A terminal block for cryogenic liquid cargo pump

Abstract

The present invention discloses a terminal block for a cryogenic liquid cargo pump, which relates to the field of cryogenic liquid cargo pumps, and includes an insulating sleeve armor that is docked at the circuit port of the main liquid cargo pump, a terminal block body is threadedly connected to one side of the insulating sleeve armor, an end of the terminal block body away from the insulating sleeve armor is threadedly connected to an insulating sleeve B, the terminal block body is located on one side of the outer surface of the insulating sleeve armor and is surrounded by an insulating pad, a sealing pad is arranged between the terminal block body and the insulating pad, and between the insulating pad and the insulating sleeve armor, a terminal for connecting the circuit is fixedly arranged in the middle of the terminal block body, and crimping terminals for fixing the wire are fixedly arranged at both ends of the terminal block, and the crimping terminal on one side of the insulating sleeve armor is docked with the motor inside the main liquid cargo pump through the wire. The present invention fixes the wire through the covering setting of the terminal block, prevents the wire from being exposed to the outside too much, avoids the involvement of the connection seat, and improves the sealing effect at the same time, prevents short circuit, and thus ensures the normal operation of the motor.

Description

Technical Field

[0001] The invention relates to the field of cryogenic liquid cargo pumps, in particular to a terminal socket for cryogenic liquid cargo pumps. Background Art

[0002] Marine cryogenic liquid cargo pumps refer to pumps that can withstand low temperature environments and are used to transport cryogenic liquid cargoes on ships. They are mainly used for the transportation of cryogenic media such as liquefied natural gas (LNG) and liquefied petroleum gas (LPG). During ship transportation, these cryogenic liquids need to maintain their low temperature state to ensure safe transportation and storage. The structural structure of marine cryogenic liquid cargo pumps mainly includes pump head, cryogenic motor, outlet flange, cryogenic junction box, pump base, suction filter and other components. Among them, the pump head is the core component of marine cryogenic liquid cargo pumps, which is mainly composed of suction section, inducer, impeller, guide vane, middle section, cylinder, middle section, axial force balance mechanism. Marine cryogenic liquid cargo pumps are mainly used in the field of ship transportation, especially on LNG carriers and LPG carriers. With the adjustment of the global energy structure and the development of clean energy, the transportation demand for liquefied natural gas and liquefied petroleum gas is increasing, and the market demand for marine cryogenic liquid cargo pumps is also expanding, and the cryogenic motor needs to be connected to the external power supply wire at the connection end.

[0003] The motor in the cryogenic liquid cargo pump is connected to the external terminal through a wire. However, in actual use, 20 to 30 meters of wire must be reserved outside. If the connecting wire is too long, the pulling force on the connection will be too large, resulting in an unstable and easy loose connection, which in turn reduces the sealing of the connection seat and affects the use of the motor. Summary of the invention

[0004] In order to improve the problem that the existing low-temperature liquid cargo pump motor wires are too exposed to the outside and the pulling force is too large, thereby affecting the sealing of the connection seat, causing the wires to be damaged and short-circuited, and making the motor unable to operate normally, the present invention provides a terminal socket for a low-temperature liquid cargo pump.

[0005] The present invention provides a low-temperature liquid cargo pump terminal block adopts the following technical solution:

[0006] A terminal block for a cryogenic liquid cargo pump, comprising an insulating sleeve armor dockingly arranged at a circuit port of a main liquid cargo pump, a terminal block body being threadedly connected to one side of the insulating sleeve armor, an insulating sleeve B being threadedly connected to one end of the terminal block body away from the insulating sleeve armor, an insulating pad being arranged around one side of the terminal block body on the outer surface of the insulating sleeve armor, a sealing pad being arranged between the terminal block body and the insulating pad and between the insulating pad and the insulating sleeve armor, a sealing pad on one side of the insulating sleeve armor being sealingly connected to the top of the main liquid cargo pump, forming an integral sealed splicing of the insulating sleeve armor, the insulating pad, the terminal block body and the insulating sleeve B;

[0007] A terminal for connecting the circuit is fixedly arranged in the middle of the terminal block body, and crimping terminals for fixing the wires are fixedly arranged at both ends of the terminal block. The crimping terminal on one side of the insulating sleeve is connected to the motor inside the main liquid cargo pump through the wire;

[0008] A plurality of stop washers are arranged on one side of the wiring seat body, and bolts are arranged on the side of the plurality of stop washers away from the wiring seat body. The bolts are threadedly penetrated through the stop washers, the wiring seat body and the insulating pad in sequence to form an integral fixation.

