Vacuum circuit breaker ring network cabinet

Abstract

The application belongs to the technical field of ring main unit, and particularly relates to a vacuum circuit breaker ring main unit, which comprises a ring main unit body and a shielding panel movably arranged on the ring main unit body, side plates A and B are arranged on the two sides of the ring main unit body respectively, an installation plate is arranged on the ring main unit body, a baffle is arranged on the outer side of the installation plate, vertical plates are slidably arranged on the side plates A and B; the vacuum circuit breaker ring main unit can drive the limiting hooks on the vertical plates to synchronously descend through the spline shaft of the adjusting mechanism and the embedded ring cooperation, the connecting frame of the synchronous descending mechanism and the abutting strips that abut against each other, and realize the synchronous unlocking of the shielding panels on the multiple ring main unit bodies, the male buckle on the side plate A and the female buckle on the side plate B are matched, the convex blocks on the limiting blocks are combined, the quick connection of the multiple ring main unit bodies can be stably realized, the sliding frame and the cross rod of the reset sliding assembly are used to make the limiting blocks shrink, the limitation on the male buckle can be removed, and the quick disassembly is realized.

Description

Technical Field

[0001] This invention belongs to the field of ring main unit technology, specifically relating to a vacuum circuit breaker ring main unit. Background Technology

[0002] A ring main unit (RMU) is a high-voltage switchgear used in power distribution networks to achieve ring network power supply. It is mainly composed of components such as circuit breakers, load switches, disconnect switches, and instrument transformers, and typically adopts a metal-enclosed or non-metal-enclosed structure. It can distribute high-voltage power to different distribution lines and has the functions of connecting, disconnecting, and protecting against faults. It is named for its suitability for flexibly switching power supply paths in ring distribution networks.

[0003] Currently, when multiple vacuum circuit breaker ring main units are installed in parallel, they are mostly fixed with multiple screws. However, this method has problems such as complex and cumbersome operation, and difficulty in consistent screw tightening. This leads to poor connection stability of the ring main unit and difficulty in accurately controlling the heat dissipation gap. If the heat dissipation gap is too small, it will affect heat dissipation and equipment lifespan; if the heat dissipation gap is too large, the structure will be unstable and there will be safety hazards. At the same time, the existing ring main unit shielding panels either lack an effective locking mechanism, making them easy to accidentally open and causing component contamination and safety risks, or although they have a locking mechanism, unlocking is inconvenient. When multiple units are connected for maintenance, they must be unlocked one by one, which is cumbersome and prolongs the maintenance time, affecting the efficiency of maintenance and emergency repair. To address these issues, a vacuum circuit breaker ring main unit is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a vacuum circuit breaker ring main unit that is easy to assemble and disassemble in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions:

[0006] A vacuum circuit breaker ring main unit includes a ring main unit body and a shielding panel movably mounted on the ring main unit body. Side plates A and B are respectively provided on both sides of the ring main unit body. An mounting plate is provided on the ring main unit body. A baffle is provided on the outside of the mounting plate. Vertical plates are slidably mounted on both side plates A and side plates B.

[0007] It also includes:

[0008] A synchronous descent mechanism, which is mounted on the mounting plate, is used to drive the vertical plate to descend.

[0009] A plurality of limiting blocks are provided and are respectively slidably disposed on side plate A and side plate B;

[0010] A pulling mechanism, which is mounted on the mounting plate, is used to drive the limiting block to retract;

[0011] An adjustment mechanism is provided, which is installed on the baffle plate, and the pulling mechanism and the synchronous lowering mechanism are adjusted by the adjustment mechanism.

[0012] As a further optimization of the present invention, the synchronous descent mechanism includes a connecting frame, with fixed plates fixedly installed at both ends of the connecting frame. The fixed plates are fixedly connected to the upright plate. A spring is installed between the fixed plate and the main body of the ring main unit. A track is fixedly installed on the mounting plate. A contact strip is slidably installed on the track. Adjacent contact strips abut against each other. A rack is fixedly installed on the contact strip. A connecting rod is installed between the contact strip and the connecting frame. The two ends of the connecting rod are respectively hinged to the connecting frame and the contact strip. A horizontal shaft is rotatably installed on the mounting plate. A gear is fixedly installed on the horizontal shaft. The gear meshes with the rack.

