A door lock linkage mechanism for an inflatable gas chamber, the inflatable gas chamber, and its working method.

Abstract

This application discloses a door lock linkage mechanism for a gas-insulated switchgear, the gas-insulated switchgear, and its working method, relating to the field of electrical equipment. The door lock linkage mechanism includes a lock plate assembly, a rotating shaft assembly, a first linkage assembly, a second linkage assembly, and a third linkage assembly. The door lock linkage mechanism of this application achieves linkage control through a purely mechanical transmission structure. It utilizes the mechanical displacement of the front and rear cabinet doors when they are closed, the mechanical displacement when the three-position switch is grounded, and the displacement when the circuit breaker is closed or opened to drive the corresponding linkage components to operate, achieving double interlocking. There is no electrical involvement throughout the process, and the structure is reliable and the response is rapid. The gas-insulated switchgear of this application includes a cabinet body, a front cabinet door, a rear cabinet door, a three-position switch, a circuit breaker, and a door lock linkage mechanism. The working method of the door lock linkage mechanism of this application allows the front and rear cabinet doors to be unlocked only when the three-position switch is grounded and the circuit breaker is closed, and the restriction on the circuit breaker to open is only released when the front and rear cabinet doors are closed simultaneously.

Description

Technical Field

[0001] This application relates to the field of electrical equipment, and more particularly to a door lock linkage mechanism for an inflatable cabinet, an inflatable cabinet, and a method for its operation. Background Technology

[0002] According to the core safety requirements of the five-prevention system for power equipment, the operation of gas-insulated switchgear (equipped with a three-position switch and circuit breaker, etc.) must meet two key logics: First, when operating the circuit breaker to open, it must be ensured that the front and rear cabinet doors are closed simultaneously to prevent arc discharge leakage during the opening process and personnel from accidentally contacting live parts, which could cause safety accidents; Second, when the equipment is not effectively grounded, it is forbidden to open the front and rear cabinet doors to avoid personnel accidentally entering the cabinet while the equipment is energized, which could cause electric shock or equipment damage. These two logics are the core prerequisites for ensuring the safe operation of gas-insulated switchgear and are also the key points of interlocking control that urgently need to be addressed in the industry.

[0003] The three-position switch has three states: closed, isolated, and grounded. The circuit breaker has two states: open and closed. The effective grounding state of the cabinet is: first, the three-position switch is grounded, then the circuit breaker is closed. Only then can the cabinet door be opened. The grounding release operation is: first, close the front and rear cabinet doors, then open the circuit breaker, and finally ground the three-position switch.

[0004] In existing technologies, such as the interlocking devices for 40.5kV gas-insulated switchgear, most are designed for a single function and cannot simultaneously meet the above-mentioned dual interlocking requirements, resulting in numerous technical defects, as follows: 1. The interlocking function is limited and cannot achieve dual control: Existing interlocking devices either only control the linkage between the door and the circuit breaker (e.g., the circuit breaker is prohibited from closing if the door is not closed) or only control the linkage between the ground and the door (e.g., the door is prohibited from opening if the ground is not closed). There is no integrated interlocking structure designed to simultaneously satisfy the requirement that the circuit breaker can only be tripped when the front and rear cabinet doors are closed and that the door is prohibited from opening if the ground is not closed. This cannot cover the core safety requirements and has serious safety vulnerabilities. 2. Reliance on electrical interlocks is insufficient: Most existing gas-insulated switchgear uses electrical interlocks to link the door with the circuit breaker and grounding mechanism. It requires power supply to function. At the same time, electrical interlocks are greatly affected by environmental interference and are prone to malfunctions after long-term use, which cannot meet the stringent requirements for long-term stable operation of high-voltage equipment. 3. Unreasonable mechanical interlock design and poor adaptability: Although some gas cabinets are equipped with mechanical interlocks, they are mostly designed for a single cabinet door (front door or rear door) and do not take into account the interlocking requirements for closing the front and rear doors at the same time. In addition, the linkage structure is complex and the trigger sensitivity is low, which can easily lead to problems such as jamming and unsmooth unlocking. Summary of the Invention

[0005] This application provides a door lock linkage mechanism for an inflatable switchgear, an inflatable switchgear, and a working method, which can realize the linkage between the switchgear door and a three-position switch and a circuit breaker.

[0006] In one aspect, this application provides a door lock linkage mechanism for a gas-insulated cabinet, including a lock plate assembly, a rotating shaft assembly, a first linkage assembly, a second linkage assembly, and a third linkage assembly. The lock plate assembly includes lock plates correspondingly disposed on the front and rear doors, each lock plate having a slot. The rotating shaft assembly includes a first rotating shaft and a second rotating shaft rotatably disposed thereon. Both ends of the first rotating shaft have first locking plates, and both ends of the second rotating shaft have second locking plates. The first or second locking plates engage with the slots to restrict the opening and closing movement of the front or rear doors. The first linkage assembly is connected to a three-position switch of the gas-insulated cabinet and the first rotating shaft. When the three-position switch is switched to the grounding state, the first linkage assembly causes the first locking plates on the first rotating shaft to disengage from the slots. The second linkage assembly... The first linkage component connects to the circuit breaker and the second rotating shaft of the gas-insulated switchgear. When the circuit breaker switches to the closed state, the second linkage component drives the second card plate on the second rotating shaft to exit from the card slot. The third linkage component includes a first push shaft, a second push shaft, a transmission unit, and a limiting component. The first push shaft and the second push shaft are both slidably arranged along the axial direction of the first rotating shaft. One end of the first push shaft is corresponding to the front cabinet door, and the other end of the first push shaft is connected to the first end of the transmission unit. One end of the second push shaft is corresponding to the rear cabinet door, and the other end of the second push shaft is connected to the second end of the transmission unit. The transmission unit is used to convert the linear motion of the first push shaft and the second push shaft into rotational motion. The limiting component is connected to the third end of the transmission unit and is set inside the circuit breaker to limit and release the circuit breaker from opening.