[0009] By adopting the above technical solution, the terminal post is connected to the cryogenic liquid cargo pump and the external power supply end through two crimping terminals to form current flow. At the same time, the terminal block body fixes the terminal post, and the insulating sleeve A and the insulating sleeve B are respectively covered with the two crimping terminals to form insulation. Finally, the stop washer is sleeved on the surface of the insulating sleeve A, and a sealing treatment is formed through two sealing gaskets, so that the insulating gasket is respectively sealed and connected with the insulating sleeve A, the main liquid cargo pump and the terminal block body, thereby ensuring that the wires are connected and the wires are fixed at the same time.

[0010] Preferably, a ring groove is formed around the inner wall surface of the wiring seat body, and a plurality of T-shaped grooves are formed at the bottom of the ring groove of the wiring seat body, and the ends of the plurality of T-shaped grooves away from the ring groove all penetrate the inner wall of the wiring seat body to form interactive openings.

[0011] By adopting the above technical solution, the interactive port connects the inner wall of the terminal block body and the T-slot, so that the end of the subsequent T-shaped rod protrudes from the inner wall of the terminal block body. At the same time, the annular groove connects the inner wall of the terminal block body and the T-slot, thereby reserving movement space for the subsequent extrusion action of the rubber pad.

[0012] Preferably, the plurality of T-shaped slots are located on the opposite side of the interaction port and penetrate the outer surface of the terminal block body, and limit slots are provided on both sides of the inner wall, and the terminal block body is provided with a power connection cavity and an inflation cavity at the bottom of the two limit slots.

[0013] By adopting the above technical solution, the top of the T-shaped slot passes through the terminal block body, thereby reserving a plug-in space to facilitate the subsequent insertion of the disassembly plate, and then to form a seal with the top of the electrical cavity and the air-filled cavity. At the same time, the opening of the two limit slots reserves space for the subsequent movement of the insulating plate and the conductive plate, and limits the range of movement.

[0014] Preferably, a power connection box is fixedly provided in the power connection cavity, a conductive block 1 is fixedly provided at the through opening of the limit groove located in the power connection cavity, and a side of the conductive block 1 close to the power connection cavity is connected to the power connection box circuit.

[0015] By adopting the above technical solution, the conductive block 1 is connected to the electrical box, which facilitates the subsequent insertion of the conductive plate to transmit current.

[0016] Preferably, an inflation box is fixedly provided in the inflation cavity, and a conductive block 2 is fixedly provided at the through-opening of the inflation cavity located in the limiting groove, and a pin at one end of the conductive block 2 away from the power connection cavity penetrates and connects to the inside of the inflation box, and the inside of the inflation box is located on one side of the conductive block 2 and is connected to the power connection box circuit through an electric wire penetrating the terminal block body.

[0017] By adopting the above technical solution, one end of the inflation box is always connected to the power box, and the other end is disconnected from the power box. When both ends of the inflation box and the power box are connected, a conductive loop is formed, thereby releasing gas to provide gas support for the subsequent expansion of the airbag structure.

[0018] Preferably, the inflatable cavity is connected to the inner wall of the terminal block body on the side away from the power connection cavity, and the inner wall of the terminal block body is provided with a ring-shaped limiting protrusion protruding from the through-opening of the inflatable cavity, and an inflatable and expandable airbag is fixedly provided on the inner wall of the inflatable cavity at the position of the connecting opening.

[0019] By adopting the above technical solution, when the insulating sleeve is rotated into the terminal block body, the limiting protrusion protrudes to form a groove. At this time, the airbag receives gas and then expands in the groove formed by the limiting protrusion, thereby filling the gap between the insulating sleeve and the terminal block body and improving the sealing.

[0020] Preferably, T-shaped rods are rotatably arranged in the plurality of T-shaped grooves, elastically deformable rubber pads are fixedly arranged on the side of the plurality of T-shaped rods close to the annular groove, the side of the plurality of T-shaped rods close to the interaction port is arranged to be trapezoidal, and the trapezoidal ends of the plurality of T-shaped rods are inserted through the interaction port and protrude from the inner wall of the terminal block body.