[0013] As a further optimization of the present invention, the pulling mechanism includes a cam, a rotating sleeve fixedly mounted on the cam, a connecting rod two hinged to the cam, a reciprocating rod hinged to the connecting rod two slidably mounted on the baffle, a through groove one opened on the reciprocating rod, a plurality of limiting rods one provided on the baffle, the limiting rods one slidably mounted in the through groove one, a pull rod hinged to one end of the reciprocating rod, an avoidance groove opened on the mounting plate, the pull rod slidably mounted on the mounting plate through the avoidance groove, a connecting rod three hinged to one end of the pull rod, and a reset sliding assembly connected to the pull rod through the connecting rod three.

[0014] As a further optimization of the present invention, the reset sliding assembly includes a sliding frame, which is slidably mounted on the side plate B. A through groove 2 is provided on the sliding frame. A limiting rod 2 is fixedly mounted on the side plate B. The limiting rod 2 is slidably mounted through the through groove 2. A crossbar is fixedly mounted on the sliding frame. A spring 2 is provided between the sliding frame and the main body of the ring main unit.

[0015] As a further optimization of the present invention, the limiting block is provided with a protrusion, the limiting block is slidably disposed on the side plate B through the protrusion, one side of the protrusion is rounded, the limiting block is provided with an inclined groove, and the crossbar is slidably disposed in the inclined groove.

[0016] As a further optimization of the present invention, the adjusting mechanism includes a spline sleeve, which is rotatably mounted through a baffle. A rotating sleeve is rotatably mounted on the spline sleeve. A spline shaft is slidably mounted in the spline sleeve. An embedded ring is fixedly mounted on the spline shaft. A locking block A is arrayed on the outer surface of the embedded ring. A sleeve cup is fixedly mounted on both the horizontal shaft and the rotating sleeve. A locking block B is arrayed on the inner surface of the sleeve cup. The sleeve cups are located on both sides of the embedded ring. The sleeve cups are movably connected to the embedded ring. A ratchet mechanism is provided on the spline sleeve.

[0017] As a further optimization of the present invention, the ratchet mechanism includes a ratchet, the ratchet is fixedly mounted on a spline sleeve, a pawl is rotatably mounted on the baffle, a spring is provided between the pawl and the baffle, and the pawl is movably connected to the ratchet.

[0018] As a further optimization of the present invention, a male buckle is fixedly provided on the side plate A, and a female buckle is fixedly provided on the side plate B. One end of the female buckle has an opening, the male buckle and the female buckle have corresponding structures, and the limiting block is located at the end of the female buckle with the opening.

[0019] As a further optimization of the present invention, the upright plate is provided with a plurality of limiting hooks, and both the side plate A and the side plate B are provided with through grooves, and the limiting hooks are slidably disposed in the through grooves.

[0020] As a further optimization of the present invention, a limiting groove is provided on the shielding panel, and the limiting hook is embedded in the limiting groove.

[0021] The beneficial effects of this invention are as follows:

[0022] 1. Unlike existing technologies, during maintenance, the splined shaft of the adjustment mechanism works with the embedded ring to drive the limit hooks on the vertical plate to descend synchronously through the connecting frame of the synchronous descent mechanism and the mutually abutting contact strips, thereby enabling the synchronous unlocking of the shielding panels on the main body of multiple ring main units, which greatly improves the preparation efficiency before maintenance.

[0023] 2. Unlike existing technologies, when merging cabinets, the male buckle on side panel A and the female buckle on side panel B, combined with the protrusion on the limiting block, can stably and quickly connect the main bodies of multiple ring main units. By resetting the sliding frame and crossbar of the sliding component, the limiting block is shrunk, which can release the restriction on the male buckle and realize quick disassembly. The fixed gap between the male and female buckles makes the gap between adjacent ring main units constant, and effectively simplifies the cabinet assembly operation during installation and maintenance. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the assembly structure used in this invention;

[0025] Figure 2 This is a schematic diagram of the disassembly structure of the shielding panel of the present invention;

[0026] Figure 3 This is the present invention. Figure 2 Enlarged structural diagram at point A in the middle;

[0027] Figure 4 This is the present invention. Figure 2 Another perspective structural diagram;

[0028] Figure 5 This is the present invention. Figure 4 Enlarged structural diagram at point B;

[0029] Figure 6 This is the present invention. Figure 2 Explosion structure diagram;

[0030] Figure 7 This is a cross-sectional view of the mounting plate of the present invention;

[0031] Figure 8 This is the present invention. Figure 7 Enlarged structural diagram at point C;

[0032] Figure 9 This is the present invention. Figure 7 Enlarged structural diagram at point D;

[0033] Figure 10 This is a schematic diagram of the connection structure of the adjustment mechanism of the present invention;

[0034] Figure 11 This is the present invention. Figure 10 Schematic diagram of the exploded structure.

