A low-voltage switchgear for ocean-going ships

Abstract

The present invention relates to the field of power distribution technology, and specifically discloses a low-voltage switchgear for ocean-going ships, comprising: a cabinet body, electrical components and a vacuum circuit breaker, wherein the electrical components and the vacuum circuit breaker are both arranged in the cabinet body, and the vacuum circuit breaker comprises an insulating shell, a shielding cylinder, a first conductive rod, a second conductive rod, a cleaning mechanism, a support seat and a partition plate, the shielding cylinder is slidably fitted in the insulating shell, the support seat is rotatably fitted in the bottom of the insulating shell, the top of the support seat extends into the shielding cylinder, and a collecting groove is provided at the top of the support seat, which can push the shielding cylinder to move upward when the support seat rotates, and the partition plate is fixedly connected in the shielding cylinder, and a gap is provided between the side wall of the partition plate and the inner wall of the shielding cylinder; the vacuum circuit breaker in the low-voltage switchgear for ocean-going ships of the present invention can scrape off metal impurities attached to the shielding cylinder when an arcing phenomenon occurs during circuit breaker operation, and can also discharge the scraped metal impurities out of the shielding cylinder and collect them in the collecting groove to prevent the metal impurities from interfering with the shielding cylinder.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution, and in particular to a low-voltage switchgear for ocean-going ships. Background Art

[0002] The electrical systems of ocean-going vessels must meet a variety of complex and changing requirements, including power generation, distribution, motor control, lighting, and power supply for other auxiliary equipment. To ensure the safe and reliable operation of a vessel's electrical systems, appropriate switchgear and protective equipment are essential. Low-voltage switchgear, a key component of the power distribution system, is responsible for distributing electrical energy and protecting lines and equipment.

[0003] Vacuum circuit breakers, as switching and protection devices, can quickly interrupt fault currents and prevent accidents from escalating. Therefore, integrating vacuum circuit breakers into low-voltage switchgear can effectively protect and control a ship's electrical systems. When a vacuum circuit breaker interrupts a circuit, it arcs, generating a large amount of metal vapor and liquid droplets.

[0004] A Chinese patent document with authorization publication number CN113363109B discloses an intelligent high-voltage vacuum circuit breaker, which includes a shielding system, a contact system, and a cleaning system; the shielding system includes a ceramic shell and a shielding cylinder; the contact system includes a static end conductive rod, a static contact, a dynamic end conductive rod, a dynamic contact, and a bellows; the cleaning system consists of two cleaning rings and a connecting rod.

[0005] In the aforementioned vacuum circuit breaker, when the movable end conductive rod moves downward, the connecting rod drives the two cleaning rings downward. During this downward movement, the cleaning rings scrape the inner wall of the shield tube adjacent to the movable and static contacts, reducing the accumulation of metal impurities on the inner wall of the shield tube adjacent to the movable and static contacts. Furthermore, the cleaning rings are coated with a zirconium-aluminum coating. When the movable and static contacts arc, high temperatures are generated. This high temperature activates the zirconium-aluminum coating on the cleaning rings, resulting in air absorption properties that absorb metal vapor generated during arcing, ensuring a high vacuum within the ceramic housing. However, after cleaning the metal impurities from the inner wall of the shield tube, the metal impurities accumulate within the shield tube. Over time, these metal impurities may hinder heat dissipation, causing the temperature inside the shield to rise, thereby affecting the performance and lifespan of the device. Furthermore, these impurities may alter the electromagnetic shielding performance of the shield, reducing its ability to protect against external electromagnetic interference. Furthermore, in the aforementioned vacuum circuit breaker, there is a risk that droplets generated by the contacts during arcing may splash onto the cleaning device. Excessive accumulation of metal impurities on the cleaning device may also affect iron removal. Summary of the Invention

[0006] The present invention provides a low-voltage switchgear for ocean-going vessels, aiming to solve the problem in the related art that excessive accumulation of metal impurities in the shielding tube of a vacuum circuit breaker affects equipment performance.