[0021] By adopting the above technical solution, when the terminal is inserted into the terminal block body, the trapezoidal end of the T-shaped rod is contacted and squeezed, thereby pushing the trapezoidal end of the T-shaped rod into the interactive port. One end of the T-shaped rod is rotated around the rotating rod under the thrust, so that the rubber pad is squeezed out of the annular groove, fixing the terminal, while exhausting the air between the terminal and the terminal block body, forming a sealing effect.

[0022] Preferably, an insulating plate is disposed in contact with the other side of the trapezoidal end of the plurality of T-shaped rods, a conductive plate is disposed in contact with the top of each of the insulating plates, and both the insulating plate and the conductive plate are movably disposed in two limiting grooves.

[0023] By adopting the above technical solution, the T-shaped rod pushes the insulating plate to move in the limiting groove, and the insulating plate drives the conductive plate to move synchronously in the limiting groove. As the conductive plate moves to the top of the limiting groove, it abuts against the two ends of conductive block one and conductive block two, thereby forming a line connection and transmitting the current in the junction box to the inflation box.

[0024] Preferably, both ends of the plurality of T-slot channels are provided with rotation grooves, and rotation rods are rotatably arranged in the two rotation grooves, and the surfaces of the rotation rods penetrate and are fixedly connected with the T-rods.

[0025] By adopting the above technical solution, the rotating groove and the rotating rod are movably abutted to reserve space for the rotation of the rotating rod, and the rotating rod is inserted into the rotating groove to form a limiting effect.

[0026] Preferably, the terminal block body is located at both ends of the power connection cavity, and slots are provided at positions aligned with the rotating groove, and crimping plates are movably inserted in the two slots, the bottoms of the two crimping plates are abutted against the surface of the rotating rod, and disassembly plates are fixed on the tops of the two crimping plates, and the disassembly plates are movably inserted into the top of the inner wall of the T-shaped slot.

[0027] By adopting the above technical solution, the disassembly plate is pulled out from the T-slot, which makes it convenient for personnel to maintain the power box, inflation box and airbag inside the terminal block body through the T-slot. At the same time, the pulling out of the disassembly plate drives the crimping plate to be pulled out from the slot, so that the rotating rod moves upward along the rotating groove, driving the T-rod to move, thereby canceling the fixation of the terminal post and forming a detachable state, which is convenient for maintenance and replacement.

[0028] In summary, the present invention includes at least one of the following beneficial technical effects:

[0029] 1. The two ends of the terminal block body are connected to the insulating sleeve A and the insulating sleeve B respectively, so as to insulate the terminal post. At the same time, the insulating pad is set on the outer surface of the insulating sleeve A, and the insulating sleeve A and the terminal block body are sealed by two sealing pads, and the insulating pad and the terminal block body are sealed, so that the terminal block body is fixed on the surface of the liquid cargo pump as a whole, thereby fixing one end of the wire, which not only prevents the wire pulling force from being too large to affect the sealing of the connection seat, but also avoids damage caused by pulling the wire, thereby ensuring the normal operation of the motor;

[0030] 2. When installing the terminal and the terminal block body, a thrust is applied to the T-bar. The T-bar rotates to form a rubber pad that is pressed into the ring groove to form a seal between the terminal block body and the insulating sleeve B. At the same time, the conductive plate is energized to expand the airbag, filling the gap between the terminal block body and the insulating sleeve A to form a seal. Furthermore, the rubber pad applies pressure to the terminal to fix it, thereby fixing the wire inside the terminal block body, filling the gap at both ends of the terminal block body as a whole, forming a sealed power-on environment for the wire, thereby avoiding short circuits. Finally, as the disassembly plate is pulled out and plugged in, the T-bar is in an active state, which is convenient for replacing the terminal, airbags, power connection boxes and other sealing devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a three-dimensional schematic diagram of embodiment 1 of the present invention;

[0032] Figure 2 It is a three-dimensional exploded view of the present invention;

[0033] Figure 3 It is a front cross-sectional view of the present invention;

[0034] Figure 4 This is a schematic diagram of the installation position of the wiring seat body and the disassembly plate of Example 2 of the present invention;

[0035] Figure 5 It is a cross-sectional view of the connecting seat of the present invention;

[0036] Figure 6 This is an enlarged view of point A of the present invention;

[0037] Figure 7 This is a diagram showing the internal structure of the connecting socket of the present invention.

