Mechanical interlocking for gas insulated metal enclosed switch

Abstract

The application provides a mechanical interlock of a gas insulated metal enclosed switch, which comprises a bin door lock, an interlock sliding piece connected with the bin door lock through a door lock rod, an interlock piece installed on a lifting limiting mechanism, a lock plate connected with a circuit breaker partition through a rotating shaft, a lifting transmission mechanism installed on the circuit breaker, a first resistance piece sleeved on a main shaft of the circuit breaker, a lifting limiting mechanism connected with the interlock sliding piece and abutting against a grounding baffle of a three-position isolation mechanism at an upper end, an operation limiting plate connected with a circuit breaker operation hole baffle, a rotating plate connected with the lifting transmission mechanism through a rotating shaft, and a moving pin shaft installed on the rotating plate and inserted into a long hole of the operation limiting plate; the interlock sliding piece moves to the left to drive the lifting limiting mechanism to move downward; the lifting limiting mechanism moves upward to drive the interlock sliding piece to move to the right; the first resistance piece abuts against the lifting limiting mechanism or the lifting transmission mechanism; and the lock plate is clamped with a circuit breaker opening coil transmission shaft and is connected with the interlock piece through a first tension spring.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment technology, and in particular to a mechanical interlocking of a gas-insulated metal-enclosed switch. Background Technology

[0002] In power system operation, safe and stable power supply is the core objective. The "five-prevention" requirements, as the core safety principles for the design and operation of power equipment, aim to fundamentally prevent equipment damage, power grid failures, and personal safety accidents caused by misoperation, playing an irreplaceable role in ensuring the reliable operation of the power system. Gas-insulated metal-enclosed switches, with their small size, excellent insulation performance, and high operational reliability, are widely used in various substations and distribution projects. However, the coordinated safety of their core operating mechanisms directly depends on the interlocking design. Existing gas-insulated metal-enclosed switchgear interlocking designs suffer from insufficient adaptability and poor reliability, making it difficult to fully meet the stringent requirements of the "five-prevention" standards and posing potential risks to the safe operation of the equipment.

[0003] The core operating mechanisms of gas-insulated metal-enclosed switchgear include the circuit breaker and the three-position isolating mechanism. The safety of their coordinated operation directly determines the overall operational safety of the equipment. According to the "five-prevention" standard, clear interlocking constraints must be met: when the circuit breaker is in the closed position, the three-position isolating mechanism is strictly prohibited from performing closed isolation or closed grounding operations to prevent arcing faults caused by operation under load; when the three-position isolating mechanism is in the open or grounded position, the circuit breaker must remain open and must not be closed to avoid connecting the grounding or isolation circuit under energized conditions; the compartment door can only be opened after the three-position isolating mechanism is in the grounded position to ensure maintenance safety. However, existing interlocking structures often have problems such as delayed or inaccurate transmission of action signals, leading to the risk of misoperation. Summary of the Invention

[0004] This invention provides a mechanical interlock for a gas-insulated metal-enclosed switch, which solves the problems of delayed or inaccurate action signal transmission in existing interlocking structures, thus avoiding the risk of misoperation.

[0005] This invention provides a mechanical interlock for a gas-insulated metal-enclosed switch, comprising a door lock, a door lock rod, an interlocking sliding member, an interlocking component, a lock plate, a lifting transmission mechanism, a first abutment, a lifting limit mechanism, an operating limit plate, a rotating plate, and a moving pin. The door lock is used to lock the cable compartment door. The interlocking sliding member is connected to the door lock via the door lock rod. The lower end of the lifting limit mechanism is connected to the interlocking sliding member, and the upper end of the lifting limit mechanism abuts against the grounding baffle of the three-position isolation mechanism. When the cable compartment door is closed, the door lock is locked and the door lock rod drives the interlocking sliding member to move to the left, which in turn drives the lifting limit mechanism to move downward. During maintenance, the lifting limit mechanism moves upward, causing the interlocking sliding member to move to the right, which in turn moves the door lock rod to the right to unlock the door lock. The first abutment... It is sleeved on the main shaft of the circuit breaker; when the circuit is open, the first abutment abuts against the lifting limit mechanism to restrict the lifting limit mechanism from moving upward; when the circuit is closed, the first abutment abuts against the lower end of the lifting transmission mechanism to restrict the lifting transmission mechanism from moving downward; the interlocking component is installed on the lifting limit mechanism, the middle part of the locking plate is connected to the partition of the circuit breaker through a rotating shaft, one end of the locking plate is used to engage with the transmission shaft of the circuit breaker's opening coil, and the other end of the locking plate is connected to the interlocking component through a first tension spring; the lifting transmission mechanism is installed on the circuit breaker in a liftable manner, the rotating plate is connected to the upper end of the lifting transmission mechanism through a rotating shaft, the lower end of the operating limit plate has an elongated hole, the moving pin is installed on the upper end of the rotating plate and inserted into the elongated hole, and the upper end of the operating limit plate is fixedly connected to the circuit breaker's operating hole baffle.

[0006] In addition, the mechanical interlock of the gas-insulated metal-enclosed switch according to the present invention may also have the following additional technical features: In some embodiments of the present invention, the upper end of the lifting limit mechanism abuts against the lower side wall of the grounding baffle of the three-position isolation mechanism; the door lock includes a lock block, an interlocking hook, a hook top plate, a second tension spring top plate, and a second tension spring. The lock block is installed on the cable compartment door of the ring main unit. The interlocking hook and the door lock rod are connected by a rotating shaft. One end of the interlocking hook is provided with an inclined surface. The hook top plate is installed on the ring main unit and abuts against the inclined surface. The second tension spring top plate is installed on the door lock rod and is located between the interlocking hook and the hook top plate. The second tension spring is sleeved on the door lock rod and one end is connected to the hook top plate. The other end of the second tension spring is connected to the second tension spring top plate. The end of the interlocking hook is integrally formed with a lock hook. A first groove is formed between the lock hook and the interlocking hook. The end of the lock block is installed with a lock latch block. A second groove is formed between the lock latch block and the lock block. When the door is closed, the lock hook abuts against the lock latch block. The lock latch block is inserted into the first groove, and the lock hook is inserted into the second groove.

[0007] In some embodiments of the present invention, the lifting limit mechanism includes a three-position isolation limit member, a guide sleeve, a locking rod, and a second abutment member. The interlocking sliding member includes an interlocking side plate and an interlocking connecting plate. The upper end of the three-position isolation limit member abuts against the grounding baffle of the three-position isolation mechanism. The guide sleeve is installed on the top of the circuit breaker, and the upper end of the locking rod passes through the guide sleeve and connects to the three-position isolation limit member. The second abutment member is installed on the locking rod. When the circuit breaker is opened, the first abutment member abuts against the second abutment member. The lower end of the locking rod is provided with an elongated hole, and a pin is inserted into the side wall of the elongated hole. The interlocking side plate is inserted into the elongated hole and is located between the pin and the bottom wall of the elongated hole. The cross-sectional shape of the interlocking side plate is a right trapezoid. The surface corresponding to the inclined waist of the interlocking side plate abuts against the pin. The door lock rod is connected to the interlocking side plate through the interlocking connecting plate.

