JPH0736105U - Explosion-proof optical repeater - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to a flameproof optical repeater used for connecting a non-intrinsic circuit and an intrinsically safe circuit with an optical fiber.
It is an object of the present invention to provide a flameproof explosion-proof optical repeater in which the attenuation of an optical signal is suppressed as much as possible in a fully closed container having a flameproof explosionproof structure, and the mounting work is simple and easy. [Structure] A socket main body 1 is attached to a pressure-resistant explosion-proof fully-closed container 100 in a pressure-proof state, and an optical fiber 3 is inserted into the socket main body 1 from one end to the other end and the other end is fully closed. Since the optical fiber 3 is extended by a predetermined length in 100 and the terminal connector 5 is connected to the end of the extended optical fiber 3, one end of the optical fiber 3 in the socket body 10 is connected. Optical fiber 3 from outside
And the terminal connector 5 can be connected to the photoelectric conversion unit in the fully closed container 100, and the optical signal from the outside can be propagated into the fully closed container 100 without being attenuated and the assembly / assembly in the fully closed container 100 can be performed. Installation work can be simplified.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pressure-resistant explosion-proof optical repeater used when connecting a non-intrinsically safe circuit and an intrinsically safe circuit with an optical fiber, and particularly to a pressure-proof explosion-proof type capable of reducing attenuation of an optical signal propagating in the optical fiber as much as possible. Optical repeater. Here, the intrinsically safe circuit is a circuit having an intrinsically safe explosion-proof structure, which has been confirmed by tests and the like by a public institution that an explosive gas will not be ignited by electric sparks or high temperature parts that occur during normal operation and accidents. Say. Non-intrinsically safe circuits are circuits that do not have an intrinsically safe structure. In addition, a hazardous area is a place where flammable gas or vapor of flammable liquid (hereinafter, explosive gas) exists or may exist.

[0002]

[Prior art]

 Conventionally, there is a pressure-resistant explosion-proof optical repeater of this type shown in FIG. FIG. 5 is an installation state diagram of a conventional pressure-resistant explosion-proof optical interrupter.

This conventional pressure-resistant explosion-proof optical repeater is a socket body 101 (or 202) that is mounted in a flame-proof state in a mounting hole 111 (or 112) of a fully-enclosed container 100 having a flame-proof structure installed in a dangerous place. And an optical fiber 331 (or 332) from a photoelectric conversion part (not shown) of a central monitoring control device (not shown) that is mounted outside the socket body 101 (or 202) and installed in a non-hazardous area. ) Connected to the external connector 201 (or 202) and the internal connector 311 (or 312) that is attached to the inside of the socket body 101 (or 202) and connects the optical fiber 301 (or 302) in the totally closed container 100. ) And the optical fiber 301 (or 302) to the photoelectric converter 401 (or 402) of the terminal control circuit 500 housed in the fully closed container 100. It is the structure provided with the continuing terminal connector 321 (or 322).

A power supply circuit 600 that supplies power to the terminal control circuit 500 and the photoelectric converters 401 and 402 is housed in the fully closed container 100. Electric power is supplied to the power supply circuit 600 from the outside through a protective tube socket 700 that is mounted in the mounting hole 113 of the fully closed container 100 in a flameproof state.

Next, the operation of the conventional device based on the above configuration will be described. The socket body 101 is fixed to the mounting holes 111 and 112 of the fully closed container 100 in a pressure-proof and explosion-proof state. External connectors 201 and 202 connect one ends of the optical fibers inserted into the socket bodies 101 and 102 and the optical fibers 331 and 332 from the central monitoring and control device side. Further, the other ends of the optical fibers inserted into the socket bodies 101 and 102 are connected to the optical fibers 301 and 302 in the totally closed container 100 by internal connectors 311 and 312. Further, the optical fibers 301 and 302 are connected to the photoelectric converters 401 and 402 by terminal connectors 321 and 322, respectively.