[0035] In the diagram: 1. Ring main unit; 11. Side panel A; 111. Male buckle; 12. Side panel B; 121. Female buckle; 13. Baffle; 14. Mounting plate; 141. Clearance groove; 2. Covering panel; 21. Limiting groove; 3. Vertical plate; 31. Limiting hook; 32. Through slide groove; 4. Synchronous lowering mechanism; 41. Connecting frame; 411. Fixing plate; 412. Spring 1; 42. Abutment strip; 421. Rack; 422. Rail; 43. Connecting rod 1; 44. Horizontal shaft; 441. Gear; 5. Pulling mechanism; 51. Cam; 511. Rotating sleeve; 52. 53. Linkage 2; 54. Reciprocating rod; 55. Through groove 1; 56. Limiting rod 1; 57. Pull rod; 58. Linkage 3; 59. Reset sliding assembly; 50. Sliding frame; 51. Through groove 2; 52. Limiting rod 2; 53. Crossbar; 54. Spring 2; 555. Limiting block; 61. Protrusion; 62. Inclined groove; 7. Adjusting mechanism; 71. Spline sleeve; 72. Spline shaft; 73. Embedded ring; 731. Snap-fit ​​block A; 74. Sleeve cup; 741. Snap-fit ​​block B; 8. Ratchet mechanism; 81. Ratchet; 82. Pad; 83. Spring 3. Detailed Implementation

[0036] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0037] Example: Figure 1 - Figure 11 As shown, a vacuum circuit breaker ring main unit includes a ring main unit body 1 and a shielding panel 2 movably mounted on the ring main unit body 1. Side plates A11 and B12 are respectively provided on both sides of the ring main unit body 1. A male buckle 111 is fixedly mounted on side plate A11, and a female buckle 121 is fixedly mounted on side plate B12. One end of the female buckle 121 has an opening. When multiple vacuum circuit breaker ring main units are spliced ​​together, the male buckle 111 slides into the female buckle 121 on adjacent ring main unit bodies 1. A mounting plate 14 is fixedly installed on the main body 1 of the ring main unit. A baffle 13 is installed on the outer side of the mounting plate 14. The two ends of the baffle 13 are connected to side plate A11 and side plate B12 respectively. A vertical plate 3 is slidably installed on both side plate A11 and side plate B12. Multiple limit hooks 31 are installed on the vertical plate 3. A through groove 32 is opened on both side plate A11 and side plate B12. The limit hooks 31 are slidably installed in the through groove 32. A limit groove 21 is opened on the shielding panel 2. The limit hooks 31 are embedded in the limit groove 21. In the slot 21, the mounting plate 14 is equipped with a synchronous lowering mechanism 4, which drives the upright plate 3 to descend. Multiple limiting blocks 6 are slidably disposed through the side plates A11 and B12, respectively. Each limiting block 6 is located at the open end of the female buckle 121. Each limiting block 6 is equipped with a protrusion 61, which slidably disposes of it on the side plate B12. One side of the protrusion 61 is rounded. A slanted groove 62 is formed on the limiting block 6. The mounting plate 14 is equipped with a pull mechanism. Mechanism 5 drives the limit block 6 to retract through the pulling mechanism 5. The baffle 13 is equipped with an adjustment mechanism 7, which adjusts the pulling mechanism 5 and the synchronous lowering mechanism 4. The male buckle 111 and the female buckle 121 facilitate the parallel connection of multiple ring network cabinets. The limit hook 31 and the limit groove 21 lock the shielding panel 2. The limit block 6 can limit the male buckle 111 after the cabinets are connected. The adjustment mechanism 7 enables flexible control of the pulling mechanism 5 and the synchronous lowering mechanism 4, making the overall operation more convenient.