[0008] In some embodiments of the present invention, the door lock rod includes a first rod body and a second rod body. One end of the first rod body is fixedly connected to a connecting plate, and one end of the second rod body is connected to the other end of the first rod body by bolts. The other end of the second rod body is rotatably connected to an interlocking hook via a rotating shaft. The top plate of the hook and the second tension spring are both sleeved on the second rod body, and the top plate of the second tension spring is fixedly connected to the second rod body.

[0009] In some embodiments of the present invention, the lock block includes a connecting seat and a lock body. The connecting seat is installed on the door, one end of the lock body is fixedly connected to the connecting seat, and the other end of the lock body is equipped with a lock block.

[0010] In some embodiments of the present invention, the lifting limit mechanism further includes a lifting transition plate, and the three-position isolation limit component includes a bottom connecting plate, a first side plate and a second side plate. The bottom connecting plate is connected to the upper end of the locking rod through the lifting transition plate. The first side plate is fixedly connected to one side of the bottom connecting plate, and the second side plate is fixedly connected to the other side of the bottom connecting plate. The upper end of the first side plate abuts against the grounding baffle of the three-position isolation mechanism, and the second side plate is connected to the operation panel of the three-position isolation mechanism and can move up and down relative to the operation panel of the three-position isolation mechanism.

[0011] In some embodiments of the present invention, a tripping baffle and a support plate are also included. The tripping baffle is installed on the tripping coil drive shaft of the circuit breaker, and a slot is provided on the locking plate. When the circuit is closed, the tripping baffle is inserted into the slot.

[0012] In some embodiments of the present invention, the lifting transmission mechanism includes a lifting rod, a lifting baffle, and a lifting linkage plate. The lifting rod is installed in the circuit breaker in a liftable manner. The lifting linkage plate is connected to the upper end of the lifting rod through the lifting baffle. The rotating plate is connected to the lifting linkage plate through a rotating shaft.

[0013] In some embodiments of the present invention, the first abutment includes a first limiting cam and a second limiting cam, both of which are mounted on the main shaft of the circuit breaker; when the circuit is open, the first limiting cam abuts against the second abutment; when the circuit is closed, the second limiting cam abuts against the lower end of the lifting rod.

[0014] In some embodiments of the present invention, a limit switch frame and a limit switch are also included, the limit switch frame being mounted on the circuit breaker and the limit switch being mounted on the limit switch frame, the limit switch being used to limit the travel of the locking lever.

[0015] In summary, this application includes the following beneficial technical effects: This mechanical interlock, through the linkage of the door lock, door lock rod, interlock sliding component, interlock component, lock plate, lifting transmission mechanism, first stop component, lifting limit mechanism, operating limit plate, rotating plate, and moving pin, ensures that when the circuit breaker is in the closed state, the three-position isolation mechanism is strictly prohibited from performing closed isolation or closed grounding operations, preventing arcing faults caused by load operation; when the three-position isolation mechanism is in the open or grounded position, the circuit breaker must remain open and must not be closed, avoiding live connection of the grounding or isolation circuit; the door is opened only when the three-position isolation mechanism is in the grounded position to ensure maintenance safety; in addition, this mechanical interlock adopts a purely mechanical structure without electrical components, thus avoiding problems such as delayed or inaccurate action signal transmission and avoiding the risk of misoperation. Attached Figure Description

[0016] 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 invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A first perspective view schematically illustrates a mechanical interlocking of a gas-insulated metal-sealed switch according to some embodiments of the present invention.

[0017] Figure 2 The diagram schematically shows a first perspective view of a gas-insulated metal-enclosed switch according to some embodiments of the present invention, without a lifting adjustment assembly, having a mechanical interlock.

[0018] Figure 3 A second perspective view schematically illustrates a gas-insulated metal-enclosed switch according to some embodiments of the present invention, without a lifting adjustment assembly, showing a mechanical interlock.

[0019] Figure 4 The diagram schematically shows a third perspective view of a gas-insulated metal-enclosed switch according to some embodiments of the present invention, without a lifting adjustment assembly, in which the mechanical interlock is not provided.

[0020] Figure 5 A second perspective view schematically illustrates a mechanical interlocking of a gas-insulated metal-sealed switch according to some embodiments of the present invention.

[0021] Figure 6 This schematically shows a partial enlarged view of part I of a third perspective view of a gas-insulated metal-sealed switch according to some embodiments of the present invention, without a lifting adjustment assembly.

[0022] Figure 7 A partial enlarged view of part II of the third view of a perspective view of a gas-insulated metal-sealed switch according to some embodiments of the present invention, without the lifting adjustment assembly, is shown schematically.

[0023] Figure 8 A partial enlarged view of part III of a perspective view of a gas-insulated metal-enclosed switch according to some embodiments of the present invention, without a lifting adjustment assembly, is shown schematically.

[0024] Figure 9 Part IV of a third view schematically illustrates a perspective view of a gas-insulated metal-sealed switch according to some embodiments of the present invention, without a lifting adjustment assembly, showing a partially enlarged view.

[0025] Figure 10 A partially enlarged second view schematically illustrating a perspective view of the mechanical interlocking of a gas-insulated metal-sealed switch according to some embodiments of the present invention is shown.

[0026] Figure 11 A perspective view of the interlocking element of a mechanical interlocking of a gas-insulated metal-sealed switch according to some embodiments of the present invention is shown schematically.

[0027] Figure 12 A perspective view of the second stop of the mechanical interlocking of a gas-insulated metal-sealed switch according to some embodiments of the present invention is shown schematically.

[0028] Figure 13 A schematic diagram of a first plan view showing a gas-insulated metal-enclosed switch according to some embodiments of the present invention, with mechanical interlocking mounted on a switching device and concealed in a partial housing.

[0029] Figure 14 A partially enlarged view of a first planar schematic diagram illustrating a gas-insulated metal-enclosed switch according to some embodiments of the present invention, with mechanical interlocking mounted on a switching device and concealed in a partial housing.

[0030] Figure 15A schematic second plan view of a gas-insulated metal-enclosed switch according to some embodiments of the present invention is shown, wherein the mechanical interlock is mounted on a switching device and the partial housing is concealed.

[0031] Figure 16 A partial schematic diagram of a second plan view of a gas-insulated metal-enclosed switch according to some embodiments of the present invention is shown, wherein the mechanical interlocking is mounted on a switching device and the partial housing is concealed.

[0032] Figure 17 A first perspective view schematically illustrates the connection between the mechanical interlocking of a gas-insulated metal-enclosed switch and a circuit breaker and a three-position isolation mechanism according to some embodiments of the present invention.