The photoelectric converters 401 and 402 are connected to the terminal control circuit 500 by electric wiring. Electric wires from the power supply circuit 600 are connected to the photoelectric converters 401 and 402 and the terminal control circuit 500, and power is supplied. After being assembled in this way, power is supplied from the outside of the fully closed container 100 to activate the terminal control circuit 500, and in this state, an optical signal is input from the central supervisory control device via the optical fiber 331. . This optical signal is input to the photoelectric converter 401 via the optical fiber 331, the external connector 201, the optical fiber (not shown) in the socket body 101, the internal connector 311, the optical fiber 301 and the terminal connector 321. The electric signal converted by the photoelectric converter 401 is input to the terminal control circuit 500, and the terminal control circuit 500 executes an arithmetic operation based on the electric signal.

Further, the electric signal as the calculation result of the terminal control device circuit 500 is input to the photoelectric converter 402, converted into an optical signal by the photoelectric converter 402, and the terminal connector 322, the optical fiber 302, and the internal connector 312. , The socket body 102, the external connector 202, and the optical fiber 332 to the central monitoring and control device.

[0008]

[Problems to be solved by the device]

 Since the conventional pressure-resistant explosion-proof optical repeater is configured as described above, the optical signal in the optical fiber in the fully closed container 100 is attenuated at the connection portion, and the terminal control circuit 500 reads the optical signal. , Had the problem that it became impossible to recognize. In addition, there is a problem that the mounting and assembling work becomes complicated when the number of connecting portions of the optical fiber in the fully closed container 100 increases.

The present invention has been made in order to solve the above-mentioned problems, and it is an explosion-proof optical repeater that suppresses the attenuation of an optical signal as much as possible in a fully closed container with a pressure-proof explosion-proof structure and is simple and easy to install. The purpose is to provide.

[0010]

[Means for Solving the Problems]

 The flameproof explosion-proof optical repeater according to the present invention is installed in a hazardous area and is housed in a flameproof explosion-proof structure of a fully enclosed container. In a flameproof explosion-proof optical repeater that connects the photoelectric conversion section of the electric circuit outside the container installed at a location via an optical fiber, it is mounted in a flameproof state in a mounting hole that penetrates the side wall of the fully closed container and A socket body for inserting and supporting an optical fiber through an insertion hole formed through the center, an optical fiber mounted on the outer side of the insertion hole of the socket body and fixedly held in the center, and an electric circuit outside the container. The external connector part for connecting the optical fiber connected to the photoelectric conversion part, and one end fixedly held to the external connector part, and the other end is fully enclosed for a predetermined length from the inner part of the insertion hole of the socket body. Extend into the vessel A fiber portion, a resin-filled portion that is filled and sealed in the insertion hole of the socket body, and that firmly holds the optical fiber portion, and a photoelectric converter for an electric circuit in a container that is connected to the other end of the optical fiber portion that extends. And a terminal connector section to be connected to.

[0011]

[Action]

 In the present invention, the socket body is mounted in a pressure-proof explosion-proof fully closed container in a flameproof state, and the optical fiber is inserted into the socket body from one end to the other end, and from the other end to the fully closed container. By extending the optical fiber by a specified length and connecting the terminal connector to the end of this extended optical fiber, the optical fiber from the outside is connected to one end of the optical fiber in the socket body. It is also possible to connect the terminal connector to the photoelectric converter inside the fully closed container, which allows the optical signal from the outside to be propagated to the fully closed container without being attenuated, and the assembly and installation work inside the fully closed container is simplified. Can be transformed.

[0012]

【Example】

 (One Embodiment of the Present Invention) One embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a detailed partial cross-sectional view of the flameproof explosion-proof optical repeater of the present embodiment, and FIG. 2 is an explanatory view of a mounting mode of the flameproof explosion-proof optical relay of the present embodiment.