[0007] Preferably, the locking plate is provided with a first slot that engages with the first card plate and a second slot that engages with the second card plate. When the first rotating shaft rotates, the first card plate engages into the first slot or exits from the first slot. When the second rotating shaft rotates, the second card plate engages into the second slot or exits from the second slot.

[0008] Preferably, the first linkage component includes a first support plate, a swing fork, a first crank arm, a first drive shaft, a second drive shaft, and a first connecting plate; the first support plate is disposed on one radial side of the first rotating shaft, the middle part of the swing fork is hinged to the first support plate, the actuating end of the swing fork is connected to a three-position switch, the follower end of the swing fork is movably connected to the first end of the first crank arm, the corner end of the first crank arm is hinged to the first support plate, the second end of the first crank arm is movably connected to one end of the first drive shaft, the first drive shaft is slidably connected to the first support plate along the radial direction of the first rotating shaft, the other end of the first drive shaft is connected to the second drive shaft, the other end of the second drive shaft is movably connected to one end of the first connecting plate, and the other end of the first connecting plate is connected to the first rotating shaft.

[0009] Preferably, the second linkage assembly includes a second connecting plate, a third connecting plate, a third drive shaft, and a fourth connecting plate. One end of the second connecting plate is provided with a hexagonal hole for connecting to the main shaft of the circuit breaker. The other end of the second connecting plate is hinged to one end of the third connecting plate. The other end of the third connecting plate is hinged to one end of the third drive shaft. The other end of the third drive shaft is movably connected to one end of the fourth connecting plate. The other end of the fourth connecting plate is connected to the second rotating shaft.

[0010] Preferably, a spring is coaxially sleeved on both the first push shaft and the second push shaft, and the spring is used for the first push shaft or the second push shaft to perform a reset movement along its axial direction.

[0011] Preferably, the transmission unit includes a second support plate, a lifting plate, a connecting pin, a fourth transmission shaft, a fifth connecting plate, a third rotating shaft, and two second crank arms. The second support plate is provided with a first guide groove radially along the first rotating shaft, and the lifting plate is provided with a second guide groove in the middle. The connecting pin is respectively disposed in the first guide groove and the second guide groove. One end of the lifting plate is connected to the first push shaft through a second crank arm, and the other end of the lifting plate is connected to the second push shaft through another second crank arm. The first end of the second crank arm is hinged to the lifting plate, and the corner end of the second crank arm is hinged to an external structure. The second end of the second crank arm is movably connected to the first push shaft or the second push shaft. One end of the fourth transmission shaft is hinged to the connecting pin, and the other end is movably connected to one end of the fifth connecting plate. The other end of the fifth connecting plate is connected to the third rotating shaft, and a limiting member is disposed on the third rotating shaft.

[0012] Preferably, the length of the first guide groove is 45mm and the length of the second guide groove is 35mm.

[0013] Preferably, the connection point between the second crank arm and the lifting plate is defined as A, the connection point between the second crank arm and the first or second push shaft is defined as B, the center point of the corner end of the second crank arm is defined as C, and the line segment... line segment .

[0014] Secondly, this application provides a gas-filled cabinet, including a cabinet body, a front door, a rear door, a three-position switch, a circuit breaker, and a door lock linkage mechanism; both the front door and the rear door are rotatably mounted on the cabinet body, the three-position switch and the circuit breaker are both mounted inside the cabinet body, and the door lock linkage mechanism is mounted inside the cabinet body.

[0015] Thirdly, this application provides a method for operating a door lock linkage mechanism. The method includes: 1. Unlock the cabinet door Three-position switch grounding: During the process of the three-position switch switching to the grounding state, the second drive column drives the swing fork to swing, the swing fork drives the first transmission shaft to move through the first crank arm, the second transmission shaft drives one end of the first connecting plate to move, so that the other end of the first connecting plate drives the first rotating shaft to rotate, and the first card plate set on the first rotating shaft exits from the first card slot of the lock plate, releasing the restriction on the lock plate; Circuit breaker closing: When the circuit breaker is closed, the main shaft of the circuit breaker rotates at a certain angle, which drives the second connecting plate to move. The second connecting plate drives the third connecting plate and the third transmission shaft to move, so that the fourth connecting plate drives the second rotating shaft to rotate. The second locking plate set on the second rotating shaft exits from the second locking slot, releasing the restriction on the locking plate. II. Remove the restriction on circuit breaker tripping. Closing the front cabinet door: When the front cabinet door is closed, the first push shaft is pushed toward the second push shaft, causing the first end of the second crank arm to drive one end of the lifting plate to rotate around the connecting pin and lift upward. During the process of the connecting pin and the lifting plate being lifted upward, the connecting pin drives the fourth transmission shaft to move upward. The fourth transmission shaft lifts one end of the fifth connecting plate, causing the third rotating shaft to rotate by a first angle. The limiting piece set on the third rotating shaft also rotates by a first angle. When the rear cabinet door is closed, the second push shaft is pushed toward the first push shaft. During the movement of the second push shaft, the second crank arm rotates around its corner end. The first end of the second crank arm drives the other end of the lifting plate to rotate around the connecting pin and lift it upward. During the process of the connecting pin and the lifting plate being lifted upward, the connecting pin drives the fourth transmission shaft to continue to move upward. The fourth transmission shaft lifts one end of the fifth connecting plate upward, so that the third rotating shaft continues to rotate a second angle after rotating a first angle. The limiting piece set on the third rotating shaft also rotates a second angle. After rotating to the second angle, the limiter is in the second position. When the limiter rotates to the second position, the limiter releases the restriction on the circuit breaker to open.

[0016] The door lock linkage mechanism, gas-filled cabinet, and working method of this application have at least the following beneficial effects: (1) The door lock linkage mechanism of this application realizes linkage control through a pure mechanical transmission structure. It uses the mechanical displacement of the front and rear cabinet doors when they are closed, the mechanical displacement when the three-position grounding is achieved, and the displacement when the circuit breaker is closed and opened to drive the corresponding linkage components to achieve double interlocking. There is no electrical involvement throughout the process, and the structure is reliable and the response is rapid.