[0038] Reference numerals: 1, insulating sleeve; 2, sealing pad; 3, insulating pad; 4, terminal;

[0039] 5. Terminal block body; 51. Ring groove; 52. T-shaped groove; 53. Rotation groove; 54. Interaction port; 55. Power connection cavity; 56. Slot; 57. Inflatable cavity; 58. Limiting groove; 59. Limiting convex port;

[0040] 6. Insulating sleeve B; 7. Stop washer; 8. Bolt; 9. T-shaped rod; 10. Rotating rod; 11. Rubber pad; 12. Insulating plate; 13. Conductive plate; 14. Electrical connection box;

[0041] 15. Conductive block 1; 16. Conductive block 2; 17. Inflatable box; 18. Air bag; 19. Disassembly plate; 20. Crimping plate; 21. Crimping terminal. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-Figure 7 The present invention is described in further detail.

[0043] The embodiment of the invention discloses a terminal socket for a cryogenic liquid cargo pump.

[0044] Example 1

[0045] Reference Figure 1 , Figure 2 , Figure 3A terminal block for a cryogenic liquid cargo pump comprises an insulating sleeve 1 which is docked at the circuit port of the main liquid cargo pump. The insulating sleeve 1 is made of epoxy resin material and has excellent insulation properties at low temperatures. The bottom of the insulating sleeve 1 is plugged into the circuit port of the main liquid cargo pump. The top outer surface of the insulating sleeve 1 is provided with threads. One end of the thread of the insulating sleeve 1 is connected to a terminal block body 5. A through hole is provided inside the terminal block body 5, and threads are provided on both ends of the inner wall of the through hole, so that the insulating sleeve 1 is threadedly connected to the terminal block body 5. At the same time, an end of the terminal block body 5 away from the insulating sleeve 1 is threadedly connected with an insulating sleeve 6. A sealing gasket 2 is fixedly provided on the side surface of the terminal block body 5 located at one end of the insulating sleeve 1. An insulating pad 3 is fixedly connected to the side of the sealing gasket 2 away from the terminal block body 5. The insulating pad 3 is away from one end of the terminal block body 5, and a sealing gasket 2 is fixedly provided between the insulating sleeve 1 and the insulating sleeve 1.

[0046] It should be noted that the insulating sleeve A 1, the insulating cushion block 3 and the insulating sleeve B 6 are all aligned with through holes inside, and the insulating cushion block 3 is in a state of being covered and sleeved on the outer surface of the insulating sleeve A 1. The terminal post 4 is detachably provided on the inner wall of the through hole of the terminal block body 5. The terminal post 4 is made of conductive material, and the two ends of the terminal post 4 are located in the through holes of the insulating sleeve A 1 and the insulating sleeve B 6 and are screwed with crimping terminals 21. The two crimping terminals 21 are respectively connected to the motor inside the main liquid cargo pump and the external power supply mechanism through wires. At the same time, a plurality of L-shaped stop washers 7 are abutted against the bottom of the side surface of the terminal block body 5 (there are at least four stop washers 7, which are distributed at the four corners of the side surface of the terminal block body 5), and a bolt 8 is fixed to the end of the stop washer 7 away from the terminal block body 5, and the rod of the bolt 8 passes through the stop washer 7, the terminal block body 5 and the insulating cushion block 3 in sequence and is located on the outside, thereby forming an overall fixation.

[0047] The two crimping terminals 21 are respectively connected to the two ends of the terminal post 4, so that the external power supply mechanism is connected to the motor of the main liquid cargo pump, and the terminal post 4 is fixed inside the terminal block body 5, thereby forming an overall fixation of the circuit. At the same time, the insulating sleeve A 1 and the insulating sleeve B 6 are threadedly connected to the two ends of the terminal block body 5, and the insulating sleeve A 1 is inserted at the interface of the main liquid cargo pump, and the insulating sleeve B 6 is surrounded by the interface of the external circuit, so that the two crimping terminals 21 are initially sealed to prevent current leakage and play an insulating effect. The insulating gasket 3 is surrounded by the outer surface of the insulating sleeve A 1, and the insulating gasket 3 and the insulating sleeve A 1, and the insulating gasket 3 and the terminal block body 5 are connected with a sealing gasket 2, thereby improving the overall sealing of the terminal block, and the bolt 8 is inserted through the terminal block body 5, and the insulating gasket 3 is fixed to one side of the top of the main liquid cargo pump, so that the terminal block is fixed to the main liquid cargo pump as a whole.