[0033] Figure 18 A partially enlarged first view schematically illustrates the connection between the mechanical interlocking of a gas-insulated metal-enclosed switch and a circuit breaker and a three-position isolation mechanism according to some embodiments of the present invention.

[0034] Figure 19 The second perspective view schematically illustrates the connection between the mechanical interlocking of a gas-insulated metal-enclosed switch and a circuit breaker and a three-position isolation mechanism according to some embodiments of the present invention.

[0035] Figure 20 A partially enlarged second view schematically illustrates the connection between the mechanical interlocking of a gas-insulated metal-enclosed switch and a circuit breaker and a three-position isolation mechanism according to some embodiments of the present invention.

[0036] Figure 21 A perspective view of a lifting adjustment assembly for a mechanical interlock of a gas-insulated metal-sealed switch according to some embodiments of the present invention is shown schematically.

[0037] Figure 22 A first perspective view of a fixing member for mechanical interlocking of a gas-insulated metal-sealed switch according to some embodiments of the present invention is shown schematically.

[0038] Figure 23 A second perspective view schematically illustrates a fixing member of a mechanical interlocking mechanism for a gas-insulated metal-sealed switch according to some embodiments of the present invention.

[0039] Figure label: 1. Lock door lock: 11. Lock block; 111. Locking block; 112. Connecting seat; 113. Lock body; 114. Second slot; 12. Interlocking hook; 121. Inclined surface; 122. First slot; 123. Lock hook; 13. Hook top plate; 14. Second tension spring top plate; 15. Second tension spring; 2. Lock rod: 21. First rod body; 22. Second rod body; 3. Interlocking sliding component: 31. Interlocking side plate; 32. Interlocking connecting plate; 33. Interlocking top plate; 34. Interlocking slot; 4. 41. Locking components, 411. Locking plate, 411. Bayonet, 42. First tension spring, 43. Opening baffle, 44. Support plate, 45. First plate body, 46. Mounting plate body, 47. Second plate body, 48. Abutment plate; 5. Lifting transmission mechanism, 51. Lifting square rod, 52. Lifting baffle, 53. Lifting linkage plate, 54. Guide frame; 6. First abutment component, 61. First limiting cam, 611. First connecting ring, 612. First abutment rod, 62. Second limiting cam, 621. Second connecting ring 622. Connecting ring; 7. Second stop rod; 7. Lifting limit mechanism; 71. Three-position isolation limit component; 711. Bottom connecting plate; 712. First side plate; 713. Second side plate; 72. Guide sleeve; 73. Locking rod; 731. Long hole; 74. Second stop component; 741. First connecting piece; 742. Second connecting piece; 743. Baffle plate; 75. Lifting adjustment assembly; 751. Fixing component; 7511. Fixed top plate; 7512. Fixed bottom plate; 7513. Fixed side plate 7514, First arc hole; 7515, Transition strip hole; 7516, Second arc hole; 752, Lifting adjustment rod; 7521, Connecting rod; 7522, Adjusting shaft; 7523, Arc surface; 7524, Plane; 753, Lifting connecting rod; 76, Lifting transition plate; 8, Operating limit plate; 81, Rotating plate; 82, Moving pin; 83, Long strip hole; 9, Limit switch frame; 91, Limit switch; 100, Circuit breaker; 200, Three-position isolation mechanism. Detailed Implementation

[0040] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0041] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "upper," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. Furthermore, the device may be oriented or rotated 90 degrees or in other directions, and the spatial relative descriptors used in the text will be interpreted accordingly.

[0042] like Figures 1 to 23 As shown, according to an embodiment of the first aspect of the present invention, a mechanical interlock of a gas-insulated metal-sealed switch is provided, including a door lock 1, a door lock rod 2, an interlocking sliding member 3, an interlocking member 4, a lock plate 41, a lifting transmission mechanism 5, a first blocking member 6, a lifting limit mechanism 7, an operating limit plate 8, a rotating plate 81, and a moving pin 82. The cable storage lock 1 is used to lock the cable storage door. The interlocking sliding member 3 is connected to the cable storage lock 1 through the door lock rod 2. The lower end of the lifting limit mechanism 7 is connected to the interlocking sliding member 3, and the upper end of the lifting limit mechanism 7 abuts against the grounding baffle of the three-position isolation mechanism 200. When the cable storage door is closed, the cable storage lock 1 is locked and the interlocking sliding member 3 is moved to the left by the door lock rod 2. The interlocking sliding member 3 moves the lifting limit mechanism 7 downward. During maintenance, the lifting limit mechanism 7 moves upward, which moves the interlocking sliding member 3 to the right, which moves the door lock rod 2 to the right to unlock the cable storage lock 1. The first abutment 6 is sleeved on the main shaft of the circuit breaker 100; when the circuit is open, the first abutment 6 abuts against the lifting limit mechanism 7 to restrict the lifting limit mechanism 7 from moving upward; when the circuit is closed, the first abutment 6 abuts against the lower end of the lifting transmission mechanism 5 to restrict the lifting transmission mechanism 5 from moving downward. The interlocking component 4 is installed on the lifting limit mechanism 7. The middle part of the locking plate 41 is connected to the partition of the circuit breaker 100 through a rotating shaft. One end of the locking plate 41 is used to engage with the trip coil drive shaft of the circuit breaker 100. The other end of the locking plate 41 is connected to the interlocking component 4 through the first tension spring 42. The lifting transmission mechanism 5 is mounted on the circuit breaker 100 in a liftable manner. The rotating plate 81 is connected to the upper end of the lifting transmission mechanism 5 through a rotating shaft. The lower end of the operating limit plate 8 is provided with an elongated hole 83. The movable pin 82 is mounted on the upper end of the rotating plate 81 and inserted into the elongated hole 83. The upper end of the operating limit plate 8 is fixedly connected to the operating hole baffle of the circuit breaker 100.

[0043] In the above embodiments, it should be noted that the circuit breaker 100 and the three-position isolation mechanism 200 are existing structures, and their specific structural components will not be discussed in detail here; the upper end of the operating limit plate 8 is connected to the operating hole baffle of the circuit breaker 100 by bolts.

[0044] The working principle of this mechanical interlock is as follows: Before the switch is energized, the cable compartment door of the switch is closed, the compartment door lock 1 is locked and drives the door lock rod 2 to move to the left. The door lock rod 2 moves to the left and drives the interlock sliding member 3 to move to the left. The interlock sliding member 3 drives the lifting limit mechanism 7 to move down and drives the interlock member 4 to move down and drives the lock plate 41 to rotate until it is separated from the trip coil drive shaft of the circuit breaker 100. At this time, the trip button of the circuit breaker 100 can be pressed normally.

