Soft and hard cable connector applied to high-temperature irradiation environment in nuclear power field

Abstract

The invention discloses a soft and hard cable connector applied to a high-temperature irradiation environment in the nuclear power field. The soft and hard cable connector comprises a tubular front shell, a female needle is arranged in the front shell along the axial direction; a packaging body is filled between the front shell and the female pin; the front end of the female pin is provided with a jack connected with a hard cable, the rear end of the female pin is provided with a cold-pressed joint connected with a flexible cable, and the cold-pressed joint extends out of the rear end of the front shell; a plugging section is arranged between the jack on the female needle and the cold press; a tubular shielding tail clamp is arranged outside the cold pressing joint; according to the invention, electrical connection between the jack and the cold-pressed joint is realized by using the female pin with the plugging section in the middle, and packaging between the front shell and the female pin is realized through the packaging body, so that the air tightness of the connector and the cable joint after connection can be ensured, high and low pressure environments can be isolated, and the service life of the connector is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of cable connectors, and in particular relates to a hard and soft cable connector used in a high-temperature radiation environment in the nuclear power field. Background Art

[0002] Cable intermediate joints are an important part of connecting cables, and their quality directly affects the safe and reliable operation of the system in the store. Cable connections for nuclear power plants are usually made by cold-pressed joints, but due to the special environment, they need to have properties such as heat resistance and radiation resistance.

[0003] With the development of technology, some cable connectors have also appeared. However, the existing connectors used for nuclear power plant cable connections are used for connecting hard cables and hard cables and soft cables and soft cables. When used for connecting soft cables and hard cables, there are usually airtightness problems, which greatly reduces the service life of the connector. Summary of the invention

[0004] The purpose of the present invention is to provide a soft and hard cable connector for use in a high-temperature irradiation environment in the nuclear power field, thereby improving the air tightness of the connection and increasing the service life.

[0005] The present invention adopts the following technical solution: a flexible and rigid cable connector for use in a high-temperature irradiation environment in the nuclear power field, comprising a tubular front shell;

[0006] A female pin is arranged in the front shell along its axial direction;

[0007] A packaging body is filled between the front shell and the female pin;

[0008] The front end of the female needle has a socket connected to the hard cable, and the rear end of the female needle has a cold-pressed connector connected to the soft cable, and the cold-pressed connector extends out of the rear end of the front shell; the plugging section is between the socket on the female needle and the cold-pressed connector;

[0009] The outside of the cold-pressed connector is provided with a tubular shielding tail clip.

[0010] Furthermore, the rear section of the shielding tail clip is lined with a wire fixing sleeve.

[0011] Further, the front end inner wall of the shielding tail clip has a first internal thread section;

[0012] The rear end outer wall of the front shell has a first external thread section;

[0013] The shielding tail clip and the front shell are connected through a first internal thread section and a first external thread section.

[0014] Furthermore, the inner wall of the front shell has a protrusion in the axial direction.

[0015] Furthermore, a rear plugging plate is provided inside the front shell near the cold-pressed joint, and the front end surface of the rear plugging plate is fitted with the raised block.

[0016] Furthermore, a front blocking plate is provided at the front end of the front shell; through holes are provided at positions corresponding to the front blocking plate and the insertion hole.

[0017] The packaging body is filled between the front blocking plate and the rear blocking plate.

[0018] Furthermore, a front shell joint is sleeved on the outside of the front shell;

[0019] The front shell joint is tubular, and its rear end extends inwardly to form a ring body;

[0020] The front shell is provided with a convex edge on the outside, and the convex edge is arranged at the front part of the ring body;

[0021] There is a gap between the front shell and the front shell joint.

[0022] Furthermore, a tail clip cap is threadedly connected to the rear section of the shielding tail clip.

[0023] Furthermore, a crown spring is installed in the socket.

[0024] The beneficial effects of the present invention are as follows: the present invention realizes the electrical connection between the jack and the cold-pressed connector by using a female pin with a sealing section in the middle, and realizes the encapsulation between the front shell and the female pin by the encapsulation body, thereby ensuring the air tightness of the connector and the cable connector after the connection, isolating high and low pressure environments, and increasing the service life of the connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of a soft and hard cable connector used in a high-temperature radiation environment in the nuclear power field according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic cross-sectional structure diagram of a flexible and rigid cable connector used in a high-temperature radiation environment in the nuclear power field according to an embodiment of the present invention;

[0027] Figure 3 The present invention is a schematic diagram of the longitudinal cross-section structure of a hard and soft cable connector used in a high-temperature radiation environment in the nuclear power field according to an embodiment of the present invention.

[0028] Among them: 1. front shell joint; 2. front shell; 3. shielding tail clip; 4. tail clip cap; 5. wire fixing sleeve; 6. female needle; 7. packaging body; 8. crown spring. DETAILED DESCRIPTION

[0029] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Existing connectors are generally plug-in at both ends or plug-in at one end with a soldered wire at the other end. Connectors that plug-in at both ends require a matching joint at the flexible cable end, which is relatively expensive. In addition, the length of the flexible cable is generally determined on-site, and the matching joint needs to be made on-site. The process flow is complicated and difficult to implement. Connectors that plug-in at one end and solder a wire at the other end generally use tin soldering. Due to the melting point of solder, although this type of connector has a simple process, it cannot be used in high temperature environments.