[0048] The implementation principle of a terminal block for a cryogenic liquid cargo pump in an embodiment of the present invention is as follows: first, a person inserts an insulating sleeve 1 into the interface of a main liquid cargo pump, and one of the crimping terminals 21 is crimped and fixed to the line copper wire at the motor end in the main liquid cargo pump, and the line copper wire is reserved with a length of 10 to 20 cm so that it can be extended for crimping and fixing, and then the insulating pad 3 is sealed and connected to the terminal block body 5 through the sealing pad 2, and the through hole of the insulating pad 3 is sleeved and plugged with the outer surface of the insulating sleeve 1. When the insulating pad 3 is in contact with the outer surface of the main liquid cargo pump, the sealing pad 2 is fixed again at the contact point of the insulating pad 3 to form a seal, and then the conductive plate 13 end of the crimping terminal 21 is fixed to one end of the terminal 4 through a screw;

[0049] At this time, the connecting seat is installed vertically and longitudinally on the top of the main liquid cargo pump as a whole, so that the terminal block body 5 is located on the top, and the stop washer 7 is placed against the surface of one side of the top of the terminal block body 5, and then the bolt 8 is used to penetrate the stop washer 7, the terminal block body 5 and the insulating pad 3 to fix it with the main liquid cargo pump, and then the terminal post 4 is inserted into the through hole of the terminal block body 5 to fix the terminal post 4. Another crimping terminal 21 is fixed to one end of the top of the terminal post 4 by a screw, and the wire crimped by the other crimping terminal 21 extends 2~3m to connect with the external power supply device. Finally, the top of the terminal block body 5 is threadedly connected with an insulating sleeve 6, and the remaining parts of the wires are respectively placed in the insulating sleeve 6, and then the crimping terminal 21 on the top is surrounded to form insulation while maintaining sealing, and the installation of the terminal block is completed.

[0050] Example 2

[0051] The "up, down, left, right" viewing angles of this device are Figure 4 The directions in the attached drawings are taken as reference.

[0052] Reference Figure 4-Figure 7 , the difference between this embodiment and embodiment 1 is that an annular ring groove 51 is opened inwardly at the middle of the inner wall of the through hole of the wiring block body 5, and a plurality of T-shaped grooves 52 (the number of T-shaped grooves 52 is at least three) are opened inwardly at the bottom of the ring groove 51 again, and an interactive opening 54 is opened below the other end of the plurality of T-shaped grooves 52 relative to the ring groove 51, and the interactive opening 54 penetrates the inner wall of the wiring block body 5 to form a connection, and the upper end of the plurality of T-shaped grooves 52 is located at the upper end of the interactive opening 54 and penetrates the outer surface of the wiring block body 5 to communicate with the outside, and a disassembly plate 19 is inserted at the upper through opening, and the disassembly plate 19 is inserted into the wiring block body 5 from the upper through opening, and at the same time, the inner wall of the T-shaped groove 52 is located at both ends of one side of the upper through opening, and both limit grooves 58 are opened inwardly;

[0053] A limiting groove 58 near the insulating sleeve 1 is provided with an inflatable cavity 57, which penetrates and communicates with the inner wall of the wiring seat body 5 (such as Figure 5As shown in the figure, the through openings of the multiple inflatable cavities 57 are all glued and fixed with inflatable and stretchable air bags 18, and the terminal block body 5 is located at the through openings of the multiple inflatable cavities 57. The limiting protrusions 59 are arranged around the protrusions. The limiting protrusions 59 and the inner wall of the terminal block body 5 form an annular groove, and the groove width is consistent with the thickness of the threaded port of the insulating sleeve A 1. Among them, a limiting groove 58 close to the insulating sleeve B 6 is opened inwardly with a power connection cavity 55, and the inflatable cavity 57 and the top of the power connection cavity 55 are both connected to the through opening of the T-shaped groove 52.