[0007] The low-voltage switchgear for ocean-going vessels of the present invention comprises: a cabinet body, electrical components and a vacuum circuit breaker;

[0008] The electrical components and the vacuum circuit breaker are both arranged in the cabinet, and the electrical components and the vacuum circuit breaker are electrically connected;

[0009] The vacuum circuit breaker includes an insulating shell, a shielding tube, a first conductive rod, a second conductive rod, a cleaning mechanism, a support seat and a partition plate. The shielding tube slides in the insulating shell, the support seat rotates in the bottom of the insulating shell, the top of the support seat extends into the shielding tube, and the top of the support seat is provided with a collecting groove. When the support seat rotates, it can push the shielding tube to move upward. The partition plate is fixedly connected in the shielding tube, and there is a gap between the side wall of the partition plate and the inner wall of the shielding tube. The upper surface of the partition plate is truncated cone-shaped. The upward movement of the shielding tube can drive the partition plate to open the collection groove, and metal impurities can slide along the partition plate and enter the collection groove from the gap between the partition plate and the shielding tube.

[0010] Beneficial effects: Under normal conditions, the first conductive rod and the second conductive rod are both located in the shielding tube, and the two are in contact with each other and electrically connected. When the current is too large, the first conductive rod moves downward and disconnects from the second conductive rod, and arcing will occur when the connection is disconnected. Metal droplets will be generated during the arcing process, and the metal droplets will splash onto the inner wall of the shielding tube. After the metal droplets solidify, metal impurities will form and adhere to the inner wall of the shielding tube. The cleaning mechanism can scrape off the impurities attached to the shielding tube, and the scraped metal impurities will fall on the partition plate. The support seat drives the shielding tube to move upward, and the partition plate is disengaged from the support seat when the shielding tube moves upward. Since there is a gap between the side of the partition plate and the support seat, the metal impurities scattered on the partition plate can enter the collection box through the gap between the partition plate and the support seat. After cleaning, the shielding tube is reset, so that the partition plate is again fitted with the support seat, thereby closing the collection box and preventing the metal impurities in the collection box from affecting the shielding tube.

[0011] Preferably, a mating hole is provided at the axis of the support seat, the first conductive rod is slidably fitted in the mating hole, a spiral groove is provided on the side wall of the first conductive rod, and the support seat is provided with a slider on the inner wall of the mating hole, the slider is slidably fitted in the spiral groove, a push block is provided at the top of the support seat, and a plurality of grooves spaced apart along its circumference are provided at the bottom end of the shielding tube, the push block is a curved structure, and when the first conductive rod moves along its axial direction, the slider can slide along the spiral groove, thereby driving the support seat to rotate, and when the support seat rotates, the push block moves along the bottom surface of the groove, thereby periodically pushing the shielding tube to move upward.

[0012] Preferably, a limit seat is provided at the top of the shielding tube, and a plurality of stoppers are distributed at intervals along the circumference of the top of the shielding tube. A limit block is provided at the bottom of the limit seat, and the limit block is elastically connected to the limit seat. The limit block can be received in the limit seat, and the limit block can stop against the stop block, thereby limiting the rotation of the shielding tube.

[0013] The effect is that when the support seat rotates counterclockwise, the limit seat stops the shielding tube from rotating counterclockwise through the limit block and the stop block, thereby limiting the shielding tube from rotating counterclockwise. At this time, the push block can move along the bottom surface of the groove at the bottom of the shielding tube. When the curved surface structure of the stop block moves from the groove to the protrusion between two adjacent grooves, the push block can squeeze the shielding tube and push the shielding tube to move upward. When the push block moves from the protrusion between two adjacent grooves to the groove, the shielding tube can move downward and reset, thereby realizing the reciprocating up and down movement of the shielding tube.

[0014] Preferably, the cleaning mechanism includes a cleaning ring and a moving rod, the moving rod is slidably fitted on the second conductive rod, the moving rod can move along the axial direction of the second conductive rod, the cleaning ring is fixedly arranged at the bottom of the moving rod, the cleaning ring is abutted against the inner wall of the shielding tube, the top end of the moving rod is connected to the insulating shell through a first elastic member, and the first elastic member can push the moving rod to move downward.

[0015] The effect is that the cleaning ring is moved by the moving rod, and the cleaning ring can scrape the inner wall of the shielding cylinder during the movement, thereby scraping off metal impurities attached to the inner wall of the shielding cylinder.

[0016] Preferably, a limiting assembly is also provided at the top of the shielding tube, and the limiting assembly includes a first limiting plate and a second limiting plate, the first limiting plate and the second limiting plate are both annular structures, and are located on both sides of the moving rod, the first limiting plate and the second limiting plate are both connected to the shielding tube through a second elastic member, the limiting seat is provided with an inner edge, the first limiting plate and the second limiting plate are provided with an outer edge, the inner edge can be stopped with the outer edge, the moving rod is provided with a limiting groove, the first limiting plate and the second limiting plate are provided with a limiting protrusion, the limiting protrusion can extend into the limiting groove, thereby limiting the movement of the moving rod.

