A nuclear power plant neutron temperature measurement channel cable connection assembly

Abstract

The present application belongs to the technical field of nuclear power plant reactor core, and particularly relates to a nuclear power plant neutron temperature measurement channel cable connection assembly. The present application comprises a stainless steel bellows and a cable, both ends of the stainless steel bellows are fixedly and sealingly connected with an adapter through argon arc welding, the left end of the adapter away from the stainless steel bellows is fixedly and sealingly connected with a connecting component through argon arc welding, the right end of the adapter away from the stainless steel bellows is fixedly and sealingly connected with a connector through argon arc welding, and the cable passes through a closed cavity formed by the connecting component, the stainless steel bellows and the connector shell; the connecting component is sealingly connected with a measurement channel shell, the internal cable is connected with a sensor core in the measurement channel, the connector shell is connected with a socket on a pool side plug-in board and forms a seal at a head seat plug-in end face, and the internal cable core is connected with a contact in the plug. The present application isolates the cable from the external high-humidity or water-immersed environment, and reduces the risk of cable moisture.

Description

Technical Field

[0001] This invention belongs to the field of nuclear power plant reactor core technology, specifically relating to a cable connection assembly for a neutron temperature measurement channel in a nuclear power plant. Background Technology

[0002] The core testing system is used to measure the neutron flux and core outlet temperature of the reactor core. The measurement signals are output through the core testing cable connector assembly at the top of the reactor core to the connector socket on the plug-in plate at the edge of the water pool, and are connected to the core testing cable from the containment penetration.

[0003] Because it is used on the top of the reactor within the containment vessel, the cables and connectors used in this system must be able to withstand the environmental challenges of high temperature, high pressure, high humidity, and high cumulative radiation dose.

[0004] Commonly used cables will develop the following problems after long-term use:

[0005] When used in environments with high temperature, high pressure, high humidity, and high cumulative radiation dose for a long time, the integrity of the outer sheath is irreversibly damaged due to aging. Especially in simulated severe accidents, the damage to the aged cable sheath may even cause water to seep out between the core wires, drastically reducing insulation and seriously affecting the safety of nuclear power plant operation.

[0006] Based on the above, measures must be taken to isolate the cable from external high humidity or water-immersed environments to reduce the risk of the cable getting damp. Summary of the Invention

[0007] The purpose of this invention is to provide a cable connection assembly for a neutron temperature measurement channel in a nuclear power plant, which isolates the cable from the external high humidity or water immersion environment, reducing the risk of the cable getting damp.

[0008] The technical solution adopted in this invention is as follows:

[0009] A cable connection assembly for a neutron temperature measurement channel in a nuclear power plant includes a stainless steel corrugated pipe and a cable. Both ends of the stainless steel corrugated pipe are fixedly and sealed with adapters via argon arc welding. The left end of the adapter, away from the stainless steel corrugated pipe, is fixedly and sealed with a connecting component via argon arc welding. The right end of the adapter, away from the stainless steel corrugated pipe, is fixedly and sealed with a connector via argon arc welding. The cable passes through a sealed cavity formed by the connecting component, the stainless steel corrugated pipe, and the connector housing. The connecting component is sealed to the measurement channel housing, and the internal cable is connected to the sensor core in the measurement channel. The connector housing is connected to a socket on a plug plate near the water tank and forms a seal at the headstock mating end face. The internal cable core is connected to the contact element inside the plug.

[0010] The stainless steel corrugated pipe is externally fixed with a stainless steel braided layer.

[0011] It also includes a scraping assembly, which includes a support frame, a slide rod, a reciprocating screw, a slider, and a scraper. Two support frames are respectively fixedly sleeved on two adapters. Three support frames are evenly arranged on the support frame. The support frame has two through holes, one above the other. The two ends of the slide rod are respectively fixedly sleeved in the lower through holes of the two support frames near the stainless steel braided layer. The two ends of the reciprocating screw are respectively fixedly sleeved in the upper through holes of the two support frames away from the stainless steel braided layer. The slider is slidably sleeved on the slide rod. The scraper is fixedly installed at the end of the slider near the stainless steel braided layer.

[0012] The scraper makes sliding contact with the stainless steel braided layer.

[0013] It also includes a screw sleeve and a turbine. The screw sleeve is threaded onto the reciprocating screw, the turbine is fixedly sleeved onto the screw sleeve, and the screw sleeve is rotatably sleeved inside the slider.

