JPH0720596Y2 - Cable retractor - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a cable drawing device for drawing a cable into a pipeline inspection device that runs inside a pipeline in which gas or the like flows and inspects the inside of the pipeline. Regarding

[Conventional technology]

When running a pipeline inspection device (hereinafter referred to as a pipeline inspection pig) inside a pipeline in which gas or the like is flowing, the pipeline inspection pig must be kept airtight so that gas and the like do not enter. is there. By the way, in this pipeline inspection pig, a cable is drawn from the sensor into the pipeline inspection pig in order to send a signal from a sensor or the like provided outside the pipeline inspection pig to the inside of the pipeline inspection pig. And
This cable retracting structure is one in which a through hole is formed in the pipeline inspection pig body, the cable is passed through this through hole, and the through hole is molded in this state with, for example, epoxy resin and rubber.

[Problems to be solved by the device]

However, in the above-described structure of pulling in the cable, the vinyl sheath of the cable may be damaged or the vibration due to the movement of the cable may damage the mold portion, and the airtightness of the pipeline inspection pig may not be maintained. Also, when the cable is replaced, the replacement work becomes very complicated.

Therefore, an object of the present invention is to provide a cable retracting device that can maintain airtightness by eliminating damage to the vinyl sheath of the cable and damage to the mold portion due to movement of the cable, and that facilitates cable replacement work.

[Means for Solving the Problems]

The present invention relates to a cable pulling device for pulling a cable into a container body that travels and is immersed in a fluid, and a flanged pipe that fits into a through hole formed in the container body and can be inserted into and removed from the through hole. A seal body interposed between the flanged pipe and the container body, a conduction pin provided by fitting through the hole of the flanged pipe, and a resin for fixing the conduction pin to the hole of the flanged pipe and shielding the hole. A cable retracting device, which includes a body and a molding body that molds the cables connected to both ends of the conduction pin on both sides of the flanged pipe, respectively.

[Action]

By providing such means, the flanged pipe is penetrated through the through hole formed in the container body with the seal body interposed, and the conduction pin is shielded by the resin body in the hole of the flanged pipe. It is provided. And
The cables connected to both ends of the conduction pin are respectively molded on both sides of the flanged pipe.
Thus, the inside and the outside of the container body are completely separated, the damage of the vinyl sheath of the cable and the damage of the mold part due to the movement of the cable are eliminated, and the replacement work of the cable is facilitated by replacing the flanged pipe.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram of a cable drawing device, and FIG. 2 is a configuration diagram of a pipeline inspection pig to which the device is applied. Reference numeral 1 denotes a pig body, and a circular through hole 2 is formed in the pig body 1. A flanged pipe 3 that fits into the through hole 2 is inserted into the through hole 2. This flanged pipe 3 has a third flange 3a
As shown in the figure, it is formed in a quadrilateral shape, and screw holes 4a, 4b, 4c, 4d are formed in the respective corner portions. Also, flange 3
A groove 6 for arranging the O-ring 5 is formed on the back surface of a. Further, the conduction pin 7 is arranged to fit into the hole of the flanged pipe 3, and the epoxy resin 8 is filled in the hole of the flanged pipe 3 in this arranged state. In this case, both ends of the conduction pin 7 project from the epoxy resin 8. The cores of the internal cable 9 and the external cable 10 are connected to both ends of the conduction pin 7 by soldering. Further, the internal cable 9 is molded 11 with rubber on the pipe 3b side of the flanged pipe 3, and the external cable 10 is molded 12 with rubber on the flange 3a side of the flanged pipe 3. The mold 11 is formed smaller than the pipe diameter of the flanged pipe 3. And then
A relay connector 13 having a diameter smaller than that of the through hole 2 is attached to the other end of the internal cable 9. However, the flanged pipe 3 is inserted into the through hole 2 and then the screws 14, 1
It is fixed to the pig body 1 by tightening 4.

