Liquefied natural gas (LNG) transport ship emergency pump motor power supply quick connection device and quick connection method

Abstract

The invention discloses an LNG transport ship emergency pump motor power source quick connection device and method, and belongs to the technical field of transport ship cable quick connection. The LNG transport ship emergency pump motor power source quick connection device comprises a junction box, three sets of motor cable access pipes are fixedly installed at one end of the junction box, and two sets of main power source cable access pipes are fixedly installed at the other end of the junction box; the top of the junction box is detachably provided with a junction box cover plate, the junction box is also internally provided with a power supply cable quick connection device, the power supply cable quick connection device is detachably installed in the three groups of motor cable access pipes and the two groups of main power supply cable access pipes, and the power supply cable quick connection device and the cable quick connection male and female heads are matched for use, so that the power supply cable can be connected to the junction box. The cable quick-connection male head and the cable quick-connection female head both adopt the silver coating to improve the conductivity of the contact surface, and the male head and the female head can adapt to different power supply current capacity requirements by adjusting the size, length and diameter, can adapt to all cable quick-connection requirements, and are very strong in universality.

Description

Technical Field

[0001] The present invention belongs to the technical direction of cable quick connection of transport ships, and specifically relates to a quick connection device and a quick connection method for an emergency pump motor power supply of an LNG transport ship. Background Art

[0002] LNG ships are the type of ships with the highest safety requirements in the world. The safety of LNG cargo has always been the focus of shipowners and owners, and has become a very important link in the design and construction process of shipyards. When the LNG ship cargo control system has control abnormalities or equipment is damaged and the pressure and temperature of LNG cargo cannot be ensured, it is particularly important to handle LNG cargo in time to ensure the safety of the ship itself. LNG emergency pumps are an effective way to transfer LNG cargo in emergency situations in LNG cargo holds. It is very important to quickly and reliably connect the motor power cable. Summary of the invention

[0003] The object of the present invention is to provide a quick connection device and a quick connection method for an emergency pump motor power supply of an LNG transport ship, so as to solve the problems raised in the above-mentioned background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a LNG transport ship emergency pump motor power quick connection device and quick connection method, including a junction box, one end of the junction box is fixedly installed with three groups of motor cable access pipes, the other end of the junction box is fixedly installed with two groups of main power cable access pipes, the top of the junction box is detachably installed with a junction box cover, the interior of the junction box is also provided with a power cable quick connection device, the power cable quick connection device can be detachably installed in the three groups of motor cable access pipes and the two groups of main power cable access pipes, the power cable quick connection device includes a power supply cable fixed stuffing box, a cable compression stuffing box, a clamping stuffing box, a cable quick connection female head, a cable A quick-connect male connector and a wiring copper busbar, wherein the fixed stuffing box of the power supply cable can be detachably mounted on the inner wall of the power cable quick-connect device, the cable compression stuffing box can be detachably mounted on one end of the power cable quick-connect device, the clamping stuffing box can be detachably mounted on one side of the cable compression stuffing box, the cable quick-connect female connector is fixedly welded inside the power cable quick-connect device, the cable quick-connect male connector can be detachably mounted in the cable quick-connect female connector, the cable quick-connect male connector is used in conjunction with the cable quick-connect female connector, the wiring copper busbar is fixedly mounted on one end of the cable quick-connect female connector, the cable quick-connect male connector and the cable quick-connect female connector are both made of silver-plated aluminum alloy, and a temperature sensor is fixedly mounted on one side of the interior of the junction box.

[0005] The present invention further illustrates that a protective box is detachably installed on the top of the junction box, a first fixed seat is detachably installed on the cover plate of the junction box, a first magnetic fixed block is fixedly installed inside the first fixed seat, two groups of electric fan blades are arranged on both sides of the box body of the protective box, namely the first electric fan blades and the second electric fan blades, a water tank is fixedly installed on the top of the protective box, a collecting pipe is arranged on the water tank, the inside of the pipe mouth of the collecting pipe is arranged in an inclined shape, an electric valve is fixedly installed inside the collecting pipe, and a humidity sensor is fixedly installed on one side of the top of the protective box.