[0038] like Figure 5 and Figure 9As shown, the synchronous lowering mechanism 4 includes a connecting frame 41, with fixed plates 411 fixedly installed at both ends of the connecting frame 41. The two fixed plates 411 are respectively fixedly connected to two upright plates 3. A spring 412 is installed between the fixed plate 411 and the main body 1 of the ring main unit. A track 422 is fixedly installed on the mounting plate 14, and an abutment strip 42 is slidably installed on the track 422. The abutment strips 42 of adjacent vacuum circuit breaker ring main units abut against each other. A rack 421 is fixedly installed on the abutment strip 42. A connecting rod 43 is installed between the abutment strip 42 and the connecting frame 41. The two ends of the connecting rod 43 are respectively connected to the connecting frame 41. The frame 41 is hinged to the abutment bar 42. A horizontal shaft 44 is rotatably mounted on the mounting plate 14. A gear 441 is fixedly mounted on the horizontal shaft 44. The gear 441 meshes with the rack 421. The connecting frame 41 and the fixed plate 411 can drive the upright plate 3 to move synchronously. Spring 412 can realize the automatic reset of the upright plate 3. The track 422 ensures that the abutment bar 42 slides smoothly. Adjacent abutment bars 42 abut against each other to achieve synchronous movement. The meshing of gear 441 and rack 421 accurately transmits power. The connecting rod 43 converts the lateral movement of the abutment bar 42 into the descent of the connecting frame 41, making the descent of the upright plate 3 more stable and efficient.

[0039] like Figure 5 , Figure 8 and Figure 10 As shown, the pulling mechanism 5 includes a cam 51, a rotating sleeve 511 fixedly mounted on the cam 51, a connecting rod 52 hinged to the cam 51, a reciprocating rod 53 slidably mounted on the baffle 13 and hinged to the connecting rod 52, a through groove 531 formed on the reciprocating rod 53, two limiting rods 532 fixedly mounted on the baffle 13 and slidably mounted in the through groove 531, a pull rod 54 hinged to one end of the reciprocating rod 53, and an clearance groove 141 formed on the mounting plate 14. Rod 54 is slidably mounted on mounting plate 14 through clearance groove 141. One end of rod 54 is hinged to connecting rod 3 541. Rod 54 is connected to reset sliding assembly 55 through connecting rod 3 541. The rotation of cam 51 can effectively drive the movement of connecting rod 2 52. Limiting rod 1 532 cooperates with through groove 1 531 to ensure the stability of the sliding direction of reciprocating rod 53. Clearance groove 141 provides space for the sliding of rod 54. The hinged connection of each link realizes the effective transmission of power, making the pulling action smoother and more precise.

[0040] like Figure 7 - Figure 8As shown, the reset sliding assembly 55 includes a sliding frame 551, which is slidably mounted on the side plate B12. A through groove 552 is provided on the sliding frame 551. A limiting rod 553 is fixedly mounted on the side plate B12 and is slidably mounted through the through groove 552. A crossbar 554 is fixedly mounted on the sliding frame 551 and is slidably mounted through the inclined groove 62. A spring 555 is provided between the sliding frame 551 and the main body 1 of the ring main unit. The limiting rod 553 and the through groove 552 ensure that the sliding frame 551 slides smoothly. The crossbar 554 and the inclined groove 62 cooperate to convert the descent of the sliding frame 551 into the retraction of the limiting block 6. The spring 555 realizes the automatic reset of the sliding frame 551 and the limiting block 6, simplifying the operation process.

[0041] like Figure 10 - Figure 11 As shown, the adjusting mechanism 7 includes a spline sleeve 71, which is rotatably mounted on the baffle 13. A rotating sleeve 511 is rotatably mounted on the spline sleeve 71. A spline shaft 72 is slidably mounted in the spline sleeve 71. A handwheel is provided at one end of the spline shaft 72 located outside the baffle 13. The spline shaft 72 is pushed and pulled by rotating the handwheel. An embedded ring 73 is fixedly mounted on the spline shaft 72. A locking block A731 is arrayed on the outer surface of the embedded ring 73. The locking blocks A731 have sharp corners at both ends. The horizontal shaft 44 and the rotating sleeve 511 are both fixedly mounted on... A sleeve cup 74 is provided, and a series of locking blocks B741 are arranged on the inner surface of the sleeve cup 74. The outer end of the locking block B741 is set with a sharp corner. The two sleeve cups 74 are located on both sides of the embedded ring 73, and the sleeve cups 74 are movably connected to the embedded ring 73. The cooperation between the spline sleeve 71 and the spline shaft 72 ensures the transmission of rotational power and allows the spline shaft 72 to slide. The locking block A731 of the embedded ring 73 is movably connected to the locking block B741 of the sleeve cup 74, which can flexibly switch the adjustment object and realize the separate control of the pulling mechanism 5 and the synchronous lowering mechanism 4.