[0017] (2) Synchronous interlocking and unlocking of front and rear cabinet doors: The third linkage component is triggered only when the front and rear cabinet doors are completely closed at the same time. When the front cabinet door is closed, the limiter rotates at the first angle. At this time, the limiter can still restrict the circuit breaker from opening. When the rear cabinet door is also closed, the limiter continues to rotate at the second angle. At this time, the limiter rotates to the side that no longer blocks the circuit breaker from opening, so that the operator can operate the circuit breaker to open normally. If any door is not closed or not completely closed, the circuit breaker's opening action will always be locked and the opening operation cannot be performed.

[0018] (3) Grounding state interlocking locks the front and rear cabinet doors: A grounding state linkage component is set up to be linked with the three-position switch and circuit breaker of the gas cabinet. Only when the gas cabinet is in an effective grounding state will the opening authority of the front and rear cabinet doors be unlocked. If the mechanism is not grounded or not effectively grounded, the front and rear cabinet doors will be interlocked and locked and cannot be opened, thus eliminating the safety hazard of opening the door for maintenance in an ungrounded state.

[0019] (4) Pure mechanical structure design: The entire process adopts mechanical transmission and mechanical locking, without the need for electrical components or power supply. It is not affected by power outages, line faults, or environmental interference. The interlocking reliability is high and the service life is long, which meets the needs of long-term stable operation of high-voltage equipment and solves the problem of insufficient reliability of existing electrical interlocking.

[0020] (5) Integrated linkage and compact structure: The front and rear cabinet door detection, grounding detection, circuit breaker locking and door locking are integrated into one unit. The number of parts is small and the structure is compact. It can be directly installed inside the gas cabinet without occupying too much space and is suitable for different specifications and layouts.

[0021] (6) Strong adaptability and convenient modification: The device adopts an adjustable structure design, which can flexibly adjust the installation position and size according to the distance between the front and rear cabinet doors and the position of the grounding mechanism of different models of gas-filled cabinets. There is no need to make major modifications to the original front and rear cabinet doors, circuit breakers and grounding mechanisms. It can be used for the production of new cabinets as well as for the upgrading and transformation of existing old cabinets, and the application is easy to promote. Attached Figure Description

[0022] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a structural schematic diagram of the door lock linkage mechanism in Embodiment 1, showing a partially enlarged view; Figure 2 This is a structural schematic diagram of the first linkage component, the first rotating shaft, and the locking plate component in Embodiment 1, with a partial enlarged view shown. Figure 3This is a partial structural schematic diagram of the door lock linkage mechanism in Embodiment 1; Figure 4 This is a partial structural schematic diagram of the third linkage component in Embodiment 1; Figure 5 yes Figure 4 The front view shows a magnified partial view; Figure 6 This is a schematic diagram of the structure of the limiting component installed inside the circuit breaker in Embodiment 1, showing a partially enlarged view; Figure 7 This is a structural schematic diagram of the limiting component and operating mechanism in Embodiment 1, showing a partially enlarged view; Figure 8 This is an isometric view of the gas-filled cabinet in Embodiment 2; Figure 9 This is an isometric view of the door lock linkage assembly, three-position switch, and circuit breaker in Embodiment 2; The annotations in the attached figures are explained as follows: 1. Locking plate assembly; 11. Locking plate; 12. Slot; 12a. First slot; 12b. Second slot; 2. Rotary shaft assembly; 21. First rotating shaft; 22. Second rotating shaft; 23. First clamping plate; 24. Second clamping plate; 3. First linkage assembly; 31. First support plate; 32. Swing fork; 33. First crank arm; 34. First drive shaft; 35. Second drive shaft; 36. First connecting plate; 37. First pin; 38. Second pin; 39. Third pin; 310. Fourth pin; 4. Second linkage assembly; 41. Second connecting plate; 42. Third connecting plate; 43. Third drive shaft; 44. Fourth connecting plate; 5. Third linkage assembly; 51. First push shaft; 52. Second push shaft; 53. Transmission unit; 531. Second support plate; 532. Lifting plate; 533. Connecting pin; 534. Fourth transmission shaft; 535. Fifth connecting plate; 536. Third rotating shaft; 537. Second crank arm; 538. Eighth pin; 539. Ninth pin; 5310. Tenth pin; 5311. Eleventh pin; 54. Limiting component; 55. Spring; 6. Cabinet; 7. Front cabinet door; 8. Rear cabinet door; 9. Three-position switch; 901. Second drive column; 10. Circuit breaker; 101. Main shaft; 102. Operating mechanism; 103. Tripping electromagnet; 104. Tripping push plate; 105. Tripping baffle; 106. Support shaft. Detailed Implementation

[0023] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0025] Example 1: like Figure 1 As shown, this embodiment discloses a door lock linkage mechanism for a gas-insulated switchgear. The gas-insulated switchgear includes a cabinet body 6, a front door 7, a rear door 8, a three-position switch 9, and a circuit breaker 10. The door lock linkage mechanism is used to ensure that the front and rear doors can be unlocked only when the three-position switch 9 is in a grounded state and the circuit breaker 10 is in a closed state, and to ensure that the restriction on the circuit breaker 10 to be opened can only be lifted when the front and rear doors are closed simultaneously.

[0026] like Figure 1 As shown, the door lock linkage mechanism includes a lock plate assembly 1, a rotating shaft assembly 2, a first linkage assembly 3, a second linkage assembly 4, and a third linkage assembly 5.