[0031] The present invention discloses a soft and hard cable connector for use in a high temperature irradiation environment in the nuclear power field, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes a tubular front shell 2; a female pin 6 is arranged inside the front shell 2 along its axial direction; a packaging body 7 is filled between the front shell 2 and the female pin 6; the front end of the female pin 6 has a socket connected to a hard cable, and the rear end of the female pin 6 has a cold-pressed connector connected to a soft cable, and the cold-pressed connector extends out of the rear end of the front shell 2; a sealing section is provided between the socket on the female pin 6 and the cold press; a tubular shielding tail clip 3 is provided on the outside of the cold-pressed connector.

[0032] The present invention realizes the electrical connection between the jack and the cold-pressed connector by using a female pin 6 with a sealing section in the middle, and realizes the encapsulation between the front shell 2 and the female pin 6 by the encapsulation body 7, which can ensure the air tightness of the connector and the cable connector after the connection, and can isolate high and low pressure environments, thereby increasing the service life of the connector.

[0033] Specifically, a crown spring 8 is installed in the jack, and the crown spring jack is used to ensure that a stable electrical connection can be maintained even in harsh environments (such as high temperature, vibration, etc.), reducing signal attenuation and circuit break risks.

[0034] The number of the female pins 6 is usually designed to be two, but the number may be changed according to actual connection requirements.

[0035] The front shell joint 1, front shell 2, female needle 6, shielding tail clip 3, and tail clip cap 4 in the solution of the present invention are all made of inconl 600 (nickel-chromium-iron based solid solution strengthened alloy), the package body 7 is a glass sintered package body, and the crown spring is made of gold-plated brass. The above materials all meet the environmental adaptability requirements of corrosion resistance and high temperature resistance of 500°C.

[0036] In the embodiment of the present invention, the rear section of the shielding tail clip 3 is lined with a wire fixing sleeve 5, which is used to fix the two cables in the flexible cable. During the installation process, the outer periphery of the wire fixing sleeve 5 will be subjected to pressure from the tail clip cap 4. Although not shown in the figure, the actual situation is that the tail clip cap 4 presses the outer periphery of the wire fixing sleeve 5, so that the wire fixing sleeve 5 is tightened and locks the cable. At the same time, a boss is recessed inwardly on the inner wall of the shielding tail clip 3, and the boss will block the front end position of the wire fixing sleeve 5 to achieve the positioning of the wire fixing sleeve 5.

[0037] In addition, the overlapping part (tail part) of the shielding tail clip 3 and the tail clip cap 4 has a fitting plane, that is, the outer peripheral tail end of the shielding tail clip 3 has a plane, and the inner wall tail end of the tail clip cap 4 also has a plane. When the shielding tail clip 3 and the tail clip cap 4 are connected, the shielding layer of the flexible cable is stuffed between these two planes and locked, thereby ensuring the integrated shielding of the flexible and hard cable connectors and the flexible cable lines.

[0038] As a connection method, the front inner wall of the shielding tail clip 3 has a first internal thread section; the rear outer wall of the front shell 2 has a first external thread section; the shielding tail clip 3 and the front shell 2 are connected through the first internal thread section and the first external thread section. The threaded connection method can facilitate installation and maintenance and simplify the installation process.

[0039] There is an accommodating space in the middle of the shielding tail clip. This space is reserved for placing the cold-pressed terminal and the root of the soft cable. While ensuring the electromagnetic shielding performance, it prevents the root of the soft cable from exceeding the fixed wire sleeve, causing the root of the soft cable to break due to vibration and a small bending radius.

[0040] Regarding the glass packaging body, the inner wall of the front shell 2 has a protruding block in the axial direction, and a rear blocking plate is provided inside the front shell 2 near the cold-pressed joint, and the front end surface of the rear blocking plate is in contact with the protruding block; a front blocking plate is provided at the front end of the front shell 2; a through hole is provided at the position corresponding to the jack, and the packaging body 7 is filled between the front blocking plate and the rear blocking plate.

[0041] By adding a front blocking plate and a rear blocking plate, the design position of the glass package body 7 can be quantified, thereby improving airtightness and isolation.

[0042] The front shell 2 is provided with a front shell joint 1 on the outside; the front shell joint 1 is tubular, and its rear end extends inward to form a ring body; the front shell 2 is provided with a convex edge on the outside, and the convex edge is arranged at the front part of the ring body; there is a gap between the front shell 2 and the front shell joint 1. Through such an arrangement, the ring body of the front shell joint 1 can be restricted between the shielding tail clip 3 and the convex edge, ensuring that its installation position is fixed.

[0043] The function of the front shell joint 1 is similar to not loosening the nut, and the connection between the hard cable connector and the soft and hard cable connector is gradually locked by tightening the front shell joint 1. This installation method can effectively avoid the loss of the front shell joint 1, and at the same time make the disassembly and assembly of the connector more convenient.