[0017] The effect is that the downward movement of the first conductive rod will drive the support seat to rotate counterclockwise, and the counterclockwise rotation of the support seat can drive the shielding tube to move up and down. The up and down movement of the shielding tube can make the inner edge of the limit seat disengage from the outer edges of the first limit plate and the second limit plate, and then the first limit plate and the second limit plate move outward under the drive of the second elastic member, and the limiting protrusion disengages from the limiting groove, releasing the limit on the moving rod, and the moving rod can move under the push of the first elastic member, so that the cleaning mechanism can be started after the first conductive rod is disconnected from the second conductive rod, and the side wall of the shielding tube can be cleaned.

[0018] Preferably, a delay groove is provided below the spiral chute, the delay groove is a straight groove, and extends along the axial direction of the first conductive rod. The delay groove is connected to the spiral chute, and the slider can move in the delay groove.

[0019] The effect is that when the first conductive rod is disconnected from the second conductive rod, it moves in the direction away from the second conductive rod. During the movement of the first conductive rod, the slider will first move in the delay groove. During this process, the support seat remains stationary. When the arcing phenomenon ends, the slider moves to the end of the delay groove and enters the spiral groove. At this time, the first conductive rod continues to move. The slider will move along the spiral groove and then push the support seat to rotate. By setting the delay groove, the cleaning mechanism remains stationary during the arcing process, and the shielding tube is not scraped until the arcing ends, so as to prevent the metal droplets generated during the arcing process from splashing onto the cleaning ring.

[0020] Preferably, the limiting groove is a spiral groove, and the limiting block and the stop block are both provided with a curved surface structure, so that the limiting block limits the shielding tube in one direction, and when the first conductive rod moves upward, the support seat drives the shielding tube to rotate synchronously, and the first limiting plate and the second limiting plate rotate synchronously with the shielding tube, and make the limiting protrusion move along the limiting groove, thereby pushing the moving rod to move upward and reset.

[0021] Preferably, a guide groove is provided on the second conductive rod, and the movable rod is slidably fitted in the guide groove and moves along the guide groove, and the guide groove is used to limit the moving range of the cleaning mechanism.

[0022] Preferably, the cabinet has a plurality of compartments, and each compartment can accommodate components with different functions.

[0023] Preferably, a mounting seat is provided in the cabinet, and the mounting seat is used to place the vacuum circuit breaker.

[0024] By adopting the above technical solution, the beneficial effects of the present invention are:

[0025] According to the invented low-voltage switchgear for ocean-going ships, electrical components and vacuum circuit breakers are both installed in the cabinet body. Under normal conditions, the first conductive rod and the second conductive rod are both located in the shielding tube, and the two are in contact with each other and electrically connected. When the current is too large, the first conductive rod moves downward and disconnects from the second conductive rod, and arcing occurs when the connection is disconnected. Metal droplets are generated during the arcing process, and the metal droplets will splash onto the inner wall of the shielding tube. After the metal droplets solidify, metal impurities will form and adhere to the inner wall of the shielding tube. The cleaning mechanism can scrape off the impurities attached to the shielding tube, and the scraped metal impurities will fall on the partition plate. The support seat drives the shielding tube to move upward. When the shielding tube moves upward, the partition plate is disengaged from the support seat. Since there is a gap between the side of the partition plate and the support seat, the metal impurities scattered on the partition plate can enter the collection box through the gap between the partition plate and the support seat. After cleaning, the shielding tube is reset, so that the partition plate is again fitted with the support seat, thereby closing the collection box to prevent the metal impurities in the collection box from affecting the shielding tube, thereby avoiding the replacement of the vacuum circuit breaker due to problems with the shielding tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front view of a low-voltage switchgear for ocean-going ships according to an embodiment of the present invention.

[0027] Figure 2 It is an assembly diagram of the mounting base and the vacuum circuit breaker according to an embodiment of the present invention.

[0028] Figure 3 4 is a cross-sectional view of a vacuum circuit breaker according to an embodiment of the present invention.

[0029] Figure 4 4 is a front view of the first conductive rod according to an embodiment of the present invention.

[0030] Figure 5 4 is a side view of the second conductive rod according to an embodiment of the present invention.

[0031] Figure 6 2 is a schematic diagram of the support base structure of an embodiment of the present invention.

[0032] Figure 7 2 is a front view of a partition plate according to an embodiment of the present invention.