[0027] like Figure 1 As shown, the locking plate assembly 1 includes two locking plates 11. The front cabinet door 7 is provided with one locking plate 11, and the rear cabinet door 8 is provided with another locking plate 11. Each locking plate 11 is provided with two slots 12. The two slots 12 are spaced apart along the axial direction of the first rotating shaft 21. The two slots 12 are defined as the first slot 12a and the second slot 12b, respectively. The opening of the first slot 12a is downward and the opening of the second slot 12b is upward.

[0028] like Figure 1As shown, the rotating shaft assembly 2 includes a first rotating shaft 21, a second rotating shaft 22, a first locking plate 23, and a second locking plate 24. The two rotating shafts (i.e., the first rotating shaft 21 and the second rotating shaft 22) are arranged parallel to each other vertically and are rotatably installed inside the cabinet 6. Both rotating shafts can rotate around their axial direction. The first rotating shaft 21 is fixedly connected to the first locking plate 23 at both ends of the axial direction. The first locking plate 23 is set in a one-to-one correspondence with the first locking slot 12a. When the first locking plate 23 rotates and is locked into the first locking slot 12a, the front and rear cabinet doors cannot be opened. Conversely, when the first locking plate 23 is disengaged from the first locking slot 12a, the first locking plate 23 releases the restriction on the cabinet doors. The second rotating shaft 22 has a second locking plate 24 at both ends of its axial direction. The second locking plate 24 is set in a one-to-one correspondence with the second locking groove 12b. When the second locking plate 24 is rotated into the second locking groove 12b, the front and rear cabinet doors cannot be opened. Conversely, when the second locking plate 24 is disengaged from the second locking groove 12b, the second locking plate 24 releases the restriction on the cabinet door. It should be noted that the cabinet door (including the front cabinet door 7 and the rear cabinet door 8) can only be opened and closed freely when both the first locking plate 23 and the second locking plate 24 release the restriction on the locking plate 11.

[0029] like Figure 2 As shown, the first linkage assembly 3 includes a first support plate 31, a swing fork 32, a first crank arm 33, a first drive shaft 34, a second drive shaft 35, and a first connecting plate 36. The first support plate 31 is located directly above the first rotating shaft 21 and the second rotating shaft 22, with its vertical direction being the radial direction of the first rotating shaft 21. The first support plate 31 has a swing groove. The middle part of the swing fork 32 is hinged to the swing groove via a first pin 37. One end of the swing fork 32 facing the three-position switch 9 is configured as a figure-eight shaped actuating end, and the other end of the swing fork 32 along its length is configured as a follower end. The actuating end and the follower end can rotate around the first pin 37. The first crank arm 33 is L-shaped and has a first end, a corner end, and a second end. The corner end is located near the inner corner of the first crank arm 33. The first crank arm 33 has a square hole at its first end, through which the follower end of the swing fork 32 passes. The corner end of the first crank arm 33 is hinged to one side of the first support plate 31 via the second pin 38. The second end of the first crank arm 33 has a first connecting waist hole. The upper end of the first drive shaft 34 is connected to the first connecting waist hole via the third pin 39. The first drive shaft 34 is slidably mounted on the first support plate 31 via the guide hole. The first drive shaft 34 can only slide in the height direction, i.e., radially. The lower end of the first drive shaft 34 is fixedly connected to the upper end of the second drive shaft 35. One end of the first connecting plate 36 has a second connecting waist hole. The lower end of the second drive shaft 35 is connected to the second connecting waist hole via the fourth pin 310. The other end of the first connecting plate 36 is fixedly connected to the first rotating shaft 21.

[0030] like Figure 2As shown, the working principle of the first linkage component 3 is as follows: during the process of the three-position switch 9 switching to the ground state, the three-position switch 9 drives the swing fork 32 to swing, which in turn indirectly drives the first connecting plate 36 to swing downward, so that the first rotating shaft 21 rotates and drives the first card plate 23 on the first rotating shaft 21 to exit from the first card slot 12a.

[0031] like Figure 2 As shown, in this embodiment, the three-position switch 9 can drive the swing fork 32 to swing during the process of switching to the ground state. Specifically, the three-position switch 9 refers to the three-position mechanism of the prior art with patent number CN118888359A. In the prior art, the second drive column 901 cooperates with the swing fork 32. During the process of the prior art three-position mechanism switching to the ground state, it drives the second drive column 901 to move along its axial direction. During the movement, the second drive column 901 moves the swing fork 32 to swing around the first pin 37. Furthermore, the movement direction of the second drive column 901 is parallel to the axial direction of the first rotating shaft 21.

[0032] like Figure 3 As shown, the second linkage assembly 4 includes a second connecting plate 41, a third connecting plate 42, a third drive shaft 43, and a fourth connecting plate 44. One end of the second connecting plate 41 is provided with a hexagonal hole, and the main shaft 101 of the circuit breaker 10 is coaxially inserted into the hexagonal hole so that the second connecting plate 41 can follow the main shaft 101 of the circuit breaker 10. The other end of the second connecting plate 41 is hinged to the upper end of the third connecting plate 42 through a fifth pin, and the lower end of the third connecting plate 42 is hinged to the third drive shaft 43 through a sixth pin. The third drive shaft 43 is slidably disposed inside the cabinet 6 and can only slide in the height direction. One end of the fourth connecting plate 44 is provided with a third connecting waist hole, and the lower end of the third drive shaft 43 is connected to the third connecting waist hole through a seventh pin. The other end of the fourth connecting plate 44 is fixedly connected to the second rotating shaft 22.

[0033] like Figure 3 As shown, the working principle of the second linkage component 4 is as follows: During the process of switching the circuit breaker 10 to the closing state, the main shaft 101 of the circuit breaker 10 rotates, which in turn drives the third connecting plate 42 and the third transmission shaft 43 to lift through the second connecting plate 41. The third transmission shaft 43 drives the fourth connecting plate 44 to lift upward, and the fourth connecting plate 44 drives the second rotating shaft 22 to rotate. The second card plate 24 set on the second rotating shaft 22 exits from the second card slot 12b.