[0045] When the switch is energized, press the trip button of the circuit breaker 100. The first stop 6 rotates with the main shaft of the circuit breaker 100 until it abuts against the lifting limit mechanism 7 to restrict the lifting limit mechanism 7 from moving upward and prevent the door from unlocking. At this time, the lifting transmission mechanism 5 can move downward, the rotating plate 81 can rotate, and the operating limit plate 8 can move left and right. Then, operate the three-position isolation mechanism 200 to put the three-position isolation mechanism 200 in the closed state, press the close button of the circuit breaker 100, and the switch is energized.

[0046] When the closing button of the circuit breaker 100 is pressed, the first abutting member 6 rotates with the main shaft of the circuit breaker 100 to abut against the lower end of the lifting transmission mechanism 5, preventing the lifting transmission mechanism 5 from moving downward. The upper and lower limits of the circuit breaker 100 operating hole baffle and the lifting transmission mechanism 5 lock the rotating plate 81 and the operating limit plate 8. At the same time, since the three-position isolation mechanism 200 is in the closed state, the grounding baffle is pressed down, preventing the lifting limit mechanism 7 from moving upward. Consequently, the lifting limit mechanism 7 cannot drive the interlocking sliding member 3 to move to the right, and therefore cannot drive the door lock rod 2 to move to the right. The door lock 1 cannot be unlocked, the cable compartment door cannot be opened, and both the circuit breaker 100 and the three-position isolation mechanism 200 are in the closed state, allowing the switch to operate normally.

[0047] When the switch is de-energized or under maintenance, press the trip button of the circuit breaker 100. The first stop 6 rotates with the main shaft of the circuit breaker 100 until it abuts against the lifting limit mechanism 7 to restrict the lifting limit mechanism 7 from moving upward. The lifting transmission mechanism 5 can move downward, the rotating plate 81 can rotate, and the operating limit plate 8 can move left and right. Then, operate the three-position isolation mechanism 200 to put the three-position isolation mechanism 200 in a grounded state, and press the close button of the circuit breaker 100. At this time, since the three-position isolation mechanism 200 is in a grounded state, the grounding baffle moves upward, causing the lifting limit mechanism 7 to move upward. The upward movement of the lifting limit mechanism 7 causes the interlocking sliding member 3 to move to the right, causing the door lock rod 2 to move to the right to drive the door lock 1 to unlock. The cable compartment door opens for maintenance personnel to inspect and maintain it.

[0048] The technical effects achieved by the above embodiments are as follows: This mechanical interlock, through the linkage of the door lock 1, door lock rod 2, interlock sliding member 3, interlock member 4, lock plate 41, lifting transmission mechanism 5, first stop member 6, lifting limit mechanism 7, operation limit plate 8, rotating plate 81 and moving pin 82, ensures that when the circuit breaker 100 is in the closed state, the three-position isolation mechanism 200 is strictly prohibited from performing closed isolation or closed grounding operations to prevent arcing faults caused by load operation; when the three-position isolation mechanism 200 is in the open position or grounding position, the circuit breaker 100 must remain open and must not be closed to avoid connecting the grounding or isolation circuit under power; the door is opened only when the three-position isolation mechanism 200 is in the grounding position to ensure maintenance safety; in addition, this mechanical interlock adopts a purely mechanical structure without electrical components, so there will be no problems such as delayed or inaccurate transmission of action signals, avoiding the risk of misoperation.

[0049] Optional, such as Figures 1 to 6 , Figure 8 , Figure 10 , Figure 12 , Figure 16 as well as Figure 17 As shown, the upper end of the lifting limit mechanism 7 abuts against the lower side wall of the grounding baffle of the three-position isolation mechanism 200; the door lock 1 includes a lock block 11, an interlock hook 12, a hook top plate 13, a second tension spring top plate 14, and a second tension spring 15. The lock block 11 is installed on the cable compartment door of the ring network cabinet. The interlock hook 12 is connected to the door lock rod 2 by a rotating shaft. One end of the interlock hook 12 is provided with an inclined surface 121. The hook top plate 13 is installed on the ring network cabinet and abuts against the inclined surface 121. The second tension spring top plate 14 is installed on the door lock rod 2 and is located between the interlock hook 12 and the hook top plate 13. The second tension spring 15 is sleeved on the door lock rod 2 and one end is connected to the hook top plate 13. The other end of the second tension spring 15 is connected to the second tension spring top plate 14. The end of the interlocking hook 12 is integrally formed with a locking hook 123. A first groove 122 is formed between the locking hook 123 and the interlocking hook 12. A locking block 111 is installed at the end of the locking block 11. A second groove 114 is formed between the locking block 111 and the locking block 11. When the door is closed, the locking hook 123 abuts against the locking block 111. The locking block 111 is inserted into the first groove 122, and the locking hook 123 is inserted into the second groove 114.

[0050] In the above optional embodiments, it should be noted that the locking block 11 is installed on the cable compartment door of the ring main unit by means of bolt connection.

[0051] The length of the first slot 122 is greater than the thickness of the locking block 111, and the length of the second slot 114 is greater than the thickness of the locking hook 123; when the door lock 1 is closed, there is a gap between the door lock rod 2 and the locking block 11.

[0052] At this time, the working principle of this mechanical interlock is as follows: before the switch performs the power supply operation, the three-position isolation mechanism 200 is in the grounded state. The lifting limit mechanism 7 first moves upward, causing the interlock sliding member 3 to move to the right, which in turn causes the door lock rod 2 to move to the right. The door lock rod 2 moving to the right can cause the interlock hook 12 to move to the right to disengage from the restriction of the hook top plate 13. Due to the action of gravity, the interlock hook 12 rotates to the vertical state and closes the door. Then, the lifting limit mechanism 7 moves downward, allowing the interlock sliding member 3 to move to the left, which in turn allows the door lock rod 2 to move to the left. At this time, under the action of the tension of the second tension spring 15, the door lock rod 2 moves to the left. The door lock rod 2 moving to the left causes the interlock hook 12 to move to the left. At the same time, due to the action of the hook top plate 13, the interlock hook 12 can rotate to the horizontal state until the lock hook 123 abuts against the lock block 111. The lock block 111 is inserted into the first slot 122, and the lock hook 123 is inserted into the second slot 114, thus completing the closing of the cable compartment door. At the same time, as the door lock rod 2 moves to the left, it causes the interlocking sliding member 3 to move to the left. The interlocking sliding member 3 causes the lifting limit mechanism 7 to move downward, which in turn causes the interlocking member 4 to move downward, causing the lock plate 41 to rotate until it is separated from the trip coil drive shaft of the circuit breaker 100. At this time, the trip button of the circuit breaker 100 can be pressed normally.

[0053] When the switch is energized, press the trip button of the circuit breaker 100. The first stop 6 rotates with the main shaft of the circuit breaker 100 until it abuts against the lifting limit mechanism 7 to restrict the lifting limit mechanism 7 from moving upward and prevent the door from unlocking. At this time, the lifting transmission mechanism 5 can move downward, the rotating plate 81 can rotate, and the operating limit plate 8 can move left and right. Then, operate the three-position isolation mechanism 200 to put the three-position isolation mechanism 200 in the closed state, press the close button of the circuit breaker 100, and the switch is energized.