[0033] Figure 8 It is a schematic diagram of the shielding tube structure of an embodiment of the present invention.

[0034] Figure 9 yes Figure 8 Enlarged view of point A in the middle.

[0035] Figure 10 2 is a schematic diagram of the limit seat structure of an embodiment of the present invention.

[0036] Figure 11 2 is a front view of a cleaning mechanism according to an embodiment of the present invention.

[0037] Figure 12 4 is a cross-sectional view of the first limiting plate according to an embodiment of the present invention.

[0038] Reference numerals:

[0039] 100, cabinet; 101, mounting base; 200, vacuum circuit breaker;

[0040] 1. Insulating shell; 2. Shielding tube; 21. Arc-shaped protrusion; 22. Stop block; 3. First conductive rod; 31. Spiral slide groove; 32. Delay groove; 4. Second conductive rod; 41. Guide groove; 5. Cleaning mechanism; 51. Moving rod; 511. Limiting groove; 52. Cleaning ring; 53. First elastic member; 6. Support seat; 61. Matching hole; 62. Slider; 63. Collecting groove; 64. Push block; 7. Partition plate; 71. Connecting block; 8. Limiting seat; 81. Limiting block; 82. Inner edge; 91. First limiting plate; 911. Limiting protrusion; 92. Second limiting plate; 93. Second elastic member; 94. Outer edge. DETAILED DESCRIPTION

[0041] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0042] like Figures 1 to 12 As shown, the low-voltage switchgear for ocean-going ships of the present invention includes: a cabinet body 100, electrical components and a vacuum circuit breaker 200. The cabinet body 100 is used to store the electrical components and the vacuum circuit breaker 200. The electrical components are placed in the cabinet body 100 and are electrically connected to each other through wires. The vacuum circuit breaker 200 is used to protect the electrical components and prevent excessive current from burning the electrical components.

[0043] Specifically, if Figure 1 and Figure 2As shown, the cabinet 100 has a plurality of compartments distributed at intervals, each compartment is provided with a movable door, each movable door is rotatably matched with the cabinet 100, and electrical components or vacuum circuit breakers 200 can be placed in the compartment. The movable door is used to close the compartment to prevent moisture or humid air from contacting the electrical components.

[0044] like Figures 1 to 3 As shown, a mounting base 101 is provided in some compartments of the cabinet 100, and the vacuum circuit breaker 200 is placed on the mounting base 101. The vacuum circuit breaker 200 includes an insulating shell 1, a shielding tube 2, a first conductive rod 3, a second conductive rod 4, a cleaning mechanism 5, a support base 6 and a partition plate 7. The shielding tube 2 is slidably fitted in the insulating shell 1, and the shielding tube 2 can move up and down or rotate relative to the insulating shell 1. The first conductive rod 3 is a moving end conductive rod, and its bottom end is electrically connected to the external wire. The first conductive rod 3 extends from the insulating shell 1 and the bottom end of the shielding tube 2 into the shielding tube 2, and the first conductive rod 3 can move up and down. The second conductive rod 4 is a static end conductive rod, which is fixed at the top end of the insulating shell 1, and the bottom end of the second conductive rod 4 extends into the shielding tube 2. The bottom end of the second conductive rod 4 can contact the top end of the first conductive rod 3, so that the two can be electrically connected, and the top end of the second conductive rod 4 is connected to the external wire.

