An electrical feedthrough for an LNG cryogenic system
By designing a power penetration joint for LNG cryogenic systems, employing a double-sealed structure and stainless steel material, the problem of cryogenic cable joints being unable to isolate the cryogenic medium from the atmospheric side is solved, achieving a safe and reliable static sealing effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANTONG JIEXIN MARINE ENGINEERING CO LTD
- Filing Date
- 2025-07-04
- Publication Date
- 2026-06-23
AI Technical Summary
In existing LNG cryogenic systems, the joints of cryogenic cables cannot effectively isolate the cryogenic medium from the atmospheric side, resulting in poor safety and reliability, and the inability to achieve static sealing.
Design an electrical penetration connector including a housing, flanges, and terminals. It adopts a double-sealed structure, forming a truly integrated double-sealed electrical penetration component through flange No. 1, housing, and flange No. 2. Combining stainless steel material and sealing structure, it achieves isolation and static sealing between the low-temperature medium and the atmospheric side.
It achieves effective isolation and static sealing between the cryogenic medium and the atmospheric side, improves the safety and reliability of the system, avoids medium leakage, and eliminates the need for nitrogen pressure monitoring.
Smart Images
Figure CN224401140U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of marine equipment technology, specifically to an electric through-connector for LNG cryogenic systems. Background Technology
[0002] LNG cryogenic systems refer to a series of equipment and systems used in the production, storage and transportation of liquefied natural gas (LNG). They mainly include components such as cryogenic LNG loading arms, cylinders, vaporizers, buffer tanks, and self-pressurization systems. These systems maintain the liquid state of LNG at extremely low temperatures (-162°C) to ensure its safety and efficiency during transportation and use.
[0003] LNG cryogenic systems mainly consist of liquefaction units, storage containers, and reliquefaction systems. The liquefaction unit progressively pre-cools and liquefies natural gas through the compression, cooling, and heat exchange processes of a mixed refrigerant (such as nitrogen, methane, and ethylene). This process typically takes place within a closed system, where the mixed refrigerant undergoes staged compression, cooling, and heat exchange, ultimately liquefying the natural gas.
[0004] Liquefied LNG is typically stored in cryogenic storage containers with good insulation to minimize heat transfer and reduce evaporation losses.
[0005] The reliquefaction system uses components such as refrigeration equipment and heat exchangers to reliquefy these evaporated gases, ensuring the safe storage and transportation of LNG;
[0006] However, in LNG cryogenic systems, the joints of cryogenic cables in existing technologies still have some shortcomings:
[0007] Existing technologies often fail to isolate the cryogenic medium from the atmospheric side after splicing cryogenic cables, thus failing to achieve static sealing of the cable and resulting in poor safety and reliability. Utility Model Content
[0008] In order to solve the above problems, the purpose of this utility model is to provide a power penetration joint for LNG cryogenic systems.
[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a power penetration connector for an LNG cryogenic system, comprising a carrier and connector components, wherein several connector components are provided and several connector components are assembled on the carrier. Each connector component includes a housing, one end of which is detachably fitted with a No. 1 flange, and the other end of which is detachably fitted with a No. 2 flange. A feed line is assembled inside the housing, a No. 1 terminal is assembled inside the No. 1 flange, and a No. 2 terminal is assembled inside the No. 2 flange. The No. 1 terminal is electrically connected to the No. 2 terminal through the feed line.
[0010] Preferably, a No. 1 assembly bolt is threadedly rotatably installed between one end of the housing and the No. 1 flange.
[0011] Preferably, a No. 2 assembly bolt is threadedly rotatably installed between the other end of the housing and the No. 2 flange.
[0012] Preferably, the housing, flange number one, and flange number two are made of stainless steel.
[0013] Preferably, a No. 1 seal is fitted between one end of the housing and the No. 1 flange, and a No. 2 seal is fitted between the other end of the housing and the No. 2 flange.
[0014] Preferably, the bearing member includes a support sleeve with a plurality of through holes arranged in a ring array. The connector passes through the through holes. A plurality of fixing bolts are threadedly mounted on the outer wall of the support sleeve. A plurality of threaded sleeves are provided on the outer wall of the housing. One end of each fixing bolt is threadedly connected to the inner wall of the threaded sleeve.
[0015] Preferably, the support sleeve is provided with a plurality of slots arranged in a ring array, the slots communicating with the insertion holes, a rubber ring being fixedly provided on the inner wall of the insertion holes, and the outer wall of the housing and the inner wall of the rubber ring being in movable contact.
[0016] Preferably, a base frame is fixedly provided at the bottom of the support sleeve, and several mounting holes are provided at both ends of the base frame.
