JPH09139241A - Circuit compensation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the quickness and safety for wiring work, in an explosionproof area such as a petrochemical plant. SOLUTION: This device has a housing 13 for housing a circuit board 12 etc., and a protective tube socket 14, for communicating the inside and outside of the housing and having a cable passing hole; and is provided with a cable supporting metal fitting in the inside of the housing 13 facing the cable passing hole. A tip part 21, wherein a sheath on the tip side of a wiring cable 10 is separatedly removed to make a shielding wire be exposed previously, is inserted into the cable passing hole of the socket 14 to be fixed to the cable supporting metal fitting via a cable presser metal fitting 16. Then, a core wire 22, extending from the tip part 21, is press contacted to the circuit board 12, etc., via a screw 20, or the core wire, protruded from the cable presser metal fitting 16, is connected to the circuit board 12, etc., via a relay cable. Consequently, in wiring work, for distributing power to respective service areas from a power distribution base in an explosion proof area such as a chemical plant; electric work, such as the solder-casting fixing of the core wire of a wiring cable, can be omitted to improve safety and workability, and also the stop of equipment or a device can be eliminated to remove restraing on work.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line compensator used in a place where fire is strictly prohibited and having an explosion-proof structure.

[0002]

2. Description of the Related Art In an explosion-proof area such as a petrochemical plant, electric power is distributed from a distribution base to each service area by piping up to a line compensator.

FIG. 9 shows a conventional example of a line compensator. When the wiring cable 1 extending from the power distribution base and extending from the piping is connected and wired to various devices via the line compensator 2 installed in the service area where the power is distributed, a plurality of wires derived from each pipe (not shown) The wiring cable 1 is passed through the protective tube socket 3 on the side of the line compensator 2, and then the sheath at the tip of the wiring cable 1 is peeled off to expose the shielded wire 10 and the tip 4 as shown in FIG.
Is formed, and the core wire 5 is exposed from the tip portion 4 for a required length. After inserting the tip of the cable consisting of the tip 4 and the core wire 5 into the connector 6 for connection, as shown in FIG. 11, the solder 8 is poured into the mouth pipe 7 of the connector 6 for connection by using an electric tool, and the core 5 Fix the tip of. Next, as shown in FIG. 12, the connection cable 6 is electrically connected to the circuit board by screwing the connection connector 6 to the threaded connector 9 provided on the circuit board in such a state. Connect to.

[0004]

By the way, the electric work for pouring the solder 8 using the electric tool is prohibited in order to ensure safety in the service area where the surrounding environment is an explosion-proof area. Therefore, when performing the soldering work, at least the operation of the equipment in the service area is stopped, and the working time is limited.

There is no problem if the soldering work can be carried out in a place other than the explosion-proof area in advance. However, since the through hole of the protective tube socket 3 is large enough for the wiring cable 1 to be inserted, a connector for connection is provided. 6 cannot pass through the protective tube socket 3. Therefore, the connection to the circuit board in the line compensator 2 is performed by passing the wiring cable 1 through the protective tube socket 3 once, and then setting the connection connector 6 and then pouring the solder 8 using an electric tool. I have no choice.

Further, when connecting the connecting connector 6 to the threaded connector 9 on the side of the line compensator 2 by screwing, it is necessary to secure a space required for manual work by an operator. As a result, the line compensator 2 itself becomes large and heavy.

Therefore, in view of the above-mentioned conventional problems, a main object of the present invention is to prevent electric work for ensuring safety when wiring the line compensator 2 in the explosion-proof area.

[0008]

According to the present invention, there is provided a housing for accommodating a circuit board and the like, and a protection tube socket having a cable passage hole for communicating the inside and the outside of the housing with the cable passage hole. A cable support fitting is provided inside the housing facing the front end of the wiring cable, and the sheath on the tip side of the wiring cable is peeled off in advance to allow the tip end of the shielded wire exposed to be inserted into the cable through hole of the protection tube socket. Fixed to the cable support bracket via the bracket,
A core wire extending from the tip portion is pressed against the circuit board or the like via a screw.

Further, according to the present invention, the core wire protruding from the cable pressing metal fitting can be connected to the circuit board or the like via a relay cable.

With the above construction, in the wiring work for distributing electricity from the distribution base to each service area in an explosion-proof area such as a chemical plant, electrical work such as fixing the core wire of the wiring cable by pouring solder is not necessary, It is possible to easily and easily connect and connect the wiring cable to the circuit board or the like in each service area without any restriction that the operation is stopped at least in the service area due to electrical work for ensuring safety.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings with reference to FIGS. In a service area where power is distributed through a pipe from a power distribution base (not shown), a plurality of wiring cables 10 derived from the respective pipes
Are electrically connected to the circuit board 12 in the line compensator 11.

In the line compensator 11, a plurality of protective tube sockets 14 are screwed into a housing 13 to project therefrom, and a cable support fitting 15 is provided inside the housing 13.
A pair of upper and lower cable holding fittings 16 and 17 are provided at positions corresponding to the protection tube sockets 14 of the cable supporting fitting 15 such that they can be tightened by fixing screws 18. In addition, the cable pressing metal fitting 16,
A cable core pressing member 19 is provided on the circuit board 12 at a position facing 17 so as to be fastened by a fixing screw 20.

In the wiring cable 10, as shown in FIG. 3, in preparation for electrical connection to the circuit board 12, the shield wire 30 is exposed by exfoliating and removing the sheath by a length required for the tip. The tip portion 21 is formed, and the one in which the core wire 22 is exposed from the tip of the tip portion 21 is prepared.
A conductive tape 23 made of copper or the like is wound around the entire peripheral surface of the tip portion 21 so that the shield wire 30 does not protrude toward the core wire 22 side.