[0045] like Figure 3 、 Figure 4 、 Figures 6 to 8As shown, the support seat 6 is located in the insulating shell 1 and is rotatably fitted in the bottom of the insulating shell 1. A fitting hole 61 is provided at the center of the support seat 6. The first conductive rod 3 slides in the fitting hole 61. The first conductive rod 3 is coaxially distributed with the support seat 6. A spiral groove 31 and a delay groove 32 are provided on the side wall of the first conductive rod 3. The delay groove 32 is a straight groove. The delay groove 32 is located below the spiral groove 31, and the top of the delay groove 32 is connected to the bottom end of the spiral groove 31. A slider 62 is provided on the inner wall of the fitting hole 61. The slider 62 slides and fits in the spiral groove 31 or the delay groove 32. The slider 62 can move along the spiral groove 31 and the delay groove 32. The top of the support seat 6 has an upwardly extending flange structure, and an inwardly recessed collecting groove 63 is provided at the center of the top surface of the support seat 6. The collecting groove 63 is a circular groove, and the top of the side wall of the collecting groove 63 has an inwardly inclined inclined surface structure. The side wall of the collecting groove 63 extends into the shielding tube 2 and is tightly attached to the inner wall of the shielding tube 2. The top surface of the support seat 6 is also provided with a plurality of push blocks 64, which are evenly spaced along the circumference of the support seat 6, and the top of each push block 64 is a curved surface structure. The bottom of the shielding tube 2 is provided with a plurality of arc-shaped protrusions 21 evenly spaced along its circumference, and a groove is formed between two adjacent arc-shaped protrusions 21. The length of the groove corresponds to the length of the push block 64. The push block 64 can extend into the groove, and the two side walls of the push block 64 can fit with the side walls of the groove. The top surface of the partition plate 7 is a truncated cone structure. The outer diameter of the partition plate 7 is smaller than the inner diameter of the shielding tube 2. The partition plate 7 is fixedly connected to the shielding tube 2 by a connecting block 71. The connecting block 71 is a prismatic structure with a triangular cross-section. There is a gap between the side of the partition plate 7 and the shielding tube 2. The partition plate 7 can stop at the top of the support seat 6, thereby closing the collection tank 63.

[0046] When the first conductive rod 3 contacts the second conductive rod 4, the slider 62 is located at the bottom end of the delay slot 32. When the first conductive rod 3 is disconnected from the second conductive rod 4, the first conductive rod 3 moves downward, and the slider 62 moves from the bottom end of the delay slot 32 to the top end of the delay slot 32. When the slider 62 enters the spiral slide groove 31, the first conductive rod 3 moves downward and will push the support seat 6 to rotate counterclockwise around the first conductive rod 3 through the slider 62. During the rotation of the support seat 6, the push block 64 will move along the arc-shaped protrusion 21, thereby continuously pushing the shielding tube 2 to move upward. The shielding tube 2 moves back and forth up and down in the insulating shell 1. When the shielding tube 2 moves upward, the partition plate 7 disengages from the top end of the support seat 6, thereby opening the collection slot 63. When the shielding tube 2 moves downward to the lowest point, the partition plate 7 stops at the top end of the support seat 6, and the collection slot 63 is closed.

[0047] like Figure 3 、 Figures 8 to 10As shown, a limit seat 8 is provided in the upper area of the insulating shell 1, and the limit seat 8 is fixedly arranged in the insulating shell 1. The bottom end of the limit seat 8 is provided with a plurality of limit blocks 81 evenly spaced along its circumference. The limit block 81 is elastically connected to the limit seat 8 through a spring. The limit block 81 slides with the limit seat 8, and the limit seat 8 can be retracted or extended from the limit seat 8. A stopper 22 is provided at the top of the shielding tube 2, and a plurality of stoppers 22 are evenly spaced along the circumference of the shielding tube 2. The limit block 81 can extend between two adjacent stoppers 22. A curved surface structure is provided on one side of the limit block 81, and a corresponding curved surface structure is provided on the stopper 22. The limit block 81 can It abuts against the stop block 22, thereby limiting the shielding tube 2 in one direction. When the support seat 6 rotates counterclockwise, the limit block 81 abuts against the stop block 22, thereby preventing the support seat 6 from driving the shielding tube 2 to rotate counterclockwise. The curved surface structure of the push block 64 can move along the circumferential direction relative to the annular groove at the bottom of the shielding tube 2, thereby intermittently pushing the shielding tube 2 to move upward. When the shielding tube 2 moves upward, it can press the limit block 81 into the limit seat 8. When the push block 64 moves to the groove, the spring pushes the limit block 81 out of the limit seat 8, and together with the gravity of the shielding tube 2, pushes the shielding tube 2 to move downward, thereby realizing the reciprocating up and down movement of the shielding tube 2.