[0042] like Figure 10 - Figure 11 As shown, a ratchet mechanism 8 is provided on the spline sleeve 71. The ratchet mechanism 8 includes a ratchet 81, which is fixedly mounted on the spline sleeve 71. A pawl 82 is rotatably mounted on the baffle 13. A spring 83 is provided between the pawl 82 and the baffle 13. The pawl 82 is movably connected to the ratchet 81. The ratchet 81 and the pawl 82 cooperate to achieve unidirectional rotation restriction. The spring 83 ensures that the pawl 82 and the ratchet 81 are in close contact, which can prevent the synchronous lowering mechanism 4 from moving in the opposite direction during operation, ensuring that the limit hook 31 is stably in the lowering position and improving the reliability of operation.

[0043] It should be noted that when multiple vacuum circuit breaker ring main units are connected in parallel, the male buckle 111 on the side plate A11 of one vacuum circuit breaker ring main unit is aligned with the female buckle 121 on the side plate B12 of another vacuum circuit breaker ring main unit, and then the male buckle 111 is pushed into the female buckle 121. During this pushing process, the male buckle 111 will come into contact with the rounded protrusion 61 on the limiting block 6 and generate pressure. As the male buckle 111 continues to push, it will force the limiting block 6 to slide into the side plate B12 until the male buckle 111 completely passes the limiting block 6. At this time, the limiting block 6 is no longer pressured and returns to its initial position under the action of its own related reset structure, thus limiting the male buckle 111 that has entered the female buckle 121 and preventing the male buckle 111 from accidentally sliding out of the female buckle 121, thereby completing the parallel connection of multiple vacuum circuit breaker ring main units.

[0044] During daily use, when it is necessary to open the cover panel 2 for maintenance, the operation procedure is as follows: First, operate the spline shaft 72 in the adjustment mechanism 7 to push the embedded ring 73 on the spline shaft 72 toward the sleeve cup 74 located on the horizontal shaft 44 of the synchronous lowering mechanism 4, so that the locking blocks A731 arrayed on the outer surface of the embedded ring 73 and the locking blocks B741 arrayed on the inner surface of the sleeve cup 74 engage with each other, realizing the docking of the embedded ring 73 and the sleeve cup 74; then rotate the spline shaft 72. Due to the locking action of the locking blocks A731 and B741, the rotation of the spline shaft 72 will drive the horizontal shaft 44 to rotate together; when the horizontal shaft 44 rotates, the gear 441 fixed on it will also rotate accordingly. The rack 421 fixedly mounted on the abutment bar 42 meshes with the rack 421. Driven by the gear 441, the rack 421 drives the abutment bar 42 to move laterally on the track 422 on the mounting plate 14. Because adjacent abutment bars 42 abut against each other, when the currently rotating gear 441 pushes the corresponding abutment bar 42 to move laterally, it will push other abutment bars 42 to move laterally in sequence. During the lateral movement of the abutment bar 42, a pulling force is generated on the connecting frame 41 through the connecting rod 43. The two ends of the connecting rod 43 are hinged to the connecting frame 41 and the abutment bar 42 respectively. This connection method allows the lateral movement of the abutment bar 42 to be converted into the downward movement of the connecting frame 41. When the connecting frame 41 descends, the fixing plates 411 fixed at both ends of it... The vertical plate 3 will descend accordingly, and since the fixed plate 411 is fixedly connected to the vertical plate 3, the vertical plate 3 will also descend. At the same time, the fixed plate 411 will compress the spring 412 set between it and the main body 1 of the ring main unit, causing the spring 412 to deform. During the descent of the vertical plate 3, the multiple limiting hooks 31 set on it will slide down along the through grooves 32 opened on the side plates A11 and B12. When the limiting hooks 31 descend to a certain position and separate from the limiting grooves 21 opened on the shielding panel 2, the shielding panels 2 on multiple main bodies 1 of the ring main units are unlocked simultaneously. The shielding panels 2 can then be lifted up and removed for maintenance. During this process, the ratchet mechanism 8 will play a role. The ratchet 81, which is fixedly connected to the spline sleeve 71, rotates with the spline sleeve 71. The pawl 82, which is rotatably set on the baffle 13, cooperates with the ratchet 81 under the elastic force of the spring 3 83, restricting the gear 441 from rotating in the opposite direction, thereby ensuring that the limit hook 31 can be stably in the lowered position. When the maintenance work is completed and the shielding panel 2 needs to be reinstalled, the embedded ring 73 is separated from the sleeve cup 74, the gear 441 is released from restriction, the compressed spring 1 412 will restore its deformation, and generate an upward elastic force to push the fixing plate 411 to rise, thereby driving the connecting frame 41, the upright plate 3 and the limit hook 31 to reset. The limit hook 31 is re-embedded in the limit groove 21 of the shielding panel 2, completing the fixation of the shielding panel 2.