[0054] It should be noted that slots 56 are provided on both sides of the top of the T-slot 52, and a rotation slot 53 is provided in the transverse slot that penetrates through the bottom of the T-slot 52, and the disassembly plate 19 is fixed with a crimping plate 20 at the position of the two slots 56, and the bottoms of the two crimping plates 20 are concave and set as arc surfaces. The two crimping plates 20 are movably inserted into the two slots 56, and the ends extend to the range of the rotation slot 53.

[0055] Reference Figure 4 , Figure 5 , Figure 6 A T-shaped rod 9 is rotatably arranged in the T-shaped groove 52. A rubber pad 11 is fixedly connected to the position of the T-shaped rod 9 at the annular groove 51. The rubber pad 11 is arc-shaped and has the same arc as the annular groove 51. A trapezoidal convex surface is arranged at one end of the T-shaped rod 9 at the interactive opening 54. Under normal conditions, the T-shaped rod 9 is horizontally connected to the T-shaped groove 52, so that the trapezoidal convex surface of the T-shaped rod 9 extends from the interactive opening 54 to the inner wall of the terminal block body 5. Rotating rods 10 are fixedly arranged on both sides of the middle part of the T-shaped rod 9 at the positions of the rotating groove 53, and the two ends of the rotating rod 10 are respectively movably abutted against the bottoms of the two rotating grooves 53;

[0056] An insulating plate 12 is movably abutted against one side of the rotating rod 10 above the limit groove 58, and a conductive plate 13 is movably abutted against the upper end surface of the insulating plate 12. Both ends of the insulating plate 12 and the conductive plate 13 are provided with protrusions, and the protrusions at both ends are limitedly plugged into the limit groove 58, so that the insulating plate 12 and the conductive plate 13 can be longitudinally moved and set in the two limit grooves 58.

[0057] It should be noted that the conductive plate 13 is made of copper and has conductivity. Under normal circumstances, the insulating plate 12 and the conductive plate 13 are located at the bottom of the two limit grooves 58. The two limit grooves 58 and the through-openings of the power connection cavity 55 and the inflation cavity 57 are respectively fixed with conductive blocks 15 and 16. A power connection box 14 is fixed in the power connection cavity 55. The positive terminal of the power connection box 14 is connected to the conductive block 15 through a copper wire. An inflation box 17 is fixed in the inflation cavity 57. The inflation box 17 is filled with sodium azide. A pin is fixed at one end of the conductive block 2 16, and the pin penetrates the inside of the inflation box 17 and contacts with sodium azide. At the same time, the negative terminal of the power connection box 14 penetrates the terminal block body 5 and the inflation box 17 in sequence through a wire and contacts with sodium azide.

[0058] The terminal 4 is inserted through the through hole of the terminal block body 5. As the terminal 4 is inserted, a thrust is applied to the trapezoidal end of the T-shaped rod 9, thereby pushing the T-shaped rod 9 as a whole from the interactive opening 54 into the T-shaped groove 52, and the T-shaped rod 9 uses the rotating rod 10 as a fulcrum, so that the T-shaped rod 9 rotates around the rotating rod 10, thereby applying an outward thrust to the rubber pad 11, pushing the rubber pad 11 into the annular groove 51. Under normal circumstances, the outer surface of the rubber pad 11 abuts against the inner wall of the annular groove 51. When at least three rubber pads 11 are pressed into the annular groove 51, they abut against each other to form a seal, and as the rubber pad 11 is continuously pressed out, the air in the annular groove 51 is discharged from the direction of the insulating sleeve 6. When the terminal 4 is fully inserted into the terminal block body 5, the rubber pad 11 is fully pressed into the annular groove 51, thereby discharging the gas in the annular groove 51 and fixing the terminal 4 at the same time.