[0048] like Figure 3 、 Figure 11 and Figure 12As shown, the cleaning mechanism 5 includes a cleaning ring 52 and a moving rod 51. The cleaning ring 52 is fixedly arranged at the bottom end of the moving rod 51. The moving rod 51 is a hollow structure. The moving rod 51 is sleeved on the second conductive rod 4. The side wall of the second conductive rod 4 is provided with a guide groove 41. The guide groove 41 extends along the axial direction of the second conductive rod 4. The moving rod 51 slides in the guide groove 41. The moving rod 51 can move up and down along the guide groove 41. The top of the moving rod 51 is elastically connected to the top surface of the insulating shell 1 through a first elastic member 53. The first elastic member 53 is a spring, and its two ends are respectively fixedly connected to the top end of the moving rod 51 and the top surface of the insulating shell 1. The bottom end of the moving rod 51 extends into the shielding tube 2. The side wall of the cleaning ring 52 is in contact with the inner wall of the shielding tube 2. When the moving rod 51 moves up and down, the cleaning ring 52 can scrape the inner wall of the shielding tube 2. A limiting assembly is provided on the shielding tube 2, and the limiting assembly includes a first limiting plate 91 and a second limiting plate 92. The first limiting plate 91 and the second limiting plate 92 are both semicircular ring plates. The first limiting plate 91 and the second limiting plate 92 are both slidably fitted on the top end of the shielding tube 2, and the two are symmetrically distributed. The first limiting plate 91 and the second limiting plate 92 are elastically connected to the shielding tube 2 through corresponding second elastic members 93 respectively. The second elastic member 93 is a spring. The first limiting plate 91 and the second limiting plate 92 can approach or move away from each other. When the first limiting plate 91 and the second limiting plate 92 stop, the first limiting plate 91 and the second limiting plate 92 can form a circular ring plate structure, and the inner wall of the circular ring plate structure fits with the outer wall of the moving rod 51. The top of the limiting seat 8 is provided with an inner edge 82 extending inward, with a gap between the inner edge 82 and the movable plate. The tops of the first limiting plate 91 and the second limiting plate 92 are both provided with an outer edge 94, which can extend into the gap between the inner edge 82 of the limiting seat 8 and the movable plate. The inner edge 82 of the limiting seat 8 presses the outer edges 94 of the first and second limiting plates 91, 92, thereby causing the first and second limiting plates 91, 92 to adhere tightly to the movable rod 51. The side wall of the movable rod 51 is provided with a limiting groove 511, which is a spiral groove. The inner walls of the first and second limiting plates 91, 92 are both provided with a limiting protrusion 911, which can extend into the limiting groove 511 and move along the limiting groove 511.

[0049] Under normal conditions, the first elastic member 53 is in a compressed state and applies a downward thrust to the moving rod 51. Since the bottom end of the shielding tube 2 is stopped against the support seat 6, the support seat 6 prevents the shielding tube 2 from moving downward, so that the first limit plate 91 and the second limit plate 92 cannot move downward. The outer edge 94 of the first limit plate 91 and the second limit plate 92 extends into the gap between the inner edge 82 of the limit seat 8 and the moving plate. The inner edge 82 of the limit seat 8 squeezes the outer edge 94 of the first limit plate 91 and the second limit plate 92, so that the first limit plate 91 and the second limit plate 92 are tightly attached to the moving rod 51, and the two limit protrusions 911 both extend into the limit groove 511, thereby preventing the moving rod 51 from moving downward. When the shielding tube 2 moves upward, the outer edges 94 of the first limiting plate 91 and the second limiting plate 92 move upward relative to the inner edge 82 of the limiting seat 8, and the outer edges 94 of the first limiting plate 91 and the second limiting plate 92 are disengaged from the inner edge 82 of the limiting seat 8. Under the action of the contraction elastic force of the second elastic member 93, the first limiting plate 91 and the second limiting plate 92 are disengaged from the moving rod 51, and the limiting protrusion 911 is disengaged from the limiting groove 511, releasing the limit on the moving rod 51. Under the action of the extension elastic force of the first elastic member 53, the moving rod 51 will move downward along the guide groove 41 and drive the cleaning ring 52 downward. When the shielding tube 2 moves back and forth, the outer edges 94 of the first and second limit plates 91, 92 are always located above the inner edge 82 of the limit seat 8. When the shielding tube 2 stops moving back and forth, the outer edges 94 of the first and second limit plates 91, 92 are restored to the same height as the inner edge 82 of the limit seat 8. At this time, the moving rod 51 moves downward to the limit, the limit protrusion 911 is aligned with the limit groove 511, and the limit protrusion 911 can be extended into the limit groove 511 again. When the first conductive rod 3 moves upward, the slider 62 moves in the spiral groove 31, and the first conductive rod 3 will drive the support seat 6 to move clockwise. Since the limit block 81 can only prevent the shielding tube 2 from rotating counterclockwise, the support seat 6 pushes the shielding tube 2 to rotate clockwise through the push block 64. The first limit plate 91 and the second limit plate 92 rotate clockwise synchronously with the shielding tube 2. The limit protrusion 911 moves along the limit groove 511 and overcomes the elastic force of the first elastic member 53 to push the moving rod 51 upward. The first elastic member 53 contracts and the cleaning mechanism 5 is reset.