[0045] When it is necessary to separate the main body 1 of the ring main unit that has been merged, the operation method is as follows: the embedded ring 73 on the spline shaft 72 is pulled into the cup 74 on the rotating sleeve 511 by the adjusting mechanism 7, so that the locking block A731 and the locking block B741 are engaged with each other; then the spline shaft 72 is rotated, and the rotating sleeve 511 is driven to rotate by the transmission action of the locking block. The rotating sleeve 511 is fixedly connected to the cam 51, so the cam 51 will rotate accordingly; when the cam 51 rotates, it will be driven by the connecting rod 52 hinged on it. A pulling force is generated on the reciprocating rod 53. Under the pull of the connecting rod 2 52, the reciprocating rod 53 slides along the multiple limiting rods 1 532 provided on the baffle 13. The limiting rods 1 532 are slidably set in the through grooves 1 531 opened on the reciprocating rod 53, which plays a guiding role in the movement direction of the reciprocating rod 53. When the reciprocating rod 53 slides, the pull rod 54 hinged at one end is pulled. The pull rod 54 slides along the clearance groove 141, and then pulls the reset sliding assembly 55 through the connecting rod 3 541 hinged at one end. The sliding frame 551 is slidably mounted on the side plate B12. Pulled by the connecting rod 3 541, it slides down along the limiting rod 2 553 set on the side plate B12. The limiting rod 2 553 is slidably mounted in the through groove 2 552 opened on the sliding frame 551, restricting the movement direction of the sliding frame 551. Simultaneously, the sliding frame 551 is stretched by the spring 2 555 set between it and the main body 1 of the ring main unit. When the sliding frame 551 descends, the horizontal... The rod 554 will slide in the inclined groove 62 opened on the limiting block 6. Due to the inclined angle of the inclined groove 62, the sliding of the crossbar 554 will force the limiting block 6 to retract into the side plate B12, so that the protrusion 61 no longer restricts the male buckle 111 in the female buckle 121. At this time, the two ring main bodies 1 can be separated from each other. After the separation operation is completed, the spline shaft 72 is released. Under the elastic force of the spring 555, the sliding frame 551 will slide upward to reset, thereby driving the limiting block 6 to reset.