When the wiring cable 10 having the tip end formed as described above is connected to the line compensating device 11, as shown in FIG.
The fixing screws 18 of Nos. 6 and 17 and the fixing screw 20 of the cable core pressing member 19 are both loosened or removed. In this state, the tip of the wiring cable 10 is inserted into the protective tube socket 14 on the line compensator 11 side.

Next, as shown in FIG. 5, the protective tube socket 1
The distal end portion 21 of the wiring cable 10 exposed inside the housing 13 by being inserted into the housing 4 is sandwiched between the cable pressing metal fittings 16 and 17, and the core wire 22 is connected to the cable core wire pressing metal fitting 19 of the circuit board 12. To be sandwiched between. At this time, when the tip portion of the wiring cable 10 is inserted into the protective tube socket 14, the tip portion 21 and the core wire 22 of the wiring cable 10 are inevitably arranged on the cable support fitting 15 between the cable holding fittings 16 and 17 and the circuit board. The cable core wire retainer 19 on 12 is fitted and positioned. Then, by tightening the fixing screws 18 and 20 of each holding metal fitting,
Electrical connection between the wiring cable 10 and the circuit board 12 is completed simply and quickly.

That is, in the above-described embodiment, since electrical work such as soldering is not required when connecting the wiring cable 10 and the circuit board 12, the service area thereof is ensured in order to ensure safety in the explosion-proof area. It is not necessary to stop the operation of the equipment or the equipment in.

When the wiring cable 10 is connected to the connection portion provided at an arbitrary position on the circuit board 12, the cable core pressing member 19 on the circuit board 12 shown in FIG. 5 is not used. The second embodiment in which wiring is performed by the relay cable 25 having the cable connector 24 shown in FIGS. 6 to 8 is also possible. Furthermore, the cable core wire retainer 19 may be omitted, and the fixing screw 18 may be wound around and tightened.

First, as shown in FIG. 6, the distal end portion 21 of the wiring cable 10 is housed between the cable holding metal fittings 16 and 17 on the cable supporting metal fitting 15, and the core wire 22 exposed therefrom is prepared. It is inserted in 24 and fixed with LS screw 26. At this time, the two grounding cables 27, 27 led out from the cable connector 24 are fastened together with the fixing screws 18 for the cable pressing fittings 16, 17.

Next, as shown in FIG. 7, the relay cable 25 having a required length is inserted into the circuit board side connector 28, the circuit board side connector 29, or the like provided at an arbitrary position of the circuit board 12. Wiring cable 10 and circuit board 12
The wiring is completed by connecting with.

[0020]

As described above, according to the present invention, the core wire of the wiring cable is fixed by pouring the solder in the wiring work for distributing power from the distribution base to each service area in an explosion-proof area such as a petrochemical plant. There is no need for electrical work using an electric tool at the time, and there is no restriction that at least the operation of the service area is stopped to ensure safety for electrical work as in the past, and wiring cables can be used for circuit boards etc. in each service area. Connection wiring becomes possible simply and easily. Moreover,
Since the device is light and small, there is an advantage that the installation space can be reduced.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional plan view showing a first embodiment of a line compensator according to the present invention.

FIG. 2 is a side view showing the first embodiment.

FIG. 3 is a perspective view showing a wiring cable of the first embodiment.

FIG. 4 is a perspective view showing a part of the line compensator side of the first embodiment.

FIG. 5 is a perspective view showing a state in which the wiring cable is inserted into the line compensator side in the first embodiment.

FIG. 6 is a perspective view showing a state in which a wiring cable is connected to a line compensator side by a relay cable according to a second embodiment of the present invention.

FIG. 7 is an overall perspective view showing a state in which a wiring cable is connected to a line compensator side by a relay cable in the second embodiment.

FIG. 8 is a detailed plan view showing a relay cable and accessory parts of the second embodiment.

FIG. 9 is a plan view showing a conventional line compensator.

FIG. 10 is a side view showing a mode in which a connector for connection is attached to a distal end portion of a wiring cable in which a core wire of the conventional example is exposed.

FIG. 11 is a side view showing a mode of solder pouring and fixing to a core wire after the connection connector is mounted in the conventional example.

FIG. 12 is a diagram showing a conventional example in which solder is poured into a core wire and fixed,
It is a side view which shows the aspect which connects a connector for connection with the connector with a screw | thread of the apparatus side.

[Explanation of symbols]

 10 Wiring Cable 11 Line Compensator 12 Circuit Board 13 Housing 14 Protective Tube Socket 15 Cable Support Metal Fitting 16 Cable Holding Metal Fitting 17 Cable Holding Metal Fitting 19 Cable Core Wire Holding Metal Fitting 21 Tip Part 22 Core Wire 24 Cable Connector 25 Relay Cable 27 Grounding Cable 28 Circuit Board side connector 29 Circuit board side connector

Claims (2)

[Claims] 1. A cable having a housing containing a circuit board and the like, a protective tube socket having a cable passage hole for communicating the inside and the outside of the housing, and a cable inside the housing facing the cable passage hole. A support metal fitting is provided, and the sheath on the tip side of the wiring cable is peeled off to expose the shield wire, and the tip is inserted into the cable through hole of the protection tube socket, and then the cable support metal fitting is inserted through the cable holding metal fitting. A line compensator, which is fixed and in which a core wire extending from the tip portion is pressed against the circuit board or the like via a screw. 2. The line compensator according to claim 1, wherein the core wire projecting from the cable holder is connectable to the circuit board or the like via a relay cable.