[0059] The T-shaped rod 9 rotates to make one side of the top T-shaped protrusion move upward, applying thrust to the bottom of the insulating plate 12, and the insulating plate 12 moves along the two limit grooves 58. The movement of the insulating plate 12 drives the conductive plate 13 to move synchronously. When the conductive plate 13 moves to the top of the limit groove 58, the negative line in the power box 14 is always connected, and the protrusions at both ends of the conductive plate 13 are respectively abutted against the conductive block 15 and the conductive block 2 16 to form a positive line connection, thereby transmitting current to the inside of the inflation box 17, and the sodium azide substance in the inflation box 17 is energized to generate gas, and the gas is discharged from the air outlet at the bottom of the inflation box 17 into the inflation cavity 57, thereby filling the airbag 18 to form expansion, and the airbag 18 is located in the groove formed by the limit protrusion 59 and expands, thereby filling the gap between the insulating sleeve 1 and the terminal block body 5 to form a secondary seal.

[0060] Among them, the device also includes a power connection box 14, an air bag 18, a motor in the main liquid cargo pump and an external power supply device, which are all existing technologies, and their structural principles will not be repeated.

[0061] The implementation principle of the second embodiment is as follows: when using the device, the personnel need to insert the connected terminal 4 through the through hole on the side of the terminal block body 5 close to the insulating sleeve 6, and as the terminal 4 is inserted, it abuts against the trapezoidal end of the T-shaped rod 9, thereby pressing the trapezoidal end of the T-shaped rod 9 back into the interactive opening 54, and the pressing of the trapezoidal surface of the T-shaped rod 9 causes one end of the T-shaped rod 9 to be lifted, and at the same time, the middle part of the T-shaped rod 9 is fixedly connected with the rotating rod 10 to form a fulcrum, and the rotating rod 10 is rotatably arranged in the rotating groove 53, so that the T-shaped rod 9 as a whole rotates around the rotating rod 10 as the center;

[0062] Then, a thrust is applied to the rubber pad 11 at the other end to push the rubber pad 11 into the annular groove 51. The three rubber pads 11 arranged on the inner wall of the terminal block body 5 abut against each other to form a ring. As multiple rubber pads 11 are continuously pushed in, the air in the annular groove 51 is discharged to the outside, forming a sealed connection between the insulating sleeve 6 and the terminal block body 5, and the rubber pad 11 is pressed into the outer surface of the terminal post 4 to abut against it to form a fixation, thereby fixing the terminal post 4 in the terminal block body 5.

[0063] At the same time, as the T-shaped rod 9 rotates, an upward thrust is applied to the bottom of the insulating plate 12, so that the insulating plate 12 moves upward along the limiting groove 58, thereby pushing the conductive plate 13 to move synchronously. When the conductive plate 13 moves to the top of the limiting groove 58, the two ends of the conductive plate 13 are respectively in contact with the conductive block 15 and the conductive block 2 16, thereby forming a connection with the positive end of the circuit of the power connection box 14. At this time, the power connection box 14 is connected with the external power generation end through the wire, and the current is transmitted from the conductive block 15 and the conductive plate 13 to the conductive block 2 16 in sequence, and the current at the pin end of the conductive block 2 16 flows back to the power connection box 14 from the wire responsible for the negative pole, thereby forming a circuit;

[0064] When the current passes through the inflation box 17 and contacts the sodium azide substance, a large amount of gas is generated to fill the airbag 18, causing the airbag 18 to expand and fill the gap between the insulating sleeve 1 and the terminal block body 5 to form a seal, and then the power supply of the power connection box 14 is cut off, thereby sealing and connecting both ends of the terminal block body 5.

[0065] When the terminal block needs maintenance, the personnel pull out the disassembly plate 19 from the T-slot 52, thereby exposing the power connection cavity 55 and the inflation cavity 57 to the outside. The personnel can directly replace the power connection box 14, conductive block 15, conductive block 2 16, inflation box 17 and airbag 18 in the power connection cavity 55 and the inflation cavity 57, which is convenient for maintenance. As the disassembly plate 19 is pulled out, the two crimping plates 20 are pulled out of the slot 56, thereby canceling the fixation of the rotating rod 10. At this time, the rotating rod 10 is lifted and moved along the rotating groove 53, so that the T-bar 9 moves upward as a whole, driving the rubber pad 11 to be retracted from the annular groove 51, canceling the fixation of the terminal 4, thereby facilitating personnel to disassemble and replace.