[0014] When operating in water, the water's ripples impact the turbine, causing it to rotate. This rotation of the turbine drives the screw sleeve to rotate, which, due to the interference of the threads, moves along the reciprocating screw. This movement causes the slider to move along the slide bar, which in turn moves the scraper to clean the stainless steel woven layer. This prevents impurities in the water from adhering to the surface of the stainless steel woven layer, reducing corrosion.

[0015] When the device is used in the air, the airflow drives the turbine to rotate, which in turn drives the scraper to scrub the surface of the stainless steel woven layer, preventing water vapor in the atmosphere from adhering to its surface.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] (1) The present invention provides a neutron temperature measurement channel cable connection assembly for nuclear power plants, which adopts a continuous metal protection method to seal the internal cable and isolate the external high humidity or water immersion environment from the cable. Even if the cable outer sheath suffers structural damage after long-term exposure to the nuclear-grade environment with high temperature and high cumulative radiation dose, it will be isolated from the external high humidity or water immersion environment by the continuous metal protection and will not cause the cable insulation to become damp and degrade. It has a good protective effect on the cable.

[0018] (2) The present invention provides a cable connection assembly for a neutron temperature measurement channel in a nuclear power plant. By setting multiple sets of scraping components on the outside of the stainless steel braided layer, the outside of the stainless steel braided layer can be cleaned. When the device is in water, it can prevent impurities in the water from adhering to the outside of the stainless steel braided layer. When the device is in the atmosphere, it can prevent water vapor in the air from adhering to the outside of the stainless steel braided layer. In this way, the stainless steel braided layer can be protected and its service life can be extended, thereby making the device's protection of the cable more durable and reliable. Attached Figure Description

[0019] Figure 1 This invention provides a schematic diagram of a cable connection assembly for a neutron temperature measurement channel in a nuclear power plant.

[0020] Figure 2 : Figure 1 A schematic diagram of the structure of part A;

[0021] Figure 3 : A three-dimensional structural diagram illustrating the positional relationship between the stainless steel braided layer and the scraping component in this invention;

[0022] Figure 4 : Figure 3 A structural diagram of section B;

[0023] In the diagram: 1. Stainless steel corrugated pipe; 2. Cable; 3. Adapter; 4. Stainless steel braided layer; 5. Connecting component; 6. Connector; 7. Support frame; 8. Slide rod; 9. Anti-slip reciprocating screw; 10. Slider; 11. Scraper; 12. Screw sleeve; 13. Turbine. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] like Figure 1-4As shown, the present invention provides a cable connection assembly for a neutron temperature measurement channel in a nuclear power plant, comprising a stainless steel corrugated pipe 1 and a cable 2. The stainless steel corrugated pipe 1 is externally fitted with a stainless steel braided layer 4, and both ends are fixedly and sealed with adapters 3 by argon arc welding. The left end of the adapter 3, away from the stainless steel corrugated pipe 1, is fixedly and sealed with a connecting component 5 by argon arc welding, and the right end of the adapter 3, away from the stainless steel corrugated pipe 1, is fixedly and sealed with a connector 6 by argon arc welding. The cable 2 passes through the sealed cavity formed by the connecting component 5, the stainless steel corrugated pipe 1, and the outer shell of the connector 6. The connecting component 5 is sealed to the outer shell of the measurement channel, and the internal cable 2 is connected to the sensor core in the measurement channel. The outer shell of the connector 6 is connected to the socket on the plug plate at the edge of the pool and forms a seal at the headstock mating end face. The internal cable 2 core is connected to the contact inside the plug.

[0028] The neutron temperature measurement channel cable connection assembly of the nuclear power plant forms a continuous, sealed metal protective cavity on the outside, and the internal cable 2 also forms a signal transmission channel. Even if the outer sheath of the cable 2 suffers structural damage after being subjected to the nuclear-grade environment of high temperature and high cumulative radiation dose for a long time, it will be isolated from the external high humidity or water immersion environment by the continuous metal protection, so that the insulation of the cable 2 will not be affected by moisture and thus reduce its strength. This effectively improves the safety of the cable 2.

