JPH0718373U - Environment-resistant connector for reactor level gauge - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an environment-resistant connector for a reactor liquid level gauge that can simplify the structure, reduce the size and weight, and enable electrical connection regardless of the type of connection cable. thing. [Structure] In an environment-resistant connector for a reactor liquid level gauge, which is used for connection between cables for transmitting a signal of a liquid level gauge installed in a reactor to a measuring facility, a collet portion 11 having a pin / socket contact , 21 and the collet part 11,
As two bodies 10 and 20 composed of cover portions 12 and 22 for covering 21, a contact connection nut 30 for connecting and fixing the bodies 10 and 20, and a seal nut attached to the cable connection side of the bodies 10 and 20. The metal sheath seal nut 13 and the cable seal nut 53 are provided, and the same type or different types of connection of the metal sheath cable 41 and the special thin cable 43 can be made possible by selecting the nut of the seal portion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cable connection structure having environmental resistance after an accident of a nuclear reactor used in a liquid level gauge for a nuclear reactor, and in particular, a metal sheath cable and a special small diameter cable of the same type and different types of cables. It relates to an environment-resistant connector for a reactor liquid level gauge that can be connected.

[0002]

[Prior art]

 In the environment-resistant connector for liquid level gauge of the reactor, which is used for the connection between the cables that transmit the signals of the level gauge installed in the reactor to the measuring equipment, the water resistance, steam environment, and air condition Excellent things are required. As shown in Fig. 4, the conventional environment-resistant connector for a reactor liquid level gauge has a metal sheath cable at one end and a special thin cable at the other end. In the figure, 1 is a first body, 2 is a pin contact, 3 is a metal sheath cable, 4 is a second body, 5 is a socket contact, and 6 is a special small diameter cable.

However, in this type of structure, the metal sheath cable and the special small diameter cable can be connected, but the connection between the metal sheath cables or the special small diameter cables needs to be designed in a different structure. there were. In addition, the structure is complicated (some parts require welding), and the cable diameter is large, so the connector is large and there are problems in handling and installation space.

[0004]

[Problems to be solved by the device]

 As described above, the conventional environment-resistant connector for a reactor liquid level gauge has the following problems. (1) The structure is complicated as shown in Fig. 4, and some parts require welded seals. (2) Since the cable diameter is large, it is necessary to enlarge the connector itself, and the load of the connector and the cable is applied to the metal sheath cable, which may damage the metal sheath. Also, it is very disadvantageous in terms of handling and installation space. (3) The conventional product is used to connect a metal sheath cable at one end and a special thin cable at the other end, but a separate design and structure is required for connecting metal sheath cables or special thin cables. There is. In other words, three types of structures were needed.

The present invention has been made in view of the above circumstances, and an object thereof is to simplify the structure, reduce the size, and reduce the weight, and to perform the electrical connection regardless of the type of the connection cable. It is to provide an environment-resistant connector for a reactor liquid level gauge that is made possible.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention employs the following configurations. That is, the present invention is an environment-resistant connector for a reactor liquid level gauge that is used for connection between cables that transmit signals from a liquid level gauge installed in a nuclear reactor to measuring equipment. From the collet that has the connection part of the cable or the special small diameter cable and the contact part (pin contact and socket contact) that is electrically connected to these cables on the other end side, from the cover part that covers the collet. The first and second bodies, the contact connecting nut for connecting and fixing the first and second bodies, and the seal nut attached to the cable connecting side of the first and second bodies, A metal sheath seal nut that seals between the collet and the cover, or seals between the collet and the cover and seals between one end of the collet and the special small diameter cable. A cable seal nut is provided, and by selecting a cable to connect to the first and second bodies and a nut of the seal portion, metal sheath cables, metal sheath cables and special small diameter cables, special small diameter cables It is characterized by enabling three types of connections between each other.

[0007]

According to the present invention, the body is composed of the collet portion having the pin contact and the socket contact and the cover portion covering the collet portion, and the metal sheath cable and the special reproduction cable are selectively connected by the two kinds of seal portion nuts. It is possible. Therefore, by combining with cable thinning, three configurations of metal sheathed cables, one end metal sheathed cable, one end reduced diameter cable or both ends reduced diameter cable can be achieved by exchanging parts of the sheath nut. It is possible and multi-functionalized. In other words, it is possible to expand the range of adoption of the same parts and reduce the size of handheld parts.

[0008] Furthermore, a collet portion in which the pin contact and the socket contact are made of metal and insulating resin, and a surrounding portion (a metal sheath seal nut for sealing the cover portion and the collet portion, a cable seal nut, a contact connection nut, etc.) By completely separating the functions into and, the disassembly becomes easy and the structure is simplified, and the cover can be reused only by replacing the cover. Furthermore, by making the diameter of the cable smaller, the contact can be made smaller and lighter, the load generated on the metal sheath cable side can be made smaller, and the reliability can be improved.

[0009]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a schematic configuration of an environment-resistant connector for a reactor liquid level gauge according to an embodiment of the present invention, showing an example of connecting metal sheath cables. The first body 10 to which the metal sheath cable 41 is connected and the second body 20 to which the metal sheath cable 42 is connected are connected by the contact connection nut 30.