[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0018] 1. In this utility model, an electrical penetration connector (connector) consisting of a shell, a first flange, and a second flange is assembled with a first terminal, a feeder line, and a second terminal. By making the first terminal, the feeder line, and the second terminal, together with the shell, the first flange, and the second flange, a truly integrated double-sealed electrical penetration component is formed for power transmission. At the same time, it also has the static sealing function of isolating the low-temperature medium from the atmospheric side, which is safe and reliable. At the same time, it does not require the addition of nitrogen pressure monitoring.
[0019] 2. In this utility model, a bearing member consisting of a support sleeve, multiple through holes and multiple fixing bolts can be used to assemble multiple connectors into the multiple through holes of the support sleeve, thereby enabling the wiring of multiple cables in a flexible and convenient manner. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the overall structure of the carrier and connector of this utility model.
[0022] Figure 2 This is a schematic diagram of the structure of a power penetration joint for an LNG cryogenic system according to the present invention.
[0023] Figure 3 This is a schematic diagram showing the connection status of the cable and the power penetration joint in an embodiment of this utility model.
[0024] Figure 4 This is a schematic diagram showing the usage status of the power penetration connector according to an embodiment of this utility model.
[0025] Figure 5 This is a schematic diagram of the composition of the carrier component of this utility model.
[0026] In the diagram: 50, load-bearing component; 60, connector; 10, housing; 11, threaded sleeve; 20, flange No. 1; 30, flange No. 2; 21, assembly bolt No. 1; 31, assembly bolt No. 2; 22, terminal No. 1; 32, terminal No. 2; 23, seal No. 1; 33, seal No. 2; 40, feeder line; 100, deck body; 200, transfer pump; 210, pump cable; 220, cryogenic cable deck conduit; 300, junction box; 310, user-end cable; 320, sealing pipe; 400, bracket; 51, support sleeve; 52, through hole; 521, slot; 53, rubber ring; 54, fixing bolt; 55, base frame; 56, mounting hole. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] Example: Figure 1-5As shown, this utility model provides a power penetration connector for an LNG cryogenic system, including a carrier 50 and connectors 60. Several connectors 60 are provided, and each connector 60 is assembled onto the carrier 50. The connectors 60 can be assembled onto the carrier 50 or used individually. The carrier 50 supports the connectors 60, thus facilitating the connection of multiple cables. Each connector 60 includes a housing 10, with a first flange 20 detachably mounted at one end. A first mounting bolt 21 is threadedly mounted between one end of the housing 10 and the first flange 20. By using the first mounting bolt 21, the first flange 20 can be easily fixed to the housing 10. At one end of the housing 10, a second flange 30 is detachably installed at the other end. A second assembly bolt 31 is threadedly installed between the other end of the housing 10 and the second flange 30. By using the second assembly bolt 31, the second flange 30 can be easily fixed to the other end of the housing 10. The housing 10, the first flange 20, and the second flange 30 are made of stainless steel. The stainless steel material of the housing 10, the first flange 20, and the second flange 30 can prevent rust and corrosion, thereby improving their service life. When used on the deck body 100, a bracket 400 is installed on the deck body 100. The bracket 400 supports the housing 10, the first flange 20, and the second flange 30. The housing 10 is fixed and provides support. A feeder cable 40 is installed inside the housing 10. A terminal 22 is installed inside the first flange 20. The end of the user-end cable 310 on the junction box 300 is mounted on the first terminal 22. A terminal 32 is installed inside the second flange 30. The end of the pump cable 210 on the delivery pump 200 is mounted on the second terminal 32. This allows the feeder cable 40, housing 10, first flange 20, and second flange 30 to form a truly integrated, double-sealed electrical connection. The first terminal 22 is electrically connected to the second terminal 32 via the feeder cable 40. A seal 23 is installed between one end of housing 10 and the first flange 20, and the other end of housing 10 is connected to the second flange. A second seal 33 is installed between 30. By setting the first seal 23 and the second seal 33, the cryogenic medium is blocked in the cavity and sealing pipe 320 before the first seal 23. When the first seal 23 fails, the medium leaks into the inner cavity of the housing 10. The inner cavity of the housing 10 is a whole conductor with no electrical contacts and no ignition source. Moreover, the inner cavity of the housing 10 meets the explosion-proof requirements after the explosion-proof plug is installed. Therefore, the through joint still meets the usage requirements at this time. When the second seal 33 fails, the medium will leak into the cryogenic cable deck conduit 220. In summary, based on safety, the use of a double flange sealed through joint is very reliable, and at the same time, it is not necessary to add nitrogen pressure monitoring.