[0034] In this embodiment, the circuit breaker 10 can drive the second connecting plate 41 to move during the switching to the closed state. Specifically, the circuit breaker 10 refers to the circuit breaker with patent number CN222838775U in the prior art. The circuit breaker 10 is provided with an operating mechanism 102. The operating mechanism 102 can control the rotation of the main shaft 101 of the circuit breaker 10 by operating the closing button or the opening button, thereby switching the closed and opening states.

[0035] like Figure 4 As shown, the third linkage component 5 includes a first push shaft 51, a second push shaft 52, a transmission unit 53, and a limiting member 54. The first push shaft 51 and the second push shaft 52 are coaxially arranged and slidably disposed inside the cabinet 6. The first push shaft 51 and the second push shaft 52 are located above the second rotating shaft 22, and the axial direction of the two push shafts (including the first push shaft 51 and the second push shaft 52) ​​is parallel to the axial direction of the first rotating shaft 21 or the second rotating shaft 22. One end of the first push shaft 51 is connected to the first end of the transmission unit 53, and the other end of the first push shaft 51 is correspondingly disposed to the front cabinet door 7, specifically corresponding to the axial direction of the front cabinet door 7 on the first rotating shaft 21. When the front cabinet door 7 rotates towards the closed state, the front cabinet door 7 can push the first push shaft 51 towards the second push shaft 52. Similarly, one end of the second push shaft 52 is connected to the second end of the transmission unit 53, and the other end of the second push shaft 52 is correspondingly disposed to the rear cabinet door 8, specifically corresponding to the axial direction of the rear cabinet door 8 on the first rotating shaft 21. The axial arrangement is such that when the rear cabinet door 8 rotates towards the closed state, the rear cabinet door 8 can push the second push shaft 52 towards the first push shaft 51. The transmission unit 53 is located between the two push shafts. When the two push shafts approach each other, the transmission unit 53 converts the linear motion of the two push shafts into circular rotation, thereby driving the limit member 54 to rotate. When the limit member 54 rotates to the first position, the limit member 54 can cooperate with the operating mechanism 102 inside the circuit breaker 10 to restrict the operating mechanism 102 from driving the main shaft 101 of the circuit breaker 10 to rotate, thereby controlling the circuit breaker 10 from tripping. When the limit member 54 rotates to the second position, the second position is configured as a clearance position. At this time, the operating mechanism 102 can indirectly drive the main shaft 101 of the circuit breaker 10 to rotate without restriction, thereby achieving tripping. Furthermore, only when the two push shafts approach each other to a certain extent will the limit member 54 rotate from the first position to the second position, unlocking the tripping restriction on the circuit breaker 10.

[0036] like Figure 4As shown, preferably, at least one spring 55 is coaxially sleeved on the outer circumference of both the first push shaft 51 and the second push shaft 52. One end of the spring 55 abuts against the push shaft through a top pin or other component set on the push shaft. The extension and contraction direction of the spring 55 is consistent with the axial direction of the push shaft. The function of the spring 55 is to provide a restoring force for the push shaft. Specifically, when the front cabinet door 7 is rotated and closed, it drives the first push shaft 51 to move toward the second push shaft 52. During this process, the spring 55 set on the first push shaft 51 is gradually compressed and stores energy. Similarly, when the rear cabinet door 8 is rotated and closed, it drives the second push shaft 52 to move toward the first push shaft 51. During this process, the spring 55 set on the second push shaft 52 is gradually compressed and stores energy.

[0037] like Figure 5As shown, the transmission unit 53 converts the linear motion of the two push shafts along the direction of the first rotating shaft 21 into rotational motion that drives the limiting member 54 to rotate. The transmission unit 53 includes a second support plate 531, a lifting plate 532, a connecting pin 533, a fourth transmission shaft 534, a fifth connecting plate 535, a third rotating shaft 536, and two second crank arms 537. The second support plate 531 is disposed between the two push shafts. A first guide groove is provided in the middle of the second support plate 531, extending along the height direction. A second guide groove is provided in the middle of the lifting plate 532. The length direction of the second guide groove intersects the length direction of the first guide groove in the projection plane. The connecting pin 533 passes through the first and second guide grooves. The outer diameter of the connecting pin 533 is slightly smaller than the first and second guide grooves, for example, by a factor of 0.95 to 0.9. Nine times, when one end of the lifting plate 532 is lifted upward, the lifting plate 532 can rotate around the connecting pin 533, and at the same time the connecting pin 533 and the lifting plate 532 will move upward by a certain stroke. In this embodiment, a total of two second crank arms 537 are provided. The shape of the second crank arms 537 is the same as that of the first crank arm 33. The two second crank arms 537 are connected one-to-one to the two ends of the lifting plate 532 in the length direction. The lifting plate 532 is connected to the first push shaft 51 and the second push shaft 52 respectively through the second crank arms 537. Preferably, one end of the lifting plate 532 is provided with a fourth connecting waist hole along its length direction, and the other end is provided with a hinge hole. The second crank arms 537 respectively have a first end and a corner. The second crank arm 537, located between the lifting plate 532 and the second push shaft 52, has its first end connected to the fourth connecting waist hole of the lifting plate 532 via the eighth pin 538. The second crank arm 537, located between the lifting plate 532 and the first push shaft 51, has its first end hinged to the hinge hole on the lifting plate 532 via the ninth pin 539. The second end of the second crank arm 537 has a fifth connecting waist hole. The ends of both the first push shaft 51 and the second push shaft 52 are connected to the fifth connecting waist hole via the tenth pin 5310. The corner end of the second crank arm 537 is hinged to the inner side of the cabinet 6 via the eleventh pin 5311. When the first push shaft 51 or the second push shaft 52... When the two push shafts 52 approach each other, the second end of the second crank arm 537 drives the lifting plate 532 to move upward. The lower end of the fourth drive shaft 534 is hinged to the connecting pin 533. One end of the fifth connecting plate 535 is provided with a sixth connecting waist hole. The upper end of the fourth drive shaft 534 is connected to the sixth connecting waist hole through the twelfth pin. The other end of the fifth connecting plate 535 is fixedly sleeved together with the third rotating shaft 536. The third rotating shaft 536 is rotatably set inside the cabinet 6. The third rotating shaft 536 is set parallel to the main shaft 101 of the circuit breaker 10. The limiting member 54 used to limit the circuit breaker 10 from opening is set on the third rotating shaft 536. The rotation of the third rotating shaft 536 drives the limiting member 54 to rotate.