[0044] The front shell joint 1 is used to connect the hard cable and the connector. The hard cable is installed on the hard cable connector. The hard cable connector has a pin corresponding to the female pin jack, and the outer periphery of the hard cable connector has an external thread, and the front shell joint 1 has an internal thread, and the two are connected by threads. In addition, an axial blind hole is opened at the front end of the front shell 1, and the hard cable connector has a boss that matches the blind hole. The axial positioning of the two is achieved through the blind hole and the boss to ensure accurate wiring.

[0045] In one embodiment, the rear section of the shielding tail clip 3 is threadedly connected with a tail clip cap 4, and the tail clip cap is used to lock the wire tail in cooperation with the wire fixing sleeve, and at the same time cooperate with the shielding tail clip to compress the shielding braided sleeve to increase the shielding reliability.

[0046] The connector is plugged into and tightened with the hard cable connector, and the soft cable connection adopts the cold pressing process. All parts of the connector are threaded, which simplifies the installation process and facilitates subsequent maintenance or replacement.

[0047] The soft and hard cable connector of the present invention is a high-performance connector specially designed to meet the electrical connection requirements in the nuclear power field and high-temperature and high-pressure environments. This product takes into account the flexibility of soft cables and the durability of hard cables. Through precise manufacturing processes and high-quality material selection, it ensures excellent electrical performance, mechanical strength and environmental adaptability. It is an important component for achieving stable connection between soft and hard cables and ensuring efficient and stable signal transmission.

[0048] Through the above design, the present invention can achieve the following technical indicators:

[0049] Working temperature range: -55℃~500℃. Relative humidity: 95%±4% at 40℃. Insulation performance: At room temperature, the insulation resistance between the pin and the shell, and between the pins is ≥500MΩ (100V / DC); at 500℃, the insulation resistance between the pin and the shell, and between the pins is ≥100KΩ (100V / DC). Impedance matching: 50Ω. Packaging process: glass sintering, packaging thickness 17mm. Airtight performance: The leakage rate at normal temperature (before high temperature) is not more than 1.33×10-9 / Pa·m3 / s; the leakage rate at high temperature (after 500℃ high temperature, restored to normal temperature measurement) is not more than 1.33×10-5 / Pa·m3 / s. Mechanical life: plugging and unplugging ≥500 times; Shell material: inconl600.

Claims

1. A soft and hard cable connector used in high temperature radiation environment in the nuclear power field, characterized in that: It includes a tubular front shell (2); A female needle (6) is provided in the front shell (2) along its axial direction; A packaging body (7) is filled between the front shell (2) and the female pin (6); The front end of the female needle (6) has a socket connected to a hard cable, and the rear end of the female needle (6) has a cold-pressed joint connected to a soft cable, and the cold-pressed joint extends out of the rear end of the front shell (2); a sealing section is provided between the socket on the female needle (6) and the cold-pressed joint; A tubular shielding tail clamp (3) is provided on the outside of the cold-pressed joint.

2. A soft and hard cable connector for use in a high temperature radiation environment in the nuclear power field as claimed in claim 1, characterized in that: The rear section of the shielding tail clip (3) is lined with a wire fixing sleeve (5).

3. A hard and soft cable connector for use in a high temperature radiation environment in the nuclear power field as claimed in claim 2, characterized in that: The front end inner wall of the shielding tail clip (3) has a first internal thread section; The rear end outer wall of the front shell (2) has a first external thread section; The shielding tail clip (3) and the front shell (2) are connected via a first internal thread section and a first external thread section.

4. A soft and hard cable connector for use in a high temperature radiation environment in the nuclear power field as claimed in claim 2 or 3, characterized in that: The inner wall of the front shell (2) has a protrusion in the axial direction.

5. A soft and hard cable connector for use in a high temperature radiation environment in the nuclear power field as claimed in claim 4, characterized in that: A rear blocking plate is provided inside the front shell (2) near the cold-pressed joint, and the front end surface of the rear blocking plate is in contact with the raised block.

6. A soft and hard cable connector for use in a high temperature radiation environment in the nuclear power field as claimed in claim 5, characterized in that: A front blocking plate is provided at the front end of the front shell (2); through holes are provided at positions of the front blocking plate corresponding to the insertion holes. The packaging body (7) is filled between the front blocking plate and the rear blocking plate.

7. A hard and soft cable connector for use in a high temperature radiation environment in the nuclear power field as claimed in claim 5 or 6, characterized in that: The front shell (2) is externally sleeved with a front shell joint (1); The front shell joint (1) is tubular, and its rear end extends inwardly to form a ring body; The front shell (2) is provided with a convex edge on the outside, and the convex edge is arranged at the front part of the ring body; There is a gap between the front shell (2) and the front shell joint (1).

8. A soft and hard cable connector for use in a high temperature radiation environment in the nuclear power field as claimed in claim 2, characterized in that: The rear section of the shielding tail clip (3) is threadedly connected with a tail clip cap (4).

9. A soft and hard cable connector for use in a high temperature radiation environment in the nuclear power field as claimed in claim 3, characterized in that: A crown spring (8) is installed in the socket.

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