[0029] It also includes a scraping assembly, which includes a support frame 7, a slide rod 8, a reciprocating screw 9, a slider 10, a scraper 11, a screw sleeve 12, and a turbine 13. Two support frames 7 are respectively fixedly sleeved on two adapters 3. Three support frames are evenly provided on the support frame 7. The support frame has two through holes, one above the other. The two ends of the slide rod 8 are respectively fixedly sleeved in the lower through holes of the two support frames 7 near the stainless steel braided layer 4. The two ends of the reciprocating screw 9 are respectively fixedly sleeved in the upper through holes of the two support frames 7 away from the stainless steel braided layer 4. The slider 10 is slidably sleeved on the slide rod 8. The scraper 11 is fixedly installed at one end of the slider 10 near the stainless steel braided layer 4 and slides in contact with the stainless steel braided layer 4. The screw sleeve 12 is threadedly sleeved on the reciprocating screw 9. The turbine 13 is fixedly sleeved on the screw sleeve 12. The screw sleeve 12 is rotatably sleeved inside the slider 10.

[0030] When the device is in protective working condition, if it is operating in water, the water ripples impact the turbine 13, causing the turbine 13 to rotate. This rotation drives the screw sleeve 12 to rotate, and the screw sleeve 12, under the interference of the threads, moves on the reciprocating screw 9, causing the slider 10 to move on the slide rod 8. The slider 10 then drives the scraper block 11 to move, scraping and washing the stainless steel braided layer 4 to prevent impurities in the water from adhering to the surface of the stainless steel braided layer 4 and reduce corrosion. When the device is used in the air, the air circulation can also drive the turbine 13 to rotate, causing the scraper block 11 to scrape and wash the surface of the stainless steel braided layer 4, preventing water vapor in the atmosphere from adhering to its surface. In this way, the stainless steel braided layer 4 can be protected, extending its service life, thus making the device's protection of the cable 2 more durable and reliable.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A nuclear power plant neutron temperature measurement channel cable connection assembly, characterized by, The utility model provides a kind of stainless steel bellows and cable, stainless steel bellows (1) both ends are fixedly connected with adapter (3) by argon arc welding, left end adapter (3) is fixedly connected with connecting component (5) by argon arc welding at the end away from stainless steel bellows (1), right end adapter (3) is fixedly connected with connector (6) by argon arc welding at the end away from stainless steel bellows (1), cable (2) passes through the closed cavity formed by the shell of connecting component (5), stainless steel bellows (1) and connector (6);Connecting component (5) is sealingly connected with the shell of measuring channel, the cable (2) inside is connected with sensor wire core in measuring channel, the shell of connector (6) is connected with the socket on pool side plug-in board and forms sealing at the head seat plug-in end face, the cable (2) inside is connected with the contact inside plug; Stainless steel braided layer (4) is fixedly sleeved outside the stainless steel bellows (1); It also includes a scraping and washing assembly, which includes a support frame (7), a sliding rod (8), a reciprocating screw rod (9), a sliding block (10), and a scraping block (11). Two support frames (7) are fixedly sleeved on two adapters (3), respectively. Three support frames are evenly arranged on each support frame (7), and two through holes are arranged on each support frame. The sliding rod (8) is fixedly sleeved in the lower through hole of the two support frames (7) close to the stainless steel braided layer (4). The reciprocating screw rod (9) is fixedly sleeved in the upper through hole of the two support frames (7) away from the stainless steel braided layer (4). The sliding block (10) is slidingly sleeved on the sliding rod (8). The scraping block (11) is fixedly installed on one end of the sliding block (10) close to the stainless steel braided layer (4).

2. The nuclear power plant neutron temperature measurement channel cable connection assembly of claim 1, wherein, The scraping block (11) is in sliding contact with the stainless steel braided layer (4).

3. The nuclear power plant neutron temperature measurement channel cable connection assembly of claim 2, wherein, It also includes a screw sleeve (12) and a turbine (13). The screw sleeve (12) is threadedly sleeved on the reciprocating screw rod (9). The turbine (13) is fixedly sleeved on the screw sleeve (12). The screw sleeve (12) is rotationally sleeved in the sliding block (10).

4. The nuclear power plant neutron temperature measurement channel cable connection assembly of claim 3, wherein, When working in water, the fluctuation of the water body impacts the turbine (13), which rotates and drives the screw sleeve (12) to rotate. Under the interference of the threads, the screw sleeve (12) moves on the reciprocating screw rod (9), which drives the sliding block (10) to move on the sliding rod (8). The sliding block (10) drives the scraping block (11) to move, which scrapes and washes the stainless steel braided layer (4) to prevent impurities in the water from adhering to the surface of the stainless steel braided layer (4) and reduce corrosion.

5. The nuclear power plant neutron temperature measurement channel cable connection assembly of claim 4, wherein, When the device is used in air, the air flow drives the turbine (13) to rotate, which drives the scraping block (11) to scrape and wash the surface of the stainless steel braided layer (4) to prevent water vapor in the air from adhering to the surface.

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