[0006] The present invention further describes that two groups of first cleaning nozzles are fixedly installed on one side of the interior of the protective box, and the two groups of the first cleaning nozzles correspond to the positions of the five groups of cable access pipes, and two groups of second cleaning nozzles are fixedly installed on the other side of the interior of the protective box, and the two groups of the second cleaning nozzles correspond to the positions of the junction box cover.

[0007] The present invention further describes that a second fixing seat is provided at the inner top of the protective box, a second magnetic fixing block is fixedly installed on the second fixing seat, the position of the second fixing seat corresponds to the first fixing seat, and the second magnetic fixing block cooperates with the first magnetic fixing block.

[0008] The present invention further describes that the protection box is provided with pipelines to connect the water tank with four groups of cleaning nozzles, and the four groups of cleaning nozzles are provided with electric valves.

[0009] The present invention further describes that the junction box and the junction box cover are both made of stainless steel.

[0010] The present invention further describes that the interior of the junction box is hollow.

[0011] The present invention further illustrates that the junction box is placed on the deck of the LNG cargo tank.

[0012] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention can play the role of quick-connecting cables through the coordinated use of the power cable quick-connecting device, the cable quick-connecting male head and the cable quick-connecting female head. The cable quick-connecting male head and the cable quick-connecting female head both use a silver-plated layer to improve the conductivity of the contact surface, and the male and female heads can be adapted to different power supply current capacity requirements by adjusting the length and diameter, and can be adapted to all cable quick-connection requirements, and have very strong versatility. The power cable quick-connecting device can be designed and produced in batches in a standardized manner, and different configurations can be changed according to different motor power requirements, which can effectively solve the power emergency connection requirements of the LNG emergency pump in the event of an abnormal emergency of LNG cargo, thereby gaining more valuable time for ship safety disposal measures and playing a role in the safe operation of LNG ships. By using a temperature sensor in conjunction with two sets of electric fan blades, the heat dissipation speed can be adjusted according to different working temperatures to ensure that the junction box itself will not malfunction due to overheating. At the same time, it can prevent the junction box from being exposed to direct sunlight and causing high temperatures, thereby ensuring safety during navigation. By using a humidity sensor in conjunction with four sets of cleaning nozzles, the interface of the cable access pipe body can be cleaned to prevent seawater from corroding the pipe body connection and causing it to rust and break. At the same time, the fixing nuts on the junction box cover can also be cleaned to prevent seawater from rusting the nuts, thereby increasing the service life of the junction box. While cleaning, the air flow rate can be accelerated to prevent water vapor from accumulating inside the protective box, thereby reducing the cost of the ship during navigation and ensuring the safety of the ship during navigation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of a junction box of the present invention; Figure 3 It is a schematic diagram of the internal structure of the junction box of the present invention; Figure 4 It is a schematic structural diagram of a power cable quick-connect device of the present invention; Figure 5 is a schematic diagram of a protective box of the present invention; Figure 6 is a schematic diagram of the protection box of another viewing angle of the present invention; Figure 7 It is a schematic diagram of the internal structure of the protection box of the present invention; Figure 8 It is a schematic diagram of the position of the electric valve of the present invention.

[0014] In the figure: 1. Junction box; 11. Motor cable access pipe; 12. Main power cable access pipe; 13. Temperature sensor; 2. Junction box cover; 21. First fixing seat; 22. First magnetic fixing block; 3. Power cable quick-connect device; 4. Power supply cable fixed stuffing box; 5. Cable compression stuffing box; 6. Clip-on stuffing box; 7. Cable quick-connect female connector; 8. Cable quick-connect male connector; 9. Wiring copper bar; 10. Protection box; 101. First electric fan blade; 102. Second electric fan blade; 103. Water tank; 104. Collecting pipe; 1041. Electric valve; 105. First cleaning nozzle; 106. Second cleaning nozzle; 107. Second fixing seat; 108. Second magnetic fixing block; 109. Humidity sensor. DETAILED DESCRIPTION

