JPS6139381A - One touch type sealing connector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a one-touch method for connecting a metal tube-coated insulated wire cable (hereinafter referred to as Ml cable) and a soft wire cable, which is mainly used in a neutron detector in a nuclear reactor. Regarding seal connectors.

[Technical background of the invention] Large nuclear reactors, such as 1.1 million KW class boiling water reactors (
(hereinafter simply referred to as a nuclear reactor).

Over 100 neutron detectors are installed in the reactor core for power range monitoring and safety protection of the reactor's output status.

The outputs of these neutron detectors are led to the central control room and measured there via a soft wire cable coaxially connected to the M1 cable connected to the neutron detector via a connector. Conventionally, the connector is a pair of connections in which pins and jacks fixed to the conductor terminals of the M1 cable and the soft electric wire cable are fitted together on a coaxial line, and are attached to the outer periphery of the terminal portion of the MI cable and the soft electric wire cable. A simple structure for connecting metal fittings has been used, but since the reactor temperature is 70 to 80°C and atmospheric pressure, there are no problems with its use.

[Problems in the Background Art] Conventional connectors for neutron detectors are as described above, but if an accident such as a leakage of cooling water occurs in the core cooling system of a nuclear reactor, the connector will be damaged at a temperature of 170 to 180°C and an atmospheric pressure. It is expected that they will be exposed to as much as 4-5a of water vapor. At this time, with conventional connectors, water vapor enters the connector and reduces the insulation resistance of the electric wire cable inside the connector, which not only causes erroneous measurements of the output of the neutron detector, but also makes the neutron detector itself unusable. There is a risk.

However, even if any accident occurs, it is necessary to accurately monitor the status of the reactor, and in particular, to ensure that the neutron detectors in the power range of over 100 installed in the reactor core function reliably. It is strongly desired that you do so.

[Purpose of the Invention] This invention was made to solve the above-mentioned problems of the conventional neutron detector connector in the event of a nuclear reactor core accident, and the electric wire cable contained in the connector can be used even under high temperature and high pressure atmospheres. The purpose of the present invention is to provide a one-touch sealed connector which can be used without reducing the insulation resistance of the neutron detector, thereby improving the reliability of the neutron detector, and which can be connected with one touch and is useful for reducing radiation exposure.

[Summary of the Invention] A one-touch seal connector according to the present invention includes: a pin connector attached to either one of an MI cable or a soft electric wire cable; a jack connector attached to the other of the soft electric wire cable or the MI cable; It is equipped with a lock case that can connect a pin connector and a jack connector with one touch, and a pin-side sealing structure is provided between the pin connector and the outer periphery of one of the wire cables into which the pin connector is inserted and fixed thereto. A jack-side sealing structure is provided between the outer peripheries of either of the other electric wire cables that are inserted into the cable and fixed thereto, and a connection sealing structure is provided between the end surfaces of the pin connector and the jack connector that face each other when they are connected. When the pin connector and jack connector are combined via the lock case to form an integrated seal connector, M located in the seal connector by the pin side seal structure, jack side seal structure, and connection seal structure.
The above object is achieved by configuring the terminal portions of the I cable and the soft electric wire cable to be sealed from the outside atmosphere.

[Embodiment of the Invention] An embodiment of the invention will be described with reference to FIGS. 1 and 2.

The one-touch sealed connector according to the present invention includes a pin connector 10 attached to an Ml cable 1, and a jack-connector 2 attached to a soft wire cable 4.
0, a lock case 30 that connects the pin connector 10 and the jack connector 20, and a connection sealing structure 40 that is sandwiched between the pin connector 10 and the jack connector 20.

The M1 cable 1 directly connected to a neutron detector (not shown) is a wire cable filled with inorganic insulation between a central conductor and a metal tube concentrically surrounding it, and the exposed conductor terminal 2 A pin 3 is fixed on the coaxial line.

The pin connector 10 includes a pin insulating tube 11, a pin connector case 12, and a pin-side seal structure 14. The pin insulating tube 11 is made of a polyethylene cylinder, and is inserted and fixed concentrically to the inner periphery of one end of the cylindrical pin connector case 12, and then inserted and fixed concentrically to the outer periphery of the pin 3 on the inner periphery. There is. The pin connector case 12 has a tapered hole 12a formed in the center of one end thereof, a screw 12b provided on the outer periphery of the one end, and an M-cable 1 inserted through and fixed in the center of the one end. The pin-side nut member 15, which is a stepped cylindrical body, is inserted concentrically into the M1 cable 1 at its inner circumference at one end, and is tightened into the screw 12b of the pin connector case 12 via a female thread provided at the inner circumference at the other end. . The large surface of the tapered hole 12a and the pin side nut member 15
An annular conical metal seal 16 and an annular hack seal member 17 are provided on the outer periphery of the M1 cable l between the internal end face of the
are superimposed in the axial direction and sandwiched concentrically. The metal seal 16, the back seal member 17, and the pin-side nut member 15 constitute the pin-side seal structure 14. By sufficiently tightening the pin-side nut member 15, the fitting portion between the Ml cable 1 and the pin connector case 12 is sealed by the pin-side sealing structure 14.

