CN219040853U - Mineral insulated cable assembly sealed by metal butt joint - Google Patents

Abstract

The utility model relates to a mineral insulated cable assembly sealed by metal butt joint, which comprises a plug cable and a socket cable, wherein the plug cable comprises a plug shell and a first cable, the socket cable comprises a socket shell and a second cable, a connecting nut is sleeved on the plug shell, an external thread is arranged on the outer side wall of the socket shell, a conical sealing surface is arranged at the front end of the plug shell, and a conical hole is arranged in the socket shell; the utility model has the advantages that: the external threads arranged on the outer side wall of the socket shell are matched and connected with the connecting nut, and the front end of the plug shell is provided with the conical sealing surface, so that when the plug shell and the socket shell are in butt joint, under the tightening and jacking of the connecting nut, the conical sealing surface is extruded into the conical hole of the socket shell, so that the conical surface contact seal is formed between the plug shell and the socket shell, the aging problem of a cable under high temperature and high irradiation dose can be effectively prevented, and the service life of the cable is greatly prolonged.

Description

Mineral insulated cable assembly sealed by metal butt joint

Technical Field

The utility model relates to a mineral insulated cable assembly sealed by metal butt joint.

Background

The nuclear power environment has the characteristics of high temperature, high pressure and high irradiation. Especially, under the working condition of serious accidents, the temperature can reach 530 ℃ instantly, the irradiation dose is greatly increased, the water loss accident or boric acid flooding condition can occur, and the cable assembly needs to meet the service life requirement of 60 years under the normal working condition. Many devices in a nuclear power plant need to be able to perform safety level functions in severe accident conditions and after an accident, which makes it necessary for the electrical connector to be able to meet severe environmental conditions of the nuclear power, and particularly needs for the connector to be able to meet waterproof, high temperature resistant and irradiation resistant requirements, otherwise, the devices cannot perform safety level functions under these conditions, which would endanger the safe operation of the nuclear power plant. The plug and socket butt joint seals of the traditional cable assembly are mostly soft sealing by rubber rings or rubber pads, any existing rubber material cannot meet the requirement of 530 ℃ high-temperature use, the rubber material can find aging phenomenon under severe environmental conditions, various slow and irreversible chemical and physical changes can occur along with the time, the elasticity of the rubber material is weakened, the hardness is increased, the electrical connector is easy to embrittle, the water seepage phenomenon of the electrical connector is caused, the safety performance of equipment is seriously affected, and even electric shock accidents are caused.

Disclosure of Invention

The utility model aims to solve the technical problem that a rubber ring or a rubber pad in the existing cable assembly can be aged under severe environmental conditions, and provides a mineral insulated cable assembly with metal butt joint sealing.

In order to solve the technical problems, the utility model is realized by the following technical scheme: the utility model provides a sealed mineral substance insulated cable subassembly of metal butt joint, includes plug cable and socket cable, plug cable includes plug casing and the first cable of setting in the plug casing, socket cable includes socket casing and the second cable of setting in the socket casing, the cover is equipped with coupling nut on the plug casing, be equipped with on the lateral wall of socket casing with coupling nut matched with external screw thread, the front end of plug casing is equipped with the toper sealed face, be equipped with in the socket casing with toper sealed face matched with bell mouth, the front end of toper sealed face forms elastic deformation arch under coupling nut's effect.

Preferably, the outer side wall of the plug housing is provided with a step and a clamping ring, and the connecting nut is arranged between the step and the clamping ring.

Preferably, a first insulator assembly is arranged in the plug housing, a jack for fixing a first cable is arranged in the first insulator assembly, a second insulator assembly is arranged in the socket housing, and a contact pin for fixing a second cable is arranged in the second insulator assembly.

Preferably, the plug housing is internally provided with a first tightening block, the first insulator assembly is fixed in the plug housing through the first tightening block, the socket housing is internally provided with a second tightening block, and the second insulator assembly is fixed in the socket housing through the second tightening block.

Preferably, the plug cable further comprises a first cable cover, the first cable cover is connected to the plug housing in a sealing mode through laser welding, the socket cable further comprises a second cable cover, and the second cable cover is connected to the socket housing in a sealing mode through laser welding.

Preferably, the first cable cover is hermetically connected to the first cable by laser welding, and the second cable cover is hermetically connected to the second cable by laser welding.

Preferably, epoxy glue is filled in the plug shell and the socket shell.

Preferably, the plug housing and the socket housing are both austenitic stainless steel housings.

In summary, the utility model has the advantages that: the external thread arranged on the outer side wall of the socket shell is matched and connected with the connecting nut, and the front end of the plug shell is provided with the conical sealing surface, so that when the plug shell and the socket shell are in butt joint, under the condition of tightening and jacking of the connecting nut, the conical sealing surface is extruded into the conical hole of the socket shell, so that conical contact sealing is formed between the plug shell and the socket shell, thereby effectively preventing the aging problem of a cable under high temperature and high irradiation dose, greatly prolonging the service life of the cable, and the conical sealing can effectively ensure the butt joint sealing of the electric connector, greatly improving the insulation and pressure resistance of the electric connector, and realizing the effects of heat and radiation insolation under 6.4.2 conventional use conditions and radiation insolation under 6.4.3 design basic events in the condition of IEEE383-2003 (1E-level cable of nuclear power station) and the qualification standard of an electric plug.