[0015] The following is a further non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] See also Figure 1-8 The present invention provides a technical solution: a LNG carrier emergency pump motor power quick connection device, comprising a junction box 1, the junction box 1 is placed on the deck of the LNG cargo tank, the interior of the junction box 1 is hollow, one end of the junction box 1 is fixedly installed with three groups of motor cable access pipes 11 for connecting the motor cables, the other end of the junction box 1 is fixedly installed with two groups of main power cable access pipes 12 for connecting the main power cables, the top of the junction box 1 is detachably installed with a junction box cover 2, the junction box cover 2 plays a protective role to prevent foreign matter from entering the junction box 1, the junction box cover 2 is detachably installed with a first fixing seat 21, and the first fixing seat 21 is fixedly installed with a first magnetic fixing block 22; A power cable quick-connect device 3 is also provided inside the junction box 1 for quickly connecting the motor cable and the power cable. The power cable quick-connect device 3 can be detachably installed in three groups of motor cable access tubes 11 and two groups of main power cable access tubes 12. The power cable quick-connect device 3 includes a power supply cable fixed stuffing box 4, a cable compression stuffing box 5, a clip-on stuffing box 6, a cable quick-connect female connector 7, a cable quick-connect male connector 8, and a wiring copper busbar 9; The fixed stuffing box 4 of the power supply cable can be detachably mounted on the inner wall of the power cable quick-connection device 3, and is used to cooperate with the insertion of the cable during the installation stage. The cable compression stuffing box 5 can be detachably mounted on one end of the power cable quick-connection device 3, and is used to compress the cable. The clamping stuffing box 6 can be detachably mounted on one side of the cable compression stuffing box 5, and is used to fix the cable. The cable quick-connection female head 7 is fixedly mounted inside the power cable quick-connection device 3. The cable quick-connection male head 8 can be detachably mounted in the cable quick-connection female head 7. The cable quick-connection male head 8 is used in conjunction with the cable quick-connection female head 7. The wiring copper bus 9 is fixedly mounted on one end of the cable quick-connection female head 7, and is used to connect the main power cable. The cable quick-connection male head 8 and the cable quick-connection female head 7 are both made of silver-plated aluminum alloy material, which can effectively improve the conductivity of the contact surface. The clip-on stuffing box 6, the cable quick-connect female connector 7, and the wiring copper bar 9 are all pre-fixed and installed in the power cable quick-connect device 3. When quick connection is required, just screw out the cable compression stuffing box 5, and then install the cable quick-connect male connector 8 at the motor cable connector. Finally, hold the motor cable through the cable compression stuffing box 5 and insert it into the power cable quick-connect device 3, so that the cable quick-connect male connector 8 contacts the cable quick-connect female connector 7, and then tighten the cable compression stuffing box 5 to complete the quick connection operation. A temperature sensor 13 is fixedly mounted on one side of the interior of the junction box 1 for detecting the working temperature.

[0017] A protective box 10 is detachably mounted on the top of the junction box 1. Two sets of electric fan blades are arranged on both sides of the box body of the protective box 10, namely, a first electric fan blade 101 and a second electric fan blade 102, which are used to cooperate with ventilation operation. A water tank 103 is fixedly mounted on the top of the protective box 10. A collecting pipe 104 is arranged on the water tank 103. The inside of the pipe mouth of the collecting pipe 104 is inclined to facilitate the staff to add anti-rust liquid. An electric valve 1041 is fixedly mounted inside the collecting pipe 104 to cooperate with controlling the flow of the anti-rust liquid. The protective box 10 Two groups of first cleaning nozzles 105 are fixedly installed on one side of the interior of the protective box 10, and the two groups of first cleaning nozzles 105 correspond to the positions of the five groups of cable access pipes, and are used to cooperate in cleaning the connection between the five groups of cable access pipes and the junction box 1 to prevent rust caused by seawater erosion and increase the service life. Two groups of second cleaning nozzles 106 are fixedly installed on the other side of the interior of the protective box 10, and the two groups of second cleaning nozzles 106 correspond to the positions of the junction box cover 2, and are used to cooperate in cleaning the junction box cover 2 to prevent seawater erosion and clean the fixing screws on the junction box cover 2.

[0018] A second fixing seat 107 is provided at the inner top of the protective box 10 , and a second magnetic fixing block 108 is fixedly mounted on the second fixing seat 107 . The position of the second fixing seat 107 corresponds to the first fixing seat 21 , and the second magnetic fixing block 108 cooperates with the first magnetic fixing block 22 .