[0050] The operating principle of the low-voltage switchgear for ocean-going vessels according to the present invention is as follows: Under normal conditions, the first conductive rod 3 and the second conductive rod 4 are in contact, electrically connected, with the cleaning ring 52 positioned above their contact point. When the current in the circuit becomes excessive, the first conductive rod 3 moves downward, breaking contact with the second conductive rod 4. This separation triggers arcing, and the resulting metal droplets splatter in all directions. Because the cleaning ring 52 is positioned above the contact point between the first and second conductive rods 3 and 4, no metal droplets splash onto the cleaning ring 52. When the first conductive rod 3 moves downward, the slider 62 moves in the delay groove 32 first, and the slider 62 moves from the bottom end of the delay groove 32 to the top end of the delay groove 32. When the slider 62 moves to the top end of the delay groove 32, the arcing phenomenon ends and no more metal dripping is generated. At this time, the first conductive rod 3 continues to move downward, and the slider 62 slides in the spiral slide groove 31, thereby driving the support seat 6 to rotate counterclockwise. The counterclockwise rotation of the support seat 6 will drive the shielding cylinder 2 to move up and down reciprocatingly. When the shielding cylinder 2 moves upward, the inner edge 82 of the limit seat 8 is disengaged from the outer edge 94 of the first limit plate 91 and the second limit plate 92, and in the subsequent up and down movement of the shielding plate, the inner edge 82 of the limit seat 8 is always located below the first limit plate 91 and the second limit plate 92. After the inner edge 82 of the limit seat 8 is disengaged from the outer edge 94 of the first limit plate 91 and the second limit plate 92, the first limit plate 9 is released. 1 and the second limiting plate 92 are limited. Under the contraction elastic force of the second elastic member 93, the first limiting plate 91 and the second limiting plate 92 move outward, and the limiting protrusion 911 is disengaged from the limiting groove 511, thereby releasing the limit on the moving rod 51. Under the extension elastic force of the first elastic member 53, the moving rod 51 moves downward, and the cleaning ring 52 moves downward synchronously, so as to scrape off the metal impurities formed after the metal droplets splashed onto the inner wall of the shielding tube 2 solidify. The metal impurities will fall onto the partition plate 7 under the action of gravity. In the process of reciprocating up and down movement of the shielding plate, it will drive the partition plate 7 to move up and down synchronously. When the partition plate 7 moves up and down, the metal impurities scattered on its upper surface can slide down along the inclined surface of the partition plate 7. When the partition plate 7 moves up and opens the collecting groove 63, the metal impurities can fall into the collecting groove 63 from the gap between the partition plate 7 and the shielding tube 2.When the moving rod 51 moves downward to the limit, the cleaning operation is completed. At this time, the outer edges 94 of the first limiting plate 91 and the second limiting plate 92 are at the same height as the inner edge 82 of the limiting seat 8. The inner edge 82 of the limiting seat 8 squeezes the first limiting plate 91 and the second limiting plate 92, so that the first limiting plate 91 and the second limiting plate 92 are tightly attached to the moving rod 51, and the limiting protrusion 911 extends into the limiting groove 511. Then the first conductive rod 3 moves upward. When the first conductive rod 3 moves upward, it can drive the support seat 6 clockwise through the slider 62. Rotate, the support seat 6 drives the shielding tube 2 to rotate clockwise, the first limit plate 91 and the second limit plate 92 rotate clockwise synchronously with the shielding tube 2, and slide along the limit groove 511 through the limit protrusion 911, thereby pushing the moving rod 51 to overcome the elastic force of the first elastic member 53 and move upward, the first elastic member 53 contracts, and the cleaning mechanism 5 is reset. When the first conductive rod 3 and the second conductive rod 4 stop, the vacuum circuit breaker 200 completes the reset and reconnects the circuit, and the electrical components connected to the vacuum circuit breaker in the cabinet 100 resume normal operation.