Drawings

The utility model is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic view of a metal butt sealed mineral insulated cable assembly according to the present utility model;

FIG. 2 is a schematic view of a plug cable according to the present utility model;

fig. 3 is a schematic structural view of a jack cable according to the present utility model.

Reference numerals:

1 plug cable, 10 plug housing, 11 first cable, 12 connection nut, 13 conical sealing surface, 14 steps, 15 collar, 16 first insulator assembly, 17 jack, 18 first tightening block, 19 first cable cover, 2 socket cable, 20 socket housing, 21 second cable, 22 external screw thread, 23 conical hole, 24 second insulator assembly, 25 pin, 26 second tightening block, 27 second cable cover, 3 epoxy glue.

Detailed Description

As shown in fig. 1, 2 and 3, the mineral insulated cable assembly with metal butt joint sealing comprises a plug cable 1 and a socket cable 2, wherein the plug cable 1 comprises a plug housing 10 and a first cable 11 arranged in the plug housing 10, the socket cable 2 comprises a socket housing 20 and a second cable 21 arranged in the socket housing 20, a connecting nut 12 is sleeved on the plug housing 10, an external thread 22 matched with the connecting nut 12 is arranged on the outer side wall of the socket housing 20, a conical sealing surface 13 is arranged at the front end of the plug housing 10, a conical hole 23 matched with the conical sealing surface 13 is arranged in the socket housing 20, and elastic deformation protrusions are formed at the front end of the conical sealing surface 13 under the action of the connecting nut 12.

The external thread 22 arranged on the outer side wall of the socket shell 20 is matched and connected with the connecting nut 12, and the front end of the plug shell 10 is provided with the conical sealing surface 13, so when the plug shell 10 and the socket shell 20 are in butt joint, under the tightening and jacking of the connecting nut 12, the conical sealing surface 13 is extruded into the conical hole 23 of the socket shell 20, so that conical contact sealing is formed between the plug shell 10 and the socket shell 20, thereby effectively preventing the aging problem of a cable under high temperature and high irradiation dose, greatly prolonging the service life of the cable, effectively ensuring the butt joint sealing of the electric connector, greatly improving the insulation and pressure resistance of the electric connector, being capable of realizing heat and radiation insolation under the normal use condition of 6.4.2 and irradiation of basic event design 6.4.3 in the qualification evaluation standard of 1E-class cable and electric plug of IEEE383-2003 nuclear power station, and the low temperature, high temperature, temperature change, vibration, impact and water tests specified in GB/T8993, in addition, because the front end of the conical sealing surface 13 forms an elastic deformation bulge under the action of the connecting nut 12, the elastic deformation bulge can play a role in preventing the loosening of the connecting nut 12 under the cooperation of elastic stress and the connecting nut 12, the elastic deformation bulge can also absorb the vibration of the electric connector from the outside, the screw thread loosening when the electric connector is butted can be effectively prevented, the reliable connection of the electric connector under the conditions of temperature change, liquid immersion, vibration and impact is ensured, the socket shell 20 and the plug shell 10 cancel the conical surface seal of the cutting sleeve type, the conical surface contact seal of the socket shell 20 and the plug shell 10 is directly adopted, the space for installing clamping beads is saved for the connector, and the connector can be provided with insulators with the same size, the external dimension of the connector can be miniaturized.

The outer side wall of the plug shell 10 is provided with a step 14 and a clamping ring 15, the connecting nut 12 is arranged between the step 14 and the clamping ring 15, a certain limiting effect can be achieved on the connecting nut 12, when the plug shell 10 and the socket shell 20 are in butt joint during specific installation, the plug shell 10 is aligned to the socket shell 20, then the connecting nut 12 is screwed by hands, the connecting nut 12 is screwed by hands until the connecting nut 12 is not screwed, then the connecting nut 12 is continuously reinforced by a torque wrench, at the moment, the connecting nut 12 abuts against the step 14, the practice proves that the effect of mechanical sealing can be completely achieved by taking the M15 connecting nut 12 as an example when the torque value is set to be 25-35 N.m, the air tightness of the structure can reach 0.8-1.0 MPa gas pressure through test verification, the liquid sealing pressure can reach 10-15 MPa, and the sealing effect can still be reached after 200 times of repeated disassembly. When the connector is required to be used in a common environment, the connecting nut 12 is not required to be screwed down by a torque wrench, and the connecting nut 12 is only required to be screwed down manually