[0054] When the closing button of the circuit breaker 100 is pressed, the first abutting member 6 rotates with the main shaft of the circuit breaker 100 to abut against the lower end of the lifting transmission mechanism 5, preventing the lifting transmission mechanism 5 from moving downward. The operating hole baffle of the circuit breaker 100 and the upper and lower limits of the lifting transmission mechanism 5 lock the rotating plate 81 and the operating limit plate 8. At the same time, since the three-position isolation mechanism 200 is in the closed state, the grounding baffle presses down to abut against the lifting limit mechanism 7, preventing the lifting limit mechanism 7 from moving upward. Consequently, the interlocking sliding member 3 cannot move to the right, and the locking rod 73 cannot move to the right. Therefore, the door lock 1 cannot be unlocked. Even if the door is pulled by external force, the second tension spring 15 will cause the locking hook 123 to always abut against the locking block 111, thus preventing the door lock 1 from being unlocked. The cable door cannot be opened, and the circuit breaker 100 and the three-position isolation mechanism 200 are both in the closed state, allowing the switch to operate normally.

[0055] When the switch is de-energized or undergoing maintenance, pressing the trip button of circuit breaker 100 causes the first stop 6 to rotate with the main shaft of circuit breaker 100 until it abuts against the lifting limit mechanism 7, restricting its upward movement. The lifting transmission mechanism 5 can then move downwards, the rotating plate 81 can rotate, and the operating limit plate 8 can move left and right. Then, the three-position isolation mechanism 200 is operated to ground, and the closing button of circuit breaker 100 is pressed. At this time, because the three-position isolation mechanism 200 is grounded, When the grounding baffle moves upward, the lifting limit mechanism 7, no longer restricted by the grounding baffle, can move upward. The upward movement of the lifting limit mechanism 7 causes the interlocking sliding member 3 to move to the right, which in turn causes the door lock rod 2 to move to the right. The rightward movement of the door lock rod 2 can cause the interlocking hook 12 to move to the right to disengage from the restriction of the hook top plate 13. At the same time, the locking hook 123 of the interlocking hook 12 and the locking block 111 of the locking block 11 will not abut against each other. Due to the effect of gravity, the interlocking hook 12 rotates to a vertical position to disengage from the locking block 11. The warehouse door lock 1 can then be opened normally for maintenance personnel to inspect and maintain.

[0056] Optional, such as Figures 1 to 8 , Figure 10 as well as Figure 12 As shown, the lifting limit mechanism 7 includes a three-position isolation limit member 71, a guide sleeve 72, a locking rod 73, and a second abutment member 74. The interlocking sliding member 3 includes an interlocking side plate 31 and an interlocking connecting plate 32. The upper end of the three-position isolation limit member 71 abuts against the grounding baffle of the three-position isolation mechanism 200. The guide sleeve 72 is installed on the top of the circuit breaker 100, and the upper end of the locking rod 73 passes through the guide sleeve 72 and connects to the three-position isolation limit member 71. The second abutment member 74 is installed on... When the lock is opened, the first stop 6 and the second stop 74 abut against each other on the locking rod 73. The lower end of the locking rod 73 is provided with an elongated hole 731. A pin is inserted into the side wall of the elongated hole 731. The interlocking side plate 31 is inserted into the elongated hole 731 and is located between the pin and the bottom wall of the elongated hole 731. The cross-sectional shape of the interlocking side plate 31 is a right trapezoid. The surface corresponding to the inclined waist of the interlocking side plate 31 abuts against the pin. The door lock rod 2 is connected to the interlocking side plate 31 through the interlocking connecting plate 32.

[0057] In the above optional embodiments, it should be noted that the interlocking sliding member 3 also includes an interlocking top plate 33, which is rectangular in shape. The interlocking side plate 31 and the interlocking connecting plate 32 are perpendicular to each other. The interlocking side plate 31 and the interlocking connecting plate 32 are respectively welded to two mutually perpendicular side walls of the interlocking top plate 33. An interlocking slot 34 is provided on the interlocking top plate 33. One side wall of the elongated hole 731 of the locking rod 73 is inserted into the interlocking slot 34. The two ends of the pin are respectively connected to the two side walls of the elongated hole 731 by means of screwing or welding. The locking rod 73 and the interlocking connecting plate 32 are fixedly connected by means of snap-fitting, screwing or welding.

[0058] Optional, such as Figures 1 to 5 and Figure 9 As shown, the door lock rod 2 includes a first rod body 21 and a second rod body 22. One end of the first rod body 21 is fixedly connected to the connecting plate, and one end of the second rod body 22 is connected to the other end of the first rod body 21 by bolts. The other end of the second rod body 22 is rotatably connected to an interlocking hook 12 via a rotating shaft. The hook top plate 13 and the second tension spring 15 are both sleeved on the second rod body 22, and the second tension spring top plate 14 is fixedly connected to the second rod body 22.

[0059] Optional, such as Figures 1 to 5 and Figure 9 As shown, the lock block 11 includes a connecting seat 112 and a lock body 113. The connecting seat 112 is installed on the door, one end of the lock body 113 is fixedly connected to the connecting seat 112, and the other end of the lock body 113 is equipped with a lock block 111.

[0060] In the above optional embodiments, it should be noted that the lock body 113 and the connecting seat 112 are integrally formed and a second slot 114 is formed between them and the lock block 111. Here, it should be emphasized that the second slot 114 is opened on the lock body 113, but one side wall of the lock block 111 serves as the side wall of the second slot 114; the door here is the door of the existing switch.

[0061] Optional, such as Figures 1 to 8 , Figure 10 , Figure 12 , Figure 16 , Figure 17 , Figure 22 and Figure 23As shown, the lifting limit mechanism 7 also includes a lifting transition plate 76, and the three-position isolation limit component 71 includes a bottom connecting plate 711, a first side plate 712, and a second side plate 713. The bottom connecting plate 711 is connected to the upper end of the locking rod 73 through the lifting transition plate 76. The first side plate 712 is fixedly connected to one side of the bottom connecting plate 711, and the second side plate 713 is fixedly connected to the other side of the bottom connecting plate 711. The upper end of the first side plate 712 abuts against the grounding baffle of the three-position isolation mechanism 200, and the second side plate 713 is connected to the operation panel of the three-position isolation mechanism 200 and can move up and down relative to the operation panel of the three-position isolation mechanism 200.