The soft electric wire cable 4 is a flexible ordinary electric wire cable in which the outer periphery of the central conductor is covered with an insulating material, and the exposed conductor terminal 5 has a jack 6 on the coaxial line into which a pin 3 can be inserted and removed. It is fixed. The other long end of the soft wire cable 4 is led to a central control room (not shown). Since the soft electric wire cable 4 has a soft outer peripheral surface and is easily deformed, a sleeve 7 is fitted and fixed on the outer periphery of the end portion where the jack connector 20 is attached, and a shielded wire tube 8 is further inserted into the outer periphery of the sleeve 7. The protection tube 9 is fitted and fixed concentrically.

The jack connector 20 includes a jack disconnection tube 21, a jack connector case 22, and a jack side seal structure 24.
It consists of The jack insulating cylinder 21 is made of a polyethylene cylinder, and is inserted and fixed concentrically to the inner periphery of one end of the cylindrical jack connector case 22, and then inserted and fixed concentrically to the outer periphery of the jack 6 at the inner periphery. There is. The jack connector case 22 has a tapered hole 22a at the center of one end and a thread 22b at the outer periphery, and the soft electric wire cable 4 is inserted into the center of the one end via a protection tube 9, a shielded wire tube 8, and a sleeve 7. It is fixed. An annular groove 22c is concentrically formed in the outer periphery of the axially intermediate portion of the jack connector case 22, and a circlip 23 is removably fitted into the annular groove 22c. The jack-side nut member 25 has a stepped cylindrical body, and is inserted concentrically into the protective tube 9 at the inner periphery of one end, and is connected to the thread 2 of the jack connector case 22 via a female thread provided at the inner periphery of the other end.
It is tightened to 2b. Between the large surface of the tapered hole 22a and the inner end surface of the jack-side nut member 25, on the outer periphery of the protection tube 9, an annular conical metal seal 26 and an annular back seal member 27 are arranged concentrically and overlapping in the axial direction. is sandwiched between. The metal seal 26, the back seal member 27, and the jack-side nut member 25 constitute the jack-side seal structure 24. By sufficiently tightening the jack side nut member 25, the fitting part with the protection tube 9 and the soft electric wire cable 4, which is airtightly fixed to the protection tube 9 via the shielded wire tube 8 sleeve 7, becomes a jack side seal. It is sealed by the structure 24.

The cylindrical lock case 30 has an annular groove 3 on the inner periphery of one end thereof.
0a is concentrically recessed, and the other end is provided with an L-shaped engagement groove 30b that extends from the axial direction to the circumferential direction. The inner periphery of one end of the lock case 30 fits into the outer periphery of the annular groove 22c of the jack connector case 22, and the outer half of the circlip 23 fits into the annular groove 30a. It is mounted in a fixed position so as to be rotatable about the central axis. The lock case 30 has an inner periphery of the other end that can be fitted into the outer periphery of one end of the pin connector case 12, and when the lock case 30 is fitted into the pin connector case 12, it is implanted to protrude at right angles to the outer periphery of the pin connector case 2. The locked lock pin 13 can be engaged with the engagement groove 30b by rotating the lock case 30 by an appropriate angle.

The outer periphery of the -° end of the jack connector case 22 has an annular groove 2.
A metal seal having a diameter smaller than the outer circumference of the lock case 30 and having a wedge-shaped cross section is provided on the outer circumference of the upper diameter portion of the stepped portion formed thereon. One pair of two O-rings 42 are inserted concentrically with the ring 41 and the metal seal ring 41 sandwiched from both sides, and the connection seal structure 4 is inserted.
It constitutes 0. The connection seal structure 40 connects the pin connector 10 and the jack connector 20 as described later.
When connected on the coaxial line, the pin connector case 12
It is located between the opposing end surfaces of the jack connector case 22 and the jack connector case 22, so that the space between them can be sealed. A viewing window 30c is provided on the peripheral wall of the lock case 300 to check the state of the connection seal structure 40.