The plug housing 10 is internally provided with the first insulator assembly 16, the first insulator assembly 16 is internally provided with the jack 17 for fixing the first cable 11, the jack 17 adopts an inconel718 jack, the quick fixing of the first cable 11 can be realized, specifically, a first welding cup can be arranged on the jack 17, in this embodiment, the first cable 11 is welded on the first welding cup through laser, the welding reliability is improved, the socket housing 20 is internally provided with the second insulator assembly 24, the second insulator assembly 24 is internally provided with the contact pin 25 for fixing the second cable 21, the contact pin 25 adopts an alloy steel contact pin, the quick fixing of the second cable 21 can be realized, specifically, a second welding cup can be arranged on the contact pin 25, and in this embodiment, the second cable 21 is welded on the second welding cup through laser, and the welding reliability is improved. The plug housing 10 is internally provided with a first tightening block 18, the first insulator assembly 16 is fixed in the plug housing 10 through the first tightening block 18, the first tightening block 18 can realize that the first insulator assembly 16 is quickly installed in the plug housing 10, the fixed quality of the first insulator assembly 16 is ensured, the socket housing 20 is internally provided with a second tightening block 26, the second insulator assembly 24 is fixed in the socket housing 20 through the second tightening block 26, the second tightening block 26 can realize that the second insulator assembly 24 is quickly installed in the socket housing 20, and the fixed quality of the second insulator assembly 24 is ensured.

The plug cable 1 further comprises a first cable cover 19, the first cable cover 19 is connected to the plug housing 10 in a sealing manner through laser welding, sealing performance of the tail of the plug housing 10 can be guaranteed, the socket cable 2 further comprises a second cable cover 27, the second cable cover 27 is connected to the socket housing 20 in a sealing manner through laser welding, sealing performance of the tail of the socket housing 20 can be guaranteed, the first cable cover 19 is connected to the first cable 11 in a sealing manner through laser welding, the plug cable 1 can be completely sealed from air, and the second cable cover 27 is connected to the second cable 21 in a sealing manner through laser welding, so that the socket cable 2 is completely sealed from air.

Epoxy glue 3 is filled and sealed in the plug housing 10 and the socket housing 20, so that the whole plug housing 10 and the whole socket housing 20 have the characteristics of high temperature resistance and irradiation resistance. The plug shell 10 and the socket shell 20 are both austenitic stainless steel shells, so that the butt joint seal of the plug shell 10 and the socket shell 20 has the characteristics of high temperature resistance, irradiation resistance and aging resistance, and completely accords with the severe environments of nuclear industry, locomotives, medical treatment and the like for use.

The above embodiments are merely illustrative embodiments of the present utility model, but the technical features of the present utility model are not limited thereto, and any changes or modifications made by those skilled in the art within the scope of the present utility model are included in the scope of the present utility model.

Claims (8)

1. The utility model provides a metal butt joint sealed mineral substance insulated cable subassembly, includes plug cable and socket cable, its characterized in that: the plug cable comprises a plug shell and a first cable arranged in the plug shell, the socket cable comprises a socket shell and a second cable arranged in the socket shell, a connecting nut is sleeved on the plug shell, an external thread matched with the connecting nut is arranged on the outer side wall of the socket shell, a conical sealing surface is arranged at the front end of the plug shell, a conical hole matched with the conical sealing surface is formed in the socket shell, and elastic deformation protrusions are formed at the front end of the conical sealing surface under the action of the connecting nut.

2. A metal-to-metal sealed mineral insulated cable assembly according to claim 1, wherein: the outer side wall of the plug shell is provided with a step and a clamping ring, and the connecting nut is arranged between the step and the clamping ring.

3. A metal-to-metal sealed mineral insulated cable assembly according to claim 1, wherein: the plug comprises a plug shell, and is characterized in that a first insulator assembly is arranged in the plug shell, a jack for fixing a first cable is arranged in the first insulator assembly, a second insulator assembly is arranged in the socket shell, and a contact pin for fixing a second cable is arranged in the second insulator assembly.

4. A metal-to-metal sealed mineral insulated cable assembly according to claim 3, wherein: the plug comprises a plug shell, a first insulator component, a socket shell and a second insulator component, wherein the plug shell is internally provided with a first tightening block, the first insulator component is fixed in the plug shell through the first tightening block, the socket shell is internally provided with the second tightening block, and the second insulator component is fixed in the socket shell through the second tightening block.

5. A metal-to-metal sealed mineral insulated cable assembly according to claim 1, wherein: the plug cable further comprises a first cable cover, the first cable cover is connected to the plug shell in a sealing mode through laser welding, the socket cable further comprises a second cable cover, and the second cable cover is connected to the socket shell in a sealing mode through laser welding.

6. A metal-to-metal sealed mineral insulated cable assembly according to claim 5, wherein: the first cable cover is connected to the first cable in a sealing mode through laser welding, and the second cable cover is connected to the second cable in a sealing mode through laser welding.

7. A metal-to-metal sealed mineral insulated cable assembly according to claim 1, wherein: epoxy glue is filled in the plug shell and the socket shell.

8. A metal-to-metal sealed mineral insulated cable assembly according to claim 1, wherein: the plug shell and the socket shell are both austenitic stainless steel shells.

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