[0062] In the above optional embodiments, it should be noted that the lifting limit mechanism 7 further includes a lifting adjustment assembly 75. The lifting adjustment assembly 75 includes a fixing member 751, a lifting adjustment rod 752, and a lifting connecting rod 753. The lifting connecting rod 753 is installed on the upper end of the locking rod 73 by means of screwing or welding. The lifting transition plate 76 is fixed to the lifting connecting rod 753 by welding or screwing. The fixing member 751 is sleeved on the lifting connecting rod 753 and connected to the lifting connecting rod 753 by means of welding or screwing. The fixing member 751 has a self- The first arc hole 7514, the transition strip hole 7515, and the second arc hole 7516 are connected sequentially from top to bottom. The diameter of the first arc hole 7514 is equal to the diameter of the second arc hole 7516 and is greater than the width of the transition strip hole 7515. One end of the lifting adjustment rod 752 is connected to the lifting connecting rod 753 through a bearing. When the door lock 1 is locked, the other end of the lifting adjustment rod 752 is inserted into the position of the second arc hole 7516. When the door lock 1 is unlocked, the other end of the lifting adjustment rod 752 is inserted into the position of the first arc hole 7514.

[0063] The fastener 751 includes a fixed top plate 7511, a fixed bottom plate 7512, and a fixed side plate 7513. The fixed top plate 7511 and the fixed bottom plate 7512 are connected to the fixed side plate 7513 by welding or integral molding. The fixed top plate 7511 and the fixed bottom plate 7512 are both welded or screwed to the lifting connecting rod 753. The first arc hole 7514, the transition strip hole 7515, and the second arc hole 7516 are all opened in the fixed side plate 7513. The lifting adjustment rod 752 includes a connecting rod 7521 and an adjusting shaft 7522. One end of the connecting rod 7521 is connected to the lifting connecting rod 753 via a bearing. The adjusting shaft 7522 is welded to or integrally formed with the other end of the connecting rod 7521. When the door lock 1 is locked, the adjusting shaft 7522 is inserted into the position of the second arc hole 7516. When the door lock 1 is unlocked, the adjusting shaft 7522 is inserted into the position of the first arc hole 7514.

[0064] The cross-sectional shape of the adjusting shaft 7522 can be rectangular, with the width of the rectangle being less than the width of the transition strip hole 7515 and the length being greater than the width of the transition strip hole 7515 and less than the diameter of the first arc hole 7514. Alternatively, the four sides of the adjusting shaft 7522 can be two opposing arc surfaces 7523 and two opposing planes 7524, respectively. The distance between the two opposing arc surfaces 7523 is greater than the distance between the two opposing planes 7524, the distance between the two opposing planes 7524 is less than the width of the transition strip hole 7515, and the maximum distance between the two opposing arc surfaces 7523 is greater than the width of the transition strip hole 7515 and less than the diameter of the first arc hole 7514.

[0065] The advantages of the above optional embodiments are: the lifting adjustment component 75 ensures the controllability and reliability of the lifting of the locking rod 73, thereby ensuring the reliability of locking and unlocking of the door lock 1.

[0066] Optional, such as Figures 1 to 8 and Figure 17 As shown, it also includes a tripping baffle 43 and a support plate 44. The tripping baffle 43 is installed on the tripping coil drive shaft of the circuit breaker 100, and a slot 411 is provided on the locking plate 41. When closing, the tripping baffle 43 is inserted into the slot 411.

[0067] In the above optional embodiments, it should be noted that the mounting plate 46 is bolted to the locking rod 73. One end of the mounting plate 46 is provided with a first plate 45, and the other end of the mounting plate 46 is provided with a second plate 47. The upper end of the second plate 47 is provided with a stop plate 48. The first plate 45, the mounting plate 46, the second plate 47 and the stop plate 48 are integrally bent and formed. The stop plate 48 is used to contact the limit switch 91 described below. The first plate is connected to one end of the locking plate 41 through a first tension spring 42.

[0068] The advantages of the above optional embodiments are: the reliability of the locking plate 41 and the circuit breaker 100’s trip coil drive shaft is improved by setting the trip baffle 43 and the support plate 44.

[0069] Optional, such as Figures 1 to 7 As shown, the lifting transmission mechanism 5 includes a lifting rod 51, a lifting baffle 52, and a lifting linkage plate 53. The lifting rod 51 is installed in the circuit breaker 100 in a liftable manner. The lifting linkage plate 53 is connected to the upper end of the lifting rod 51 through the lifting baffle 52. The rotating plate 81 is connected to the lifting linkage plate 53 through a rotating shaft.

[0070] In the above optional embodiments, it should be noted that the lowering transmission mechanism also includes a guide frame 54, which is installed in the housing of the circuit breaker 100 by welding or screwing, and the lifting rod 51 is inserted into the guide frame 54 in a lifting manner.

[0071] The lifting linkage plate 53 and the lifting baffle 52 are connected by bolts or welding, and the lifting baffle 52 is connected to the upper end of the lifting square rod 51 by bolts or welding.

[0072] Optional, such as Figures 1 to 8 and Figure 13 and Figure 14 As shown, the first abutment 6 includes a first limiting cam 61 and a second limiting cam 62. Both the first limiting cam 61 and the second limiting cam 62 are mounted on the main shaft of the circuit breaker 100. When the circuit is open, the first limiting cam 61 abuts against the second abutment 74. When the circuit is closed, the second limiting cam 62 abuts against the lower end of the lifting rod 51.

[0073] In the above optional embodiments, it should be noted that the first limiting cam 61 includes a first connecting ring 611 and a first abutting rod 612. The first connecting ring 611 and the first abutting rod 612 are integrally formed. The first connecting ring 611 is installed on the main shaft of the circuit breaker 100. When the circuit is opened, the first abutting rod 612 abuts against the second abutting member 74.

[0074] The second limiting cam 62 includes a second connecting ring 621 and a second abutting rod 622. The second connecting ring 621 and the second abutting rod 622 are integrally formed. The second connecting ring 621 is installed on the main shaft of the circuit breaker 100. When the circuit is closed, the second abutting rod 622 abuts against the lower end of the lifting rod 51.

[0075] The angle between the first stop rod 612 and the second stop rod 622 is 60 degrees.

[0076] The second abutment 74 includes a first connecting piece 741, a second connecting piece 742, and a baffle 743. The baffle 743 is used to abut against the second abutment rod 622. The first connecting piece 741 is connected to the baffle 743 through the second connecting piece 742, and the first connecting piece 741, the second connecting piece 742, and the baffle 743 are integrally bent. The second connecting piece 742 is perpendicular to the first connecting piece 741, the baffle 743 is perpendicular to the first connecting piece 741, and the second connecting piece 742 is perpendicular to the baffle 743. The second connecting piece 742 is connected to the locking rod 73 by bolts.

[0077] Optional, such as Figures 1 to 7 As shown, it also includes a limit switch frame 9 and a limit switch 91. The limit switch frame 9 is mounted on the circuit breaker 100, and the limit switch 91 is mounted on the limit switch frame 9. The limit switch 91 is used to limit the travel of the locking rod 73.

[0078] In the above optional embodiments, it should be noted that the limit switch 91 is installed on the limit switch frame 9 by means of screw connection or snap connection, and the limit switch frame 9 is installed on the circuit breaker 100 by means of screw connection or snap connection.

