the level of the mounting surface, and In order to lock along the circumferential surface of the oil leakage detected part, engaging members that engage with each other are provided at both ends of the mounting member in the longitudinal direction.

[Effect]

Continuous porous fluororesin containing conductive material is
It is impregnated with oil leakage and is interposed between a pair of oil leakage sensing conductors, changing the electrical resistance value between both conductors. The mounting member wraps around and locks around the joints and flange joints of the oil transport piping, allowing the oil leakage detection member placed on the mounting surface to be directly attached to the detected part to ensure reliable detection of oil leaks. .

Also, the concave grooves of the mounting members become oil leakage pools,
Prevents oil from flowing down to the floor, etc.

〔Example〕

Hereinafter, an embodiment of the oil leakage detection sensor according to the invention will be described in detail as shown in the drawings.

In the figure, reference numeral 1 denotes an oil leak detection sensor, which is composed of an oil leak detection member 2 and a mounting member 3.

The oil leak detection member 2 has a continuous porous polytetrafluoroethylene resin (PTFE) 4 containing carbon powder, which is a conductive substance, and connects two oil leak detection conductors 5, which are copper wires, to each other. They are coated and formed so as to be kept apart.

The mounting member 3 is made by stacking two strip-shaped tetrafluoroethylene resin sheets 3a and 3b, and two stainless steel strips 6 are placed between the sheets 3a and 3b. , 6 are arranged along the longitudinal direction at predetermined intervals, and the stainless steel bands 6, 6 are arranged from both ends of the mounting member 3 in the longitudinal direction.
Both ends of each protrude. The ends of the stainless steel bodies 6, 6 on the same side protruding from both ends of the mounting member 3 are fixed to one fixing shaft 7, and the longitudinal direction of the mounting member 3 is One end of an engagement spring member 8 is pivotally connected to the fixing shaft 7 provided on the side end side. Further, the other end of the engagement spring member 8 is located at the other end in the longitudinal direction of the mounting member 3 of another oil leak detection sensor 1 that is engaged with the mounting member 3, as shown in FIG. 3, which will be described later. A hook portion 8a is formed which engages with a fixing shaft 7 provided at.

Furthermore, a groove 3c into which the oil leak detection member 2 is inserted is formed on the mounting surface (the right side in FIG. 2) of the mounting member 3, and the bottom surface of the groove 3c is made of tetrafluoroethylene resin. After etching the surface, the oil leak detection member 2 is adhered to the bottom surface.

Note that the oil leak detection conductors 5, 5 of the oil leak detection member 2
is guided from the concave groove 3c to one end of the mounting member 3 while keeping the tetrafluoroethylene resin sheets 3a and 3b spaced and insulated, and the insulation coating 9
The lead wire 10 is obtained by applying the following steps. In addition, in the figure,
11 is a connector provided on the lead wire 10;
It can be connected to an oil leak detection device (not shown) or the like.

Next, the usage and operation of this oil leak detection sensor 1 will be explained.

First, the oil leak detection sensor 1 is a detected part, for example, oil liquid transport piping 12, 1 as shown in FIG.
An appropriate number of mounting members 3 are selected whose length when combined is slightly shorter than the circumferential length of the flange parts 13, 13 connecting the flange parts 13, 13. It is preferable that an appropriate elastic force be generated in the spring material 8 when it is attached along the circumferential surface and locked with the engagement spring material 8. Note that even if the circumferential length of the detected portion changes somewhat, there is considerable applicability due to the elasticity of the engagement spring member 8.

Furthermore, when the oil leakage detection member 2 is positioned below the detected part, it can reliably catch the oil leakage that has flowed down, and it is also possible to detect oil leakage at a position above the detected part. .

If the mounting surface of the mounting member 3 is mounted so as to face the detected part in this way, the leakage liquid can reliably reach the oil leakage detection member 2, and the continuous porous tetrafluoroethylene resin 4 The oil leakage occurs between the oil leakage sensing conductors 5, 5, and increases the electrical resistance value.

Further, when the electrical resistance value increases as described above, an oil leakage detection device (not shown) connected to the lead wire 10 detects the change and determines that there is an oil leakage. be given a warning.

In addition, in the above embodiment, the groove 3 of the mounting member 3
c is relatively deep and arranged so that the upper surface of the oil leak detection member 2 is lower than the mounting surface level,
Since the leaked oil can be collected in the upper part of the concave groove 3c, it is possible to prevent the leaked oil from flowing down to the floor etc. for a while after the oil leakage state is detected.

Although the embodiments have been described above, the oil leak detection sensor according to this invention can be modified in various other ways. For example, in the oil leak detection member 2, the number of oil leak detection conductors 5 can be limited to one pair. It is also possible to have a configuration having multiple pairs, and
A plurality of oil leak detection members 2 are provided on the mounting member 3,
By detecting oil leakage at each position of the oil leakage detection member 2, a configuration may be adopted in which the location where oil leakage occurs can be precisely grasped.

Furthermore, in the above embodiment, in the oil leak detection member 2, the continuous porous tetrafluoroethylene resin 4 is interposed between the oil leak detection conductors 5, 5, but only partially. It is also possible to have a structure in which a continuous porous tetrafluoroethylene resin is interposed.

Furthermore, as the continuous porous fluororesin that separates the oil leakage sensing conductors from each other, in addition to the tetrafluoroethylene resin used in the above example, porous incompletely calcined tetrafluoroethylene resin, Possible selections include fired and stretched porous tetrafluoroethylene resin, incompletely fired and stretched porous tetrafluoroethylene resin, and porously molded tetrafluoroethylene-hexafluoropropylene copolymer.

Further, in the above embodiment, the fixing shafts 7, 7 provided at both ends of the mounting member 3 are connected by the engagement spring members 8, but substantially both ends of the mounting member 3 are elastically connected. It is also possible to have a configuration in which they are connected by a member or a tightening member.

[Effect of idea]

As is clear from the above explanation, the oil leakage detection sensor according to this invention has the advantage of being able to be quickly installed on the detected parts such as oil transport piping, and is therefore useful for piping in factories, etc. This has the effect of reducing the burden on the installation worker in a narrow place where a large number of people are gathered together.

Further, there is an effect that the oil leak detection member can be reliably attached to the detected part.

Furthermore, there is an effect that the groove of the mounting member can be used as a temporary oil leakage reservoir.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the oil leakage detection sensor according to the invention, Fig. 2 is a cross-sectional view of the same, and Fig. 3 shows the oil leakage detection sensor attached to the flange. FIG. 1... Oil leak detection sensor, 2... Oil leak detection member,
3...Mounting member, 3c...Concave groove, 4...Continuous porous tetrafluoroethylene resin, 5...Oil leak detection conductor,
8... Spring material for engagement, 10... Lead wire, 12...
...Oil liquid transport pipe, 13...Flange part.

Claims (1)

[Claims for Utility Model Registration] (1) An oil leakage detection member made of a continuous porous fluororesin containing a conductive substance and having at least a pair of oil leakage detection conductors spaced apart from each other as a strip-shaped mounting member. In the oil leak detection sensor disposed on the mounting surface of the mounting member, a concave groove is recessed in the mounting surface of the mounting member,
The oil leakage detection member is disposed in the groove so as to be lower than the mounting surface level, and the mounting surface is fixed in order to be secured along the circumferential surface of the oil leakage detected portion of the oil liquid transport pipe. An oil leakage detection sensor characterized in that engaging members that engage with each other are provided at both ends of the member in the longitudinal direction. (2) The oil leak detection sensor according to claim 1, wherein the mounting member is made of fluororesin.