The first body 10 is configured by inserting the collet portion 11 shown in FIG. 2 into the cover portion 12, and the collet portion 11 is fixed by a metal sheath seal nut 13. At this time, the O-ring 13 and the sleeve 14 seal the outside. As shown in FIG. 2, the collet portion 11 is composed of a pin contact 11a, a socket contact 11b, a metal source 11c and an insulating resin 11d. The cable lead 41 is connected to the pin inside the collet portion 11 and the insulating resin injection port 11e is formed. It is formed by injecting epoxy resin from. .

Like the first body 10, the second body 20 is also configured by inserting the collet portion 21 into the cover portion 22, and the collet portion 21 is fixed by the metal sheath seal nut 23. At this time, the O-ring 23 and the sleeve 24 seal the outside. The configuration of the collet portion 21 is similar to that of the collet portion 11. The first and second bodies 10 and 20 are sealed by being rotated by the contact connection nut 30 via the O-ring 31. Further, the pin contacts of the collet parts 11 and 21 and the socket contacts are also joined by rotation of the connected nut.

FIG. 3 shows a connection example in the case of the one-end metal sheath cable 41 and the one-end special thin diameter cable 43. The cable seal nut 53 has a seal ring 54 inserted between the collet metal end and the cable seal nut 53 as a sleeve. It has a mechanism that tightens the nuts via 55, and seals the cable from the outside world.

Although not shown in the figure, by replacing not only the metal sheath seal nut 23 but also the metal sheath seal nut 13 with the cable seal nut 53, it is also used as a connector for connecting special small-diameter cables. It is possible.

As described above, according to this embodiment, the combination of the cable diameter reduction and the replacement of the nut of the seal portion allows the metal sheath cables, the metal sheath cable and the special diameter cable, and the special diameter cables to be combined with each other. Different types of connections can be made, and the range of adoption and the size of handheld parts can be reduced. Moreover, since this connector is completely sealed from the external environment by the O-ring, it is possible to prevent the electrical insulation from being deteriorated sufficiently even in the case of environmental deterioration such as a nuclear reactor accident. In other words, the electrical connection function of the connector is completely separated from the environment to the seal structure, and electrical connection is possible regardless of the type of connection cable.

Further, by separating the collet part and the cover part, the disassembly is facilitated and the structure is simplified, and the connector of the current integrated replacement enables reuse of only the cover part. In addition, the reduction in size and weight makes it possible to solve the mounting space problem and improve reliability. It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be carried out without departing from the scope of the invention.

[0016]

[Effect of device]

 As described above, according to the present invention, a body including a collet portion having a contact and a cover portion for covering the collet portion is formed, and a metal sheath cable or a special small-diameter cable is connected by replacing a seal nut. By making it possible, the structure can be simplified, the size and weight can be reduced, and an environment-resistant connector for reactor liquid level gauge that enables electrical connection regardless of the type of connection cable can be realized. You can

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a schematic configuration of an environment-resistant connector for a reactor liquid level gauge according to an embodiment of the present invention, showing an example of connection between metal sheath cables.

FIG. 2 is a cross-sectional view showing details of a collet portion used in an example.

FIG. 3 is a sectional view showing a schematic configuration of an environment-resistant connector for a reactor liquid level gauge according to an embodiment of the present invention, showing a connection example of a metal sheath cable and a special small diameter cable.

FIG. 4 is a sectional view showing a schematic configuration of a conventional environment-resistant connector.

[Explanation of symbols]

10, 20 ... Body 11, 21 ... Collet part 11a ... Pin contact 11b ... Socket contact 11c ... Metal sheath 11d ... Insulating resin 11e ... Epoxy resin 12, 22 ... Cover part 13, 23 ... Metal sheath seal nut 14, 24, 3
1 ... O-ring 15, 25, 55 ... Sleeve 30 ... Contact connection nut 41, 42 ... Metal sheath cable 43 ... Special small diameter cable 53 ... Cable seal nut 54 ... Seal ring

Claims (1)

[Scope of utility model registration request] 1. An environment-resistant connector for a reactor liquid level gauge, which is used for connection between cables for transmitting a signal of a liquid level gauge installed in a nuclear reactor to a measuring facility, wherein a metal sheath cable or A collet part having a connection part for the special small-diameter cable and having a contact electrically connected to these cables on the other end side, first and second bodies made of a cover part for covering the collet part, A contact connection nut for connecting and fixing the first and second bodies, and a metal sheath seal for sealing between the collet portion and the cover portion as a seal nut attached to the cable connection side of the first and second bodies. A nut, and a cable seal nut that seals between the collet portion and the cover portion and seals between the one end side of the collet portion and the special small-diameter cable, By selecting the cables and seal nuts to be connected to the first and second bodies, it has become possible to connect three types of metal sheath cables, metal sheath cables and special small diameter cables, and special small diameter cables. Environment-resistant connector for reactor liquid level gauge.