[0079] like Figures 1 to 23 As shown. The working principle of this mechanical interlock is as follows: Before the switch is powered on, the three-position isolation mechanism 200 is in a grounded state. The lifting adjustment rod 752 rotates to a state where it can move up and down. Then, the lifting adjustment rod 752 moves upward to the position where it is inserted into the first arc hole 7514 and rotates to fix it. During the upward movement of the lifting adjustment rod 752, it drives the locking rod 73 to move upward, which drives the interlock sliding member 3 to move to the right, which drives the door lock rod 2 to move to the right. The rightward movement of the door lock rod 2 can drive the interlock hook 12 to move to the right to disengage from the restriction of the hook top plate 13. Due to the effect of gravity, the interlock hook 12 rotates to a vertical state and then closes the door. Then, the lifting adjustment rod 752 rotates to a state where it can move up and down. When the locking rod 73 moves downward, the interlocking sliding member 3 moves to the left, which in turn allows the door lock rod 2 to move to the left. At this time, under the tension of the second tension spring 15, the door lock rod 2 moves to the left. The leftward movement of the door lock rod 2 drives the interlocking hook 12 to move to the left. At the same time, due to the action of the hook top plate 13, the interlocking hook 12 can rotate to a horizontal state until the lock hook 123 abuts against the lock block 111. The lock block 111 is inserted into the first slot 122, and the lock hook 123 is inserted into the second slot 114, thus completing the closing of the cable compartment door. At this time, the lifting adjustment rod 752 is located on the second arc hole 7516. Then, the lifting adjustment rod 752 is rotated so that the lifting adjustment rod 752 cannot move up or down.

[0080] At the same time, as the door lock rod 2 moves to the left, it causes the interlocking sliding member 3 to move to the left. The interlocking sliding member 3 causes the locking rod 73 to move downward, which in turn causes the interlocking member 4 to move downward, causing the locking plate 41 to rotate until it is separated from the tripping coil drive shaft of the circuit breaker 100. At this time, the tripping button of the circuit breaker 100 can be pressed normally.

[0081] When the switch is energized, pressing the trip button of the circuit breaker 100 causes the first limit cam 61 to rotate 60 degrees with the main shaft of the circuit breaker 100, so that the first stop rod 612 abuts against the second stop member 74 of the lifting limit mechanism 7 to restrict the lifting limit mechanism 7 from moving upward and prevent the door from unlocking. At this time, the second limit cam 62 disengages from the lifting square rod 51, the lifting square rod 51 can move downward, the rotating plate 81 can rotate, and the operating limit plate 8 can move left and right. Then, the three-position isolation mechanism 200 is operated to put the three-position isolation mechanism 200 in the closed state, and the closing button of the circuit breaker 100 is pressed to complete the switch energization.

[0082] When the closing button of the circuit breaker 100 is pressed, the second limit cam 62 rotates counterclockwise 60 degrees with the main shaft of the circuit breaker 100, causing the lower end of the lifting rod 51 to abut against the second stop rod 622, preventing the lifting transmission mechanism 5 from moving downward. The upper and lower limits of the circuit breaker 100 operating hole baffle and the lifting transmission mechanism 5 lock the rotating plate 81 and the operating limit plate 8. At the same time, since the three-position isolation mechanism 200 is in the closed state, the grounding baffle presses down to block the lifting limit mechanism 7, preventing the lifting limit mechanism 7 from moving upward. Consequently, the interlocking sliding member 3 cannot move to the right, and the locking rod 73 cannot move to the right. Therefore, the door lock 1 cannot be unlocked. Even if the door is pulled by external force, the second tension spring 15 will cause the locking hook 123 to always abut against the locking block 111, thus preventing the door lock 1 from being unlocked. The cable door cannot be opened, and the circuit breaker 100 and the three-position isolation mechanism 200 are both in the closed state, allowing the switch to operate normally.

[0083] When the switch is de-energized or undergoing maintenance, pressing the trip button of circuit breaker 100 causes the first limit cam 61 to rotate 60 degrees with the main shaft of circuit breaker 100, causing the first stop rod 612 to abut against the second stop member 74 of the lifting limit mechanism 7, thus restricting the upward movement of the lifting limit mechanism 7. The lifting transmission mechanism 5 can move downward, the rotating plate 81 can rotate, and the operating limit plate 8 can move left and right. Then, the three-position isolation mechanism 200 is operated to put the three-position isolation mechanism 200 into a grounded state, and the closing button of circuit breaker 100 is pressed. At this time, because the three-position isolation mechanism 200 is in a grounded state, the grounding baffle moves upward, and the three-position isolation limit member 71 of the lifting limit mechanism 7, no longer restricted by the grounding baffle, can move upward. The locking rod 73 can move upward, and then the lifting adjustment rod 752 rotates to a state where it can move up and down. Then the lifting adjustment rod 752 moves upward to the position where it is inserted into the first arc hole 7514 and rotates to fix it. During the upward movement of the lifting adjustment rod 752, the locking rod 73 is driven to move upward until the limit switch 91 contacts the stop plate 48, which drives the interlocking sliding member 3 to move to the right and drives the door lock rod 2 to move to the right. The rightward movement of the door lock rod 2 can drive the interlocking hook 12 to move to the right to get out of the restriction of the hook top plate 13. At the same time, the locking hook 123 of the interlocking hook 12 and the locking block 111 of the lock block 11 will not abut against each other. Due to the effect of gravity, the interlocking hook 12 rotates to a vertical state to get out of the lock block 11. The warehouse door lock 1 can be opened normally for maintenance personnel to inspect and maintain.

[0084] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall fall within the scope of the present invention.

Claims

1. A mechanical interlock for a gas-insulated metal-enclosed switch, characterized in that, It includes a door lock (1), a door lock rod (2), an interlocking sliding part (3), an interlocking part (4), a lock plate (41), a lifting transmission mechanism (5), a first stop part (6), a lifting limit mechanism (7), an operation limit plate (8), a rotating plate (81), and a moving pin (82). The door lock (1) is used to lock the cable storage door. The interlocking sliding member (3) is connected to the door lock (1) through the door lock rod (2). The lower end of the lifting limit mechanism (7) is connected to the interlocking sliding member (3), and the upper end of the lifting limit mechanism (7) abuts against the grounding baffle of the three-position isolation mechanism (200). When the cable storage door is closed, the door lock (1) is locked and the interlocking sliding member (3) is moved to the left by the door lock rod (2). The interlocking sliding member (3) moves the lifting limit mechanism (7) downward. During maintenance, the lifting limit mechanism (7) moves upward, moves the interlocking sliding member (3) to the right, and moves the door lock rod (2) to the right to unlock the door lock (1). The first abutment (6) is sleeved on the main shaft of the circuit breaker (100); when the circuit is open, the first abutment (6) abuts against the lifting limit mechanism (7) to restrict the lifting limit mechanism (7) from moving upward; when the circuit is closed, the first abutment (6) abuts against the lower end of the lifting transmission mechanism (5) to restrict the lifting transmission mechanism (5) from moving downward. The interlocking component (4) is installed on the lifting limit mechanism (7). The middle part of the locking plate (41) is connected to the partition of the circuit breaker (100) through a rotating shaft. One end of the locking plate (41) is used to engage with the trip coil drive shaft of the circuit breaker (100). The other end of the locking plate (41) is connected to the interlocking component (4) through a first tension spring (42). The lifting transmission mechanism (5) is mounted on the circuit breaker (100) in a liftable manner. The rotating plate (81) is connected to the upper end of the lifting transmission mechanism (5) through a rotating shaft. The lower end of the operation limit plate (8) is provided with an elongated hole (83). The movable pin (82) is mounted on the upper end of the rotating plate (81) and inserted into the elongated hole (83). The upper end of the operation limit plate (8) is fixedly connected to the operating hole baffle of the circuit breaker (100).