[0038] like Figure 5As shown, preferably, the parameters of each component of the transmission unit 53 are designed as follows: Length of the first guide groove It is 45mm, where mm represents millimeters; Length of the second guide groove It is 35mm; The connection point between the second crank arm 537 and the lifting plate 532 is defined as A, preferably the center points of both the eighth pin 538 and the ninth pin 539 are defined as A; the connection point between the second crank arm 537 and the first push shaft 51 or the second push shaft 52 is defined as B, preferably the center point of the tenth pin 5310 is defined as B; the center point of the corner end of the second crank arm 537 is defined as C; wherein, the length of line segment AC is equal to 50mm, and the length of line segment BC is within... The changes between them.

[0039] The length of the fifth connecting waist hole set on the second crank arm 537 is defined as follows: , The length of the fourth connecting hole at the end of the lifting plate 532 is defined as follows: , The distance between the eighth pin 538 and the ninth pin 539 is defined as , It varies between 82mm and 100mm.

[0040] like Figure 5 As shown, the working principle of the third linkage component 5 is as follows: When the front cabinet door 7 is closed, it pushes the first push shaft 51 toward the second push shaft 52. The second crank arm 537 connected to the first push shaft 51 drives one end of the lifting plate 532 to rise. The lifting plate 532 rotates around the connecting pin 533 and is lifted upward along the first guide groove for about half of the predetermined distance. The lifting distance of the lifting plate 532 is determined by the rotation angle of the two second crank arms 537. Therefore, when the rear cabinet door 8 is also rotated and closed, the lifting plate 532 is lifted upward for the other half of the distance. This can indirectly drive the third rotating shaft 536 and the limiting member 54 set on the third rotating shaft 536 to rotate from the first position to the second position, so that the limiting member 54 avoids the operating mechanism 102. The operating mechanism 102 can freely drive the main shaft 101 to rotate and open the circuit breaker.

[0041] like Figure 6 and Figure 7As shown, in this embodiment, the principle by which the limiting member 54 prevents the operating mechanism 102 of the circuit breaker 10 from tripping is as follows: The circuit breaker 10 in this embodiment refers to the circuit breaker with patent number CN222838775U. The circuit breaker 10 has an operating mechanism 102 inside. The operating mechanism 102 inside the circuit breaker 10 is also existing technology, such as the operating mechanism 102 in the handcart-type vacuum circuit breaker disclosed in patent number CN204497146U. Figure 7 As shown, Figure 7 The diagram illustrates the state of the limit member 54 in the second position: When the operating mechanism 102 needs to control the rotation of the main shaft 101 to open the circuit breaker, the opening electromagnet 103 needs to push the opening push plate 104. Because the opening push plate 104 is fixedly connected to the support shaft 106, the support shaft 106 will rotate synchronously when the opening electromagnet 103 pushes the opening push plate 104. The support shaft 106 and the main shaft 101 of the circuit breaker 10 are connected through other components, which can realize the synchronous rotation of the main shaft 101, thereby realizing the opening. Among them, the end of the support shaft 106 is fixed. A tripping baffle 105 is provided to cooperate with the limiting member 54. The limiting member 54 is located on one side of the tripping baffle 105. When the limiting member 54 is in the first position, the limiting member 54 is within the rotation range of the tripping baffle 105, and the tripping electromagnet 103 cannot drive the support shaft 106 and the tripping baffle 105 to rotate to the tripping position. Conversely, when the limiting member 54 is in the second position, the limiting member 54 is not within the rotation range of the tripping baffle 105, and the tripping electromagnet 103 can drive the support shaft 106 and the tripping baffle 105 to rotate to the tripping position.

[0042] Example 2: like Figure 8 and Figure 9 As shown, this embodiment two discloses an air-filled cabinet, which includes a cabinet body 6, a front door 7, a rear door 8, a three-position switch 9, a circuit breaker 10, and the door lock linkage mechanism in embodiment one.

[0043] Cabinet 6 has a first doorway and a second doorway. The front door 7 is rotatably mounted on cabinet 6 to close the first doorway, and the rear door 8 is rotatably mounted on cabinet 6 to close the second doorway.

[0044] The three-position switch 9 is installed inside the cabinet 6. The three-position switch 9 refers to the three-position mechanism with patent number CN118888359A. The circuit breaker 10 is installed inside the cabinet 6. The circuit breaker 10 is based on the circuit breaker with patent number CN222838775U. The door lock linkage mechanism is located on the inside of cabinet 6.