[0029] The support member 50 includes a support sleeve 51, on which a plurality of through holes 52 are arranged in an annular array. A connector 60 passes through the through holes 52, allowing the connector 60 to pass entirely through the holes 52 and connect to the support sleeve 51. A rubber ring 53 is fixedly installed on the inner wall of the through holes 52, and the outer wall of the housing 10 and the inner wall of the rubber ring 53 are in movable contact. The support sleeve 51 has a plurality of slots 521 arranged in an annular array, which communicate with the through holes 52. The slots 521 facilitate observation of the status of the connector 60 and the assembly and connection of other lines or pipes. The rubber ring 53, being elastic and contractile, provides a certain amount of room for movement, allowing the connector 60 to pass through the through holes 52. To maintain stability, several fixing bolts 54 are rotatably installed on the outer wall of the support sleeve 51. Several threaded sleeves 11 are provided on the outer wall of the housing 10. One end of the fixing bolt 54 is rotatably connected to the inner wall of the threaded sleeve 11. By setting the fixing bolt 54 and the threaded sleeve 11, when the housing 10 enters the interior of the through hole 52, the connector 60 can be fixed on the support sleeve 51 by rotating the fixing bolt 54 into the interior of the threaded sleeve 11. A base frame 55 is fixedly provided at the bottom of the support sleeve 51. Several mounting holes 56 are provided at both ends of the base frame 55. By setting the base frame 55 and the mounting holes 56, the base frame 55 can be installed on the bracket 400 through the mounting holes 56. At the same time, the connector 60 can also be installed on the bracket 400 separately.
[0030] Working principle: During the wiring process of the user-end cable 310 of junction box 300 and the pump cable 210 of transfer pump 200, the power penetration joint composed of housing 10, flange 20 and flange 30 is used, and terminal 22, feeder line 40 and terminal 32 are assembled. By making terminal 22, feeder line 40 and terminal 32, together with housing 10, flange 20 and flange 30, a truly integrated double-sealed electrical penetration component is formed for power transmission. At the same time, it also has the static sealing function of isolating the low temperature side medium from the atmospheric side, which is safe and reliable, and does not require nitrogen pressure monitoring.
[0031] When multiple cables need to be connected, the base frame 55 can be installed on the bracket 400 through the mounting hole 56. Then, multiple connectors 60 are inserted through multiple insertion holes 52, and the threaded sleeves 11 on the housing 10 correspond to the fixing bolts 54. Then, the multiple fixing bolts 54 are rotated so that the ends of the multiple fixing bolts 54 enter the corresponding threaded sleeves 11, so that the multiple connectors 60 are fixed on the support sleeve 51. Then, the multiple connectors 60 on the support sleeve 51 are used to perform the wiring operation of multiple cables, which can realize the wiring operation of multiple cables in a flexible and convenient manner.
[0032] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.
[0033] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.
Claims
1. A power penetration connector for an LNG cryogenic system, comprising a carrier (50) and connectors (60), wherein a plurality of connectors (60) are provided, and a plurality of connectors (60) are assembled on the carrier (50), characterized in that: The connector (60) includes a housing (10), one end of which is detachably fitted with a first flange (20), and the other end of which is detachably fitted with a second flange (30). A feed line (40) is installed inside the housing (10). A first terminal (22) is installed inside the first flange (20), and a second terminal (32) is installed inside the second flange (30). The first terminal (22) is electrically connected to the second terminal (32) through the feed line (40).
2. The power penetration joint for an LNG cryogenic system as described in claim 1, characterized in that, One end of the housing (10) is threadedly connected to the first flange (20) with a first assembly bolt (21).
3. The power penetration joint for an LNG cryogenic system as described in claim 1, characterized in that, The other end of the housing (10) is threadedly mounted with a second assembly bolt (31) between it and the second flange (30).
4. The power penetration joint for an LNG cryogenic system as described in claim 1, characterized in that, The housing (10), flange No. 1 (20) and flange No. 2 (30) are made of stainless steel.
5. A power penetration joint for an LNG cryogenic system as described in claim 1, characterized in that, A first seal (23) is fitted between one end of the housing (10) and the first flange (20), and a second seal (33) is fitted between the other end of the housing (10) and the second flange (30).
6. The power penetration joint for an LNG cryogenic system as described in claim 1, characterized in that, The bearing member (50) includes a support sleeve (51), on which a plurality of through holes (52) are arranged in an annular array. The connector (60) passes through the through holes (52). A plurality of fixing bolts (54) are threadedly mounted on the outer wall of the support sleeve (51). A plurality of threaded sleeves (11) are provided on the outer wall of the housing (10). One end of the fixing bolt (54) is threadedly connected to the inner wall of the threaded sleeve (11).
7. A power penetration joint for an LNG cryogenic system as described in claim 6, characterized in that, The support sleeve (51) is provided with a number of slots (521) arranged in an annular array. The slots (521) are connected to the through holes (52). A rubber ring (53) is fixedly provided on the inner wall of the through holes (52). The outer wall of the shell (10) and the inner wall of the rubber ring (53) are in contact.
8. A power penetration joint for an LNG cryogenic system as described in claim 6, characterized in that, The bottom of the support sleeve (51) is fixedly provided with a base frame (55), and both ends of the base frame (55) are provided with a number of mounting holes (56).