[0046] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A vacuum circuit breaker ring main unit, comprising a ring main unit body (1) and a shielding panel (2) movably arranged on the ring main unit body (1), and side plates A (11) and B (12) are arranged on both sides of the ring main unit body (1) respectively, characterized in that: The ring net cabinet body (1) is provided with a mounting plate (14), the outer side of the mounting plate (14) is provided with a baffle (13), the side plate A (11) and the side plate B (12) are both slidably provided with a vertical plate (3); Also includes: Synchronous lowering mechanism (4), the synchronous lowering mechanism (4) is arranged on the mounting plate (14), for driving the vertical plate (3) to descend; Limiting block (6), the limiting block (6) is provided with a plurality of, respectively, slidingly arranged on the side plate A (11) and the side plate B (12); Pulling mechanism (5), the pulling mechanism (5) is arranged on the mounting plate (14), for driving the limiting block (6) to shrink; Adjusting mechanism (7), the adjusting mechanism (7) is arranged on the baffle (13), the pulling mechanism (5) and the synchronous lowering mechanism (4) are adjusted by the adjusting mechanism (7); The synchronous lowering mechanism (4) includes a connecting frame (41), the connecting frame (41) is fixedly provided with a fixed plate (411) at both ends, the fixed plate (411) is fixedly connected with the vertical plate (3), and a spring (412) is arranged between the fixed plate (411) and the ring net cabinet body (1). A track (422) is fixedly arranged on the mounting plate (14), a resisting strip (42) is slidably arranged on the track (422), adjacent resisting strips (42) abut each other, a rack (421) is fixedly arranged on the resisting strip (42), a connecting rod (43) is arranged between the resisting strip (42) and the connecting frame (41), and the connecting rod (43) is hingedly connected with the connecting frame (41) and the resisting strip (42) at both ends. A horizontal shaft (44) is rotatably arranged on the mounting plate (14), a gear (441) is fixedly arranged on the horizontal shaft (44), and the gear (441) is engaged with the rack (421). The pulling mechanism (5) includes a cam (51), the cam (51) is fixedly provided with a rotating sleeve (511), the cam (51) is hingedly connected with a connecting rod (52), a reciprocating rod (53) hingedly connected with the connecting rod (52) is slidably arranged on the baffle (13), a through groove (531) is formed in the reciprocating rod (53), a plurality of limiting rods (532) are arranged on the baffle (13), the limiting rods (532) are slidably arranged in the through groove (531), one end of the reciprocating rod (53) is hingedly connected with a pull rod (54), an avoiding groove (141) is formed in the mounting plate (14), the pull rod (54) is slidably arranged on the mounting plate (14) through the avoiding groove (141), one end of the pull rod (54) is hingedly connected with a connecting rod (541), and the pull rod (54) is connected with a reset sliding assembly (55) through the connecting rod (541). The reset sliding assembly (55) comprises a sliding frame (551) which is slidingly arranged on the side plate B (12), a through groove II (552) is formed in the sliding frame (551), a limiting rod II (553) is fixedly arranged on the side plate B (12), the limiting rod II (553) is slidingly arranged in the through groove II (552), a cross rod (554) is fixedly arranged on the sliding frame (551), and a spring II (555) is arranged between the sliding frame (551) and the ring main unit body (1). The adjusting mechanism (7) comprises a spline sleeve (71), the spline sleeve (71) is rotatably arranged on the baffle (13), the rotating sleeve (511) is rotatably arranged on the spline sleeve (71), a spline shaft (72) is slidingly arranged in the spline sleeve (71), an embedded ring (73) is fixedly arranged on the spline shaft (72), a plurality of clamping blocks A (731) are arranged on the outer surface of the embedded ring (73), a sleeve cup (74) is fixedly arranged on the cross shaft (44) and the rotating sleeve (511), a plurality of clamping blocks B (741) are arranged on the inner surface of the sleeve cup (74), the sleeve cup (74) is located on the two sides of the embedded ring (73), the sleeve cup (74) is movably connected with the embedded ring (73), and the spline sleeve (71) is provided with a ratchet mechanism (8).

2. The vacuum circuit breaker ring net cabinet according to claim 1, characterized in that: The limiting block (6) is provided with a protruding block (61), the limiting block (6) is slidingly arranged on the side plate B (12) through the protruding block (61), one side of the protruding block (61) is provided with a round corner, a bevel groove (62) is formed in the limiting block (6), and the cross rod (554) is slidingly arranged in the bevel groove (62).

3. The vacuum circuit breaker ring net cabinet according to claim 2, characterized in that: The ratchet mechanism (8) comprises a ratchet wheel (81), the ratchet wheel (81) is fixedly arranged on the spline sleeve (71), a pawl (82) is rotatably arranged on the baffle (13), a spring III (83) is arranged between the pawl (82) and the baffle (13), and the pawl (82) is movably connected with the ratchet wheel (81).

4. The vacuum circuit breaker ring net cabinet according to claim 1, characterized in that: The side plate A (11) is fixedly provided with a male buckle (111), the side plate B (12) is fixedly provided with a female buckle (121), one end of the female buckle (121) is provided with an opening, the male buckle (111) is in structural correspondence with the female buckle (121), and the limiting block (6) is located at the opening end of the female buckle (121).

5. The vacuum circuit breaker ring net work cabinet according to claim 1, characterized in that: A plurality of limiting hooks (31) are arranged on the vertical plate (3), and a through sliding groove (32) is formed in the side plate A (11) and the side plate B (12).

6. The vacuum circuit breaker ring net work cabinet according to claim 5, characterized in that: A limiting groove (21) is formed in the shielding panel (2), and the limiting hook (31) is embedded in the limiting groove (21).

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