[0051] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A low-voltage switchgear for ocean-going vessels, comprising: Cabinets, electrical components and vacuum circuit breakers; The electrical components and the vacuum circuit breaker are both arranged in the cabinet, and the electrical components and the vacuum circuit breaker are electrically connected; The vacuum circuit breaker includes an insulating shell, a shielding cylinder, a first conductive rod, a second conductive rod and a cleaning mechanism; It is characterized in that a support seat and a partition plate are also provided in the vacuum circuit breaker, the shielding cylinder is slidably fitted in the insulating shell, the support seat is rotatably fitted in the bottom of the insulating shell, the top of the support seat extends into the shielding cylinder, and the top of the support seat is provided with a collecting groove, and the support seat can push the shielding cylinder to move upward when it rotates, and the partition plate is fixedly connected in the shielding cylinder, and there is a gap between the side wall of the partition plate and the inner wall of the shielding cylinder, and the upper surface of the partition plate is truncated cone-shaped, and the upward movement of the shielding cylinder can drive the partition plate to open the collecting groove, and metal impurities can slide along the partition plate and enter the collecting groove from the gap between the partition plate and the shielding cylinder.

2. The low-voltage switchgear for ocean-going vessels according to claim 1, characterized in that: A matching hole is provided at the axis of the support seat, the first conductive rod is slidably fitted in the matching hole, a spiral groove is provided on the side wall of the first conductive rod, and the support seat is provided with a slider on the inner wall of the matching hole, the slider is slidably fitted in the spiral groove, a push block is provided at the top of the support seat, and a plurality of grooves spaced along its circumference are provided at the bottom end of the shielding tube, the push block is a curved structure, when the first conductive rod moves along its axial direction, the slider can slide along the spiral groove, thereby driving the support seat to rotate, and when the support seat rotates, the push block moves along the bottom surface of the groove, thereby periodically pushing the shielding tube to move upward.

3. The low-voltage switchgear for ocean-going vessels according to claim 2, characterized in that: A limit seat is provided at the top end of the shielding tube, and a plurality of stoppers are provided at the top end of the shielding tube at intervals along its circumference. A limit block is provided at the bottom end of the limit seat, and the limit block is elastically connected to the limit seat. The limit block can be received in the limit seat, and the limit block can stop against the stopper, thereby limiting the rotation of the shielding tube.

4. The low-voltage switchgear for ocean-going vessels according to claim 3, characterized in that: The cleaning mechanism includes a cleaning ring and a moving rod, the moving rod is slidably fitted on the second conductive rod, the moving rod can move along the axial direction of the second conductive rod, the cleaning ring is fixedly arranged at the bottom of the moving rod, the cleaning ring is abutted against the inner wall of the shielding tube, the top end of the moving rod is connected to the insulating shell through a first elastic member, and the first elastic member can push the moving rod to move downward.

5. The low-voltage switchgear for ocean-going vessels according to claim 4, characterized in that: A limiting assembly is also provided at the top of the shielding tube, and the limiting assembly includes a first limiting plate and a second limiting plate. The first limiting plate and the second limiting plate are both annular structures and are located on both sides of the moving rod. The first limiting plate and the second limiting plate are both connected to the shielding tube through a second elastic member. An inner edge is provided on the limiting seat, and an outer edge is provided on the first limiting plate and the second limiting plate. The inner edge can stop against the outer edge. A limiting groove is provided on the moving rod, and a limiting protrusion is provided on the first limiting plate and the second limiting plate. The limiting protrusion can extend into the limiting groove, thereby limiting the movement of the moving rod.

6. The low-voltage switchgear for ocean-going vessels according to claim 5, characterized in that: A delay groove is provided below the spiral chute. The delay groove is a straight groove and extends along the axial direction of the first conductive rod. The delay groove is connected to the spiral chute, and the slider can move in the delay groove.

7. The low-voltage switchgear for ocean-going vessels according to claim 6, characterized in that: The limiting groove is a spiral groove, and the limiting block and the stop block are both provided with a curved surface structure, so that the limiting block limits the shielding tube in one direction. When the first conductive rod moves upward, the support seat drives the shielding tube to rotate synchronously, and the first limiting plate and the second limiting plate rotate synchronously with the shielding tube, and make the limiting protrusion move along the limiting groove, thereby pushing the moving rod to move upward and reset.

8. The low-voltage switchgear for ocean-going vessels according to claim 4, characterized in that: The second conductive rod is provided with a guide groove, the moving rod is slidably fitted in the guide groove and moves along the guide groove, and the guide groove is used to limit the moving range of the cleaning mechanism.

9. The low-voltage switchgear for ocean-going vessels according to claim 1, characterized in that: The cabinet body is provided with a plurality of compartments, and each compartment can be used to place electrical components with different functions.

10. The low-voltage switchgear for ocean-going vessels according to claim 9, characterized in that: A mounting seat is provided in the cabinet, and the mounting seat is used for placing the vacuum circuit breaker.

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