In order to combine the pin connector 10 and jack connector 20 configured as described above to form an integrated sealed connector, first, the pin connector case 12 and the lock case 30 are aligned, and the lock pin 13 and the engagement groove are aligned. Visually align the position with 30b. Next, when the pin connector 10 is pushed into the jack connector 20 as a whole, the pin 3 is inserted into the jack 6 and the MI cable l and the soft wire cable 4 are inserted.
are coaxially connected to each other, and the lock pin 13 is connected to the engagement groove 30.
b and insert the metal seal ring 41 between them.
The O-rings 42 are pressed against opposing end surfaces of the pin connector case 12 and jack connector case 22, and the insides of the pin connector case 12 and jack connector case 22 are sealed from the outside. In this state, by rotating the lock case 3o, the lock case 30 rotates while the circumferential portion of the engagement groove 30b is engaged with the lock pin 13, and the end of the circumferential portion of the engagement groove 30b is rotated. As a result, the pin connector case 12 and jack connector case 22 are locked, and the pin connector 10 and jack connector 20 are connected. From the above description, it is clear that this connection, including alignment, can be performed extremely simply and easily with one touch. When the pin connector 10 and the jack connector 20 are connected, the inside of the pin connector 10 and the jack connector 20 to which the M1 cable l and the soft wire cable 4 are fixed, respectively, includes a connection seal structure 40 and a pin side seal structure. 14. The jack side sealing structure 24 seals the jack side from the outside atmosphere, and if necessary, the pin side nut member 15 and the jack side nut member 25 are retightened to increase airtightness.

[Effects of the Invention] The one-touch sealed connector according to the present invention includes a pin connector attached to either the M1 cable or the soft wire cable, a jack connector attached to the other of them, and a pin connector and a jack connector. a lock case that can be connected with one touch; a pin-side sealing structure is provided between the pin connector and the outer periphery of the one of the wire cables to which it is attached; and the jack connector and the other wire to which it is attached are provided. A jack-side sealing structure is provided between the outer circumference of the cable, and a connection sealing structure is provided between the end faces that face each other when the pin connector and jack connector are connected, so that the lock case can close the pin connector and jack connector with one touch. When the pin connector and jack connector are connected via the lock case, the electric wire cable located in the pin connector jack connector can be connected to the pin side sealing structure, the jack Since the side seal structure and the connection seal structure are isolated from the outside atmosphere, even if an accident occurs in the reactor and the connector is exposed to water vapor at a higher temperature and pressure than normal, it will not work like a conventional connector. This prevents this water vapor from entering the connector and lowering the insulation resistance of the electric wire cable inside the connector, resulting in incorrect measurements by the neutron detector to which this connector is connected, making the neutron detector unusable. This has the effect of improving the reliability of neutron detectors, and since pin connectors and jack connectors can be connected extremely easily and quickly using the lock case, it has the effect of reducing radiation exposure for workers who connect the connectors. be.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a one-touch seal connector according to the present invention, and FIG. 2 is a front view of the lock case 30 of FIG. 1. 1...Metal tube coated insulated wire cable, 3...Pin,
4... Soft electric wire cable, 6... Jack, 1o
...pin connector, 12...pin connector case,
13...Lock pin, 14...Pin side seal structure, 2゜...Jack connector, 22...Jack connector case, 24...Jack side seal structure, 3
0...Lock case, 30b...Engagement groove (engagement part)
, 40... Connection seal structure. (7317) Agent Patent attorney Kensuke Norichika (and 1 other person)

Claims (1)

[Claims] A metal tube-coated insulated wire cable and a soft wire cable, each of which is equipped with a pin connector, a jack connector, and a lock case, are connected through a pin fixed to one of the conductor terminals and a jack fixed to the other conductor terminal. In one-touch sealed connectors that are removably connected on a coaxial line, each of the pin connector and jack connector has a plurality of cylindrical bodies including connector cases concentrically stacked on the inside and outside and in the axial direction, In the case of a pin connector, the electric wire cable to which the pin is fixed is inserted through the axial center of the pin connector and fixed to the axial center, and in the case of the jack connector, the jack is inserted with the axial center of the terminal as the terminal. The fixed electric wire cable is inserted through and fixed to the shaft center portion, and the lock case has a cylindrical shape and one end thereof is attached to a fixed position on the outer periphery of either the pin connector or the jack connector. The other end has an engaging part that locks the lock case on the other of the jack connector and the pin connector with a single touch, and when the pin connector and jack connector are placed facing each other on a coaxial line, An annular connection sealing structure is inserted between the end faces of the pin connector and the jack connector that face each other, and an annular pin-side sealing structure is installed between the pin connector and the outer periphery of the electric wire cable that passes through it, and the jack connector and an annular jack-side sealing structure is installed between the outer periphery of the electric wire cable that is inserted therein, and the pin and the jack are coupled, and the pin connector and the jack connector are coupled via the lock case to form an integrated structure. When the connector becomes the sealed connector, the connecting portion sealing structure, the pin side sealing structure, and the jack side sealing structure are configured to seal the electric wire cable in the sealed connector from the external atmosphere. One-touch seal connector.