[0045] Example 3: This embodiment discloses a working method of a door lock linkage mechanism, using the door lock linkage mechanism of Embodiment 1 or Embodiment 2. The working method includes: 1. Unlock the cabinet door. Unlocking the cabinet door requires two conditions to be met simultaneously: first, the three-position switch 9 is grounded; second, the circuit breaker 10 is in the closed state. Three-position switch 9 grounding unlocks front cabinet door 7 and rear cabinet door 8: During the process of switching three-position switch 9 from other states to grounding state, the second drive column 901 drives the swing fork 32 to swing. The swing fork 32 drives the first drive shaft 34 to move down through the first crank arm 33. Since the second drive shaft 35 is fixedly connected to the first drive shaft 34, the second drive shaft 35 presses down on one end of the first connecting plate 36, causing the other end of the first connecting plate 36 to drive the first rotating shaft 21 to rotate. The first locking plate 23 set on the first rotating shaft 21 exits from the first locking groove 12a of the locking plate 11. The first locking plate 23 releases the restriction on the locking plate 11, thereby releasing the restriction on the front cabinet door 7 and the rear cabinet door 8. When the circuit breaker 10 is closed, the front cabinet door 7 and the rear cabinet door 8 are unlocked: When the circuit breaker 10 is closed, the main shaft 101 of the circuit breaker 10 rotates at a certain angle. When the main shaft 101 rotates, it drives the second connecting plate 41 to move. The second connecting plate 41 drives the third connecting plate 42 and the third transmission shaft 43 to move upward, so that the fourth connecting plate 44 drives the second rotating shaft 22 to rotate. The second locking plate 24 set on the second rotating shaft 22 exits from the second locking slot 12b. The second locking plate 24 releases the restriction on the locking plate 11, thereby releasing the restriction on the front cabinet door 7 and the rear cabinet door 8. The restriction on the lock plate 11 is lifted by the first card plate 23 and the second card plate 24, thereby lifting the opening and closing restrictions on the front cabinet door 7 and the rear cabinet door 8.

[0046] 2. With both front cabinet door 7 and rear cabinet door 8 closed, the restriction on circuit breaker 10 to trip is lifted. When the front cabinet door 7 is closed, the front cabinet door 7 pushes the first push shaft 51 toward the second push shaft 52. During the movement of the first push shaft 51, the second crank arm 537 rotates around its corner end, causing the first end of the second crank arm 537 to drive one end of the lifting plate 532 to rotate around the connecting pin 533 and lift upward. During the process of the connecting pin 533 and the lifting plate 532 being lifted upward, the connecting pin 533 drives the fourth transmission shaft 534 to move radially upward. The fourth transmission shaft 534 lifts one end of the fifth connecting plate 535 upward, causing the third rotating shaft 536 to rotate by a first angle. The limiting member 54 set on the third rotating shaft 536 also rotates by a first angle. When the rear cabinet door 8 is closed, the rear cabinet door 8 pushes the second push shaft 52 toward the first push shaft 51. During the movement of the second push shaft 52, the second crank arm 537 rotates around its corner end. The first end of the second crank arm 537 drives the other end of the lifting plate 532 to rotate around the connecting pin 533 and lift upward. During the process of the connecting pin 533 and the lifting plate 532 being lifted upward, the connecting pin 533 drives the fourth transmission shaft 534 to continue to move upward radially. The fourth transmission shaft 534 pushes one end of the fifth connecting plate 535 upward, so that the third rotating shaft 536 continues to rotate a second angle after rotating a first angle. The limiting member 54 set on the third rotating shaft 536 also rotates a second angle. Before rotating at the first angle, the limiting member 54 is in the first position. After rotating at the second angle, the limiting member 54 is in the second position. Therefore, when the limiting member 54 is in the first position, the operating mechanism 102 of the circuit breaker 10 cannot drive the main shaft 101 of the circuit breaker 10 to rotate to the open state. When the limiting member 54 rotates to the second position, the limiting member 54 releases the restriction on the opening of the circuit breaker 10, and the operating mechanism 102 can indirectly drive the main shaft 101 to rotate to the open state.

[0047] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A door lock linkage mechanism for an inflatable cabinet, characterized in that, include: The locking plate assembly (1) includes locking plates (11) that are correspondingly installed on the front cabinet door (7) and the rear cabinet door (8), and the locking plates (11) are provided with slots (12). The rotating shaft assembly (2) includes a first rotating shaft (21) and a second rotating shaft (22) that are rotatably configured. Both ends of the first rotating shaft (21) are provided with a first clamping plate (23), and both ends of the second rotating shaft (22) are provided with a second clamping plate (24). The first clamping plate (23) or the second clamping plate (24) is engaged in the slot (12) to restrict the opening and closing movement of the front cabinet door (7) or the rear cabinet door (8). The first linkage component (3) is connected to the three-position switch (9) of the gas filling cabinet and the first rotating shaft (21) respectively. When the three-position switch (9) is switched to the grounding state, the first linkage component (3) drives the first card plate (23) on the first rotating shaft (21) to exit from the card slot (12); The second linkage component (4) is connected to the circuit breaker (10) and the second rotating shaft (22) of the gas-filled cabinet respectively. When the circuit breaker (10) switches to the closed state, the second linkage component (4) drives the second card plate (24) on the second rotating shaft (22) to exit from the card slot (12). The third linkage component (5) includes a first push shaft (51), a second push shaft (52), a transmission unit (53), and a limiting member (54). The first push shaft (51) and the second push shaft (52) are both slidably arranged along the axial direction of the first rotating shaft (21). One end of the first push shaft (51) is correspondingly arranged with the front cabinet door (7), and the other end of the first push shaft (51) is connected to the first end of the transmission unit (53). One end of the second push shaft (52) is correspondingly arranged with the rear cabinet door (8), and the other end of the second push shaft (52) is connected to the second end of the transmission unit (53). The transmission unit (53) is used to convert the linear motion of the first push shaft (51) and the second push shaft (52) into rotational motion. The limiting member (54) is connected to the third end of the transmission unit (53). The limiting member (54) is arranged inside the circuit breaker (10) and is used to limit and release the opening of the circuit breaker (10).

2. The door lock linkage mechanism according to claim 1, characterized in that, The locking plate (11) is provided with a first slot (12a) that engages with the first locking plate (23) and a second slot (12b) that engages with the second locking plate (24). When the first rotating shaft (21) rotates, the first locking plate (23) engages into or exits from the first slot (12a). When the second rotating shaft (22) rotates, the second locking plate (24) engages into or exits from the second slot (12b).