In each of the drawings, the flameproof explosion-proof optical repeater according to the present embodiment is a socket body that is mounted in a flameproof state in a mounting hole 111 that penetrates a side wall of a fully closed container 100 formed of a flameproof structure. 1 (11, 12) and the light that is attached to the outside of the insertion hole 10 (111, 112) formed by penetrating substantially the center of the socket body 1 (11, 12) and fixedly held in the center. The external connector 2 (21, 22) for connecting the fiber 3 (31, 32) and the optical fibers 33, 34 maintained in the photoelectric conversion unit (not shown) on the side of the central monitoring and control device, and the external connector 2 ( 21 and 22), one end of which is fixedly held, and which extends from the inner side of the insertion hole 10 of the socket body 1 (11, 12) into the fully closed container 100 for a predetermined length 3 (31, 32). And the socket body The epoxy resin is filled and sealed in the insertion hole 10 of the optical fiber 3 (31, 32) and the resin-filled portion 4 for fixing and holding the optical fiber 3 (31, 32). The terminal connector 5 (51, 52) is connected to the end and connects the optical fiber 3 (31, 32) to the photoelectric converter 401 (or 402) of the terminal control circuit 500.

The terminal control circuit 500 is housed in the fully closed container 100, and power is supplied from the power supply circuit 600. Electric power is supplied to the power supply circuit 600 through a protective tube socket 700 that is mounted in a mounting hole 113 of the fully closed container 100 in a pressure and explosion proof state, and like the terminal control circuit 500, predetermined power is supplied to the photoelectric converters 401 and 402. It is a structure that supplies electric power.

Next, the operation of this embodiment based on the above configuration will be described. First, the terminal connectors 51, 52 and the optical fibers 31, 32 are inserted into the fully closed container 100 from the outside in the mounting holes 111, 112 of the fully closed container 100, and the socket bodies 11, 12 are mounted. The socket bodies 11 and 12 are pressure-resistant by screwing the screw holes 1a and 1b and the screw holes 100a and 100b of the fully closed container with the screws 8a and 8b in a state of being mounted in the mounting holes 111 and 112. Fixed in explosion-proof condition. Further, the terminal connectors 51 and 52 are connected to the photoelectric converters 401 and 402 by holding and fixing them.

Further, in the operation of transmitting and receiving the optical signal in the present embodiment, as in the conventional device, power is supplied from the outside of the fully closed container 100 to activate the terminal control circuit 500, and in this state, the central supervisory control device. The optical signal is input from the optical fiber 311 through the optical fiber 311. This optical signal is input to the photoelectric converter 40 1 via the optical fiber 33, the external connector 21, the optical fiber (not shown) in the socket body 11, the optical fiber 31 and the terminal socket 51. The electric signal converted by the photoelectric converter 401 is input to the terminal control circuit 500, and the terminal control circuit 500 executes an arithmetic operation based on the electric signal.

Further, the electric signal of the operation result of the terminal control device circuit 500 is input to the photoelectric converter 402, converted into an optical signal by the photoelectric converter 402, and the terminal connector 52, the optical fiber 32, and the socket body 12 are converted. , Through the external connector 22 and the optical fiber 34 to the central supervisory controller.

Other Embodiments of the Present Invention A flameproof explosion-proof optical repeater according to another embodiment will be described with reference to FIGS. 3 and 4. FIG. 3 is a partially attached state explanatory view of another embodiment, and FIG. 4 is a partial sectional detailed view of another embodiment. In each of the drawings, the flameproof explosion-proof optical repeater according to the present embodiment has a single socket body 10 in which the two socket bodies 21 and 22 in the embodiment shown in FIG. 2 are integrally connected. The socket body 10 is fixed in a pressure-proof and explosion-proof state by screwing the screws 8a and 8b into the mounting holes 111 and 112 of the fully closed container 100.

In this socket body 10, for example, a ferrule 14 made of zirconia holds a core wire at one end of the optical fibers 31 and 32 in a central through hole, and a resin formed on the outer periphery of the central portion of the through hole. The optical fiber 31, 32 is fixed by filling and sealing the filling portion 4 with an epoxy resin. The optical fibers 31 and 32 are each extended by a predetermined length as in the embodiment shown in FIG. 2, and a terminal connector (not shown) is connected to the extended distal end.