Next, the configuration of the pipeline inspection pig will be described. The pipeline inspection pig 20 has an arrow (a) inside the pipeline 21 due to the fluid pressure of gas or the like flowing in the pipe.
It is supposed to run in the direction. A measuring instrument 22 is provided inside the pig body 1 of the pipeline inspection pig 20. The measuring instrument 22 has a function of receiving a signal from a sensor 23 provided outside the pig body 1 and inspecting the inside of the pipeline 21. Here, the external cable 10 connected to the sensor 23 is connected to the internal cable 9 via the cable retracting device shown in FIG. On the other hand, traveling wings 24 to 27 are provided outside the pig body 1.

With such a configuration, since the O-ring 5 is interposed between the through hole 2 and the flanged pipe 3, the flanged pipe 3 is fixed to the pig body 1 by the screws 14 and 14, so that the through hole 2 And the flanged pipe 3 are completely sealed. Further, the inside of the pipe 3b of the flanged pipe 3 is completely sealed by filling with epoxy resin. Further, the molds 11 and 12 will not be damaged due to damage of the cables 9 and 10 and vibration caused by movement of the cables 9 and 10. Therefore, the pig body 1 is completely kept airtight. Since the airtightness is a double structure of the epoxy resin 8 and the molds 11 and 12, its reliability is high. Further, when replacing the cables 9 and 10, the flanged pipe 3 is integrally removed from the pig body 1 together with the epoxy resin 8, the molds 11 and 12, the cables 9 and 10, and the like. Each mold
A new flanged pipe 3 integrally provided with 11, 12 and the like will be attached. Therefore, the replacement work of the cables 9 and 10 becomes very easy. As a result, the pipeline inspection pig 20 can be kept airtight to ensure safety, and the work of replacing the cables 9 and 10 and the sensor 23 can be facilitated.

It should be noted that the present invention is not limited to the above-described embodiment, and may be modified without departing from the spirit of the invention. For example, the conductive pin 7 is not limited to one, and a plurality of conductive pins may be provided, and the resin filled in the hole of the flanged pipe 3 is not limited to epoxy and may be any resin that is an electrical insulator. Further, not only the flanged pipe 3 but also a structure in which the through hole 2 is fitted and sealed may be used. Further, the invention is not limited to the pipeline inspection pig running in the pipeline 21, but may be applied as long as the cable is pulled into a container running in the fluid or a container immersed in the fluid.

[Effect of device]

As described in detail above, according to the present invention, it is possible to provide a cable retracting device that can maintain airtightness without damaging the vinyl sheath of the cable and the mold portion due to the movement of the cable, and that facilitates the cable replacement work.

[Brief description of drawings]

1 to 3 are views for explaining an embodiment of a cable retracting device according to the present invention, in which FIG. 1 is a configuration diagram and FIG. 2 is an overall view when applied to a pipeline inspection pig. FIG. 3 is an outline view of the flange of the flanged pipe. 1 ... Pig main body, 2 ... Through hole, 3 ... Flange pipe, 5 ... O-ring, 6 ... Groove, 7 ... Conduction pin, 8 ...
… Epoxy resin, 9 …… Internal cable, 10 …… External cable, 11,12 …… Mold, 13 …… Relay connector, 14…
… Screws, 20 …… Pipeline inspection pigs, 21 …… Pipelines, 22 …… Measuring instruments, 23 …… Sensors.

Front Page Continuation (72) Inventor Mineo Kurashima 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Steel Pipe Co., Ltd. (72) Inventor Takashi Chiba 1-3-1, Uchiyuki-cho, Chiyoda-ku, Tokyo In-house (72) Inventor Naoki Kawanishi 4-1-2 Hirano-cho, Chuo-ku, Osaka-shi, Osaka Inside Osaka Gas Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A cable pulling device for pulling a cable into a container body for traveling and immersing in a fluid, the flanged pipe being fitted into a through hole formed in the container body and being insertable into and removable from the through hole. A seal body interposed between the flanged pipe and the container body, and a conduction pin provided by fitting through the hole of the flanged pipe,
A resin body for fixing the conduction pin to the hole of the flanged pipe and shielding the hole, and a mold body for molding each cable connected to both ends of the conduction pin on both sides of the flanged pipe, respectively. A cable retracting device characterized by being provided.