3. The door lock linkage mechanism according to claim 1, characterized in that, The first linkage assembly (3) includes a first support plate (31), a swing fork (32), a first crank arm (33), a first drive shaft (34), a second drive shaft (35), and a first connecting plate (36). The first support plate (31) is located on one radial side of the first rotating shaft (21). The middle part of the swing fork (32) is hinged to the first support plate (31). The actuating end of the swing fork (32) is connected to the three-position switch (9). The follower end of the swing fork (32) is movably connected to the first end of the first crank arm (33). The corner end of the arm (33) is hinged to the first support plate (31). The second end of the first crank arm (33) is movably connected to one end of the first drive shaft (34). The first drive shaft (34) is slidably connected to the first support plate (31) along the radial direction of the first rotating shaft (21). The other end of the first drive shaft (34) is connected to the second drive shaft (35). The other end of the second drive shaft (35) is movably connected to one end of the first connecting plate (36). The other end of the first connecting plate (36) is connected to the first rotating shaft (21).

4. The door lock linkage mechanism according to claim 1, characterized in that, The second linkage assembly (4) includes a second connecting plate (41), a third connecting plate (42), a third transmission shaft (43), and a fourth connecting plate (44). One end of the second connecting plate (41) is provided with a hexagonal hole that connects to the main shaft (101) of the circuit breaker (10). The other end of the second connecting plate (41) is hinged to one end of the third connecting plate (42). The other end of the third connecting plate (42) is hinged to one end of the third transmission shaft (43). The other end of the third transmission shaft (43) is movably connected to one end of the fourth connecting plate (44). The other end of the fourth connecting plate (44) is connected to the second rotating shaft (22).

5. The door lock linkage mechanism according to claim 1, characterized in that, Springs (55) are coaxially sleeved on both the first push shaft (51) and the second push shaft (52). The springs (55) are used to reset the first push shaft (51) or the second push shaft (52) along its axial direction.

6. The door lock linkage mechanism according to any one of claims 1 to 5, characterized in that, The transmission unit (53) includes a second support plate (531), a lifting plate (532), a connecting pin (533), a fourth transmission shaft (534), a fifth connecting plate (535), a third rotating shaft (536), and two second crank arms (537). The second support plate (531) is provided with a first guide groove radially along the first rotating shaft (21), and the lifting plate (532) is provided with a second guide groove in the middle. The connecting pin (533) is respectively provided in the first guide groove and the second guide groove. One end of the lifting plate (532) is connected to the first push shaft (51) through a second crank arm (537). The other end is connected to the second push shaft (52) via another second crank arm (537). The first end of the second crank arm (537) is hinged to the lifting plate (532). The corner end of the second crank arm (537) is hinged to the external structure. The second end of the second crank arm (537) is movably connected to the first push shaft (51) or the second push shaft (52). One end of the fourth transmission shaft (534) is hinged to the connecting pin (533), and the other end is movably connected to one end of the fifth connecting plate (535). The other end of the fifth connecting plate (535) is connected to the third rotating shaft (536). The limiting member (54) is set on the third rotating shaft (536).

7. The door lock linkage mechanism according to claim 6, characterized in that, The length of the first guide groove is 45mm, and the length of the second guide groove is 35mm.

8. The door lock linkage mechanism according to claim 7, characterized in that, The connection point between the second crank arm (537) and the lifting plate (532) is defined as A; the connection point between the second crank arm (537) and the first push shaft (51) or the second push shaft (52) is defined as B; the center point of the corner end of the second crank arm (537) is defined as C; line segment line segment .

9. An inflatable cabinet, characterized in that, It includes a cabinet (6), a front cabinet door (7), a rear cabinet door (8), a three-position switch (9), a circuit breaker (10), and a door lock linkage mechanism according to any one of claims 1 to 8; the front cabinet door (7) and the rear cabinet door (8) are both rotatably mounted on the cabinet (6), the three-position switch (9) and the circuit breaker (10) are both mounted inside the cabinet (6), and the door lock linkage mechanism is mounted inside the cabinet (6).

10. A method for operating a door lock linkage mechanism, using the door lock linkage mechanism according to any one of claims 1 to 8, the method comprising:

1. Unlock the cabinet door Three-position switch grounding: During the process of the three-position switch switching to the grounding state, the second drive column drives the swing fork to swing, the swing fork drives the first transmission shaft to move through the first crank arm, the second transmission shaft drives one end of the first connecting plate to move, so that the other end of the first connecting plate drives the first rotating shaft to rotate, and the first card plate set on the first rotating shaft exits from the first card slot of the lock plate, releasing the restriction on the lock plate; Circuit breaker closing: When the circuit breaker is closed, the main shaft of the circuit breaker rotates at a certain angle, which drives the second connecting plate to move. The second connecting plate drives the third connecting plate and the third transmission shaft to move, so that the fourth connecting plate drives the second rotating shaft to rotate. The second locking plate set on the second rotating shaft exits from the second locking slot, releasing the restriction on the locking plate. II. Remove the restriction on circuit breaker tripping. Closing the front cabinet door: When the front cabinet door is closed, the first push shaft is pushed toward the second push shaft, causing the first end of the second crank arm to drive one end of the lifting plate to rotate around the connecting pin and lift upward. During the process of the connecting pin and the lifting plate being lifted upward, the connecting pin drives the fourth transmission shaft to move upward. The fourth transmission shaft lifts one end of the fifth connecting plate, causing the third rotating shaft to rotate by a first angle. The limiting piece set on the third rotating shaft also rotates by a first angle. When the rear cabinet door is closed, the second push shaft is pushed toward the first push shaft. During the movement of the second push shaft, the second crank arm rotates around its corner end. The first end of the second crank arm drives the other end of the lifting plate to rotate around the connecting pin and lift it upward. During the process of the connecting pin and the lifting plate being lifted upward, the connecting pin drives the fourth transmission shaft to continue to move upward. The fourth transmission shaft lifts one end of the fifth connecting plate upward, so that the third rotating shaft continues to rotate a second angle after rotating a first angle. The limiting piece set on the third rotating shaft also rotates a second angle. After rotating to the second angle, the limiter is in the second position. When the limiter rotates to the second position, the limiter releases the restriction on the circuit breaker to open.

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