[0066] The above are only optional embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A terminal block for a cryogenic liquid cargo pump, characterized in that: It includes an insulating sleeve armor that is docked at the circuit port of the main liquid cargo pump, one side of the insulating sleeve armor is threadedly connected to a terminal block body, one end of the terminal block body away from the insulating sleeve armor is threadedly connected to an insulating sleeve B, the terminal block body is located on one side of the outer surface of the insulating sleeve armor and is surrounded by an insulating pad, a sealing gasket is sealed between the terminal block body and the insulating pad, and between the insulating pad and the insulating sleeve armor, and the sealing gasket on one side of the insulating sleeve armor is sealed and connected to the top of the main liquid cargo pump, forming an integral sealed splicing of the insulating sleeve armor, the insulating pad, the terminal block body and the insulating sleeve B; A terminal for connecting the circuit is fixedly arranged in the middle of the main body of the terminal block, and crimping terminals for fixing the wires are fixedly arranged at both ends of the terminal block. The crimping terminal on one side of the insulating sleeve is connected to the motor inside the main liquid cargo pump through the wire; The inner wall surface of the wiring block body is surrounded by an annular groove, and the wiring block body is provided with a plurality of T-shaped grooves at the bottom of the annular groove, and the ends of the plurality of T-shaped grooves away from the annular groove all penetrate the inner wall of the wiring block body to provide an interactive opening; A plurality of T-shaped grooves are located on the opposite side of the interactive port and penetrate the outer surface of the wiring seat body, and limit grooves are provided on both sides of the inner wall, and the wiring seat body is provided with a power connection cavity and an air filling cavity at the bottom of the two limit grooves; The inflatable cavity is far away from the power connection cavity and penetrates the inner wall of the wiring seat body. The inner wall of the wiring seat body is located at the through-opening of the inflatable cavity and is provided with an annular limiting protrusion. The inner wall of the inflatable cavity is located at the position of the communication opening and is fixed with an inflatable and expandable airbag. T-shaped rods are rotatably arranged in the plurality of T-shaped grooves, and elastically deformable rubber pads are fixed on the sides of the plurality of T-shaped rods close to the annular grooves, and the sides of the plurality of T-shaped rods close to the interactive openings are arranged in a trapezoidal shape, and the trapezoidal ends of the plurality of T-shaped rods penetrate the interactive openings and protrude from the inner wall of the wiring seat body; Both ends of the multiple T-slot channels are provided with rotation grooves, and rotation rods are rotatably arranged in the two rotation grooves, and the surfaces of the rotation rods penetrate and are fixedly connected with the T-rods; The main body of the terminal block is located at both ends of the power connection cavity, and slots are provided at positions aligned with the rotating grooves. Crimping plates are movably inserted in the two slots. The bottoms of the two crimping plates abut against the surface of the rotating rod. Disassembly plates are fixed on the tops of the two crimping plates, and the disassembly plates are movably inserted into the top of the inner wall of the T-shaped slot.

2. The terminal socket for a cryogenic liquid cargo pump according to claim 1, characterized in that: An electric connection box is fixedly arranged in the electric connection cavity, and a conductive block 1 is fixedly arranged at the through opening of the electric connection cavity at the limiting groove, and a side of the conductive block 1 close to the electric connection cavity is connected with the electric connection box circuit.

3. The terminal socket for a cryogenic liquid cargo pump according to claim 1, characterized in that: An inflatable box is fixedly arranged in the inflatable cavity, and a conductive block 2 is fixedly arranged at the through-opening of the inflatable cavity with a limiting groove. The pin at one end of the conductive block 2 away from the power connection cavity penetrates and connects to the inside of the inflatable box. The inside of the inflatable box is located on one side of the conductive block 2 and is connected to the circuit of the power connection box through an electric wire penetrating the terminal block body.

4. The terminal socket for a cryogenic liquid cargo pump according to claim 1, characterized in that: An insulating plate is abutted against the other side of the trapezoidal end of the plurality of T-shaped rods, a conductive plate is abutted against the top of the insulating plate, and the insulating plate and the conductive plate are both movably arranged in the two limiting grooves.

5. The terminal socket for a cryogenic liquid cargo pump according to claim 1, characterized in that: A stop washer is arranged on one side of the bottom of the terminal block body, and a bolt is arranged on the side of the stop washer away from the terminal block body. The bolt threadably penetrates the stop washer, the terminal block body and the insulating pad in sequence to form an integral fixation.

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