[0019] The junction box 1 and the junction box cover 2 are both made of 316 stainless steel to ensure that in outdoor environments, water will not enter the box due to seawater corrosion, causing insulation problems for the entire ship's power distribution; The protection box 10 is equipped with a pipeline (not shown in the figure) to connect the water tank 103 with four groups of cleaning nozzles for providing anti-rust liquid for cleaning. The four groups of cleaning nozzles are equipped with electric valves (not shown in the figure) for controlling the spraying of the anti-rust liquid. A humidity sensor 109 is fixedly mounted on one side of the top of the protection box 10 to detect the humidity of the external air during navigation; The junction box 1 is equipped with a device program, which can control the operation of two sets of electric fan blades, the opening and closing of the electric valve 1041, and the opening and closing of the built-in electric valves of the four sets of cleaning nozzles; The two groups of electric fan blades, the electric valve 1041, and the built-in electric valves of the four groups of cleaning nozzles are all connected with the equipment program signal.

[0020] Cable quick-connect operation: Before the staff needs to perform the cable docking operation, the staff first performs the pre-installation operation on the junction box 1, and the staff pre-installs the two sets of power cable quick-connect devices 3 into the two sets of main power cable access pipes 12, and then the staff passes the ship power station power supply cable through the power supply cable fixed stuffing box 4 through the two sets of main power cable access pipes 12 into the main power cable junction box, and then inserts the clamping stuffing box 6 to fix the cable, and then inserts the cable compression stuffing box 5 to compress the cable. After the two sets of main power cables are connected, there is no need to disassemble and assemble them again. At this time, the staff performs the motor cable quick connection operation; The staff first holds the motor cable and installs the cable quick-connect male head 8 at the joint of the motor cable, then manually unscrews the cable compression type stuffing box 5, and passes the motor cable through the cable compression type stuffing box 5, inserts it into the power cable quick-connect device 3, makes the cable quick-connect male head 8 contact with the cable quick-connect female head 7, and then tightens the cable compression type stuffing box 5 to complete the quick-connect operation; During the quick connection process, the emergency pump power cable and the cable quick connection male connector 8 are quickly inserted into the cable quick connection female connector 7, and then the male and female connectors are compressed by the cable compression type stuffing box 5. In order to avoid the need to borrow tools during the operation, the cable compression type stuffing box 5 is specially designed with a convex corrugated rough surface, which can be tightened by hand; A copper wiring busbar 9 is extended at the rear end of the cable quick-connect female connector 7. The wiring busbar 9 is used to connect with the main power cable. In order to avoid the vibration that may be generated by the direct connection between the cable and the busbar and the improper control of the workers' strength during the wiring process, which may cause the cable quick-connect female connector 7 and the wiring busbar 9 to deform and break, a power terminal busbar support is specially installed in the middle of the main power cable connection box; Through the coordinated use of the power cable quick-connect device 3, the cable quick-connect male head 8 and the cable quick-connect female head 7, the cable can be quickly connected. The cable quick-connect male head 8 and the cable quick-connect female head 7 both use a silver-plated layer to improve the conductivity of the contact surface, and the male and female heads can be adapted to different power supply current capacity requirements by adjusting the length and diameter. They can be applied to all cable quick-connect requirements and have very strong versatility. The power cable quick-connect device 3 can be designed and produced in batches in a standardized manner, and different configurations can be changed according to different motor power requirements. It can effectively solve the power emergency connection needs of the LNG emergency pump in emergency situations of abnormal LNG cargo, gain more precious time for ship safety disposal measures, and play a role in the safe operation of LNG ships.

[0021] Junction box maintenance operations: During the navigation of the LNG ship, the equipment program detects the temperature in the junction box 1 through the temperature sensor 13 and compares it with the set value. The equipment program sets the working temperature to X1, X2, and X3, where X1 is the minimum value and X3 is the maximum value, which can be adjusted according to specific needs. The rotation speeds of the two sets of electric fan blades are V1, V2, and V3, where V1 is the minimum value and V3 is the maximum value, which can be adjusted according to specific needs. When the equipment program detects that the temperature value in the junction box 1 is X1 through the temperature sensor 13, the equipment program determines it as the normal working temperature, and the equipment program controls the rotation speed of the two sets of electric fan blades to V1, which assists in the heat dissipation and cooling operation of the junction box 1 to avoid overheating. When the temperature sensor 13 detects that the temperature value in the junction box 1 is X2, the device program determines that the junction box 1 has been running for a long time and the temperature is overheated. The device program controls the rotation speed of the two sets of electric fan blades to increase to V2, increases the air flow rate, performs heat dissipation and cooling operations on the junction box 1, and quickly reduces the temperature of the junction box 1 to ensure the normal operation of the cable. When the device program detects that the temperature value in the junction box 1 is X3 through the temperature sensor 13, the device program determines that the temperature of the junction box 1 is too high due to high temperature weather or direct sunlight during navigation. The device program controls the rotation speed of the two sets of electric fan blades to increase to V3, speeds up air circulation, and quickly performs heat dissipation and cooling operations on the junction box 1 to avoid safety accidents caused by high temperature of the cable and ensure navigation safety. After the LNG ship has sailed for a long time, the salty and humid moisture and seawater in the sea breeze will corrode the surface and installation screws of the junction box 1, and the staff needs to clean it daily to ensure that it can be used normally. The equipment program detects the value of the humidity sensor 109 and compares it with the set value. The equipment program sets the humidity value to K1, which can be adjusted according to specific needs. The cleaning time is T1 and T2, which can be modified according to specific needs. When the equipment program detects that the humidity value is K1 through the humidity sensor 109, the equipment program determines that the sea breeze is humid and water vapor will corrode the junction box 1. At this time, the equipment program controls the built-in electric valves of the four groups of cleaning nozzles to open, and the speed of the two groups of electric fan blades is adjusted to V3. The anti-rust liquid is discharged from the four groups of cleaning nozzles. The equipment program controls the cleaning time to be T1. When the T1 time is up, the equipment program controls the built-in electric valves of the two sets of second cleaning nozzles 106 to be closed, and the two sets of first cleaning nozzles 105 continue to spray the anti-rust liquid to flush the connection between the five sets of cable access pipes and the junction box 1. When the T2 time is up, the equipment program controls the built-in electric valves of the two sets of first cleaning nozzles 105 to be closed. After completing the above cleaning operation, the equipment program controls the ventilation and dehumidification operation. The ventilation time is T3 (which can be modified according to specific needs). When the T3 time is up, the equipment program controls the rotation speed of the two sets of electric fan blades to return to the original value (the rotation speed before adjustment). By using the temperature sensor 13 in conjunction with two sets of electric fan blades, the heat dissipation speed can be adjusted according to the different working temperatures to ensure that the junction box 1 itself will not malfunction due to overheating. At the same time, it can prevent the junction box 1 from being directly exposed to the sun and causing it to be high temperature, thereby ensuring safety during navigation. By using the humidity sensor 109 in conjunction with four sets of cleaning nozzles, the interface of the cable access pipe body can be cleaned to prevent seawater from corroding the pipe body connection and causing it to rust and break. At the same time, the fixing nuts on the junction box cover 2 can also be cleaned to prevent seawater from rusting the nuts, thereby increasing the service life of the junction box 1. While cleaning, the air flow rate can be accelerated to prevent water vapor from accumulating inside the protective box 10, thereby reducing the cost consumption during the navigation of the ship and ensuring the safety of the ship during navigation.

[0022] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0023] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A quick-connect device for an emergency pump motor power supply of an LNG carrier, comprising a junction box (1), characterized in that: Three sets of motor cable access tubes (11) are fixedly mounted on one end of the junction box (1), two sets of main power cable access tubes (12) are fixedly mounted on the other end of the junction box (1), and a junction box cover plate (2) is detachably mounted on the top of the junction box (1); A power cable quick-connect device (3) is also provided inside the junction box (1). The power cable quick-connect device (3) can be detachably installed in three groups of motor cable access tubes (11) and two groups of main power cable access tubes (12). The power cable quick-connect device (3) includes a power supply cable fixed stuffing box (4), a cable compression stuffing box (5), a clip-on stuffing box (6), a cable quick-connect female connector (7), a cable quick-connect male connector (8), and a wiring copper busbar (9). The power supply cable fixed stuffing box (4) is detachably mounted on the inner wall of the power cable quick connection device (3); the cable compression stuffing box (5) is detachably mounted on one end of the power cable quick connection device (3); the clamping stuffing box (6) is detachably mounted on one side of the cable compression stuffing box (5); the cable quick connection female head (7) is fixedly welded inside the power cable quick connection device (3); the cable quick connection male head (8) is detachably mounted in the cable quick connection female head (7); the cable quick connection male head (8) is used in conjunction with the cable quick connection female head (7); the wiring copper bar (9) is fixedly mounted on one end of the cable quick connection female head (7); the cable quick connection male head (8) and the cable quick connection female head (7) are both made of silver-plated aluminum alloy material; and a temperature sensor (13) is fixedly mounted on one side of the interior of the junction box (1).

2. According to claim 1, a LNG carrier emergency pump motor power supply quick connection device is characterized in that: A first fixing seat (21) is detachably mounted on the junction box cover plate (2), a first magnetic fixing block (22) is fixedly mounted inside the first fixing seat (21), a protection box (10) is detachably mounted on the top of the junction box (1), two groups of electric fan blades are arranged on both sides of the box body of the protection box (10), namely, a first electric fan blade (101) and a second electric fan blade (102), a water tank (103) is fixedly mounted on the top of the protection box (10), a collecting pipe (104) is arranged on the water tank (103), the pipe mouth of the collecting pipe (104) is arranged inside in an inclined shape, an electric valve (1041) is fixedly mounted inside the collecting pipe (104), and a humidity sensor (109) is fixedly mounted on one side of the top of the protection box (10).

3. The LNG carrier emergency pump motor power supply quick connection device according to claim 2 is characterized in that: Two groups of first cleaning nozzles (105) are fixedly installed on one side of the interior of the protection box (10), and the two groups of the first cleaning nozzles (105) correspond to the positions of the five groups of cable access pipes. Two groups of second cleaning nozzles (106) are fixedly installed on the other side of the interior of the protection box (10), and the two groups of the second cleaning nozzles (106) correspond to the positions of the junction box cover plate (2).

4. The LNG carrier emergency pump motor power supply quick connection device according to claim 3 is characterized in that: A second fixing seat (107) is provided at the inner top of the protective box (10), and a second magnetic fixing block (108) is fixedly mounted on the second fixing seat (107). The position of the second fixing seat (107) corresponds to that of the first fixing seat (21), and the second magnetic fixing block (108) cooperates with the first magnetic fixing block (22).

5. The LNG carrier emergency pump motor power supply quick connection device according to claim 4 is characterized in that: The protection box (10) is provided with a built-in pipeline to connect the water tank (103) and four groups of cleaning nozzles, and the four groups of cleaning nozzles are provided with built-in electric valves.

6. The LNG carrier emergency pump motor power supply quick connection device according to claim 5, characterized in that: The junction box (1) and the junction box cover plate (2) are both made of stainless steel (316).

7. The LNG carrier emergency pump motor power supply quick connection device according to claim 6, characterized in that: The interior of the junction box (1) is hollow.

8. The LNG carrier emergency pump motor power supply quick connection device according to claim 7, characterized in that: The junction box (1) is placed on the deck of the LNG cargo tank.

9. A method for quickly connecting the power supply of an emergency pump motor of an LNG carrier, applicable to the quick connection device described in any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Before the staff needs to perform the cable docking operation, the staff first performs the pre-installation operation on the junction box (1). The staff pre-installs the two sets of power cable quick-connect devices (3) into the two sets of main power cable access pipes (12). Then the staff inserts the ship power station power supply cable through the power supply cable fixed stuffing box (4) through the two sets of main power cable access pipes (12) into the main power cable junction box, and then inserts the clip-on stuffing box (6) to fix the cable, and then inserts the cable compression stuffing box (5) to compress the cable. After the two sets of main power cables are connected, there is no need to disassemble and assemble them. At this time, the staff performs the motor cable quick-connection operation; S2. The staff first holds the motor cable and installs the cable quick-connect male connector (8) at the joint of the motor cable. Then, they manually unscrew the cable compression stuffing box (5), pass the motor cable through the cable compression stuffing box (5), and insert it into the power cable quick-connect device (3) so that the cable quick-connect male connector (8) contacts the cable quick-connect female connector (7). Then, they tighten the cable compression stuffing box (5) to complete the quick-connect operation.

Images