2. The mechanical interlock of the gas-insulated metal-enclosed switch according to claim 1, characterized in that, The upper end of the lifting limit mechanism (7) abuts against the lower side wall of the grounding baffle of the three-position isolation mechanism (200); the door lock (1) includes a lock block (11), an interlock hook (12), a hook top plate (13), a second tension spring top plate (14), and a second tension spring (15). The lock block (11) is installed on the cable compartment door of the ring main unit. The interlock hook (12) is connected to the door lock rod (2) through a rotating shaft. One end of the interlock hook (12) is provided with an inclined... Inclined surface (121), the hook top plate (13) is installed on the ring main unit and abuts against the inclined surface (121), the second tension spring top plate (14) is installed on the door lock rod (2) and is located between the interlock hook (12) and the hook top plate (13), the second tension spring (15) is sleeved on the door lock rod (2) and one end is connected to the hook top plate (13), and the other end of the second tension spring (15) is connected to the second tension spring top plate (14); The end of the interlocking hook (12) is integrally formed with a locking hook (123). A first groove (122) is formed between the locking hook (123) and the interlocking hook (12). A locking block (111) is installed at the end of the locking block (11). A second groove (114) is formed between the locking block (111) and the locking block (11). When the door is closed, the locking hook (123) abuts against the locking block (111). The locking block (111) is inserted into the first groove (122), and the locking hook (123) is inserted into the second groove (114).

3. The mechanical interlock of the gas-insulated metal-enclosed switch according to claim 2, characterized in that, The lifting limit mechanism (7) includes a three-position isolation limit component (71), a guide sleeve (72), a locking rod (73), and a second abutment component (74). The interlocking sliding component (3) includes an interlocking side plate (31) and an interlocking connecting plate (32). The upper end of the three-position isolation limit component (71) abuts against the grounding baffle of the three-position isolation mechanism (200). The guide sleeve (72) is installed on the top of the circuit breaker (100). The upper end of the locking rod (73) passes through the guide sleeve (72) and is connected to the three-position isolation limit member (71). The second abutment member (74) is installed on the locking rod (73). When the circuit is opened, the first abutment member (6) abuts against the second abutment member (74). The lower end of the locking rod (73) is provided with an elongated hole (731). A pin is inserted into the side wall of the elongated hole (731). The interlocking side plate (31) is inserted into the elongated hole (731) and is located between the pin and the bottom wall of the elongated hole (731). The cross-sectional shape of the interlocking side plate (31) is a right trapezoid. The surface corresponding to the inclined waist of the interlocking side plate (31) abuts against the pin. The door lock rod (2) is connected to the interlocking side plate (31) through the interlocking connecting plate (32).

4. The mechanical interlock of the gas-insulated metal-enclosed switch according to claim 2, characterized in that, The door lock rod (2) includes a first rod body (21) and a second rod body (22). One end of the first rod body (21) is fixedly connected to the connecting plate. One end of the second rod body (22) is connected to the other end of the first rod body (21) by bolts. The other end of the second rod body (22) is rotatably connected to the interlocking hook (12) through a rotating shaft. The hook top plate (13) and the second tension spring (15) are both sleeved on the second rod body (22). The second tension spring top plate (14) is fixedly connected to the second rod body (22).

5. The mechanical interlock of the gas-insulated metal-enclosed switch according to claim 2, characterized in that, The lock block (11) includes a connecting seat (112) and a lock body (113). The connecting seat (112) is installed on the door. One end of the lock body (113) is fixedly connected to the connecting seat (112), and the other end of the lock body (113) is equipped with the lock block (111).

6. The mechanical interlock of the gas-insulated metal-enclosed switch according to claim 3, characterized in that, The lifting limit mechanism (7) further includes a lifting transition plate (76). The three-position isolation limit component (71) includes a bottom connecting plate (711), a first side plate (712), and a second side plate (713). The bottom connecting plate (711) is connected to the upper end of the locking rod (73) through the lifting transition plate (76). The first side plate (712) is fixedly connected to one side of the bottom connecting plate (711), and the second side plate (713) is fixedly connected to the other side of the bottom connecting plate (711). The upper end of the first side plate (712) abuts against the grounding baffle of the three-position isolation mechanism (200). The second side plate (713) is connected to the operation panel of the three-position isolation mechanism (200) and can move up and down relative to the operation panel of the three-position isolation mechanism (200).

7. The mechanical interlock of the gas-insulated metal-enclosed switch according to claim 1, characterized in that, It also includes a tripping baffle (43) and a support plate (44). The tripping baffle (43) is installed on the tripping coil drive shaft of the circuit breaker (100). A slot (411) is provided on the locking plate (41). When the circuit is closed, the tripping baffle (43) is inserted into the slot (411).

8. The mechanical interlock of the gas-insulated metal-enclosed switch according to claim 3, characterized in that, The lifting transmission mechanism (5) includes a lifting rod (51), a lifting baffle (52), and a lifting linkage plate (53). The lifting rod (51) is installed in the circuit breaker (100) in a liftable manner. The lifting linkage plate (53) is connected to the upper end of the lifting rod (51) through the lifting baffle (52). The rotating plate (81) is connected to the lifting linkage plate (53) through a rotating shaft.

9. The mechanical interlock of the gas-insulated metal-enclosed switch according to claim 8, characterized in that, The first abutment (6) includes a first limiting cam (61) and a second limiting cam (62). Both the first limiting cam (61) and the second limiting cam (62) are mounted on the main shaft of the circuit breaker (100). When the circuit is open, the first limiting cam (61) abuts against the second abutment (74). When the circuit is closed, the second limiting cam (62) abuts against the lower end of the lifting rod (51).

10. The mechanical interlock of the gas-insulated metal-enclosed switch according to claim 9, characterized in that, It also includes a limit switch holder (9) and a limit switch (91), the limit switch holder (9) being mounted on the circuit breaker (100), and the limit switch (91) being mounted on the limit switch holder (9), the limit switch (91) being used to limit the travel of the locking rod (73).

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