The ferrule 14 is a ready-made product and is provided only on the outer end of the socket body 10, and need not be provided on the inner end. Therefore, conventionally, it was necessary to provide the ferrules 14 at both ends of the fully closed container 100 for centering, but in this embodiment, since the ferrules 14 can be composed of a single ferrule 14, a ferrule 14 of a predetermined length specially manufactured is required. Instead, ready-made products can be used. Further, the outer ends of the through holes of the socket body 10 are engaged with external connectors 23 and 24, for example, brass receptacles, and the external connectors 23 and 24 allow the optical fibers from the outside to enter the optical fibers 31 and 32. Configured to connect.

Further, the Kevlar fixing rings 41, 43 are engaged with the inner end of the through hole of the socket body 10, and the optical fibers 31, 32 penetrating the Kevlar solid rings 41, 43 are fixed by the caulking rings 42, 44. This is the configuration. In this way, the two optical fibers 31 and 32 can be fixedly attached to the fully closed container 100 with the single socket body 10, so that the attaching work can be further simplified.

[0022]

[Effect of device]

 As described above, in the present invention, the socket body is mounted in a pressure-proof and explosion-proof structure in a completely closed container, and the optical fiber is inserted into the socket body from one end to the other end, and the other end is inserted. Since the optical fiber is extended from the container to the specified length in the container and the terminal connector is connected to the end of this extended optical fiber, one end of the optical fiber in the socket body is connected. This means that an optical fiber from the outside can be connected to the terminal connector and the terminal connector can be connected to the photoelectric transformation section in the fully closed container, and the optical signal from the outside can be propagated into the fully closed container without being attenuated and This has the effect of simplifying assembly and installation work.

[Brief description of drawings]

FIG. 1 is a detailed partial cross-sectional view of an explosion-proof optical repeater according to an embodiment of the present invention.

FIG. 2 is an explanatory view of a mounting mode of a flameproof optical repeater according to an embodiment of the present invention.

FIG. 3 is an explanatory view of a partially mounted state of the explosion-proof optical repeater according to an embodiment of the present invention.

FIG. 4 is a detailed partial cross-sectional view of an explosion-proof optical repeater according to an embodiment of the present invention.

FIG. 5 is an explanatory view of a mounting mode of a conventional pressure-resistant explosion-proof optical repeater.

[Explanation of symbols]

1, 10, 11, 12, 101, 102 Socket body 2, 21, 22, 23, 24, 201, 202 External connector 3, 31, 32, 33, 34, 301, 302 Optical fiber 4 Resin filling part 100 Fully closed Inside container 5, 51, 52 Terminal connector 311, 312 Internal connector 401, 402 Photoelectric converter 500 Terminal control circuit 600 Power supply circuit

Front Page Continuation (72) Creator Toshiaki Eguchi 6-18-12 Megurohonmachi, Meguro-ku, Tokyo Honda Tsushin Kogyo Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A photoelectric converter for an electric circuit inside a container which is installed in a hazardous area and is housed in a pressure-proof explosion-proof fully closed container, and an outside of the container which is installed in a dangerous place or a non-hazardous place outside the fully closed container. In a flameproof explosion-proof optical repeater for connecting a photoelectric conversion part of an electric circuit through an optical fiber, the flameproof explosion-proof optical repeater is mounted in a mounting hole penetrating a side wall of the fully closed container in a flameproof manner, and is formed through substantially the center. A socket body that inserts and supports an optical fiber into the insertion hole, and an optical fiber that is attached to the outside of the insertion hole of the socket body and is fixedly held in the center and the photoelectric conversion unit of the electric circuit outside the container. And an optical fiber whose one end is fixedly held by the external connector part and whose other end extends from the inner part of the insertion hole of the socket body into the fully closed container for a predetermined length. Part and the socket A resin-filled part that is filled and sealed in the insertion hole of the main body to fix and hold the optical fiber part, and a terminal connector that is connected to the other end of the extending optical fiber part and is connected to the photoelectric converter of the electric circuit in the container. Explosion-proof optical repeater characterized by comprising: